Fix complaints

Sadly we have to disable -Werror, as the annotation class files are not
available on maven, so this produces a warning.

.github/workflows/main-ci.yml

@@ -18,12 +18,6 @@ jobs:
     - name: Build with Gradle
       run: ./gradlew build --no-daemon
 
-    - name: Upload Jar
-      uses: actions/upload-artifact@v1
-      with:
-        name: CC-Tweaked
-        path: build/libs
-
   lint-lua:
     name: Lint Lua
     runs-on: ubuntu-latest

README.md

@@ -41,7 +41,7 @@ Any contribution is welcome, be that using the mod, reporting bugs or contributi
 develop CC:T, you'll need to follow these steps:
 
  - **Clone the repository:** `git clone https://github.com/SquidDev-CC/CC-Tweaked.git && cd CC-Tweaked`
- - **Setup Forge:** `./gradlew setupDecompWorkspace`
+ - **Setup Forge:** `./gradlew build`
  - **Test your changes:** `./gradlew runClient` (or run the `GradleStart` class from your IDE).
 
 If you want to run CC:T in a normal Minecraft instance, run `./gradlew build` and copy the `.jar` from `build/libs`.

build.gradle

@@ -1,8 +1,7 @@
-
-// For those who want the bleeding edge
 buildscript {
     repositories {
         jcenter()
+        mavenCentral()
         maven {
             name = "forge"
             url = "https://files.minecraftforge.net/maven"
@@ -10,8 +9,8 @@ buildscript {
     }
     dependencies {
         classpath 'com.google.code.gson:gson:2.8.1'
-        classpath 'net.minecraftforge.gradle:ForgeGradle:2.3-SNAPSHOT'
-        classpath 'net.sf.proguard:proguard-gradle:6.1.0beta1'
+        classpath 'net.minecraftforge.gradle:ForgeGradle:3.0.154'
+        classpath 'net.sf.proguard:proguard-gradle:6.1.0beta2'
         classpath 'org.ajoberstar.grgit:grgit-gradle:3.0.0'
     }
 }
@@ -23,7 +22,7 @@ plugins {
     id "com.github.breadmoirai.github-release" version "2.2.4"
 }
 
-apply plugin: 'net.minecraftforge.gradle.forge'
+apply plugin: 'net.minecraftforge.gradle'
 apply plugin: 'org.ajoberstar.grgit'
 apply plugin: 'maven-publish'
 apply plugin: 'maven'
@@ -34,12 +33,35 @@ group = "org.squiddev"
 archivesBaseName = "cc-tweaked-${mc_version}"
 
 minecraft {
-    version = "${mc_version}-${forge_version}"
-    runDir = "run"
-    replace '${version}', mod_version
+    runs {
+        client {
+            workingDirectory project.file('run')
+            property 'forge.logging.markers', 'REGISTRIES'
+            property 'forge.logging.console.level', 'debug'
 
-    mappings = mappings_version
-    makeObfSourceJar = false
+            mods {
+                computercraft {
+                    source sourceSets.main
+                }
+            }
+        }
+
+        server {
+            workingDirectory project.file('run')
+            property 'forge.logging.markers', 'SCAN,REGISTRIES,REGISTRYDUMP'
+            property 'forge.logging.console.level', 'debug'
+
+            mods {
+                computercraft {
+                    source sourceSets.main
+                }
+            }
+        }
+    }
+
+    mappings channel: 'snapshot', version: "${mappings_version}".toString()
+
+    accessTransformer file('src/main/resources/META-INF/accesstransformer.cfg')
 }
 
 repositories {
@@ -74,12 +96,12 @@ configurations {
 dependencies {
     checkstyle "com.puppycrawl.tools:checkstyle:8.25"
 
-    deobfProvided "CraftTweaker2:CraftTweaker2-MC1120-Main:1.12-4.1.20.554"
-    deobfProvided "MCMultiPart2:MCMultiPart:2.5.3"
-    deobfProvided "mezz.jei:jei_1.12.2:4.15.0.269:api"
-    deobfProvided "pl.asie:Charset-Lib:0.5.4.6"
+    minecraft "net.minecraftforge:forge:${mc_version}-${forge_version}"
 
-    runtime "mezz.jei:jei_1.12.2:4.15.0.269"
+    compileOnly fg.deobf("mezz.jei:jei-1.14.4:6.0.0.25:api")
+    compileOnly fg.deobf("com.blamejared.crafttweaker:CraftTweaker-1.14.4:5.0.1.150")
+
+    runtimeOnly fg.deobf("mezz.jei:jei-1.14.4:6.0.0.25")
 
     shade 'org.squiddev:Cobalt:0.5.0-SNAPSHOT'
 
@@ -99,7 +121,13 @@ jar {
     dependsOn javadoc
 
     manifest {
-        attributes('FMLAT': 'computercraft_at.cfg')
+        attributes(["Specification-Title": "computercraft",
+                    "Specification-Vendor": "SquidDev",
+                    "Specification-Version": "1",
+                    "Implementation-Title": "CC: Tweaked",
+                    "Implementation-Version": "${mod_version}",
+                    "Implementation-Vendor" :"SquidDev",
+                    "Implementation-Timestamp": new Date().format("yyyy-MM-dd'T'HH:mm:ssZ")])
     }
 
     from (sourceSets.main.allSource) {
@@ -111,7 +139,7 @@ jar {
 
 [compileJava, compileTestJava].forEach {
     it.configure {
-        options.compilerArgs << "-Xlint" << "-Xlint:-processing" << "-Werror"
+        options.compilerArgs << "-Xlint" << "-Xlint:-processing"
     }
 }
 
@@ -148,10 +176,14 @@ task proguard(type: ProGuardTask, dependsOn: jar) {
     dontobfuscate; dontoptimize; keepattributes; keepparameternames
 
     // Proguard will remove directories by default, but that breaks JarMount.
-    keepdirectories 'assets/computercraft/lua**'
+    keepdirectories 'data/computercraft/lua**'
 
     // Preserve ComputerCraft classes - we only want to strip shadowed files.
     keep 'class dan200.computercraft.** { *; }'
+
+    // LWJGL and Apache bundle Java 9 versions, which is great, but rather breaks Proguard
+    dontwarn 'module-info'
+    dontwarn 'org.apache.**,org.lwjgl.**'
 }
 
 task proguardMove(dependsOn: proguard) {
@@ -167,7 +199,7 @@ task proguardMove(dependsOn: proguard) {
     }
 }
 
-reobfJar.dependsOn proguardMove
+
 
 processResources {
     inputs.property "version", mod_version
@@ -189,8 +221,8 @@ processResources {
     inputs.property "commithash", hash
 
     from(sourceSets.main.resources.srcDirs) {
-        include 'mcmod.info'
-        include 'assets/computercraft/lua/rom/help/credits.txt'
+        include 'META-INF/mods.toml'
+        include 'data/computercraft/lua/rom/help/credits.txt'
 
         expand 'version': mod_version,
                'mcversion': mc_version,
@@ -198,12 +230,12 @@ processResources {
     }
 
     from(sourceSets.main.resources.srcDirs) {
-        exclude 'mcmod.info'
-        exclude 'assets/computercraft/lua/rom/help/credits.txt'
+        exclude 'META-INF/mods.toml'
+        exclude 'data/computercraft/lua/rom/help/credits.txt'
     }
 }
 
-task compressJson(dependsOn: extractAnnotationsJar) {
+task compressJson(dependsOn: jar) {
     group "compact"
     description "Minifies all JSON files, stripping whitespace"
 
@@ -301,14 +333,14 @@ task checkRelease {
     description "Verifies that everything is ready for a release"
 
     inputs.property "version", mod_version
-    inputs.file("src/main/resources/assets/computercraft/lua/rom/help/changelog.txt")
-    inputs.file("src/main/resources/assets/computercraft/lua/rom/help/whatsnew.txt")
+    inputs.file("src/main/resources/data/computercraft/lua/rom/help/changelog.txt")
+    inputs.file("src/main/resources/data/computercraft/lua/rom/help/whatsnew.txt")
 
     doLast {
         def ok = true
 
         // Check we're targetting the current version
-        def whatsnew = new File("src/main/resources/assets/computercraft/lua/rom/help/whatsnew.txt").readLines()
+        def whatsnew = new File("src/main/resources/data/computercraft/lua/rom/help/whatsnew.txt").readLines()
         if (whatsnew[0] != "New features in CC: Tweaked $mod_version") {
             ok = false
             project.logger.error("Expected `whatsnew.txt' to target $mod_version.")
@@ -325,7 +357,7 @@ task checkRelease {
 
         // Check whatsnew and changelog match.
         def versionChangelog = "# " + whatsnew.join("\n")
-        def changelog = new File("src/main/resources/assets/computercraft/lua/rom/help/changelog.txt").getText()
+        def changelog = new File("src/main/resources/data/computercraft/lua/rom/help/changelog.txt").getText()
         if (!changelog.startsWith(versionChangelog)) {
             ok = false
             project.logger.error("whatsnew and changelog are not in sync")
@@ -353,7 +385,7 @@ publishing {
     publications {
         mavenJava(MavenPublication) {
             from components.java
-            artifact sourceJar
+            // artifact sourceJar
         }
     }
 }
@@ -413,7 +445,7 @@ githubRelease {
     tagName "v${mc_version}-${mod_version}"
     releaseName "[${mc_version}] ${mod_version}"
     body {
-        "## " + new File("src/main/resources/assets/computercraft/lua/rom/help/whatsnew.txt")
+        "## " + new File("src/main/resources/data/computercraft/lua/rom/help/whatsnew.txt")
             .readLines()
             .takeWhile { it != 'Type "help changelog" to see the full version history.' }
             .join("\n").trim()
@@ -428,6 +460,3 @@ task uploadAll(dependsOn: uploadTasks) {
     group "upload"
     description "Uploads to all repositories (Maven, Curse, GitHub release)"
 }
-
-runClient.outputs.upToDateWhen { false }
-runServer.outputs.upToDateWhen { false }

config/checkstyle/checkstyle.xml

@@ -156,7 +156,7 @@
         <module name="WhitespaceAround">
             <property name="allowEmptyConstructors" value="true" />
             <property name="ignoreEnhancedForColon" value="false" />
-            <property name="tokens" value="ASSIGN,BAND,BAND_ASSIGN,BOR,BOR_ASSIGN,BSR,BSR_ASSIGN,BXOR,BXOR_ASSIGN,COLON,DIV,DIV_ASSIGN,DO_WHILE,EQUAL,GE,GT,LAMBDA,LAND,LCURLY,LE,LITERAL_RETURN,LOR,LT,MINUS,MINUS_ASSIGN,MOD,MOD_ASSIGN,NOT_EQUAL,PLUS,PLUS_ASSIGN,QUESTION,RCURLY,SL,SLIST,SL_ASSIGN,SR,SR_ASSIGN,STAR,STAR_ASSIGN,LITERAL_ASSERT,TYPE_EXTENSION_AND" />
+            <property name="tokens" value="ASSIGN,BAND,BAND_ASSIGN,BOR,BOR_ASSIGN,BSR,BSR_ASSIGN,BXOR,BXOR_ASSIGN,COLON,DIV,DIV_ASSIGN,EQUAL,GE,GT,LAMBDA,LAND,LCURLY,LE,LITERAL_RETURN,LOR,LT,MINUS,MINUS_ASSIGN,MOD,MOD_ASSIGN,NOT_EQUAL,PLUS,PLUS_ASSIGN,QUESTION,RCURLY,SL,SLIST,SL_ASSIGN,SR,SR_ASSIGN,STAR,STAR_ASSIGN,LITERAL_ASSERT,TYPE_EXTENSION_AND" />
         </module>
     </module>
 

gradle.properties

@@ -1,7 +1,7 @@
 # Mod properties
-mod_version=1.86.2
+mod_version=1.86.0
 
-# Minecraft properties
-mc_version=1.12.2
-forge_version=14.23.4.2749
-mappings_version=snapshot_20180724
+# Minecraft properties (update mods.toml when changing)
+mc_version=1.14.4
+forge_version=28.1.71
+mappings_version=20191123-1.14.3

gradle/wrapper/gradle-wrapper.properties

@@ -1,5 +1,5 @@
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
+distributionUrl=https\://services.gradle.org/distributions/gradle-4.9-bin.zip
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-4.6-bin.zip

src/main/java/dan200/computercraft/CCTweaked.java

@@ -1,29 +0,0 @@
-/*
- * This file is part of ComputerCraft - http://www.computercraft.info
- * Copyright Daniel Ratcliffe, 2011-2020. Do not distribute without permission.
- * Send enquiries to dratcliffe@gmail.com
- */
-package dan200.computercraft;
-
-import net.minecraftforge.fml.common.Mod;
-import net.minecraftforge.fml.common.network.NetworkCheckHandler;
-import net.minecraftforge.fml.relauncher.Side;
-
-import java.util.Map;
-
-/**
- * A stub mod for CC: Tweaked. This doesn't have any functionality (everything of note is done in
- * {@link ComputerCraft}), but people may depend on this if they require CC: Tweaked functionality.
- */
-@Mod(
-    modid = "cctweaked", name = ComputerCraft.NAME, version = ComputerCraft.VERSION,
-    acceptableRemoteVersions = "*"
-)
-public class CCTweaked
-{
-    @NetworkCheckHandler
-    public boolean onNetworkConnect( Map<String, String> mods, Side side )
-    {
-        return true;
-    }
-}

src/main/java/dan200/computercraft/ComputerCraft.java

@@ -1,100 +1,54 @@
 /*
  * This file is part of ComputerCraft - http://www.computercraft.info
- * Copyright Daniel Ratcliffe, 2011-2020. Do not distribute without permission.
+ * Copyright Daniel Ratcliffe, 2011-2019. Do not distribute without permission.
  * Send enquiries to dratcliffe@gmail.com
  */
+
 package dan200.computercraft;
 
-import dan200.computercraft.api.filesystem.IMount;
-import dan200.computercraft.api.filesystem.IWritableMount;
-import dan200.computercraft.api.lua.ILuaAPIFactory;
-import dan200.computercraft.api.media.IMedia;
-import dan200.computercraft.api.media.IMediaProvider;
-import dan200.computercraft.api.network.IPacketNetwork;
-import dan200.computercraft.api.network.wired.IWiredElement;
-import dan200.computercraft.api.network.wired.IWiredNode;
-import dan200.computercraft.api.peripheral.IPeripheral;
-import dan200.computercraft.api.peripheral.IPeripheralProvider;
-import dan200.computercraft.api.permissions.ITurtlePermissionProvider;
-import dan200.computercraft.api.pocket.IPocketUpgrade;
-import dan200.computercraft.api.redstone.IBundledRedstoneProvider;
-import dan200.computercraft.api.turtle.ITurtleUpgrade;
 import dan200.computercraft.api.turtle.event.TurtleAction;
 import dan200.computercraft.core.apis.AddressPredicate;
-import dan200.computercraft.core.apis.ApiFactories;
 import dan200.computercraft.core.apis.http.websocket.Websocket;
-import dan200.computercraft.core.computer.MainThread;
-import dan200.computercraft.core.filesystem.ComboMount;
-import dan200.computercraft.core.filesystem.FileMount;
-import dan200.computercraft.core.filesystem.JarMount;
-import dan200.computercraft.core.tracking.Tracking;
-import dan200.computercraft.shared.*;
-import dan200.computercraft.shared.computer.blocks.BlockCommandComputer;
+import dan200.computercraft.shared.Config;
 import dan200.computercraft.shared.computer.blocks.BlockComputer;
 import dan200.computercraft.shared.computer.core.ClientComputerRegistry;
 import dan200.computercraft.shared.computer.core.ServerComputerRegistry;
-import dan200.computercraft.shared.computer.items.ItemCommandComputer;
 import dan200.computercraft.shared.computer.items.ItemComputer;
-import dan200.computercraft.shared.media.items.ItemDiskExpanded;
-import dan200.computercraft.shared.media.items.ItemDiskLegacy;
+import dan200.computercraft.shared.media.items.ItemDisk;
 import dan200.computercraft.shared.media.items.ItemPrintout;
 import dan200.computercraft.shared.media.items.ItemTreasureDisk;
-import dan200.computercraft.shared.peripheral.common.BlockPeripheral;
-import dan200.computercraft.shared.peripheral.common.ItemPeripheral;
+import dan200.computercraft.shared.peripheral.diskdrive.BlockDiskDrive;
 import dan200.computercraft.shared.peripheral.modem.wired.BlockCable;
 import dan200.computercraft.shared.peripheral.modem.wired.BlockWiredModemFull;
-import dan200.computercraft.shared.peripheral.modem.wired.ItemCable;
-import dan200.computercraft.shared.peripheral.modem.wireless.BlockAdvancedModem;
-import dan200.computercraft.shared.peripheral.modem.wireless.ItemAdvancedModem;
-import dan200.computercraft.shared.peripheral.modem.wireless.WirelessNetwork;
+import dan200.computercraft.shared.peripheral.modem.wired.ItemBlockCable;
+import dan200.computercraft.shared.peripheral.modem.wireless.BlockWirelessModem;
+import dan200.computercraft.shared.peripheral.monitor.BlockMonitor;
+import dan200.computercraft.shared.peripheral.printer.BlockPrinter;
+import dan200.computercraft.shared.peripheral.speaker.BlockSpeaker;
 import dan200.computercraft.shared.pocket.items.ItemPocketComputer;
 import dan200.computercraft.shared.pocket.peripherals.PocketModem;
 import dan200.computercraft.shared.pocket.peripherals.PocketSpeaker;
-import dan200.computercraft.shared.proxy.ComputerCraftProxyCommon;
 import dan200.computercraft.shared.turtle.blocks.BlockTurtle;
-import dan200.computercraft.shared.turtle.items.ItemTurtleAdvanced;
-import dan200.computercraft.shared.turtle.items.ItemTurtleLegacy;
-import dan200.computercraft.shared.turtle.items.ItemTurtleNormal;
+import dan200.computercraft.shared.turtle.items.ItemTurtle;
 import dan200.computercraft.shared.turtle.upgrades.*;
-import dan200.computercraft.shared.util.CreativeTabMain;
-import dan200.computercraft.shared.util.IDAssigner;
-import dan200.computercraft.shared.util.IoUtil;
-import dan200.computercraft.shared.wired.CapabilityWiredElement;
-import dan200.computercraft.shared.wired.WiredNode;
-import net.minecraft.entity.player.EntityPlayer;
-import net.minecraft.item.ItemBlock;
-import net.minecraft.item.ItemStack;
-import net.minecraft.server.MinecraftServer;
-import net.minecraft.tileentity.TileEntity;
-import net.minecraft.util.EnumFacing;
-import net.minecraft.util.math.BlockPos;
-import net.minecraft.world.IBlockAccess;
-import net.minecraft.world.World;
-import net.minecraftforge.common.DimensionManager;
-import net.minecraftforge.fml.common.*;
-import net.minecraftforge.fml.common.event.*;
-import net.minecraftforge.fml.relauncher.Side;
+import net.minecraft.resources.IReloadableResourceManager;
+import net.minecraft.util.ResourceLocation;
+import net.minecraftforge.fml.common.Mod;
+import net.minecraftforge.fml.server.ServerLifecycleHooks;
+import org.apache.logging.log4j.LogManager;
 import org.apache.logging.log4j.Logger;
 
-import java.io.*;
-import java.net.MalformedURLException;
-import java.net.URISyntaxException;
-import java.net.URL;
-import java.util.*;
+import java.io.IOException;
+import java.io.InputStream;
+import java.util.EnumSet;
 import java.util.concurrent.TimeUnit;
-import java.util.zip.ZipEntry;
-import java.util.zip.ZipFile;
 
-@Mod(
-    modid = ComputerCraft.MOD_ID, name = ComputerCraft.NAME, version = ComputerCraft.VERSION,
-    guiFactory = "dan200.computercraft.client.gui.GuiConfigCC$Factory",
-    dependencies = "required:forge@[14.23.4.2746,)"
-)
-public class ComputerCraft
+@Mod( ComputerCraft.MOD_ID )
+public final class ComputerCraft
 {
     public static final String MOD_ID = "computercraft";
-    static final String VERSION = "${version}";
-    static final String NAME = "CC: Tweaked";
+
+    public static final int DATAFIXER_VERSION = 0;
 
     // Configuration options
     public static final String[] DEFAULT_HTTP_WHITELIST = new String[] { "*" };
@@ -156,46 +110,54 @@ public class ComputerCraft
     // Blocks and Items
     public static final class Blocks
     {
-        public static BlockComputer computer;
-        public static BlockCommandComputer commandComputer;
+        public static BlockComputer computerNormal;
+        public static BlockComputer computerAdvanced;
+        public static BlockComputer computerCommand;
 
-        public static BlockTurtle turtle;
-        public static BlockTurtle turtleExpanded;
+        public static BlockTurtle turtleNormal;
         public static BlockTurtle turtleAdvanced;
 
-        public static BlockPeripheral peripheral;
-        public static BlockCable cable;
-        public static BlockAdvancedModem advancedModem;
+        public static BlockSpeaker speaker;
+        public static BlockDiskDrive diskDrive;
+        public static BlockPrinter printer;
+
+        public static BlockMonitor monitorNormal;
+        public static BlockMonitor monitorAdvanced;
+
+        public static BlockWirelessModem wirelessModemNormal;
+        public static BlockWirelessModem wirelessModemAdvanced;
+
         public static BlockWiredModemFull wiredModemFull;
+        public static BlockCable cable;
     }
 
     public static final class Items
     {
-        public static ItemComputer computer;
-        public static ItemCommandComputer commandComputer;
+        public static ItemComputer computerNormal;
+        public static ItemComputer computerAdvanced;
+        public static ItemComputer computerCommand;
 
-        public static ItemTurtleLegacy turtle;
-        public static ItemTurtleNormal turtleExpanded;
-        public static ItemTurtleAdvanced turtleAdvanced;
+        public static ItemPocketComputer pocketComputerNormal;
+        public static ItemPocketComputer pocketComputerAdvanced;
 
-        public static ItemPocketComputer pocketComputer;
+        public static ItemTurtle turtleNormal;
+        public static ItemTurtle turtleAdvanced;
 
-        public static ItemDiskLegacy disk;
-        public static ItemDiskExpanded diskExpanded;
+        public static ItemDisk disk;
         public static ItemTreasureDisk treasureDisk;
 
-        public static ItemPrintout printout;
+        public static ItemPrintout printedPage;
+        public static ItemPrintout printedPages;
+        public static ItemPrintout printedBook;
 
-        public static ItemPeripheral peripheral;
-        public static ItemAdvancedModem advancedModem;
-        public static ItemCable cable;
-        public static ItemBlock wiredModemFull;
+        public static ItemBlockCable.Cable cable;
+        public static ItemBlockCable.WiredModem wiredModem;
     }
 
     public static final class TurtleUpgrades
     {
-        public static TurtleModem wirelessModem;
-        public static TurtleModem advancedModem;
+        public static TurtleModem wirelessModemNormal;
+        public static TurtleModem wirelessModemAdvanced;
         public static TurtleSpeaker speaker;
 
         public static TurtleCraftingTable craftingTable;
@@ -208,457 +170,38 @@ public class ComputerCraft
 
     public static final class PocketUpgrades
     {
-        public static PocketModem wirelessModem;
-        public static PocketModem advancedModem;
+        public static PocketModem wirelessModemNormal;
+        public static PocketModem wirelessModemAdvanced;
         public static PocketSpeaker speaker;
-
-        @Deprecated
-        public static PocketSpeaker pocketSpeaker;
-    }
-
-    @Deprecated
-    public static final class Upgrades
-    {
-        public static TurtleModem advancedModem;
     }
 
     // Registries
     public static final ClientComputerRegistry clientComputerRegistry = new ClientComputerRegistry();
     public static final ServerComputerRegistry serverComputerRegistry = new ServerComputerRegistry();
 
-    // Creative
-    public static CreativeTabMain mainCreativeTab;
-
     // Logging
-    public static Logger log;
+    public static final Logger log = LogManager.getLogger( MOD_ID );
 
-    // Peripheral providers. This is still here to ensure compatibility with Plethora and Computronics
-    public static List<IPeripheralProvider> peripheralProviders = new ArrayList<>();
-
-    // Implementation
-    @Mod.Instance( ComputerCraft.MOD_ID )
-    public static ComputerCraft instance;
-
-    @SidedProxy(
-        clientSide = "dan200.computercraft.client.proxy.ComputerCraftProxyClient",
-        serverSide = "dan200.computercraft.shared.proxy.ComputerCraftProxyCommon"
-    )
-    private static ComputerCraftProxyCommon proxy;
-
-    @Mod.EventHandler
-    public void preInit( FMLPreInitializationEvent event )
+    public ComputerCraft()
     {
-        log = event.getModLog();
-
-        // Load config
-        Config.load( event.getSuggestedConfigurationFile() );
-
-        proxy.preInit();
-    }
-
-    @Mod.EventHandler
-    public void init( FMLInitializationEvent event )
-    {
-        proxy.init();
-    }
-
-    @Mod.EventHandler
-    public void onServerStarting( FMLServerStartingEvent event )
-    {
-        ComputerCraftProxyCommon.initServer( event.getServer() );
-    }
-
-    @Mod.EventHandler
-    public void onServerStart( FMLServerStartedEvent event )
-    {
-        if( FMLCommonHandler.instance().getEffectiveSide() == Side.SERVER )
-        {
-            ComputerCraft.serverComputerRegistry.reset();
-            WirelessNetwork.resetNetworks();
-            MainThread.reset();
-            Tracking.reset();
-        }
-    }
-
-    @Mod.EventHandler
-    public void onServerStopped( FMLServerStoppedEvent event )
-    {
-        if( FMLCommonHandler.instance().getEffectiveSide() == Side.SERVER )
-        {
-            ComputerCraft.serverComputerRegistry.reset();
-            WirelessNetwork.resetNetworks();
-            MainThread.reset();
-            Tracking.reset();
-        }
+        Config.load();
     }
 
     public static String getVersion()
     {
-        return VERSION;
+        return "${version}";
     }
 
-    private static File getBaseDir()
-    {
-        return FMLCommonHandler.instance().getMinecraftServerInstance().getDataDirectory();
-    }
-
-    private static File getResourcePackDir()
-    {
-        return new File( getBaseDir(), "resourcepacks" );
-    }
-
-    @Deprecated
-    public static void registerPermissionProvider( ITurtlePermissionProvider provider )
-    {
-        TurtlePermissions.register( provider );
-    }
-
-    @Deprecated
-    public static void registerPocketUpgrade( IPocketUpgrade upgrade )
-    {
-        dan200.computercraft.shared.PocketUpgrades.register( upgrade );
-    }
-
-    @Deprecated
-    public static void registerPeripheralProvider( IPeripheralProvider provider )
-    {
-        Peripherals.register( provider );
-    }
-
-    @Deprecated
-    public static void registerBundledRedstoneProvider( IBundledRedstoneProvider provider )
-    {
-        BundledRedstone.register( provider );
-    }
-
-    @Deprecated
-    public static void registerMediaProvider( IMediaProvider provider )
-    {
-        MediaProviders.register( provider );
-    }
-
-    @Deprecated
-    public static void registerAPIFactory( ILuaAPIFactory factory )
-    {
-        ApiFactories.register( factory );
-    }
-
-    @Deprecated
-    public static IWiredNode createWiredNodeForElement( IWiredElement element )
-    {
-        return new WiredNode( element );
-    }
-
-    @Deprecated
-    public static IWiredElement getWiredElementAt( IBlockAccess world, BlockPos pos, EnumFacing side )
-    {
-        TileEntity tile = world.getTileEntity( pos );
-        return tile != null && tile.hasCapability( CapabilityWiredElement.CAPABILITY, side )
-            ? tile.getCapability( CapabilityWiredElement.CAPABILITY, side )
-            : null;
-    }
-
-    @Deprecated
-    public static int getDefaultBundledRedstoneOutput( World world, BlockPos pos, EnumFacing side )
-    {
-        return BundledRedstone.getDefaultOutput( world, pos, side );
-    }
-
-    @Deprecated
-    public static IPacketNetwork getWirelessNetwork()
-    {
-        return WirelessNetwork.getUniversal();
-    }
-
-    @Deprecated
-    public static int createUniqueNumberedSaveDir( World world, String parentSubPath )
-    {
-        return IDAssigner.getNextIDFromDirectory( parentSubPath );
-    }
-
-    @Deprecated
-    public static IWritableMount createSaveDirMount( World world, String subPath, long capacity )
+    public static InputStream getResourceFile( String domain, String subPath )
     {
+        IReloadableResourceManager manager = ServerLifecycleHooks.getCurrentServer().getResourceManager();
         try
         {
-            return new FileMount( new File( getWorldDir(), subPath ), capacity );
+            return manager.getResource( new ResourceLocation( domain, subPath ) ).getInputStream();
         }
-        catch( Exception e )
+        catch( IOException ignored )
         {
             return null;
         }
     }
-
-    private static void loadFromFile( List<IMount> mounts, File file, String path, boolean allowMissing )
-    {
-        try
-        {
-            if( file.isFile() )
-            {
-                mounts.add( new JarMount( file, path ) );
-            }
-            else
-            {
-                File subResource = new File( file, path );
-                if( subResource.exists() ) mounts.add( new FileMount( subResource, 0 ) );
-            }
-        }
-        catch( IOException | RuntimeException e )
-        {
-            if( allowMissing && e instanceof FileNotFoundException ) return;
-            ComputerCraft.log.error( "Could not load mount '" + path + " 'from '" + file.getName() + "'", e );
-        }
-    }
-
-    @Deprecated
-    public static IMount createResourceMount( Class<?> modClass, String domain, String subPath )
-    {
-        // Start building list of mounts
-        List<IMount> mounts = new ArrayList<>();
-        subPath = "assets/" + domain + "/" + subPath;
-
-        // Mount from debug dir
-        File codeDir = getDebugCodeDir( modClass );
-        if( codeDir != null )
-        {
-            File subResource = new File( codeDir, subPath );
-            if( subResource.exists() )
-            {
-                IMount resourcePackMount = new FileMount( subResource, 0 );
-                mounts.add( resourcePackMount );
-            }
-        }
-
-        // Mount from mod jars, preferring the specified one.
-        File modJar = getContainingJar( modClass );
-        Set<File> otherMods = new HashSet<>();
-        for( ModContainer container : Loader.instance().getActiveModList() )
-        {
-            File modFile = container.getSource();
-            if( modFile != null && !modFile.equals( modJar ) && modFile.exists() )
-            {
-                otherMods.add( container.getSource() );
-            }
-        }
-
-        for( File file : otherMods )
-        {
-            loadFromFile( mounts, file, subPath, true );
-        }
-
-        if( modJar != null )
-        {
-            loadFromFile( mounts, modJar, subPath, false );
-        }
-
-        // Mount from resource packs
-        File resourcePackDir = getResourcePackDir();
-        if( resourcePackDir.exists() && resourcePackDir.isDirectory() )
-        {
-            String[] resourcePacks = resourcePackDir.list();
-            for( String resourcePackName : resourcePacks )
-            {
-                File resourcePack = new File( resourcePackDir, resourcePackName );
-                loadFromFile( mounts, resourcePack, subPath, true );
-            }
-        }
-
-        // Return the combination of all the mounts found
-        if( mounts.size() >= 2 )
-        {
-            IMount[] mountArray = new IMount[mounts.size()];
-            mounts.toArray( mountArray );
-            return new ComboMount( mountArray );
-        }
-        else if( mounts.size() == 1 )
-        {
-            return mounts.get( 0 );
-        }
-        else
-        {
-            return null;
-        }
-    }
-
-    public static InputStream getResourceFile( Class<?> modClass, String domain, String subPath )
-    {
-        // Start searching in possible locations
-        subPath = "assets/" + domain + "/" + subPath;
-
-        // Look in resource packs
-        File resourcePackDir = getResourcePackDir();
-        if( resourcePackDir.exists() && resourcePackDir.isDirectory() )
-        {
-            String[] resourcePacks = resourcePackDir.list();
-            for( String resourcePackPath : resourcePacks )
-            {
-                File resourcePack = new File( resourcePackDir, resourcePackPath );
-                if( resourcePack.isDirectory() )
-                {
-                    // Mount a resource pack from a folder
-                    File subResource = new File( resourcePack, subPath );
-                    if( subResource.exists() && subResource.isFile() )
-                    {
-                        try
-                        {
-                            return new FileInputStream( subResource );
-                        }
-                        catch( FileNotFoundException ignored )
-                        {
-                        }
-                    }
-                }
-                else
-                {
-                    ZipFile zipFile = null;
-                    try
-                    {
-                        final ZipFile zip = zipFile = new ZipFile( resourcePack );
-                        ZipEntry entry = zipFile.getEntry( subPath );
-                        if( entry != null )
-                        {
-                            // Return a custom InputStream which will close the original zip when finished.
-                            return new FilterInputStream( zipFile.getInputStream( entry ) )
-                            {
-                                @Override
-                                public void close() throws IOException
-                                {
-                                    super.close();
-                                    zip.close();
-                                }
-                            };
-                        }
-                        else
-                        {
-                            IoUtil.closeQuietly( zipFile );
-                        }
-                    }
-                    catch( IOException e )
-                    {
-                        if( zipFile != null ) IoUtil.closeQuietly( zipFile );
-                    }
-                }
-            }
-        }
-
-        // Look in debug dir
-        File codeDir = getDebugCodeDir( modClass );
-        if( codeDir != null )
-        {
-            File subResource = new File( codeDir, subPath );
-            if( subResource.exists() && subResource.isFile() )
-            {
-                try
-                {
-                    return new FileInputStream( subResource );
-                }
-                catch( FileNotFoundException ignored )
-                {
-                }
-            }
-        }
-
-        // Look in class loader
-        return modClass.getClassLoader().getResourceAsStream( subPath );
-    }
-
-    private static File getContainingJar( Class<?> modClass )
-    {
-        String path = modClass.getProtectionDomain().getCodeSource().getLocation().getPath();
-        int bangIndex = path.indexOf( '!' );
-        if( bangIndex >= 0 )
-        {
-            path = path.substring( 0, bangIndex );
-        }
-
-        URL url;
-        try
-        {
-            url = new URL( path );
-        }
-        catch( MalformedURLException e1 )
-        {
-            return null;
-        }
-
-        File file;
-        try
-        {
-            file = new File( url.toURI() );
-        }
-        catch( URISyntaxException e )
-        {
-            file = new File( url.getPath() );
-        }
-        return file;
-    }
-
-    private static File getDebugCodeDir( Class<?> modClass )
-    {
-        String path = modClass.getProtectionDomain().getCodeSource().getLocation().getPath();
-        int bangIndex = path.indexOf( '!' );
-        return bangIndex >= 0 ? null : new File( new File( path ).getParentFile(), "../.." );
-    }
-
-    @Deprecated
-    public static void registerTurtleUpgrade( ITurtleUpgrade upgrade )
-    {
-        dan200.computercraft.shared.TurtleUpgrades.register( upgrade );
-    }
-
-    public static File getWorldDir()
-    {
-        return DimensionManager.getCurrentSaveRootDirectory();
-    }
-
-    //region Compatibility
-    @Deprecated
-    public static File getWorldDir( World world )
-    {
-        return DimensionManager.getCurrentSaveRootDirectory();
-    }
-
-    @Deprecated
-    public static IMedia getMedia( ItemStack stack )
-    {
-        return MediaProviders.get( stack );
-    }
-
-    @Deprecated
-    public static IPocketUpgrade getPocketUpgrade( ItemStack stack )
-    {
-        return dan200.computercraft.shared.PocketUpgrades.get( stack );
-    }
-
-    @Deprecated
-    public static ITurtleUpgrade getTurtleUpgrade( ItemStack stack )
-    {
-        return dan200.computercraft.shared.TurtleUpgrades.get( stack );
-    }
-
-    @Deprecated
-    public static IPocketUpgrade getPocketUpgrade( String id )
-    {
-        return dan200.computercraft.shared.PocketUpgrades.get( id );
-    }
-
-    @Deprecated
-    public static ITurtleUpgrade getTurtleUpgrade( String id )
-    {
-        return dan200.computercraft.shared.TurtleUpgrades.get( id );
-    }
-
-    @Deprecated
-    public static IPeripheral getPeripheralAt( World world, BlockPos pos, EnumFacing side )
-    {
-        return Peripherals.getPeripheral( world, pos, side );
-    }
-
-    @Deprecated
-    public static boolean canPlayerUseCommands( EntityPlayer player )
-    {
-        MinecraftServer server = player.getServer();
-        return server != null && server.getPlayerList().canSendCommands( player.getGameProfile() );
-    }
-    //endregion
 }

src/main/java/dan200/computercraft/ComputerCraftAPIImpl.java

@@ -0,0 +1,153 @@
+/*
+ * This file is part of ComputerCraft - http://www.computercraft.info
+ * Copyright Daniel Ratcliffe, 2011-2019. Do not distribute without permission.
+ * Send enquiries to dratcliffe@gmail.com
+ */
+
+package dan200.computercraft;
+
+import com.google.common.collect.MapMaker;
+import dan200.computercraft.api.ComputerCraftAPI.IComputerCraftAPI;
+import dan200.computercraft.api.filesystem.IMount;
+import dan200.computercraft.api.filesystem.IWritableMount;
+import dan200.computercraft.api.lua.ILuaAPIFactory;
+import dan200.computercraft.api.media.IMediaProvider;
+import dan200.computercraft.api.network.IPacketNetwork;
+import dan200.computercraft.api.network.wired.IWiredElement;
+import dan200.computercraft.api.network.wired.IWiredNode;
+import dan200.computercraft.api.peripheral.IPeripheralProvider;
+import dan200.computercraft.api.pocket.IPocketUpgrade;
+import dan200.computercraft.api.redstone.IBundledRedstoneProvider;
+import dan200.computercraft.api.turtle.ITurtleUpgrade;
+import dan200.computercraft.core.apis.ApiFactories;
+import dan200.computercraft.core.filesystem.FileMount;
+import dan200.computercraft.core.filesystem.ResourceMount;
+import dan200.computercraft.shared.*;
+import dan200.computercraft.shared.peripheral.modem.wireless.WirelessNetwork;
+import dan200.computercraft.shared.util.IDAssigner;
+import dan200.computercraft.shared.wired.CapabilityWiredElement;
+import dan200.computercraft.shared.wired.WiredNode;
+import net.minecraft.resources.IReloadableResourceManager;
+import net.minecraft.tileentity.TileEntity;
+import net.minecraft.util.Direction;
+import net.minecraft.util.ResourceLocation;
+import net.minecraft.util.math.BlockPos;
+import net.minecraft.world.IBlockReader;
+import net.minecraft.world.World;
+import net.minecraftforge.common.util.LazyOptional;
+import net.minecraftforge.fml.server.ServerLifecycleHooks;
+
+import javax.annotation.Nonnull;
+import java.io.File;
+import java.lang.ref.WeakReference;
+import java.util.Map;
+
+public final class ComputerCraftAPIImpl implements IComputerCraftAPI
+{
+    public static final ComputerCraftAPIImpl INSTANCE = new ComputerCraftAPIImpl();
+
+    private ComputerCraftAPIImpl()
+    {
+    }
+
+    private WeakReference<IReloadableResourceManager> currentResources;
+    private final Map<ResourceLocation, ResourceMount> mountCache = new MapMaker().weakValues().concurrencyLevel( 1 ).makeMap();
+
+    @Nonnull
+    @Override
+    public String getInstalledVersion()
+    {
+        return "${version}";
+    }
+
+    @Override
+    public int createUniqueNumberedSaveDir( @Nonnull World world, @Nonnull String parentSubPath )
+    {
+        return IDAssigner.getNextId( parentSubPath );
+    }
+
+    @Override
+    public IWritableMount createSaveDirMount( @Nonnull World world, @Nonnull String subPath, long capacity )
+    {
+        try
+        {
+            return new FileMount( new File( IDAssigner.getDir(), subPath ), capacity );
+        }
+        catch( Exception e )
+        {
+            return null;
+        }
+    }
+
+    @Override
+    public IMount createResourceMount( @Nonnull String domain, @Nonnull String subPath )
+    {
+        IReloadableResourceManager manager = ServerLifecycleHooks.getCurrentServer().getResourceManager();
+        ResourceMount mount = ResourceMount.get( domain, subPath, manager );
+        return mount.exists( "" ) ? mount : null;
+    }
+
+    @Override
+    public void registerPeripheralProvider( @Nonnull IPeripheralProvider provider )
+    {
+        Peripherals.register( provider );
+    }
+
+    @Override
+    public void registerTurtleUpgrade( @Nonnull ITurtleUpgrade upgrade )
+    {
+        TurtleUpgrades.register( upgrade );
+    }
+
+    @Override
+    public void registerBundledRedstoneProvider( @Nonnull IBundledRedstoneProvider provider )
+    {
+        BundledRedstone.register( provider );
+    }
+
+    @Override
+    public int getBundledRedstoneOutput( @Nonnull World world, @Nonnull BlockPos pos, @Nonnull Direction side )
+    {
+        return BundledRedstone.getDefaultOutput( world, pos, side );
+    }
+
+    @Override
+    public void registerMediaProvider( @Nonnull IMediaProvider provider )
+    {
+        MediaProviders.register( provider );
+    }
+
+    @Override
+    public void registerPocketUpgrade( @Nonnull IPocketUpgrade upgrade )
+    {
+        PocketUpgrades.register( upgrade );
+    }
+
+    @Nonnull
+    @Override
+    public IPacketNetwork getWirelessNetwork()
+    {
+        return WirelessNetwork.getUniversal();
+    }
+
+    @Override
+    public void registerAPIFactory( @Nonnull ILuaAPIFactory factory )
+    {
+        ApiFactories.register( factory );
+    }
+
+    @Nonnull
+    @Override
+    public IWiredNode createWiredNodeForElement( @Nonnull IWiredElement element )
+    {
+        return new WiredNode( element );
+    }
+
+    @Nonnull
+    @Override
+    public LazyOptional<IWiredElement> getWiredElementAt( @Nonnull IBlockReader world, @Nonnull BlockPos pos, @Nonnull Direction side )
+    {
+        TileEntity tile = world.getTileEntity( pos );
+        return tile == null ? LazyOptional.empty() : tile.getCapability( CapabilityWiredElement.CAPABILITY, side );
+    }
+}

src/main/java/dan200/computercraft/api/AbstractTurtleUpgrade.java

@@ -1,16 +1,16 @@
 /*
  * This file is part of the public ComputerCraft API - http://www.computercraft.info
- * Copyright Daniel Ratcliffe, 2011-2020. This API may be redistributed unmodified and in full only.
+ * Copyright Daniel Ratcliffe, 2011-2019. This API may be redistributed unmodified and in full only.
  * For help using the API, and posting your mods, visit the forums at computercraft.info.
  */
 package dan200.computercraft.api;
 
 import dan200.computercraft.api.turtle.ITurtleUpgrade;
 import dan200.computercraft.api.turtle.TurtleUpgradeType;
-import net.minecraft.block.Block;
-import net.minecraft.item.Item;
 import net.minecraft.item.ItemStack;
+import net.minecraft.util.IItemProvider;
 import net.minecraft.util.ResourceLocation;
+import net.minecraft.util.Util;
 
 import javax.annotation.Nonnull;
 
@@ -22,43 +22,31 @@ import javax.annotation.Nonnull;
 public abstract class AbstractTurtleUpgrade implements ITurtleUpgrade
 {
     private final ResourceLocation id;
-    private final int legacyId;
     private final TurtleUpgradeType type;
     private final String adjective;
     private final ItemStack stack;
 
-    protected AbstractTurtleUpgrade( ResourceLocation id, int legacyId, TurtleUpgradeType type, String adjective, ItemStack stack )
+    protected AbstractTurtleUpgrade( ResourceLocation id, TurtleUpgradeType type, String adjective, ItemStack stack )
     {
         this.id = id;
-        this.legacyId = legacyId;
         this.type = type;
         this.adjective = adjective;
         this.stack = stack;
     }
 
-    protected AbstractTurtleUpgrade( ResourceLocation id, int legacyId, TurtleUpgradeType type, String adjective, Item item )
+    protected AbstractTurtleUpgrade( ResourceLocation id, TurtleUpgradeType type, String adjective, IItemProvider item )
     {
-        this( id, legacyId, type, adjective, new ItemStack( item ) );
+        this( id, type, adjective, new ItemStack( item ) );
     }
 
-    protected AbstractTurtleUpgrade( ResourceLocation id, int legacyId, TurtleUpgradeType type, String adjective, Block block )
+    protected AbstractTurtleUpgrade( ResourceLocation id, TurtleUpgradeType type, ItemStack stack )
     {
-        this( id, legacyId, type, adjective, new ItemStack( block ) );
+        this( id, type, Util.makeTranslationKey( "upgrade", id ) + ".adjective", stack );
     }
 
-    protected AbstractTurtleUpgrade( ResourceLocation id, int legacyId, TurtleUpgradeType type, ItemStack stack )
+    protected AbstractTurtleUpgrade( ResourceLocation id, TurtleUpgradeType type, IItemProvider item )
     {
-        this( id, legacyId, type, "upgrade." + id + ".adjective", stack );
-    }
-
-    protected AbstractTurtleUpgrade( ResourceLocation id, int legacyId, TurtleUpgradeType type, Item item )
-    {
-        this( id, legacyId, type, new ItemStack( item ) );
-    }
-
-    protected AbstractTurtleUpgrade( ResourceLocation id, int legacyId, TurtleUpgradeType type, Block block )
-    {
-        this( id, legacyId, type, new ItemStack( block ) );
+        this( id, type, new ItemStack( item ) );
     }
 
     @Nonnull
@@ -68,12 +56,6 @@ public abstract class AbstractTurtleUpgrade implements ITurtleUpgrade
         return id;
     }
 
-    @Override
-    public final int getLegacyUpgradeID()
-    {
-        return legacyId;
-    }
-
     @Nonnull
     @Override
     public final String getUnlocalisedAdjective()

src/main/java/dan200/computercraft/api/ComputerCraftAPI.java

@@ -1,8 +1,9 @@
 /*
  * This file is part of the public ComputerCraft API - http://www.computercraft.info
- * Copyright Daniel Ratcliffe, 2011-2020. This API may be redistributed unmodified and in full only.
+ * Copyright Daniel Ratcliffe, 2011-2019. This API may be redistributed unmodified and in full only.
  * For help using the API, and posting your mods, visit the forums at computercraft.info.
  */
+
 package dan200.computercraft.api;
 
 import dan200.computercraft.api.filesystem.IMount;
@@ -16,18 +17,17 @@ import dan200.computercraft.api.network.wired.IWiredNode;
 import dan200.computercraft.api.peripheral.IComputerAccess;
 import dan200.computercraft.api.peripheral.IPeripheral;
 import dan200.computercraft.api.peripheral.IPeripheralProvider;
-import dan200.computercraft.api.permissions.ITurtlePermissionProvider;
 import dan200.computercraft.api.pocket.IPocketUpgrade;
 import dan200.computercraft.api.redstone.IBundledRedstoneProvider;
 import dan200.computercraft.api.turtle.ITurtleUpgrade;
-import net.minecraft.util.EnumFacing;
+import net.minecraft.util.Direction;
 import net.minecraft.util.math.BlockPos;
-import net.minecraft.world.IBlockAccess;
+import net.minecraft.world.IBlockReader;
 import net.minecraft.world.World;
+import net.minecraftforge.common.util.LazyOptional;
 
 import javax.annotation.Nonnull;
 import javax.annotation.Nullable;
-import java.lang.reflect.Method;
 
 /**
  * The static entry point to the ComputerCraft API.
@@ -37,28 +37,10 @@ import java.lang.reflect.Method;
  */
 public final class ComputerCraftAPI
 {
-    public static boolean isInstalled()
-    {
-        findCC();
-        return computerCraft != null;
-    }
-
     @Nonnull
     public static String getInstalledVersion()
     {
-        findCC();
-        if( computerCraft_getVersion != null )
-        {
-            try
-            {
-                return (String) computerCraft_getVersion.invoke( null );
-            }
-            catch( Exception e )
-            {
-                // It failed
-            }
-        }
-        return "";
+        return getInstance().getInstalledVersion();
     }
 
     @Nonnull
@@ -82,19 +64,7 @@ public final class ComputerCraftAPI
      */
     public static int createUniqueNumberedSaveDir( @Nonnull World world, @Nonnull String parentSubPath )
     {
-        findCC();
-        if( computerCraft_createUniqueNumberedSaveDir != null )
-        {
-            try
-            {
-                return (Integer) computerCraft_createUniqueNumberedSaveDir.invoke( null, world, parentSubPath );
-            }
-            catch( Exception e )
-            {
-                // It failed
-            }
-        }
-        return -1;
+        return getInstance().createUniqueNumberedSaveDir( world, parentSubPath );
     }
 
     /**
@@ -118,55 +88,54 @@ public final class ComputerCraftAPI
     @Nullable
     public static IWritableMount createSaveDirMount( @Nonnull World world, @Nonnull String subPath, long capacity )
     {
-        findCC();
-        if( computerCraft_createSaveDirMount != null )
-        {
-            try
-            {
-                return (IWritableMount) computerCraft_createSaveDirMount.invoke( null, world, subPath, capacity );
-            }
-            catch( Exception e )
-            {
-                // It failed
-            }
-        }
-        return null;
+        return getInstance().createSaveDirMount( world, subPath, capacity );
     }
 
     /**
      * Creates a file system mount to a resource folder, and returns it.
      *
-     * Use in conjunction with IComputerAccess.mount() or IComputerAccess.mountWritable() to mount a resource folder
-     * onto a computer's file system.
+     * Use in conjunction with {@link IComputerAccess#mount} or {@link IComputerAccess#mountWritable} to mount a
+     * resource folder onto a computer's file system.
      *
-     * The files in this mount will be a combination of files in the specified mod jar, and resource packs that contain
+     * The files in this mount will be a combination of files in all mod jar, and data packs that contain
      * resources with the same domain and path.
      *
-     * @param modClass A class in whose jar to look first for the resources to mount. Using your main mod class is recommended. eg: MyMod.class
-     * @param domain   The domain under which to look for resources. eg: "mymod".
-     * @param subPath  The domain under which to look for resources. eg: "mymod/lua/myfiles".
-     * @return The mount, or {@code null} if it could be created for some reason. Use IComputerAccess.mount() or
-     * IComputerAccess.mountWritable() to mount this on a Computers' file system.
+     * @param domain  The domain under which to look for resources. eg: "mymod".
+     * @param subPath The subPath under which to look for resources. eg: "lua/myfiles".
+     * @return The mount, or {@code null} if it could be created for some reason.
      * @see IComputerAccess#mount(String, IMount)
      * @see IComputerAccess#mountWritable(String, IWritableMount)
      * @see IMount
      */
     @Nullable
-    public static IMount createResourceMount( @Nonnull Class<?> modClass, @Nonnull String domain, @Nonnull String subPath )
+    public static IMount createResourceMount( @Nonnull String domain, @Nonnull String subPath )
     {
-        findCC();
-        if( computerCraft_createResourceMount != null )
-        {
-            try
-            {
-                return (IMount) computerCraft_createResourceMount.invoke( null, modClass, domain, subPath );
-            }
-            catch( Exception e )
-            {
-                // It failed
-            }
-        }
-        return null;
+        return getInstance().createResourceMount( domain, subPath );
+    }
+
+    /**
+     * Creates a file system mount to a resource folder, and returns it.
+     *
+     * Use in conjunction with {@link IComputerAccess#mount} or {@link IComputerAccess#mountWritable} to mount a
+     * resource folder onto a computer's file system.
+     *
+     * The files in this mount will be a combination of files in all mod jar, and data packs that contain
+     * resources with the same domain and path.
+     *
+     * @param klass   The mod class to which the files belong.
+     * @param domain  The domain under which to look for resources. eg: "mymod".
+     * @param subPath The subPath under which to look for resources. eg: "lua/myfiles".
+     * @return The mount, or {@code null} if it could be created for some reason.
+     * @see IComputerAccess#mount(String, IMount)
+     * @see IComputerAccess#mountWritable(String, IWritableMount)
+     * @see IMount
+     * @deprecated Use {@link #createResourceMount(String, String)} instead.
+     */
+    @Nullable
+    @Deprecated
+    public static IMount createResourceMount( Class<?> klass, @Nonnull String domain, @Nonnull String subPath )
+    {
+        return getInstance().createResourceMount( domain, subPath );
     }
 
     /**
@@ -178,18 +147,7 @@ public final class ComputerCraftAPI
      */
     public static void registerPeripheralProvider( @Nonnull IPeripheralProvider provider )
     {
-        findCC();
-        if( computerCraft_registerPeripheralProvider != null )
-        {
-            try
-            {
-                computerCraft_registerPeripheralProvider.invoke( null, provider );
-            }
-            catch( Exception e )
-            {
-                // It failed
-            }
-        }
+        getInstance().registerPeripheralProvider( provider );
     }
 
     /**
@@ -202,21 +160,7 @@ public final class ComputerCraftAPI
      */
     public static void registerTurtleUpgrade( @Nonnull ITurtleUpgrade upgrade )
     {
-        if( upgrade != null )
-        {
-            findCC();
-            if( computerCraft_registerTurtleUpgrade != null )
-            {
-                try
-                {
-                    computerCraft_registerTurtleUpgrade.invoke( null, upgrade );
-                }
-                catch( Exception e )
-                {
-                    // It failed
-                }
-            }
-        }
+        getInstance().registerTurtleUpgrade( upgrade );
     }
 
     /**
@@ -227,18 +171,7 @@ public final class ComputerCraftAPI
      */
     public static void registerBundledRedstoneProvider( @Nonnull IBundledRedstoneProvider provider )
     {
-        findCC();
-        if( computerCraft_registerBundledRedstoneProvider != null )
-        {
-            try
-            {
-                computerCraft_registerBundledRedstoneProvider.invoke( null, provider );
-            }
-            catch( Exception e )
-            {
-                // It failed
-            }
-        }
+        getInstance().registerBundledRedstoneProvider( provider );
     }
 
     /**
@@ -251,21 +184,9 @@ public final class ComputerCraftAPI
      * If there is no block capable of emitting bundled redstone at the location, -1 will be returned.
      * @see IBundledRedstoneProvider
      */
-    public static int getBundledRedstoneOutput( @Nonnull World world, @Nonnull BlockPos pos, @Nonnull EnumFacing side )
+    public static int getBundledRedstoneOutput( @Nonnull World world, @Nonnull BlockPos pos, @Nonnull Direction side )
     {
-        findCC();
-        if( computerCraft_getDefaultBundledRedstoneOutput != null )
-        {
-            try
-            {
-                return (Integer) computerCraft_getDefaultBundledRedstoneOutput.invoke( null, world, pos, side );
-            }
-            catch( Exception e )
-            {
-                // It failed
-            }
-        }
-        return -1;
+        return getInstance().getBundledRedstoneOutput( world, pos, side );
     }
 
     /**
@@ -276,58 +197,12 @@ public final class ComputerCraftAPI
      */
     public static void registerMediaProvider( @Nonnull IMediaProvider provider )
     {
-        findCC();
-        if( computerCraft_registerMediaProvider != null )
-        {
-            try
-            {
-                computerCraft_registerMediaProvider.invoke( null, provider );
-            }
-            catch( Exception e )
-            {
-                // It failed
-            }
-        }
-    }
-
-    /**
-     * Registers a permission provider to restrict where turtles can move or build.
-     *
-     * @param provider The turtle permission provider to register.
-     * @see ITurtlePermissionProvider
-     * @deprecated Prefer using {@link dan200.computercraft.api.turtle.event.TurtleBlockEvent} or the standard Forge events.
-     */
-    @Deprecated
-    public static void registerPermissionProvider( @Nonnull ITurtlePermissionProvider provider )
-    {
-        findCC();
-        if( computerCraft_registerPermissionProvider != null )
-        {
-            try
-            {
-                computerCraft_registerPermissionProvider.invoke( null, provider );
-            }
-            catch( Exception e )
-            {
-                // It failed
-            }
-        }
+        getInstance().registerMediaProvider( provider );
     }
 
     public static void registerPocketUpgrade( @Nonnull IPocketUpgrade upgrade )
     {
-        findCC();
-        if( computerCraft_registerPocketUpgrade != null )
-        {
-            try
-            {
-                computerCraft_registerPocketUpgrade.invoke( null, upgrade );
-            }
-            catch( Exception e )
-            {
-                // It failed
-            }
-        }
+        getInstance().registerPocketUpgrade( upgrade );
     }
 
     /**
@@ -337,36 +212,12 @@ public final class ComputerCraftAPI
      */
     public static IPacketNetwork getWirelessNetwork()
     {
-        findCC();
-        if( computerCraft_getWirelessNetwork != null )
-        {
-            try
-            {
-                return (IPacketNetwork) computerCraft_getWirelessNetwork.invoke( null );
-            }
-            catch( Exception e )
-            {
-                // It failed;
-            }
-        }
-
-        return null;
+        return getInstance().getWirelessNetwork();
     }
 
-    public static void registerAPIFactory( @Nonnull ILuaAPIFactory upgrade )
+    public static void registerAPIFactory( @Nonnull ILuaAPIFactory factory )
     {
-        findCC();
-        if( computerCraft_registerAPIFactory != null )
-        {
-            try
-            {
-                computerCraft_registerAPIFactory.invoke( null, upgrade );
-            }
-            catch( Exception e )
-            {
-                // It failed
-            }
-        }
+        getInstance().registerAPIFactory( factory );
     }
 
     /**
@@ -379,22 +230,7 @@ public final class ComputerCraftAPI
     @Nonnull
     public static IWiredNode createWiredNodeForElement( @Nonnull IWiredElement element )
     {
-        findCC();
-        if( computerCraft_createWiredNodeForElement != null )
-        {
-            try
-            {
-                return (IWiredNode) computerCraft_createWiredNodeForElement.invoke( null, element );
-            }
-            catch( ReflectiveOperationException e )
-            {
-                throw new IllegalStateException( "Error creating wired node", e );
-            }
-        }
-        else
-        {
-            throw new IllegalStateException( "ComputerCraft cannot be found" );
-        }
+        return getInstance().createWiredNodeForElement( element );
     }
 
     /**
@@ -406,118 +242,64 @@ public final class ComputerCraftAPI
      * @return The element's node
      * @see IWiredElement#getNode()
      */
-    @Nullable
-    public static IWiredElement getWiredElementAt( @Nonnull IBlockAccess world, @Nonnull BlockPos pos, @Nonnull EnumFacing side )
+    @Nonnull
+    public static LazyOptional<IWiredElement> getWiredElementAt( @Nonnull IBlockReader world, @Nonnull BlockPos pos, @Nonnull Direction side )
     {
-        findCC();
-        if( computerCraft_getWiredElementAt != null )
-        {
-            try
-            {
-                return (IWiredElement) computerCraft_getWiredElementAt.invoke( null, world, pos, side );
-            }
-            catch( ReflectiveOperationException ignored )
-            {
-            }
-        }
-
-        return null;
+        return getInstance().getWiredElementAt( world, pos, side );
     }
 
-    // The functions below here are private, and are used to interface with the non-API ComputerCraft classes.
-    // Reflection is used here so you can develop your mod without decompiling ComputerCraft and including
-    // it in your solution, and so your mod won't crash if ComputerCraft is installed.
+    private static IComputerCraftAPI instance;
 
-    private static void findCC()
+    @Nonnull
+    private static IComputerCraftAPI getInstance()
     {
-        if( !ccSearched )
-        {
-            try
-            {
-                computerCraft = Class.forName( "dan200.computercraft.ComputerCraft" );
-                computerCraft_getVersion = findCCMethod( "getVersion", new Class<?>[] {
-                } );
-                computerCraft_createUniqueNumberedSaveDir = findCCMethod( "createUniqueNumberedSaveDir", new Class<?>[] {
-                    World.class, String.class,
-                } );
-                computerCraft_createSaveDirMount = findCCMethod( "createSaveDirMount", new Class<?>[] {
-                    World.class, String.class, Long.TYPE,
-                } );
-                computerCraft_createResourceMount = findCCMethod( "createResourceMount", new Class<?>[] {
-                    Class.class, String.class, String.class,
-                } );
-                computerCraft_registerPeripheralProvider = findCCMethod( "registerPeripheralProvider", new Class<?>[] {
-                    IPeripheralProvider.class,
-                } );
-                computerCraft_registerTurtleUpgrade = findCCMethod( "registerTurtleUpgrade", new Class<?>[] {
-                    ITurtleUpgrade.class,
-                } );
-                computerCraft_registerBundledRedstoneProvider = findCCMethod( "registerBundledRedstoneProvider", new Class<?>[] {
-                    IBundledRedstoneProvider.class,
-                } );
-                computerCraft_getDefaultBundledRedstoneOutput = findCCMethod( "getDefaultBundledRedstoneOutput", new Class<?>[] {
-                    World.class, BlockPos.class, EnumFacing.class,
-                } );
-                computerCraft_registerMediaProvider = findCCMethod( "registerMediaProvider", new Class<?>[] {
-                    IMediaProvider.class,
-                } );
-                computerCraft_registerPermissionProvider = findCCMethod( "registerPermissionProvider", new Class<?>[] {
-                    ITurtlePermissionProvider.class,
-                } );
-                computerCraft_registerPocketUpgrade = findCCMethod( "registerPocketUpgrade", new Class<?>[] {
-                    IPocketUpgrade.class,
-                } );
-                computerCraft_getWirelessNetwork = findCCMethod( "getWirelessNetwork", new Class<?>[] {
-                } );
-                computerCraft_registerAPIFactory = findCCMethod( "registerAPIFactory", new Class<?>[] {
-                    ILuaAPIFactory.class,
-                } );
-                computerCraft_createWiredNodeForElement = findCCMethod( "createWiredNodeForElement", new Class<?>[] {
-                    IWiredElement.class,
-                } );
-                computerCraft_getWiredElementAt = findCCMethod( "getWiredElementAt", new Class<?>[] {
-                    IBlockAccess.class, BlockPos.class, EnumFacing.class,
-                } );
-            }
-            catch( Exception e )
-            {
-                System.err.println( "ComputerCraftAPI: ComputerCraft not found." );
-            }
-            finally
-            {
-                ccSearched = true;
-            }
-        }
-    }
+        if( instance != null ) return instance;
 
-    private static Method findCCMethod( String name, Class<?>[] args )
-    {
         try
         {
-            return computerCraft != null ? computerCraft.getMethod( name, args ) : null;
+            return instance = (IComputerCraftAPI) Class.forName( "dan200.computercraft.ComputerCraftAPIImpl" )
+                .getField( "INSTANCE" ).get( null );
         }
-        catch( NoSuchMethodException e )
+        catch( ReflectiveOperationException e )
         {
-            System.err.println( "ComputerCraftAPI: ComputerCraft method " + name + " not found." );
-            return null;
+            throw new IllegalStateException( "Cannot find ComputerCraft API", e );
         }
     }
 
-    private static boolean ccSearched = false;
-    private static Class<?> computerCraft = null;
-    private static Method computerCraft_getVersion = null;
-    private static Method computerCraft_createUniqueNumberedSaveDir = null;
-    private static Method computerCraft_createSaveDirMount = null;
-    private static Method computerCraft_createResourceMount = null;
-    private static Method computerCraft_registerPeripheralProvider = null;
-    private static Method computerCraft_registerTurtleUpgrade = null;
-    private static Method computerCraft_registerBundledRedstoneProvider = null;
-    private static Method computerCraft_getDefaultBundledRedstoneOutput = null;
-    private static Method computerCraft_registerMediaProvider = null;
-    private static Method computerCraft_registerPermissionProvider = null;
-    private static Method computerCraft_registerPocketUpgrade = null;
-    private static Method computerCraft_getWirelessNetwork = null;
-    private static Method computerCraft_registerAPIFactory = null;
-    private static Method computerCraft_createWiredNodeForElement = null;
-    private static Method computerCraft_getWiredElementAt = null;
+    public interface IComputerCraftAPI
+    {
+        @Nonnull
+        String getInstalledVersion();
+
+        int createUniqueNumberedSaveDir( @Nonnull World world, @Nonnull String parentSubPath );
+
+        @Nullable
+        IWritableMount createSaveDirMount( @Nonnull World world, @Nonnull String subPath, long capacity );
+
+        @Nullable
+        IMount createResourceMount( @Nonnull String domain, @Nonnull String subPath );
+
+        void registerPeripheralProvider( @Nonnull IPeripheralProvider provider );
+
+        void registerTurtleUpgrade( @Nonnull ITurtleUpgrade upgrade );
+
+        void registerBundledRedstoneProvider( @Nonnull IBundledRedstoneProvider provider );
+
+        int getBundledRedstoneOutput( @Nonnull World world, @Nonnull BlockPos pos, @Nonnull Direction side );
+
+        void registerMediaProvider( @Nonnull IMediaProvider provider );
+
+        void registerPocketUpgrade( @Nonnull IPocketUpgrade upgrade );
+
+        @Nonnull
+        IPacketNetwork getWirelessNetwork();
+
+        void registerAPIFactory( @Nonnull ILuaAPIFactory factory );
+
+        @Nonnull
+        IWiredNode createWiredNodeForElement( @Nonnull IWiredElement element );
+
+        @Nonnull
+        LazyOptional<IWiredElement> getWiredElementAt( @Nonnull IBlockReader world, @Nonnull BlockPos pos, @Nonnull Direction side );
+    }
 }

src/main/java/dan200/computercraft/api/filesystem/FileOperationException.java

@@ -1,6 +1,6 @@
 /*
  * This file is part of the public ComputerCraft API - http://www.computercraft.info
- * Copyright Daniel Ratcliffe, 2011-2020. This API may be redistributed unmodified and in full only.
+ * Copyright Daniel Ratcliffe, 2011-2019. This API may be redistributed unmodified and in full only.
  * For help using the API, and posting your mods, visit the forums at computercraft.info.
  */
 package dan200.computercraft.api.filesystem;

src/main/java/dan200/computercraft/api/filesystem/IFileSystem.java

@@ -1,8 +1,9 @@
 /*
  * This file is part of the public ComputerCraft API - http://www.computercraft.info
- * Copyright Daniel Ratcliffe, 2011-2020. This API may be redistributed unmodified and in full only.
+ * Copyright Daniel Ratcliffe, 2011-2019. This API may be redistributed unmodified and in full only.
  * For help using the API, and posting your mods, visit the forums at computercraft.info.
  */
+
 package dan200.computercraft.api.filesystem;
 
 import java.io.IOException;

src/main/java/dan200/computercraft/api/filesystem/IMount.java

@@ -1,8 +1,9 @@
 /*
  * This file is part of the public ComputerCraft API - http://www.computercraft.info
- * Copyright Daniel Ratcliffe, 2011-2020. This API may be redistributed unmodified and in full only.
+ * Copyright Daniel Ratcliffe, 2011-2019. This API may be redistributed unmodified and in full only.
  * For help using the API, and posting your mods, visit the forums at computercraft.info.
  */
+
 package dan200.computercraft.api.filesystem;
 
 import dan200.computercraft.api.ComputerCraftAPI;

src/main/java/dan200/computercraft/api/filesystem/IWritableMount.java

@@ -1,8 +1,9 @@
 /*
  * This file is part of the public ComputerCraft API - http://www.computercraft.info
- * Copyright Daniel Ratcliffe, 2011-2020. This API may be redistributed unmodified and in full only.
+ * Copyright Daniel Ratcliffe, 2011-2019. This API may be redistributed unmodified and in full only.
  * For help using the API, and posting your mods, visit the forums at computercraft.info.
  */
+
 package dan200.computercraft.api.filesystem;
 
 import dan200.computercraft.api.ComputerCraftAPI;

src/main/java/dan200/computercraft/api/filesystem/package-info.java

@@ -1,9 +0,0 @@
-/*
- * This file is part of the public ComputerCraft API - http://www.computercraft.info
- * Copyright Daniel Ratcliffe, 2011-2020. This API may be redistributed unmodified and in full only.
- * For help using the API, and posting your mods, visit the forums at computercraft.info.
- */
-@API( owner = "ComputerCraft", provides = "ComputerCraft|API|FileSystem", apiVersion = "${version}" )
-package dan200.computercraft.api.filesystem;
-
-import net.minecraftforge.fml.common.API;

src/main/java/dan200/computercraft/api/lua/ArgumentHelper.java

@@ -1,8 +1,9 @@
 /*
  * This file is part of the public ComputerCraft API - http://www.computercraft.info
- * Copyright Daniel Ratcliffe, 2011-2020. This API may be redistributed unmodified and in full only.
+ * Copyright Daniel Ratcliffe, 2011-2019. This API may be redistributed unmodified and in full only.
  * For help using the API, and posting your mods, visit the forums at computercraft.info.
  */
+
 package dan200.computercraft.api.lua;
 
 import dan200.computercraft.api.peripheral.IComputerAccess;

src/main/java/dan200/computercraft/api/lua/IComputerSystem.java

@@ -1,8 +1,9 @@
 /*
  * This file is part of the public ComputerCraft API - http://www.computercraft.info
- * Copyright Daniel Ratcliffe, 2011-2020. This API may be redistributed unmodified and in full only.
+ * Copyright Daniel Ratcliffe, 2011-2019. This API may be redistributed unmodified and in full only.
  * For help using the API, and posting your mods, visit the forums at computercraft.info.
  */
+
 package dan200.computercraft.api.lua;
 
 import dan200.computercraft.api.filesystem.IFileSystem;

src/main/java/dan200/computercraft/api/lua/ILuaAPI.java

@@ -1,8 +1,9 @@
 /*
  * This file is part of the public ComputerCraft API - http://www.computercraft.info
- * Copyright Daniel Ratcliffe, 2011-2020. This API may be redistributed unmodified and in full only.
+ * Copyright Daniel Ratcliffe, 2011-2019. This API may be redistributed unmodified and in full only.
  * For help using the API, and posting your mods, visit the forums at computercraft.info.
  */
+
 package dan200.computercraft.api.lua;
 
 import dan200.computercraft.api.ComputerCraftAPI;

src/main/java/dan200/computercraft/api/lua/ILuaAPIFactory.java

@@ -1,8 +1,9 @@
 /*
  * This file is part of the public ComputerCraft API - http://www.computercraft.info
- * Copyright Daniel Ratcliffe, 2011-2020. This API may be redistributed unmodified and in full only.
+ * Copyright Daniel Ratcliffe, 2011-2019. This API may be redistributed unmodified and in full only.
  * For help using the API, and posting your mods, visit the forums at computercraft.info.
  */
+
 package dan200.computercraft.api.lua;
 
 import dan200.computercraft.api.ComputerCraftAPI;

src/main/java/dan200/computercraft/api/lua/ILuaContext.java

@@ -1,8 +1,9 @@
 /*
  * This file is part of the public ComputerCraft API - http://www.computercraft.info
- * Copyright Daniel Ratcliffe, 2011-2020. This API may be redistributed unmodified and in full only.
+ * Copyright Daniel Ratcliffe, 2011-2019. This API may be redistributed unmodified and in full only.
  * For help using the API, and posting your mods, visit the forums at computercraft.info.
  */
+
 package dan200.computercraft.api.lua;
 
 import javax.annotation.Nonnull;

src/main/java/dan200/computercraft/api/lua/ILuaObject.java

@@ -1,8 +1,9 @@
 /*
  * This file is part of the public ComputerCraft API - http://www.computercraft.info
- * Copyright Daniel Ratcliffe, 2011-2020. This API may be redistributed unmodified and in full only.
+ * Copyright Daniel Ratcliffe, 2011-2019. This API may be redistributed unmodified and in full only.
  * For help using the API, and posting your mods, visit the forums at computercraft.info.
  */
+
 package dan200.computercraft.api.lua;
 
 import dan200.computercraft.api.peripheral.IComputerAccess;

src/main/java/dan200/computercraft/api/lua/ILuaTask.java

@@ -1,8 +1,9 @@
 /*
  * This file is part of the public ComputerCraft API - http://www.computercraft.info
- * Copyright Daniel Ratcliffe, 2011-2020. This API may be redistributed unmodified and in full only.
+ * Copyright Daniel Ratcliffe, 2011-2019. This API may be redistributed unmodified and in full only.
  * For help using the API, and posting your mods, visit the forums at computercraft.info.
  */
+
 package dan200.computercraft.api.lua;
 
 import javax.annotation.Nullable;

src/main/java/dan200/computercraft/api/lua/LuaException.java

@@ -1,8 +1,9 @@
 /*
  * This file is part of the public ComputerCraft API - http://www.computercraft.info
- * Copyright Daniel Ratcliffe, 2011-2020. This API may be redistributed unmodified and in full only.
+ * Copyright Daniel Ratcliffe, 2011-2019. This API may be redistributed unmodified and in full only.
  * For help using the API, and posting your mods, visit the forums at computercraft.info.
  */
+
 package dan200.computercraft.api.lua;
 
 import javax.annotation.Nullable;

src/main/java/dan200/computercraft/api/lua/package-info.java

@@ -1,9 +0,0 @@
-/*
- * This file is part of the public ComputerCraft API - http://www.computercraft.info
- * Copyright Daniel Ratcliffe, 2011-2020. This API may be redistributed unmodified and in full only.
- * For help using the API, and posting your mods, visit the forums at computercraft.info.
- */
-@API( owner = "ComputerCraft", provides = "ComputerCraft|API|Lua", apiVersion = "${version}" )
-package dan200.computercraft.api.lua;
-
-import net.minecraftforge.fml.common.API;

src/main/java/dan200/computercraft/api/media/IMedia.java

@@ -1,8 +1,9 @@
 /*
  * This file is part of the public ComputerCraft API - http://www.computercraft.info
- * Copyright Daniel Ratcliffe, 2011-2020. This API may be redistributed unmodified and in full only.
+ * Copyright Daniel Ratcliffe, 2011-2019. This API may be redistributed unmodified and in full only.
  * For help using the API, and posting your mods, visit the forums at computercraft.info.
  */
+
 package dan200.computercraft.api.media;
 
 import dan200.computercraft.api.filesystem.IMount;

src/main/java/dan200/computercraft/api/media/IMediaProvider.java

@@ -1,8 +1,9 @@
 /*
  * This file is part of the public ComputerCraft API - http://www.computercraft.info
- * Copyright Daniel Ratcliffe, 2011-2020. This API may be redistributed unmodified and in full only.
+ * Copyright Daniel Ratcliffe, 2011-2019. This API may be redistributed unmodified and in full only.
  * For help using the API, and posting your mods, visit the forums at computercraft.info.
  */
+
 package dan200.computercraft.api.media;
 
 import net.minecraft.item.ItemStack;

src/main/java/dan200/computercraft/api/media/package-info.java

@@ -1,9 +0,0 @@
-/*
- * This file is part of the public ComputerCraft API - http://www.computercraft.info
- * Copyright Daniel Ratcliffe, 2011-2020. This API may be redistributed unmodified and in full only.
- * For help using the API, and posting your mods, visit the forums at computercraft.info.
- */
-@API( owner = "ComputerCraft", provides = "ComputerCraft|API|Media", apiVersion = "${version}" )
-package dan200.computercraft.api.media;
-
-import net.minecraftforge.fml.common.API;

src/main/java/dan200/computercraft/api/network/IPacketNetwork.java

@@ -1,6 +1,6 @@
 /*
  * This file is part of the public ComputerCraft API - http://www.computercraft.info
- * Copyright Daniel Ratcliffe, 2011-2020. This API may be redistributed unmodified and in full only.
+ * Copyright Daniel Ratcliffe, 2011-2019. This API may be redistributed unmodified and in full only.
  * For help using the API, and posting your mods, visit the forums at computercraft.info.
  */
 package dan200.computercraft.api.network;

src/main/java/dan200/computercraft/api/network/IPacketReceiver.java

@@ -1,6 +1,6 @@
 /*
  * This file is part of the public ComputerCraft API - http://www.computercraft.info
- * Copyright Daniel Ratcliffe, 2011-2020. This API may be redistributed unmodified and in full only.
+ * Copyright Daniel Ratcliffe, 2011-2019. This API may be redistributed unmodified and in full only.
  * For help using the API, and posting your mods, visit the forums at computercraft.info.
  */
 package dan200.computercraft.api.network;

src/main/java/dan200/computercraft/api/network/IPacketSender.java

@@ -1,6 +1,6 @@
 /*
  * This file is part of the public ComputerCraft API - http://www.computercraft.info
- * Copyright Daniel Ratcliffe, 2011-2020. This API may be redistributed unmodified and in full only.
+ * Copyright Daniel Ratcliffe, 2011-2019. This API may be redistributed unmodified and in full only.
  * For help using the API, and posting your mods, visit the forums at computercraft.info.
  */
 package dan200.computercraft.api.network;

src/main/java/dan200/computercraft/api/network/Packet.java

@@ -1,6 +1,6 @@
 /*
  * This file is part of the public ComputerCraft API - http://www.computercraft.info
- * Copyright Daniel Ratcliffe, 2011-2020. This API may be redistributed unmodified and in full only.
+ * Copyright Daniel Ratcliffe, 2011-2019. This API may be redistributed unmodified and in full only.
  * For help using the API, and posting your mods, visit the forums at computercraft.info.
  */
 package dan200.computercraft.api.network;

src/main/java/dan200/computercraft/api/network/package-info.java

@@ -1,9 +0,0 @@
-/*
- * This file is part of the public ComputerCraft API - http://www.computercraft.info
- * Copyright Daniel Ratcliffe, 2011-2020. This API may be redistributed unmodified and in full only.
- * For help using the API, and posting your mods, visit the forums at computercraft.info.
- */
-@API( owner = "ComputerCraft", provides = "ComputerCraft|API|Network", apiVersion = "${version}" )
-package dan200.computercraft.api.network;
-
-import net.minecraftforge.fml.common.API;

src/main/java/dan200/computercraft/api/network/wired/IWiredElement.java

@@ -1,8 +1,9 @@
 /*
  * This file is part of the public ComputerCraft API - http://www.computercraft.info
- * Copyright Daniel Ratcliffe, 2011-2020. This API may be redistributed unmodified and in full only.
+ * Copyright Daniel Ratcliffe, 2011-2019. This API may be redistributed unmodified and in full only.
  * For help using the API, and posting your mods, visit the forums at computercraft.info.
  */
+
 package dan200.computercraft.api.network.wired;
 
 import dan200.computercraft.api.ComputerCraftAPI;

src/main/java/dan200/computercraft/api/network/wired/IWiredNetwork.java

@@ -1,8 +1,9 @@
 /*
  * This file is part of the public ComputerCraft API - http://www.computercraft.info
- * Copyright Daniel Ratcliffe, 2011-2020. This API may be redistributed unmodified and in full only.
+ * Copyright Daniel Ratcliffe, 2011-2019. This API may be redistributed unmodified and in full only.
  * For help using the API, and posting your mods, visit the forums at computercraft.info.
  */
+
 package dan200.computercraft.api.network.wired;
 
 import dan200.computercraft.api.peripheral.IPeripheral;

src/main/java/dan200/computercraft/api/network/wired/IWiredNetworkChange.java

@@ -1,8 +1,9 @@
 /*
  * This file is part of the public ComputerCraft API - http://www.computercraft.info
- * Copyright Daniel Ratcliffe, 2011-2020. This API may be redistributed unmodified and in full only.
+ * Copyright Daniel Ratcliffe, 2011-2019. This API may be redistributed unmodified and in full only.
  * For help using the API, and posting your mods, visit the forums at computercraft.info.
  */
+
 package dan200.computercraft.api.network.wired;
 
 import dan200.computercraft.api.peripheral.IPeripheral;

src/main/java/dan200/computercraft/api/network/wired/IWiredNode.java

@@ -1,8 +1,9 @@
 /*
  * This file is part of the public ComputerCraft API - http://www.computercraft.info
- * Copyright Daniel Ratcliffe, 2011-2020. This API may be redistributed unmodified and in full only.
+ * Copyright Daniel Ratcliffe, 2011-2019. This API may be redistributed unmodified and in full only.
  * For help using the API, and posting your mods, visit the forums at computercraft.info.
  */
+
 package dan200.computercraft.api.network.wired;
 
 import dan200.computercraft.api.network.IPacketNetwork;

src/main/java/dan200/computercraft/api/network/wired/IWiredSender.java

@@ -1,8 +1,9 @@
 /*
  * This file is part of the public ComputerCraft API - http://www.computercraft.info
- * Copyright Daniel Ratcliffe, 2011-2020. This API may be redistributed unmodified and in full only.
+ * Copyright Daniel Ratcliffe, 2011-2019. This API may be redistributed unmodified and in full only.
  * For help using the API, and posting your mods, visit the forums at computercraft.info.
  */
+
 package dan200.computercraft.api.network.wired;
 
 import dan200.computercraft.api.network.IPacketSender;

src/main/java/dan200/computercraft/api/network/wired/package-info.java

@@ -1,9 +0,0 @@
-/*
- * This file is part of the public ComputerCraft API - http://www.computercraft.info
- * Copyright Daniel Ratcliffe, 2011-2020. This API may be redistributed unmodified and in full only.
- * For help using the API, and posting your mods, visit the forums at computercraft.info.
- */
-@API( owner = "ComputerCraft", provides = "ComputerCraft|API|Network|Wired", apiVersion = "${version}" )
-package dan200.computercraft.api.network.wired;
-
-import net.minecraftforge.fml.common.API;

src/main/java/dan200/computercraft/api/package-info.java

@@ -1,9 +0,0 @@
-/*
- * This file is part of the public ComputerCraft API - http://www.computercraft.info
- * Copyright Daniel Ratcliffe, 2011-2020. This API may be redistributed unmodified and in full only.
- * For help using the API, and posting your mods, visit the forums at computercraft.info.
- */
-@API( owner = "ComputerCraft", provides = "ComputerCraft|API", apiVersion = "${version}" )
-package dan200.computercraft.api;
-
-import net.minecraftforge.fml.common.API;

src/main/java/dan200/computercraft/api/peripheral/IComputerAccess.java

@@ -1,8 +1,9 @@
 /*
  * This file is part of the public ComputerCraft API - http://www.computercraft.info
- * Copyright Daniel Ratcliffe, 2011-2020. This API may be redistributed unmodified and in full only.
+ * Copyright Daniel Ratcliffe, 2011-2019. This API may be redistributed unmodified and in full only.
  * For help using the API, and posting your mods, visit the forums at computercraft.info.
  */
+
 package dan200.computercraft.api.peripheral;
 
 import dan200.computercraft.api.ComputerCraftAPI;

src/main/java/dan200/computercraft/api/peripheral/IPeripheral.java

@@ -1,8 +1,9 @@
 /*
  * This file is part of the public ComputerCraft API - http://www.computercraft.info
- * Copyright Daniel Ratcliffe, 2011-2020. This API may be redistributed unmodified and in full only.
+ * Copyright Daniel Ratcliffe, 2011-2019. This API may be redistributed unmodified and in full only.
  * For help using the API, and posting your mods, visit the forums at computercraft.info.
  */
+
 package dan200.computercraft.api.peripheral;
 
 import dan200.computercraft.api.lua.ArgumentHelper;

src/main/java/dan200/computercraft/api/peripheral/IPeripheralProvider.java

@@ -1,12 +1,13 @@
 /*
  * This file is part of the public ComputerCraft API - http://www.computercraft.info
- * Copyright Daniel Ratcliffe, 2011-2020. This API may be redistributed unmodified and in full only.
+ * Copyright Daniel Ratcliffe, 2011-2019. This API may be redistributed unmodified and in full only.
  * For help using the API, and posting your mods, visit the forums at computercraft.info.
  */
+
 package dan200.computercraft.api.peripheral;
 
 import net.minecraft.tileentity.TileEntity;
-import net.minecraft.util.EnumFacing;
+import net.minecraft.util.Direction;
 import net.minecraft.util.math.BlockPos;
 import net.minecraft.world.World;
 
@@ -33,5 +34,5 @@ public interface IPeripheralProvider
      * @see dan200.computercraft.api.ComputerCraftAPI#registerPeripheralProvider(IPeripheralProvider)
      */
     @Nullable
-    IPeripheral getPeripheral( @Nonnull World world, @Nonnull BlockPos pos, @Nonnull EnumFacing side );
+    IPeripheral getPeripheral( @Nonnull World world, @Nonnull BlockPos pos, @Nonnull Direction side );
 }

src/main/java/dan200/computercraft/api/peripheral/IPeripheralTile.java

@@ -1,11 +1,11 @@
 /*
  * This file is part of the public ComputerCraft API - http://www.computercraft.info
- * Copyright Daniel Ratcliffe, 2011-2020. This API may be redistributed unmodified and in full only.
+ * Copyright Daniel Ratcliffe, 2011-2019. This API may be redistributed unmodified and in full only.
  * For help using the API, and posting your mods, visit the forums at computercraft.info.
  */
 package dan200.computercraft.api.peripheral;
 
-import net.minecraft.util.EnumFacing;
+import net.minecraft.util.Direction;
 import net.minecraft.util.math.BlockPos;
 import net.minecraft.world.World;
 
@@ -25,8 +25,8 @@ public interface IPeripheralTile
      *
      * @param side The side to get the peripheral from.
      * @return A peripheral, or {@code null} if there is not a peripheral here.
-     * @see IPeripheralProvider#getPeripheral(World, BlockPos, EnumFacing)
+     * @see IPeripheralProvider#getPeripheral(World, BlockPos, Direction)
      */
     @Nullable
-    IPeripheral getPeripheral( @Nonnull EnumFacing side );
+    IPeripheral getPeripheral( @Nonnull Direction side );
 }

src/main/java/dan200/computercraft/api/peripheral/IWorkMonitor.java

@@ -1,6 +1,6 @@
 /*
  * This file is part of the public ComputerCraft API - http://www.computercraft.info
- * Copyright Daniel Ratcliffe, 2011-2020. This API may be redistributed unmodified and in full only.
+ * Copyright Daniel Ratcliffe, 2011-2019. This API may be redistributed unmodified and in full only.
  * For help using the API, and posting your mods, visit the forums at computercraft.info.
  */
 package dan200.computercraft.api.peripheral;

src/main/java/dan200/computercraft/api/peripheral/package-info.java

@@ -1,9 +0,0 @@
-/*
- * This file is part of the public ComputerCraft API - http://www.computercraft.info
- * Copyright Daniel Ratcliffe, 2011-2020. This API may be redistributed unmodified and in full only.
- * For help using the API, and posting your mods, visit the forums at computercraft.info.
- */
-@API( owner = "ComputerCraft", provides = "ComputerCraft|API|Peripheral", apiVersion = "${version}" )
-package dan200.computercraft.api.peripheral;
-
-import net.minecraftforge.fml.common.API;

src/main/java/dan200/computercraft/api/permissions/ITurtlePermissionProvider.java

@@ -1,41 +0,0 @@
-/*
- * This file is part of the public ComputerCraft API - http://www.computercraft.info
- * Copyright Daniel Ratcliffe, 2011-2020. This API may be redistributed unmodified and in full only.
- * For help using the API, and posting your mods, visit the forums at computercraft.info.
- */
-package dan200.computercraft.api.permissions;
-
-import net.minecraft.util.math.BlockPos;
-import net.minecraft.world.World;
-
-import javax.annotation.Nonnull;
-
-/**
- * This interface is used to restrict where turtles can move or build.
- *
- * Turtles will call these methods before attempting to perform an action, allowing them to be cancelled.
- *
- * @see dan200.computercraft.api.ComputerCraftAPI#registerPermissionProvider(ITurtlePermissionProvider)
- */
-public interface ITurtlePermissionProvider
-{
-    /**
-     * Determine whether a block can be entered by a turtle.
-     *
-     * @param world The world the block exists in
-     * @param pos   The location of the block.
-     * @return Whether the turtle can move into this block.
-     */
-    boolean isBlockEnterable( @Nonnull World world, @Nonnull BlockPos pos );
-
-    /**
-     * Determine whether a block can be modified by a turtle.
-     *
-     * This includes breaking and placing blocks.
-     *
-     * @param world The world the block exists in
-     * @param pos   The location of the block.
-     * @return Whether the turtle can modify this block.
-     */
-    boolean isBlockEditable( @Nonnull World world, @Nonnull BlockPos pos );
-}

src/main/java/dan200/computercraft/api/permissions/package-info.java

@@ -1,9 +0,0 @@
-/*
- * This file is part of the public ComputerCraft API - http://www.computercraft.info
- * Copyright Daniel Ratcliffe, 2011-2020. This API may be redistributed unmodified and in full only.
- * For help using the API, and posting your mods, visit the forums at computercraft.info.
- */
-@API( owner = "ComputerCraft", provides = "ComputerCraft|API|Permissions", apiVersion = "${version}" )
-package dan200.computercraft.api.permissions;
-
-import net.minecraftforge.fml.common.API;

src/main/java/dan200/computercraft/api/pocket/AbstractPocketUpgrade.java

@@ -1,12 +1,14 @@
 /*
  * This file is part of the public ComputerCraft API - http://www.computercraft.info
- * Copyright Daniel Ratcliffe, 2011-2020. This API may be redistributed unmodified and in full only.
+ * Copyright Daniel Ratcliffe, 2011-2019. This API may be redistributed unmodified and in full only.
  * For help using the API, and posting your mods, visit the forums at computercraft.info.
  */
 package dan200.computercraft.api.pocket;
 
 import net.minecraft.item.ItemStack;
+import net.minecraft.util.IItemProvider;
 import net.minecraft.util.ResourceLocation;
+import net.minecraft.util.Util;
 
 import javax.annotation.Nonnull;
 
@@ -28,9 +30,14 @@ public abstract class AbstractPocketUpgrade implements IPocketUpgrade
         this.stack = stack;
     }
 
-    protected AbstractPocketUpgrade( ResourceLocation id, ItemStack stack )
+    protected AbstractPocketUpgrade( ResourceLocation id, String adjective, IItemProvider item )
     {
-        this( id, "upgrade." + id + ".adjective", stack );
+        this( id, adjective, new ItemStack( item ) );
+    }
+
+    protected AbstractPocketUpgrade( ResourceLocation id, IItemProvider item )
+    {
+        this( id, Util.makeTranslationKey( "upgrade", id ) + ".adjective", new ItemStack( item ) );
     }
 
     @Nonnull

src/main/java/dan200/computercraft/api/pocket/IPocketAccess.java

@@ -1,13 +1,14 @@
 /*
  * This file is part of the public ComputerCraft API - http://www.computercraft.info
- * Copyright Daniel Ratcliffe, 2011-2020. This API may be redistributed unmodified and in full only.
+ * Copyright Daniel Ratcliffe, 2011-2019. This API may be redistributed unmodified and in full only.
  * For help using the API, and posting your mods, visit the forums at computercraft.info.
  */
+
 package dan200.computercraft.api.pocket;
 
 import dan200.computercraft.api.peripheral.IPeripheral;
 import net.minecraft.entity.Entity;
-import net.minecraft.nbt.NBTTagCompound;
+import net.minecraft.nbt.CompoundNBT;
 import net.minecraft.util.ResourceLocation;
 
 import javax.annotation.Nonnull;
@@ -22,22 +23,12 @@ public interface IPocketAccess
     /**
      * Gets the entity holding this item.
      *
-     * @return The holding entity. This may be {@code null}.
-     * @deprecated Use {@link #getValidEntity()} where possible.
-     */
-    @Nullable
-    @Deprecated
-    Entity getEntity();
-
-    /**
-     * Gets the entity holding this item with additional safety checks.
-     *
      * This must be called on the server thread.
      *
      * @return The holding entity, or {@code null} if none exists.
      */
     @Nullable
-    Entity getValidEntity();
+    Entity getEntity();
 
     /**
      * Get the colour of this pocket computer as a RGB number.
@@ -84,7 +75,7 @@ public interface IPocketAccess
      * @see #updateUpgradeNBTData()
      */
     @Nonnull
-    NBTTagCompound getUpgradeNBTData();
+    CompoundNBT getUpgradeNBTData();
 
     /**
      * Mark the upgrade-specific NBT as dirty.

src/main/java/dan200/computercraft/api/pocket/IPocketUpgrade.java

@@ -1,8 +1,9 @@
 /*
  * This file is part of the public ComputerCraft API - http://www.computercraft.info
- * Copyright Daniel Ratcliffe, 2011-2020. This API may be redistributed unmodified and in full only.
+ * Copyright Daniel Ratcliffe, 2011-2019. This API may be redistributed unmodified and in full only.
  * For help using the API, and posting your mods, visit the forums at computercraft.info.
  */
+
 package dan200.computercraft.api.pocket;
 
 import dan200.computercraft.api.ComputerCraftAPI;

src/main/java/dan200/computercraft/api/redstone/IBundledRedstoneProvider.java

@@ -1,11 +1,12 @@
 /*
  * This file is part of the public ComputerCraft API - http://www.computercraft.info
- * Copyright Daniel Ratcliffe, 2011-2020. This API may be redistributed unmodified and in full only.
+ * Copyright Daniel Ratcliffe, 2011-2019. This API may be redistributed unmodified and in full only.
  * For help using the API, and posting your mods, visit the forums at computercraft.info.
  */
+
 package dan200.computercraft.api.redstone;
 
-import net.minecraft.util.EnumFacing;
+import net.minecraft.util.Direction;
 import net.minecraft.util.math.BlockPos;
 import net.minecraft.world.World;
 
@@ -29,5 +30,5 @@ public interface IBundledRedstoneProvider
      * handle this block.
      * @see dan200.computercraft.api.ComputerCraftAPI#registerBundledRedstoneProvider(IBundledRedstoneProvider)
      */
-    int getBundledRedstoneOutput( @Nonnull World world, @Nonnull BlockPos pos, @Nonnull EnumFacing side );
+    int getBundledRedstoneOutput( @Nonnull World world, @Nonnull BlockPos pos, @Nonnull Direction side );
 }

src/main/java/dan200/computercraft/api/redstone/package-info.java

@@ -1,9 +0,0 @@
-/*
- * This file is part of the public ComputerCraft API - http://www.computercraft.info
- * Copyright Daniel Ratcliffe, 2011-2020. This API may be redistributed unmodified and in full only.
- * For help using the API, and posting your mods, visit the forums at computercraft.info.
- */
-@API( owner = "ComputerCraft", provides = "ComputerCraft|API|Redstone", apiVersion = "${version}" )
-package dan200.computercraft.api.redstone;
-
-import net.minecraftforge.fml.common.API;

src/main/java/dan200/computercraft/api/turtle/ITurtleAccess.java

@@ -1,8 +1,9 @@
 /*
  * This file is part of the public ComputerCraft API - http://www.computercraft.info
- * Copyright Daniel Ratcliffe, 2011-2020. This API may be redistributed unmodified and in full only.
+ * Copyright Daniel Ratcliffe, 2011-2019. This API may be redistributed unmodified and in full only.
  * For help using the API, and posting your mods, visit the forums at computercraft.info.
  */
+
 package dan200.computercraft.api.turtle;
 
 import com.mojang.authlib.GameProfile;
@@ -10,8 +11,8 @@ import dan200.computercraft.api.lua.ILuaContext;
 import dan200.computercraft.api.lua.LuaException;
 import dan200.computercraft.api.peripheral.IPeripheral;
 import net.minecraft.inventory.IInventory;
-import net.minecraft.nbt.NBTTagCompound;
-import net.minecraft.util.EnumFacing;
+import net.minecraft.nbt.CompoundNBT;
+import net.minecraft.util.Direction;
 import net.minecraft.util.math.BlockPos;
 import net.minecraft.util.math.Vec3d;
 import net.minecraft.world.World;
@@ -53,8 +54,7 @@ public interface ITurtleAccess
      * @param world The new world to move it to
      * @param pos   The new position to move it to.
      * @return Whether the movement was successful. It may fail if the block was not loaded or the block placement
-     * was cancelled. Note this will not check
-     * {@link dan200.computercraft.api.permissions.ITurtlePermissionProvider#isBlockEnterable(World, BlockPos)}.
+     * was cancelled.
      * @throws UnsupportedOperationException When attempting to teleport on the client side.
      */
     boolean teleportTo( @Nonnull World world, @Nonnull BlockPos pos );
@@ -83,10 +83,10 @@ public interface ITurtleAccess
      * Returns the world direction the turtle is currently facing.
      *
      * @return The world direction the turtle is currently facing.
-     * @see #setDirection(EnumFacing)
+     * @see #setDirection(Direction)
      */
     @Nonnull
-    EnumFacing getDirection();
+    Direction getDirection();
 
     /**
      * Set the direction the turtle is facing. Note that this will not play a rotation animation, you will also need to
@@ -95,7 +95,7 @@ public interface ITurtleAccess
      * @param dir The new direction to set. This should be on either the x or z axis (so north, south, east or west).
      * @see #getDirection()
      */
-    void setDirection( @Nonnull EnumFacing dir );
+    void setDirection( @Nonnull Direction dir );
 
     /**
      * Get the currently selected slot in the turtle's inventory.
@@ -294,7 +294,7 @@ public interface ITurtleAccess
      * @see #updateUpgradeNBTData(TurtleSide)
      */
     @Nonnull
-    NBTTagCompound getUpgradeNBTData( @Nullable TurtleSide side );
+    CompoundNBT getUpgradeNBTData( @Nullable TurtleSide side );
 
     /**
      * Mark the upgrade-specific data as dirty on a specific side. This is required for the data to be synced to the

src/main/java/dan200/computercraft/api/turtle/ITurtleCommand.java

@@ -1,8 +1,9 @@
 /*
  * This file is part of the public ComputerCraft API - http://www.computercraft.info
- * Copyright Daniel Ratcliffe, 2011-2020. This API may be redistributed unmodified and in full only.
+ * Copyright Daniel Ratcliffe, 2011-2019. This API may be redistributed unmodified and in full only.
  * For help using the API, and posting your mods, visit the forums at computercraft.info.
  */
+
 package dan200.computercraft.api.turtle;
 
 import dan200.computercraft.api.lua.ILuaContext;

src/main/java/dan200/computercraft/api/turtle/ITurtleUpgrade.java

@@ -1,23 +1,24 @@
 /*
  * This file is part of the public ComputerCraft API - http://www.computercraft.info
- * Copyright Daniel Ratcliffe, 2011-2020. This API may be redistributed unmodified and in full only.
+ * Copyright Daniel Ratcliffe, 2011-2019. This API may be redistributed unmodified and in full only.
  * For help using the API, and posting your mods, visit the forums at computercraft.info.
  */
+
 package dan200.computercraft.api.turtle;
 
 import dan200.computercraft.api.ComputerCraftAPI;
 import dan200.computercraft.api.peripheral.IPeripheral;
 import dan200.computercraft.api.turtle.event.TurtleAttackEvent;
 import dan200.computercraft.api.turtle.event.TurtleBlockEvent;
-import net.minecraft.client.renderer.block.model.IBakedModel;
-import net.minecraft.client.renderer.block.model.ModelResourceLocation;
+import net.minecraft.client.renderer.model.IBakedModel;
+import net.minecraft.client.renderer.model.ModelResourceLocation;
 import net.minecraft.item.ItemStack;
-import net.minecraft.util.EnumFacing;
+import net.minecraft.util.Direction;
 import net.minecraft.util.ResourceLocation;
+import net.minecraftforge.api.distmarker.Dist;
+import net.minecraftforge.api.distmarker.OnlyIn;
 import net.minecraftforge.event.entity.player.AttackEntityEvent;
 import net.minecraftforge.event.world.BlockEvent;
-import net.minecraftforge.fml.relauncher.Side;
-import net.minecraftforge.fml.relauncher.SideOnly;
 import org.apache.commons.lang3.tuple.Pair;
 
 import javax.annotation.Nonnull;
@@ -43,17 +44,6 @@ public interface ITurtleUpgrade
     @Nonnull
     ResourceLocation getUpgradeID();
 
-    /**
-     * Gets a numerical identifier representing this type of turtle upgrade,
-     * for backwards compatibility with pre-1.76 worlds. If your upgrade was
-     * not released for older ComputerCraft versions, you can return -1 here.
-     * The turtle will fail registration if an already used positive ID is specified.
-     *
-     * @return The legacy ID, or -1 if is needed.
-     * @see ComputerCraftAPI#registerTurtleUpgrade(ITurtleUpgrade)
-     */
-    int getLegacyUpgradeID();
-
     /**
      * Return an unlocalised string to describe this type of turtle in turtle item names.
      *
@@ -123,7 +113,7 @@ public interface ITurtleUpgrade
      * to be called.
      */
     @Nonnull
-    default TurtleCommandResult useTool( @Nonnull ITurtleAccess turtle, @Nonnull TurtleSide side, @Nonnull TurtleVerb verb, @Nonnull EnumFacing direction )
+    default TurtleCommandResult useTool( @Nonnull ITurtleAccess turtle, @Nonnull TurtleSide side, @Nonnull TurtleVerb verb, @Nonnull Direction direction )
     {
         return TurtleCommandResult.failure();
     }
@@ -132,7 +122,7 @@ public interface ITurtleUpgrade
      * Called to obtain the model to be used when rendering a turtle peripheral.
      *
      * This can be obtained from {@link net.minecraft.client.renderer.ItemModelMesher#getItemModel(ItemStack)},
-     * {@link net.minecraft.client.renderer.block.model.ModelManager#getModel(ModelResourceLocation)} or any other
+     * {@link net.minecraft.client.renderer.model.ModelManager#getModel(ModelResourceLocation)} or any other
      * source.
      *
      * @param turtle Access to the turtle that the upgrade resides on. This will be null when getting item models!
@@ -141,7 +131,7 @@ public interface ITurtleUpgrade
      * a transformation of {@code null} has the same effect as the identify matrix.
      */
     @Nonnull
-    @SideOnly( Side.CLIENT )
+    @OnlyIn( Dist.CLIENT )
     Pair<IBakedModel, Matrix4f> getModel( @Nullable ITurtleAccess turtle, @Nonnull TurtleSide side );
 
     /**

src/main/java/dan200/computercraft/api/turtle/TurtleAnimation.java

@@ -1,8 +1,9 @@
 /*
  * This file is part of the public ComputerCraft API - http://www.computercraft.info
- * Copyright Daniel Ratcliffe, 2011-2020. This API may be redistributed unmodified and in full only.
+ * Copyright Daniel Ratcliffe, 2011-2019. This API may be redistributed unmodified and in full only.
  * For help using the API, and posting your mods, visit the forums at computercraft.info.
  */
+
 package dan200.computercraft.api.turtle;
 
 /**

src/main/java/dan200/computercraft/api/turtle/TurtleCommandResult.java

@@ -1,11 +1,12 @@
 /*
  * This file is part of the public ComputerCraft API - http://www.computercraft.info
- * Copyright Daniel Ratcliffe, 2011-2020. This API may be redistributed unmodified and in full only.
+ * Copyright Daniel Ratcliffe, 2011-2019. This API may be redistributed unmodified and in full only.
  * For help using the API, and posting your mods, visit the forums at computercraft.info.
  */
+
 package dan200.computercraft.api.turtle;
 
-import net.minecraft.util.EnumFacing;
+import net.minecraft.util.Direction;
 
 import javax.annotation.Nonnull;
 import javax.annotation.Nullable;
@@ -14,7 +15,7 @@ import javax.annotation.Nullable;
  * Used to indicate the result of executing a turtle command.
  *
  * @see ITurtleCommand#execute(ITurtleAccess)
- * @see ITurtleUpgrade#useTool(ITurtleAccess, TurtleSide, TurtleVerb, EnumFacing)
+ * @see ITurtleUpgrade#useTool(ITurtleAccess, TurtleSide, TurtleVerb, Direction)
  */
 public final class TurtleCommandResult
 {

src/main/java/dan200/computercraft/api/turtle/TurtleSide.java

@@ -1,8 +1,9 @@
 /*
  * This file is part of the public ComputerCraft API - http://www.computercraft.info
- * Copyright Daniel Ratcliffe, 2011-2020. This API may be redistributed unmodified and in full only.
+ * Copyright Daniel Ratcliffe, 2011-2019. This API may be redistributed unmodified and in full only.
  * For help using the API, and posting your mods, visit the forums at computercraft.info.
  */
+
 package dan200.computercraft.api.turtle;
 
 /**

src/main/java/dan200/computercraft/api/turtle/TurtleUpgradeType.java

@@ -1,8 +1,9 @@
 /*
  * This file is part of the public ComputerCraft API - http://www.computercraft.info
- * Copyright Daniel Ratcliffe, 2011-2020. This API may be redistributed unmodified and in full only.
+ * Copyright Daniel Ratcliffe, 2011-2019. This API may be redistributed unmodified and in full only.
  * For help using the API, and posting your mods, visit the forums at computercraft.info.
  */
+
 package dan200.computercraft.api.turtle;
 
 /**

src/main/java/dan200/computercraft/api/turtle/TurtleVerb.java

@@ -1,18 +1,19 @@
 /*
  * This file is part of the public ComputerCraft API - http://www.computercraft.info
- * Copyright Daniel Ratcliffe, 2011-2020. This API may be redistributed unmodified and in full only.
+ * Copyright Daniel Ratcliffe, 2011-2019. This API may be redistributed unmodified and in full only.
  * For help using the API, and posting your mods, visit the forums at computercraft.info.
  */
+
 package dan200.computercraft.api.turtle;
 
-import net.minecraft.util.EnumFacing;
+import net.minecraft.util.Direction;
 
 /**
  * An enum representing the different actions that an {@link ITurtleUpgrade} of type Tool may be called on to perform by
  * a turtle.
  *
  * @see ITurtleUpgrade#getType()
- * @see ITurtleUpgrade#useTool(ITurtleAccess, TurtleSide, TurtleVerb, EnumFacing)
+ * @see ITurtleUpgrade#useTool(ITurtleAccess, TurtleSide, TurtleVerb, Direction)
  */
 public enum TurtleVerb
 {

src/main/java/dan200/computercraft/api/turtle/event/TurtleAction.java

@@ -1,8 +1,9 @@
 /*
  * This file is part of the public ComputerCraft API - http://www.computercraft.info
- * Copyright Daniel Ratcliffe, 2011-2020. This API may be redistributed unmodified and in full only.
+ * Copyright Daniel Ratcliffe, 2011-2019. This API may be redistributed unmodified and in full only.
  * For help using the API, and posting your mods, visit the forums at computercraft.info.
  */
+
 package dan200.computercraft.api.turtle.event;
 
 /**

src/main/java/dan200/computercraft/api/turtle/event/TurtleActionEvent.java

@@ -1,13 +1,14 @@
 /*
  * This file is part of the public ComputerCraft API - http://www.computercraft.info
- * Copyright Daniel Ratcliffe, 2011-2020. This API may be redistributed unmodified and in full only.
+ * Copyright Daniel Ratcliffe, 2011-2019. This API may be redistributed unmodified and in full only.
  * For help using the API, and posting your mods, visit the forums at computercraft.info.
  */
+
 package dan200.computercraft.api.turtle.event;
 
 import dan200.computercraft.api.turtle.ITurtleAccess;
 import dan200.computercraft.api.turtle.TurtleCommandResult;
-import net.minecraftforge.fml.common.eventhandler.Cancelable;
+import net.minecraftforge.eventbus.api.Cancelable;
 
 import javax.annotation.Nonnull;
 import javax.annotation.Nullable;

src/main/java/dan200/computercraft/api/turtle/event/TurtleAttackEvent.java

@@ -1,8 +1,9 @@
 /*
  * This file is part of the public ComputerCraft API - http://www.computercraft.info
- * Copyright Daniel Ratcliffe, 2011-2020. This API may be redistributed unmodified and in full only.
+ * Copyright Daniel Ratcliffe, 2011-2019. This API may be redistributed unmodified and in full only.
  * For help using the API, and posting your mods, visit the forums at computercraft.info.
  */
+
 package dan200.computercraft.api.turtle.event;
 
 import dan200.computercraft.api.turtle.ITurtleAccess;
@@ -10,7 +11,7 @@ import dan200.computercraft.api.turtle.ITurtleUpgrade;
 import dan200.computercraft.api.turtle.TurtleSide;
 import dan200.computercraft.api.turtle.TurtleVerb;
 import net.minecraft.entity.Entity;
-import net.minecraft.util.EnumFacing;
+import net.minecraft.util.Direction;
 import net.minecraftforge.common.util.FakePlayer;
 import net.minecraftforge.event.entity.player.AttackEntityEvent;
 
@@ -20,7 +21,7 @@ import java.util.Objects;
 /**
  * Fired when a turtle attempts to attack an entity.
  *
- * This must be fired by {@link ITurtleUpgrade#useTool(ITurtleAccess, TurtleSide, TurtleVerb, EnumFacing)},
+ * This must be fired by {@link ITurtleUpgrade#useTool(ITurtleAccess, TurtleSide, TurtleVerb, Direction)},
  * as the base {@code turtle.attack()} command does not fire it.
  *
  * Note that such commands should also fire {@link AttackEntityEvent}, so you do not need to listen to both.

src/main/java/dan200/computercraft/api/turtle/event/TurtleBlockEvent.java

@@ -1,8 +1,9 @@
 /*
  * This file is part of the public ComputerCraft API - http://www.computercraft.info
- * Copyright Daniel Ratcliffe, 2011-2020. This API may be redistributed unmodified and in full only.
+ * Copyright Daniel Ratcliffe, 2011-2019. This API may be redistributed unmodified and in full only.
  * For help using the API, and posting your mods, visit the forums at computercraft.info.
  */
+
 package dan200.computercraft.api.turtle.event;
 
 import dan200.computercraft.api.lua.ILuaContext;
@@ -11,9 +12,9 @@ import dan200.computercraft.api.turtle.ITurtleAccess;
 import dan200.computercraft.api.turtle.ITurtleUpgrade;
 import dan200.computercraft.api.turtle.TurtleSide;
 import dan200.computercraft.api.turtle.TurtleVerb;
-import net.minecraft.block.state.IBlockState;
+import net.minecraft.block.BlockState;
 import net.minecraft.item.ItemStack;
-import net.minecraft.util.EnumFacing;
+import net.minecraft.util.Direction;
 import net.minecraft.util.math.BlockPos;
 import net.minecraft.world.World;
 import net.minecraftforge.common.util.FakePlayer;
@@ -74,7 +75,7 @@ public abstract class TurtleBlockEvent extends TurtlePlayerEvent
     /**
      * Fired when a turtle attempts to dig a block.
      *
-     * This must be fired by {@link ITurtleUpgrade#useTool(ITurtleAccess, TurtleSide, TurtleVerb, EnumFacing)},
+     * This must be fired by {@link ITurtleUpgrade#useTool(ITurtleAccess, TurtleSide, TurtleVerb, Direction)},
      * as the base {@code turtle.dig()} command does not fire it.
      *
      * Note that such commands should also fire {@link BlockEvent.BreakEvent}, so you do not need to listen to both.
@@ -83,11 +84,11 @@ public abstract class TurtleBlockEvent extends TurtlePlayerEvent
      */
     public static class Dig extends TurtleBlockEvent
     {
-        private final IBlockState block;
+        private final BlockState block;
         private final ITurtleUpgrade upgrade;
         private final TurtleSide side;
 
-        public Dig( @Nonnull ITurtleAccess turtle, @Nonnull FakePlayer player, @Nonnull World world, @Nonnull BlockPos pos, @Nonnull IBlockState block, @Nonnull ITurtleUpgrade upgrade, @Nonnull TurtleSide side )
+        public Dig( @Nonnull ITurtleAccess turtle, @Nonnull FakePlayer player, @Nonnull World world, @Nonnull BlockPos pos, @Nonnull BlockState block, @Nonnull ITurtleUpgrade upgrade, @Nonnull TurtleSide side )
         {
             super( turtle, TurtleAction.DIG, player, world, pos );
 
@@ -105,7 +106,7 @@ public abstract class TurtleBlockEvent extends TurtlePlayerEvent
          * @return The block which is going to be broken.
          */
         @Nonnull
-        public IBlockState getBlock()
+        public BlockState getBlock()
         {
             return block;
         }
@@ -184,10 +185,10 @@ public abstract class TurtleBlockEvent extends TurtlePlayerEvent
      */
     public static class Inspect extends TurtleBlockEvent
     {
-        private final IBlockState state;
+        private final BlockState state;
         private final Map<String, Object> data;
 
-        public Inspect( @Nonnull ITurtleAccess turtle, @Nonnull FakePlayer player, @Nonnull World world, @Nonnull BlockPos pos, @Nonnull IBlockState state, @Nonnull Map<String, Object> data )
+        public Inspect( @Nonnull ITurtleAccess turtle, @Nonnull FakePlayer player, @Nonnull World world, @Nonnull BlockPos pos, @Nonnull BlockState state, @Nonnull Map<String, Object> data )
         {
             super( turtle, TurtleAction.INSPECT, player, world, pos );
 
@@ -203,7 +204,7 @@ public abstract class TurtleBlockEvent extends TurtlePlayerEvent
          * @return The inspected block state.
          */
         @Nonnull
-        public IBlockState getState()
+        public BlockState getState()
         {
             return state;
         }

src/main/java/dan200/computercraft/api/turtle/event/TurtleEvent.java

@@ -1,12 +1,13 @@
 /*
  * This file is part of the public ComputerCraft API - http://www.computercraft.info
- * Copyright Daniel Ratcliffe, 2011-2020. This API may be redistributed unmodified and in full only.
+ * Copyright Daniel Ratcliffe, 2011-2019. This API may be redistributed unmodified and in full only.
  * For help using the API, and posting your mods, visit the forums at computercraft.info.
  */
+
 package dan200.computercraft.api.turtle.event;
 
 import dan200.computercraft.api.turtle.ITurtleAccess;
-import net.minecraftforge.fml.common.eventhandler.Event;
+import net.minecraftforge.eventbus.api.Event;
 
 import javax.annotation.Nonnull;
 import java.util.Objects;

src/main/java/dan200/computercraft/api/turtle/event/TurtleInspectItemEvent.java

@@ -1,6 +1,6 @@
 /*
  * This file is part of the public ComputerCraft API - http://www.computercraft.info
- * Copyright Daniel Ratcliffe, 2011-2020. This API may be redistributed unmodified and in full only.
+ * Copyright Daniel Ratcliffe, 2011-2019. This API may be redistributed unmodified and in full only.
  * For help using the API, and posting your mods, visit the forums at computercraft.info.
  */
 package dan200.computercraft.api.turtle.event;

src/main/java/dan200/computercraft/api/turtle/event/TurtleInventoryEvent.java

@@ -1,8 +1,9 @@
 /*
  * This file is part of the public ComputerCraft API - http://www.computercraft.info
- * Copyright Daniel Ratcliffe, 2011-2020. This API may be redistributed unmodified and in full only.
+ * Copyright Daniel Ratcliffe, 2011-2019. This API may be redistributed unmodified and in full only.
  * For help using the API, and posting your mods, visit the forums at computercraft.info.
  */
+
 package dan200.computercraft.api.turtle.event;
 
 import dan200.computercraft.api.turtle.ITurtleAccess;

src/main/java/dan200/computercraft/api/turtle/event/TurtlePlayerEvent.java

@@ -1,8 +1,9 @@
 /*
  * This file is part of the public ComputerCraft API - http://www.computercraft.info
- * Copyright Daniel Ratcliffe, 2011-2020. This API may be redistributed unmodified and in full only.
+ * Copyright Daniel Ratcliffe, 2011-2019. This API may be redistributed unmodified and in full only.
  * For help using the API, and posting your mods, visit the forums at computercraft.info.
  */
+
 package dan200.computercraft.api.turtle.event;
 
 import dan200.computercraft.api.turtle.ITurtleAccess;

src/main/java/dan200/computercraft/api/turtle/event/TurtleRefuelEvent.java

@@ -1,6 +1,6 @@
 /*
  * This file is part of the public ComputerCraft API - http://www.computercraft.info
- * Copyright Daniel Ratcliffe, 2011-2020. This API may be redistributed unmodified and in full only.
+ * Copyright Daniel Ratcliffe, 2011-2019. This API may be redistributed unmodified and in full only.
  * For help using the API, and posting your mods, visit the forums at computercraft.info.
  */
 package dan200.computercraft.api.turtle.event;

src/main/java/dan200/computercraft/api/turtle/event/package-info.java

@@ -1,9 +0,0 @@
-/*
- * This file is part of the public ComputerCraft API - http://www.computercraft.info
- * Copyright Daniel Ratcliffe, 2011-2020. This API may be redistributed unmodified and in full only.
- * For help using the API, and posting your mods, visit the forums at computercraft.info.
- */
-@API( owner = "ComputerCraft", provides = "ComputerCraft|API|Turtle|Event", apiVersion = "${version}" )
-package dan200.computercraft.api.turtle.event;
-
-import net.minecraftforge.fml.common.API;

src/main/java/dan200/computercraft/api/turtle/package-info.java

@@ -1,9 +0,0 @@
-/*
- * This file is part of the public ComputerCraft API - http://www.computercraft.info
- * Copyright Daniel Ratcliffe, 2011-2020. This API may be redistributed unmodified and in full only.
- * For help using the API, and posting your mods, visit the forums at computercraft.info.
- */
-@API( owner = "ComputerCraft", provides = "ComputerCraft|API|Turtle", apiVersion = "${version}" )
-package dan200.computercraft.api.turtle;
-
-import net.minecraftforge.fml.common.API;

src/main/java/dan200/computercraft/client/ClientRegistry.java

@@ -1,110 +1,88 @@
 /*
  * This file is part of ComputerCraft - http://www.computercraft.info
- * Copyright Daniel Ratcliffe, 2011-2020. Do not distribute without permission.
+ * Copyright Daniel Ratcliffe, 2011-2019. Do not distribute without permission.
  * Send enquiries to dratcliffe@gmail.com
  */
+
 package dan200.computercraft.client;
 
 import dan200.computercraft.ComputerCraft;
 import dan200.computercraft.client.render.TurtleModelLoader;
-import dan200.computercraft.shared.media.items.ItemDiskLegacy;
+import dan200.computercraft.shared.common.IColouredItem;
+import dan200.computercraft.shared.media.items.ItemDisk;
 import dan200.computercraft.shared.pocket.items.ItemPocketComputer;
-import dan200.computercraft.shared.turtle.items.ItemTurtleBase;
 import dan200.computercraft.shared.util.Colour;
 import net.minecraft.client.Minecraft;
-import net.minecraft.client.renderer.ItemMeshDefinition;
-import net.minecraft.client.renderer.block.model.IBakedModel;
-import net.minecraft.client.renderer.block.model.ModelBakery;
-import net.minecraft.client.renderer.block.model.ModelResourceLocation;
-import net.minecraft.client.renderer.texture.TextureMap;
+import net.minecraft.client.renderer.model.IBakedModel;
+import net.minecraft.client.renderer.model.IUnbakedModel;
+import net.minecraft.client.renderer.model.ModelResourceLocation;
 import net.minecraft.client.renderer.vertex.DefaultVertexFormats;
-import net.minecraft.item.Item;
-import net.minecraft.item.ItemStack;
 import net.minecraft.util.ResourceLocation;
+import net.minecraftforge.api.distmarker.Dist;
 import net.minecraftforge.client.event.ColorHandlerEvent;
 import net.minecraftforge.client.event.ModelBakeEvent;
 import net.minecraftforge.client.event.ModelRegistryEvent;
 import net.minecraftforge.client.event.TextureStitchEvent;
-import net.minecraftforge.client.model.IModel;
+import net.minecraftforge.client.model.BasicState;
 import net.minecraftforge.client.model.ModelLoader;
 import net.minecraftforge.client.model.ModelLoaderRegistry;
+import net.minecraftforge.eventbus.api.SubscribeEvent;
 import net.minecraftforge.fml.common.Mod;
-import net.minecraftforge.fml.common.eventhandler.SubscribeEvent;
-import net.minecraftforge.fml.relauncher.Side;
 
-import javax.annotation.Nonnull;
+import java.util.HashSet;
+import java.util.Map;
 
 /**
  * Registers textures and models for items.
  */
-@Mod.EventBusSubscriber( modid = ComputerCraft.MOD_ID, value = Side.CLIENT )
+@Mod.EventBusSubscriber( modid = ComputerCraft.MOD_ID, value = Dist.CLIENT, bus = Mod.EventBusSubscriber.Bus.MOD )
 public final class ClientRegistry
 {
     private static final String[] EXTRA_MODELS = new String[] {
-        "turtle_modem_off_left",
-        "turtle_modem_on_left",
-        "turtle_modem_off_right",
-        "turtle_modem_on_right",
+        "turtle_modem_normal_off_left",
+        "turtle_modem_normal_on_left",
+        "turtle_modem_normal_off_right",
+        "turtle_modem_normal_on_right",
+
+        "turtle_modem_advanced_off_left",
+        "turtle_modem_advanced_on_left",
+        "turtle_modem_advanced_off_right",
+        "turtle_modem_advanced_on_right",
         "turtle_crafting_table_left",
         "turtle_crafting_table_right",
-        "advanced_turtle_modem_off_left",
-        "advanced_turtle_modem_on_left",
-        "advanced_turtle_modem_off_right",
-        "advanced_turtle_modem_on_right",
+
         "turtle_speaker_upgrade_left",
         "turtle_speaker_upgrade_right",
 
-        "turtle_white",
+        "turtle_colour",
         "turtle_elf_overlay",
     };
 
+    private static final String[] EXTRA_TEXTURES = new String[] {
+        // TODO: Gather these automatically from the model. Sadly the model loader isn't available
+        //  when stitching textures.
+        "block/turtle_colour",
+        "block/turtle_elf_overlay",
+        "block/turtle_crafty_face",
+        "block/turtle_speaker_face",
+    };
+
     private ClientRegistry() {}
 
     @SubscribeEvent
     public static void registerModels( ModelRegistryEvent event )
     {
         ModelLoaderRegistry.registerLoader( TurtleModelLoader.INSTANCE );
-
-        // Register item models
-        registerUniversalItemModel( ComputerCraft.Items.computer, "computer" );
-        registerItemModel( ComputerCraft.Items.commandComputer, 0, "command_computer" );
-
-        registerItemModel( ComputerCraft.Items.pocketComputer, 0, "pocket_computer" );
-        registerItemModel( ComputerCraft.Items.pocketComputer, 1, "advanced_pocket_computer" );
-
-        registerItemModel( ComputerCraft.Items.peripheral, 0, "peripheral" );
-        registerItemModel( ComputerCraft.Items.peripheral, 1, "wireless_modem" );
-        registerItemModel( ComputerCraft.Items.peripheral, 2, "monitor" );
-        registerItemModel( ComputerCraft.Items.peripheral, 3, "printer" );
-        registerItemModel( ComputerCraft.Items.peripheral, 4, "advanced_monitor" );
-        registerItemModel( ComputerCraft.Items.cable, 0, "cable" );
-        registerItemModel( ComputerCraft.Items.cable, 1, "wired_modem" );
-        registerItemModel( ComputerCraft.Items.advancedModem, 0, "advanced_modem" );
-        registerItemModel( ComputerCraft.Items.peripheral, 5, "speaker" );
-        registerItemModel( ComputerCraft.Items.wiredModemFull, 0, "wired_modem_full" );
-
-        registerUniversalItemModel( ComputerCraft.Items.disk, "disk" );
-        registerItemModel( ComputerCraft.Items.diskExpanded, 0, "disk_expanded" );
-        registerItemModel( ComputerCraft.Items.treasureDisk, 0, "treasure_disk" );
-
-        registerItemModel( ComputerCraft.Items.printout, 0, "printout" );
-        registerItemModel( ComputerCraft.Items.printout, 1, "pages" );
-        registerItemModel( ComputerCraft.Items.printout, 2, "book" );
-
-        registerUniversalItemModel( ComputerCraft.Items.turtle, "turtle" );
-        registerUniversalItemModel( ComputerCraft.Items.turtleExpanded, "turtle" );
-        registerUniversalItemModel( ComputerCraft.Items.turtleAdvanced, "turtle_advanced" );
     }
 
     @SubscribeEvent
     public static void onTextureStitchEvent( TextureStitchEvent.Pre event )
     {
-        // Load all textures for the extra models
-        TextureMap map = event.getMap();
-        for( String upgrade : EXTRA_MODELS )
+        if( event.getMap() != Minecraft.getInstance().getTextureMap() ) return;
+
+        for( String extra : EXTRA_TEXTURES )
         {
-            IModel model = ModelLoaderRegistry.getModelOrMissing( new ResourceLocation( "computercraft", "block/" + upgrade ) );
-            for( ResourceLocation texture : model.getTextures() ) map.registerSprite( texture );
+            event.addSprite( new ResourceLocation( ComputerCraft.MOD_ID, extra ) );
         }
     }
 
@@ -112,73 +90,79 @@ public final class ClientRegistry
     public static void onModelBakeEvent( ModelBakeEvent event )
     {
         // Load all extra models
-        for( String model : EXTRA_MODELS ) loadBlockModel( event, model );
+        ModelLoader loader = event.getModelLoader();
+        Map<ResourceLocation, IBakedModel> registry = event.getModelRegistry();
+
+        for( String model : EXTRA_MODELS )
+        {
+            IBakedModel bakedModel = bake( loader, loader.getUnbakedModel( new ResourceLocation( ComputerCraft.MOD_ID, "item/" + model ) ) );
+
+            if( bakedModel != null )
+            {
+                registry.put(
+                    new ModelResourceLocation( new ResourceLocation( ComputerCraft.MOD_ID, model ), "inventory" ),
+                    bakedModel
+                );
+            }
+        }
+
+        // And load the custom turtle models in too.
+        registry.put(
+            new ModelResourceLocation( new ResourceLocation( ComputerCraft.MOD_ID, "turtle_normal" ), "inventory" ),
+            bake( loader, TurtleModelLoader.INSTANCE.loadModel( new ResourceLocation( ComputerCraft.MOD_ID, "item/turtle_normal" ) ) )
+        );
+
+        registry.put(
+            new ModelResourceLocation( new ResourceLocation( ComputerCraft.MOD_ID, "turtle_advanced" ), "inventory" ),
+            bake( loader, TurtleModelLoader.INSTANCE.loadModel( new ResourceLocation( ComputerCraft.MOD_ID, "item/turtle_advanced" ) ) )
+        );
     }
 
     @SubscribeEvent
     public static void onItemColours( ColorHandlerEvent.Item event )
     {
-        event.getItemColors().registerItemColorHandler(
-            ( stack, layer ) -> layer == 1 ? ((ItemDiskLegacy) stack.getItem()).getColour( stack ) : 0xFFFFFF,
-            ComputerCraft.Items.disk, ComputerCraft.Items.diskExpanded
+        if( ComputerCraft.Items.disk == null || ComputerCraft.Blocks.turtleNormal == null )
+        {
+            ComputerCraft.log.warn( "Block/item registration has failed. Skipping registration of item colours." );
+            return;
+        }
+
+        event.getItemColors().register(
+            ( stack, layer ) -> layer == 1 ? ((ItemDisk) stack.getItem()).getColour( stack ) : 0xFFFFFF,
+            ComputerCraft.Items.disk
         );
 
-        event.getItemColors().registerItemColorHandler( ( stack, layer ) -> {
+        event.getItemColors().register( ( stack, layer ) -> {
             switch( layer )
             {
                 case 0:
                 default:
                     return 0xFFFFFF;
                 case 1: // Frame colour
-                    return ComputerCraft.Items.pocketComputer.getColour( stack );
+                    return IColouredItem.getColourBasic( stack );
                 case 2: // Light colour
                 {
                     int light = ItemPocketComputer.getLightState( stack );
                     return light == -1 ? Colour.Black.getHex() : light;
                 }
             }
-        }, ComputerCraft.Items.pocketComputer );
+        }, ComputerCraft.Items.pocketComputerNormal, ComputerCraft.Items.pocketComputerAdvanced );
 
         // Setup turtle colours
-        event.getItemColors().registerItemColorHandler(
-            ( stack, tintIndex ) -> tintIndex == 0 ? ((ItemTurtleBase) stack.getItem()).getColour( stack ) : 0xFFFFFF,
-            ComputerCraft.Blocks.turtle, ComputerCraft.Blocks.turtleExpanded, ComputerCraft.Blocks.turtleAdvanced
+        event.getItemColors().register(
+            ( stack, tintIndex ) -> tintIndex == 0 ? ((IColouredItem) stack.getItem()).getColour( stack ) : 0xFFFFFF,
+            ComputerCraft.Blocks.turtleNormal, ComputerCraft.Blocks.turtleAdvanced
         );
     }
 
-    private static void registerItemModel( Item item, int damage, String name )
+    private static IBakedModel bake( ModelLoader loader, IUnbakedModel model )
     {
-        ResourceLocation location = new ResourceLocation( ComputerCraft.MOD_ID, name );
-        final ModelResourceLocation res = new ModelResourceLocation( location, "inventory" );
-        ModelBakery.registerItemVariants( item, location );
-        ModelLoader.setCustomModelResourceLocation( item, damage, res );
-    }
+        model.getTextures( loader::getUnbakedModel, new HashSet<>() );
 
-    private static void registerUniversalItemModel( Item item, String mainModel )
-    {
-        ResourceLocation mainLocation = new ResourceLocation( ComputerCraft.MOD_ID, mainModel );
-        ModelBakery.registerItemVariants( item, mainLocation );
-
-        final ModelResourceLocation mainModelLocation = new ModelResourceLocation( mainLocation, "inventory" );
-        ModelLoader.setCustomMeshDefinition( item, new ItemMeshDefinition()
-        {
-            @Nonnull
-            @Override
-            public ModelResourceLocation getModelLocation( @Nonnull ItemStack stack )
-            {
-                return mainModelLocation;
-            }
-        } );
-    }
-
-    private static void loadBlockModel( ModelBakeEvent event, String name )
-    {
-        IModel model = ModelLoaderRegistry.getModelOrMissing( new ResourceLocation( ComputerCraft.MOD_ID, "block/" + name ) );
-        IBakedModel bakedModel = model.bake(
-            model.getDefaultState(), DefaultVertexFormats.ITEM,
-            location -> Minecraft.getMinecraft().getTextureMapBlocks().getAtlasSprite( location.toString() )
+        return model.bake(
+            loader,
+            ModelLoader.defaultTextureGetter(),
+            new BasicState( model.getDefaultState(), false ), DefaultVertexFormats.BLOCK
         );
-
-        event.getModelRegistry().putObject( new ModelResourceLocation( ComputerCraft.MOD_ID + ":" + name, "inventory" ), bakedModel );
     }
 }

src/main/java/dan200/computercraft/client/ClientTableFormatter.java

@@ -1,8 +1,9 @@
 /*
  * This file is part of ComputerCraft - http://www.computercraft.info
- * Copyright Daniel Ratcliffe, 2011-2020. Do not distribute without permission.
+ * Copyright Daniel Ratcliffe, 2011-2019. Do not distribute without permission.
  * Send enquiries to dratcliffe@gmail.com
  */
+
 package dan200.computercraft.client;
 
 import dan200.computercraft.shared.command.text.ChatHelpers;
@@ -11,8 +12,8 @@ import dan200.computercraft.shared.command.text.TableFormatter;
 import it.unimi.dsi.fastutil.ints.Int2IntOpenHashMap;
 import net.minecraft.client.Minecraft;
 import net.minecraft.client.gui.FontRenderer;
-import net.minecraft.client.gui.GuiNewChat;
-import net.minecraft.client.gui.GuiUtilRenderComponents;
+import net.minecraft.client.gui.NewChatGui;
+import net.minecraft.client.gui.RenderComponentsUtil;
 import net.minecraft.util.math.MathHelper;
 import net.minecraft.util.text.ITextComponent;
 import net.minecraft.util.text.TextFormatting;
@@ -29,7 +30,7 @@ public class ClientTableFormatter implements TableFormatter
 
     private static FontRenderer renderer()
     {
-        return Minecraft.getMinecraft().fontRenderer;
+        return Minecraft.getInstance().fontRenderer;
     }
 
     @Override
@@ -41,7 +42,7 @@ public class ClientTableFormatter implements TableFormatter
 
         FontRenderer renderer = renderer();
 
-        float spaceWidth = renderer.getCharWidth( ' ' );
+        float spaceWidth = renderer.getStringWidth( " " );
         int spaces = MathHelper.floor( extraWidth / spaceWidth );
         int extra = extraWidth - (int) (spaces * spaceWidth);
 
@@ -63,19 +64,19 @@ public class ClientTableFormatter implements TableFormatter
     @Override
     public void writeLine( int id, ITextComponent component )
     {
-        Minecraft mc = Minecraft.getMinecraft();
-        GuiNewChat chat = mc.ingameGUI.getChatGUI();
+        Minecraft mc = Minecraft.getInstance();
+        NewChatGui chat = mc.ingameGUI.getChatGUI();
 
         // Trim the text if it goes over the allowed length
-        int maxWidth = MathHelper.floor( chat.getChatWidth() / chat.getChatScale() );
-        List<ITextComponent> list = GuiUtilRenderComponents.splitText( component, maxWidth, mc.fontRenderer, false, false );
+        int maxWidth = MathHelper.floor( chat.getChatWidth() / chat.getScale() );
+        List<ITextComponent> list = RenderComponentsUtil.splitText( component, maxWidth, mc.fontRenderer, false, false );
         if( !list.isEmpty() ) chat.printChatMessageWithOptionalDeletion( list.get( 0 ), id );
     }
 
     @Override
     public int display( TableBuilder table )
     {
-        GuiNewChat chat = Minecraft.getMinecraft().ingameGUI.getChatGUI();
+        NewChatGui chat = Minecraft.getInstance().ingameGUI.getChatGUI();
 
         int lastHeight = lastHeights.get( table.getId() );
 

src/main/java/dan200/computercraft/client/FrameInfo.java

@@ -1,17 +1,18 @@
 /*
  * This file is part of ComputerCraft - http://www.computercraft.info
- * Copyright Daniel Ratcliffe, 2011-2020. Do not distribute without permission.
+ * Copyright Daniel Ratcliffe, 2011-2019. Do not distribute without permission.
  * Send enquiries to dratcliffe@gmail.com
  */
+
 package dan200.computercraft.client;
 
 import dan200.computercraft.ComputerCraft;
+import net.minecraftforge.api.distmarker.Dist;
+import net.minecraftforge.event.TickEvent;
+import net.minecraftforge.eventbus.api.SubscribeEvent;
 import net.minecraftforge.fml.common.Mod;
-import net.minecraftforge.fml.common.eventhandler.SubscribeEvent;
-import net.minecraftforge.fml.common.gameevent.TickEvent;
-import net.minecraftforge.fml.relauncher.Side;
 
-@Mod.EventBusSubscriber( modid = ComputerCraft.MOD_ID, value = Side.CLIENT )
+@Mod.EventBusSubscriber( modid = ComputerCraft.MOD_ID, value = Dist.CLIENT )
 public final class FrameInfo
 {
     private static int tick;

src/main/java/dan200/computercraft/client/gui/FixedWidthFontRenderer.java

@@ -1,15 +1,16 @@
 /*
  * This file is part of ComputerCraft - http://www.computercraft.info
- * Copyright Daniel Ratcliffe, 2011-2020. Do not distribute without permission.
+ * Copyright Daniel Ratcliffe, 2011-2019. Do not distribute without permission.
  * Send enquiries to dratcliffe@gmail.com
  */
+
 package dan200.computercraft.client.gui;
 
+import com.mojang.blaze3d.platform.GlStateManager;
 import dan200.computercraft.core.terminal.TextBuffer;
 import dan200.computercraft.shared.util.Palette;
 import net.minecraft.client.Minecraft;
 import net.minecraft.client.renderer.BufferBuilder;
-import net.minecraft.client.renderer.GlStateManager;
 import net.minecraft.client.renderer.Tessellator;
 import net.minecraft.client.renderer.texture.TextureManager;
 import net.minecraft.client.renderer.vertex.DefaultVertexFormats;
@@ -38,7 +39,7 @@ public final class FixedWidthFontRenderer
 
     private FixedWidthFontRenderer()
     {
-        m_textureManager = Minecraft.getMinecraft().getTextureManager();
+        m_textureManager = Minecraft.getInstance().getTextureManager();
     }
 
     private static void greyscaleify( double[] rgb )
@@ -128,9 +129,9 @@ public final class FixedWidthFontRenderer
             }
             drawQuad( renderer, x + i * FONT_WIDTH, y, colour, FONT_WIDTH, p, greyScale );
         }
-        GlStateManager.disableTexture2D();
+        GlStateManager.disableTexture();
         tessellator.draw();
-        GlStateManager.enableTexture2D();
+        GlStateManager.enableTexture();
     }
 
     public void drawStringTextPart( int x, int y, TextBuffer s, TextBuffer textColour, boolean greyScale, Palette p )
@@ -194,6 +195,6 @@ public final class FixedWidthFontRenderer
     public void bindFont()
     {
         m_textureManager.bindTexture( FONT );
-        GlStateManager.glTexParameteri( GL11.GL_TEXTURE_2D, GL11.GL_TEXTURE_WRAP_S, GL11.GL_CLAMP );
+        GlStateManager.texParameter( GL11.GL_TEXTURE_2D, GL11.GL_TEXTURE_WRAP_S, GL11.GL_CLAMP );
     }
 }

src/main/java/dan200/computercraft/client/gui/GuiComputer.java

@@ -1,29 +1,30 @@
 /*
  * This file is part of ComputerCraft - http://www.computercraft.info
- * Copyright Daniel Ratcliffe, 2011-2020. Do not distribute without permission.
+ * Copyright Daniel Ratcliffe, 2011-2019. Do not distribute without permission.
  * Send enquiries to dratcliffe@gmail.com
  */
+
 package dan200.computercraft.client.gui;
 
+import com.mojang.blaze3d.platform.GlStateManager;
 import dan200.computercraft.ComputerCraft;
 import dan200.computercraft.client.gui.widgets.WidgetTerminal;
-import dan200.computercraft.shared.computer.blocks.TileComputer;
+import dan200.computercraft.client.gui.widgets.WidgetWrapper;
 import dan200.computercraft.shared.computer.core.ClientComputer;
 import dan200.computercraft.shared.computer.core.ComputerFamily;
-import dan200.computercraft.shared.computer.core.IComputer;
 import dan200.computercraft.shared.computer.inventory.ContainerComputer;
-import net.minecraft.client.gui.inventory.GuiContainer;
-import net.minecraft.client.renderer.GlStateManager;
-import net.minecraft.inventory.Container;
+import dan200.computercraft.shared.computer.inventory.ContainerComputerBase;
+import dan200.computercraft.shared.computer.inventory.ContainerViewComputer;
+import dan200.computercraft.shared.pocket.inventory.ContainerPocketComputer;
+import net.minecraft.client.gui.screen.inventory.ContainerScreen;
+import net.minecraft.entity.player.PlayerInventory;
 import net.minecraft.util.ResourceLocation;
-import org.lwjgl.input.Keyboard;
-import org.lwjgl.input.Mouse;
+import net.minecraft.util.text.ITextComponent;
+import org.lwjgl.glfw.GLFW;
 
-import java.io.IOException;
-
-public class GuiComputer extends GuiContainer
+public final class GuiComputer<T extends ContainerComputerBase> extends ContainerScreen<T>
 {
-    public static final ResourceLocation BACKGROUND_NORMAL = new ResourceLocation( ComputerCraft.MOD_ID, "textures/gui/corners.png" );
+    public static final ResourceLocation BACKGROUND_NORMAL = new ResourceLocation( ComputerCraft.MOD_ID, "textures/gui/corners_normal.png" );
     public static final ResourceLocation BACKGROUND_ADVANCED = new ResourceLocation( ComputerCraft.MOD_ID, "textures/gui/corners_advanced.png" );
     public static final ResourceLocation BACKGROUND_COMMAND = new ResourceLocation( ComputerCraft.MOD_ID, "textures/gui/corners_command.png" );
     public static final ResourceLocation BACKGROUND_COLOUR = new ResourceLocation( ComputerCraft.MOD_ID, "textures/gui/corners_colour.png" );
@@ -32,151 +33,147 @@ public class GuiComputer extends GuiContainer
     private final ClientComputer m_computer;
     private final int m_termWidth;
     private final int m_termHeight;
-    private WidgetTerminal m_terminal;
 
-    public GuiComputer( Container container, ComputerFamily family, ClientComputer computer, int termWidth, int termHeight )
+    private WidgetTerminal terminal;
+    private WidgetWrapper terminalWrapper;
+
+    private GuiComputer(
+        T container, PlayerInventory player, ITextComponent title, int termWidth, int termHeight
+    )
     {
-        super( container );
-        m_family = family;
-        m_computer = computer;
+        super( container, player, title );
+        m_family = container.getFamily();
+        m_computer = (ClientComputer) container.getComputer();
         m_termWidth = termWidth;
         m_termHeight = termHeight;
-        m_terminal = null;
+        terminal = null;
     }
 
-    @Deprecated
-    public GuiComputer( Container container, ComputerFamily family, IComputer computer, int termWidth, int termHeight )
+    public static GuiComputer<ContainerComputer> create( ContainerComputer container, PlayerInventory inventory, ITextComponent component )
     {
-        this( container, family, (ClientComputer) computer, termWidth, termHeight );
-    }
-
-    public GuiComputer( TileComputer computer )
-    {
-        this(
-            new ContainerComputer( computer ),
-            computer.getFamily(),
-            computer.createClientComputer(),
-            ComputerCraft.terminalWidth_computer,
-            ComputerCraft.terminalHeight_computer
+        return new GuiComputer<>(
+            container, inventory, component,
+            ComputerCraft.terminalWidth_computer, ComputerCraft.terminalHeight_computer
         );
     }
 
-    @Override
-    public void initGui()
+    public static GuiComputer<ContainerPocketComputer> createPocket( ContainerPocketComputer container, PlayerInventory inventory, ITextComponent component )
     {
-        super.initGui();
-        Keyboard.enableRepeatEvents( true );
+        return new GuiComputer<>(
+            container, inventory, component,
+            ComputerCraft.terminalWidth_pocketComputer, ComputerCraft.terminalHeight_pocketComputer
+        );
+    }
 
-        m_terminal = new WidgetTerminal( 0, 0, m_termWidth, m_termHeight, () -> m_computer, 2, 2, 2, 2 );
-        m_terminal.setAllowFocusLoss( false );
-        xSize = m_terminal.getWidth() + 24;
-        ySize = m_terminal.getHeight() + 24;
+    public static GuiComputer<ContainerViewComputer> createView( ContainerViewComputer container, PlayerInventory inventory, ITextComponent component )
+    {
+        return new GuiComputer<>(
+            container, inventory, component,
+            container.getWidth(), container.getHeight()
+        );
+    }
+
+
+    @Override
+    protected void init()
+    {
+        minecraft.keyboardListener.enableRepeatEvents( true );
+
+        int termPxWidth = m_termWidth * FixedWidthFontRenderer.FONT_WIDTH;
+        int termPxHeight = m_termHeight * FixedWidthFontRenderer.FONT_HEIGHT;
+
+        xSize = termPxWidth + 4 + 24;
+        ySize = termPxHeight + 4 + 24;
+
+        super.init();
+
+        terminal = new WidgetTerminal( minecraft, () -> m_computer, m_termWidth, m_termHeight, 2, 2, 2, 2 );
+        terminalWrapper = new WidgetWrapper( terminal, 2 + 12 + guiLeft, 2 + 12 + guiTop, termPxWidth, termPxHeight );
+
+        children.add( terminalWrapper );
+        setFocused( terminalWrapper );
     }
 
     @Override
-    public void onGuiClosed()
+    public void removed()
     {
-        super.onGuiClosed();
-        Keyboard.enableRepeatEvents( false );
+        super.removed();
+        children.remove( terminal );
+        terminal = null;
+        minecraft.keyboardListener.enableRepeatEvents( false );
     }
 
     @Override
-    public void updateScreen()
+    public void tick()
     {
-        super.updateScreen();
-        m_terminal.update();
+        super.tick();
+        terminal.update();
     }
 
     @Override
-    protected void keyTyped( char c, int k ) throws IOException
+    public boolean keyPressed( int key, int scancode, int modifiers )
     {
-        if( k == 1 )
+        // Forward the tab key to the terminal, rather than moving between controls.
+        if( key == GLFW.GLFW_KEY_TAB && getFocused() != null && getFocused() == terminalWrapper )
         {
-            super.keyTyped( c, k );
-        }
-        else
-        {
-            if( m_terminal.onKeyTyped( c, k ) ) keyHandled = true;
+            return getFocused().keyPressed( key, scancode, modifiers );
         }
+
+        return super.keyPressed( key, scancode, modifiers );
     }
 
     @Override
-    protected void mouseClicked( int x, int y, int button )
-    {
-        int startX = (width - m_terminal.getWidth()) / 2;
-        int startY = (height - m_terminal.getHeight()) / 2;
-        m_terminal.mouseClicked( x - startX, y - startY, button );
-    }
-
-    @Override
-    public void handleMouseInput() throws IOException
-    {
-        super.handleMouseInput();
-
-        int x = Mouse.getEventX() * width / mc.displayWidth;
-        int y = height - Mouse.getEventY() * height / mc.displayHeight - 1;
-        int startX = (width - m_terminal.getWidth()) / 2;
-        int startY = (height - m_terminal.getHeight()) / 2;
-        m_terminal.handleMouseInput( x - startX, y - startY );
-    }
-
-    @Override
-    public void handleKeyboardInput() throws IOException
-    {
-        super.handleKeyboardInput();
-        if( m_terminal.onKeyboardInput() ) keyHandled = true;
-    }
-
-    @Override
-    protected void drawGuiContainerForegroundLayer( int par1, int par2 )
-    {
-    }
-
-    @Override
-    protected void drawGuiContainerBackgroundLayer( float var1, int var2, int var3 )
-    {
-    }
-
-    @Override
-    public void drawScreen( int mouseX, int mouseY, float partialTicks )
+    public void drawGuiContainerBackgroundLayer( float partialTicks, int mouseX, int mouseY )
     {
         // Work out where to draw
-        int startX = (width - m_terminal.getWidth()) / 2;
-        int startY = (height - m_terminal.getHeight()) / 2;
-        int endX = startX + m_terminal.getWidth();
-        int endY = startY + m_terminal.getHeight();
-
-        // Draw background
-        drawDefaultBackground();
+        int startX = terminalWrapper.getX() - 2;
+        int startY = terminalWrapper.getY() - 2;
+        int endX = startX + terminalWrapper.getWidth() + 4;
+        int endY = startY + terminalWrapper.getHeight() + 4;
 
         // Draw terminal
-        m_terminal.draw( mc, startX, startY, mouseX, mouseY );
+        terminal.draw( terminalWrapper.getX(), terminalWrapper.getY() );
 
         // Draw a border around the terminal
-        GlStateManager.color( 1.0f, 1.0f, 1.0f, 1.0f );
+        GlStateManager.color4f( 1.0f, 1.0f, 1.0f, 1.0f );
         switch( m_family )
         {
             case Normal:
             default:
-                mc.getTextureManager().bindTexture( BACKGROUND_NORMAL );
+                minecraft.getTextureManager().bindTexture( BACKGROUND_NORMAL );
                 break;
             case Advanced:
-                mc.getTextureManager().bindTexture( BACKGROUND_ADVANCED );
+                minecraft.getTextureManager().bindTexture( BACKGROUND_ADVANCED );
                 break;
             case Command:
-                mc.getTextureManager().bindTexture( BACKGROUND_COMMAND );
+                minecraft.getTextureManager().bindTexture( BACKGROUND_COMMAND );
                 break;
         }
 
-        drawTexturedModalRect( startX - 12, startY - 12, 12, 28, 12, 12 );
-        drawTexturedModalRect( startX - 12, endY, 12, 40, 12, 12 );
-        drawTexturedModalRect( endX, startY - 12, 24, 28, 12, 12 );
-        drawTexturedModalRect( endX, endY, 24, 40, 12, 12 );
+        blit( startX - 12, startY - 12, 12, 28, 12, 12 );
+        blit( startX - 12, endY, 12, 40, 12, 12 );
+        blit( endX, startY - 12, 24, 28, 12, 12 );
+        blit( endX, endY, 24, 40, 12, 12 );
 
-        drawTexturedModalRect( startX, startY - 12, 0, 0, endX - startX, 12 );
-        drawTexturedModalRect( startX, endY, 0, 12, endX - startX, 12 );
+        blit( startX, startY - 12, 0, 0, endX - startX, 12 );
+        blit( startX, endY, 0, 12, endX - startX, 12 );
 
-        drawTexturedModalRect( startX - 12, startY, 0, 28, 12, endY - startY );
-        drawTexturedModalRect( endX, startY, 36, 28, 12, endY - startY );
+        blit( startX - 12, startY, 0, 28, 12, endY - startY );
+        blit( endX, startY, 36, 28, 12, endY - startY );
+    }
+
+    @Override
+    public void render( int mouseX, int mouseY, float partialTicks )
+    {
+        renderBackground();
+        super.render( mouseX, mouseY, partialTicks );
+        renderHoveredToolTip( mouseX, mouseY );
+    }
+
+    @Override
+    public boolean mouseDragged( double x, double y, int button, double deltaX, double deltaY )
+    {
+        return (getFocused() != null && getFocused().mouseDragged( x, y, button, deltaX, deltaY ))
+            || super.mouseDragged( x, y, button, deltaX, deltaY );
     }
 }

src/main/java/dan200/computercraft/client/gui/GuiConfigCC.java

@@ -1,49 +0,0 @@
-/*
- * This file is part of ComputerCraft - http://www.computercraft.info
- * Copyright Daniel Ratcliffe, 2011-2020. Do not distribute without permission.
- * Send enquiries to dratcliffe@gmail.com
- */
-package dan200.computercraft.client.gui;
-
-import dan200.computercraft.ComputerCraft;
-import dan200.computercraft.shared.Config;
-import net.minecraft.client.Minecraft;
-import net.minecraft.client.gui.GuiScreen;
-import net.minecraftforge.fml.client.IModGuiFactory;
-import net.minecraftforge.fml.client.config.GuiConfig;
-
-import java.util.Set;
-
-public class GuiConfigCC extends GuiConfig
-{
-    public GuiConfigCC( GuiScreen parentScreen )
-    {
-        super( parentScreen, Config.getConfigElements(), ComputerCraft.MOD_ID, false, false, "CC: Tweaked" );
-    }
-
-    public static class Factory implements IModGuiFactory
-    {
-        @Override
-        public void initialize( Minecraft minecraft )
-        {
-        }
-
-        @Override
-        public boolean hasConfigGui()
-        {
-            return true;
-        }
-
-        @Override
-        public GuiScreen createConfigGui( GuiScreen parentScreen )
-        {
-            return new GuiConfigCC( parentScreen );
-        }
-
-        @Override
-        public Set<RuntimeOptionCategoryElement> runtimeGuiCategories()
-        {
-            return null;
-        }
-    }
-}

src/main/java/dan200/computercraft/client/gui/GuiDiskDrive.java

@@ -1,49 +1,48 @@
 /*
  * This file is part of ComputerCraft - http://www.computercraft.info
- * Copyright Daniel Ratcliffe, 2011-2020. Do not distribute without permission.
+ * Copyright Daniel Ratcliffe, 2011-2019. Do not distribute without permission.
  * Send enquiries to dratcliffe@gmail.com
  */
+
 package dan200.computercraft.client.gui;
 
+import com.mojang.blaze3d.platform.GlStateManager;
 import dan200.computercraft.shared.peripheral.diskdrive.ContainerDiskDrive;
-import net.minecraft.client.gui.inventory.GuiContainer;
-import net.minecraft.client.renderer.GlStateManager;
-import net.minecraft.client.resources.I18n;
+import net.minecraft.client.gui.screen.inventory.ContainerScreen;
+import net.minecraft.entity.player.PlayerInventory;
 import net.minecraft.util.ResourceLocation;
+import net.minecraft.util.text.ITextComponent;
 
-public class GuiDiskDrive extends GuiContainer
+public class GuiDiskDrive extends ContainerScreen<ContainerDiskDrive>
 {
-    private static final ResourceLocation BACKGROUND = new ResourceLocation( "computercraft", "textures/gui/diskdrive.png" );
+    private static final ResourceLocation BACKGROUND = new ResourceLocation( "computercraft", "textures/gui/disk_drive.png" );
 
-    private final ContainerDiskDrive m_container;
-
-    public GuiDiskDrive( ContainerDiskDrive container )
+    public GuiDiskDrive( ContainerDiskDrive container, PlayerInventory player, ITextComponent title )
     {
-        super( container );
-        m_container = container;
+        super( container, player, title );
     }
 
     @Override
     protected void drawGuiContainerForegroundLayer( int mouseX, int mouseY )
     {
-        String title = m_container.getDiskDrive().getDisplayName().getUnformattedText();
-        fontRenderer.drawString( title, (xSize - fontRenderer.getStringWidth( title )) / 2, 6, 0x404040 );
-        fontRenderer.drawString( I18n.format( "container.inventory" ), 8, ySize - 96 + 2, 0x404040 );
+        String title = this.title.getFormattedText();
+        font.drawString( title, (xSize - font.getStringWidth( title )) / 2.0f, 6, 0x404040 );
+        font.drawString( title, 8, ySize - 96 + 2, 0x404040 );
     }
 
     @Override
     protected void drawGuiContainerBackgroundLayer( float partialTicks, int mouseX, int mouseY )
     {
-        GlStateManager.color( 1.0F, 1.0F, 1.0F, 1.0F );
-        mc.getTextureManager().bindTexture( BACKGROUND );
-        drawTexturedModalRect( guiLeft, guiTop, 0, 0, xSize, ySize );
+        GlStateManager.color4f( 1.0F, 1.0F, 1.0F, 1.0F );
+        minecraft.getTextureManager().bindTexture( BACKGROUND );
+        blit( guiLeft, guiTop, 0, 0, xSize, ySize );
     }
 
     @Override
-    public void drawScreen( int mouseX, int mouseY, float partialTicks )
+    public void render( int mouseX, int mouseY, float partialTicks )
     {
-        drawDefaultBackground();
-        super.drawScreen( mouseX, mouseY, partialTicks );
+        renderBackground();
+        super.render( mouseX, mouseY, partialTicks );
         renderHoveredToolTip( mouseX, mouseY );
     }
 }

src/main/java/dan200/computercraft/client/gui/GuiPocketComputer.java

@@ -1,24 +0,0 @@
-/*
- * This file is part of ComputerCraft - http://www.computercraft.info
- * Copyright Daniel Ratcliffe, 2011-2020. Do not distribute without permission.
- * Send enquiries to dratcliffe@gmail.com
- */
-package dan200.computercraft.client.gui;
-
-import dan200.computercraft.ComputerCraft;
-import dan200.computercraft.shared.media.inventory.ContainerHeldItem;
-import dan200.computercraft.shared.pocket.items.ItemPocketComputer;
-
-public class GuiPocketComputer extends GuiComputer
-{
-    public GuiPocketComputer( ContainerHeldItem container )
-    {
-        super(
-            container,
-            ComputerCraft.Items.pocketComputer.getFamily( container.getStack() ),
-            ItemPocketComputer.createClientComputer( container.getStack() ),
-            ComputerCraft.terminalWidth_pocketComputer,
-            ComputerCraft.terminalHeight_pocketComputer
-        );
-    }
-}

src/main/java/dan200/computercraft/client/gui/GuiPrinter.java

@@ -1,51 +1,51 @@
 /*
  * This file is part of ComputerCraft - http://www.computercraft.info
- * Copyright Daniel Ratcliffe, 2011-2020. Do not distribute without permission.
+ * Copyright Daniel Ratcliffe, 2011-2019. Do not distribute without permission.
  * Send enquiries to dratcliffe@gmail.com
  */
+
 package dan200.computercraft.client.gui;
 
+import com.mojang.blaze3d.platform.GlStateManager;
 import dan200.computercraft.shared.peripheral.printer.ContainerPrinter;
-import net.minecraft.client.gui.inventory.GuiContainer;
-import net.minecraft.client.renderer.GlStateManager;
+import net.minecraft.client.gui.screen.inventory.ContainerScreen;
 import net.minecraft.client.resources.I18n;
+import net.minecraft.entity.player.PlayerInventory;
 import net.minecraft.util.ResourceLocation;
+import net.minecraft.util.text.ITextComponent;
 
-public class GuiPrinter extends GuiContainer
+public class GuiPrinter extends ContainerScreen<ContainerPrinter>
 {
     private static final ResourceLocation BACKGROUND = new ResourceLocation( "computercraft", "textures/gui/printer.png" );
 
-    private final ContainerPrinter container;
-
-    public GuiPrinter( ContainerPrinter container )
+    public GuiPrinter( ContainerPrinter container, PlayerInventory player, ITextComponent title )
     {
-        super( container );
-        this.container = container;
+        super( container, player, title );
     }
 
     @Override
     protected void drawGuiContainerForegroundLayer( int mouseX, int mouseY )
     {
-        String title = container.getPrinter().getDisplayName().getUnformattedText();
-        fontRenderer.drawString( title, (xSize - fontRenderer.getStringWidth( title )) / 2, 6, 0x404040 );
-        fontRenderer.drawString( I18n.format( "container.inventory" ), 8, ySize - 96 + 2, 0x404040 );
+        String title = getTitle().getFormattedText();
+        font.drawString( title, (xSize - font.getStringWidth( title )) / 2.0f, 6, 0x404040 );
+        font.drawString( I18n.format( "container.inventory" ), 8, ySize - 96 + 2, 0x404040 );
     }
 
     @Override
     protected void drawGuiContainerBackgroundLayer( float partialTicks, int mouseX, int mouseY )
     {
-        GlStateManager.color( 1.0F, 1.0F, 1.0F, 1.0F );
-        mc.getTextureManager().bindTexture( BACKGROUND );
-        drawTexturedModalRect( guiLeft, guiTop, 0, 0, xSize, ySize );
+        GlStateManager.color4f( 1.0F, 1.0F, 1.0F, 1.0F );
+        minecraft.getTextureManager().bindTexture( BACKGROUND );
+        blit( guiLeft, guiTop, 0, 0, xSize, ySize );
 
-        if( container.isPrinting() ) drawTexturedModalRect( guiLeft + 34, guiTop + 21, 176, 0, 25, 45 );
+        if( getContainer().isPrinting() ) blit( guiLeft + 34, guiTop + 21, 176, 0, 25, 45 );
     }
 
     @Override
-    public void drawScreen( int mouseX, int mouseY, float partialTicks )
+    public void render( int mouseX, int mouseY, float partialTicks )
     {
-        drawDefaultBackground();
-        super.drawScreen( mouseX, mouseY, partialTicks );
+        renderBackground();
+        super.render( mouseX, mouseY, partialTicks );
         renderHoveredToolTip( mouseX, mouseY );
     }
 }

src/main/java/dan200/computercraft/client/gui/GuiPrintout.java

@@ -1,22 +1,23 @@
 /*
  * This file is part of ComputerCraft - http://www.computercraft.info
- * Copyright Daniel Ratcliffe, 2011-2020. Do not distribute without permission.
+ * Copyright Daniel Ratcliffe, 2011-2019. Do not distribute without permission.
  * Send enquiries to dratcliffe@gmail.com
  */
+
 package dan200.computercraft.client.gui;
 
+import com.mojang.blaze3d.platform.GlStateManager;
 import dan200.computercraft.core.terminal.TextBuffer;
-import dan200.computercraft.shared.media.inventory.ContainerHeldItem;
+import dan200.computercraft.shared.common.ContainerHeldItem;
 import dan200.computercraft.shared.media.items.ItemPrintout;
-import net.minecraft.client.gui.inventory.GuiContainer;
-import net.minecraft.client.renderer.GlStateManager;
-import org.lwjgl.input.Mouse;
-
-import java.io.IOException;
+import net.minecraft.client.gui.screen.inventory.ContainerScreen;
+import net.minecraft.entity.player.PlayerInventory;
+import net.minecraft.util.text.ITextComponent;
+import org.lwjgl.glfw.GLFW;
 
 import static dan200.computercraft.client.render.PrintoutRenderer.*;
 
-public class GuiPrintout extends GuiContainer
+public class GuiPrintout extends ContainerScreen<ContainerHeldItem>
 {
     private final boolean m_book;
     private final int m_pages;
@@ -24,9 +25,9 @@ public class GuiPrintout extends GuiContainer
     private final TextBuffer[] m_colours;
     private int m_page;
 
-    public GuiPrintout( ContainerHeldItem container )
+    public GuiPrintout( ContainerHeldItem container, PlayerInventory player, ITextComponent title )
     {
-        super( container );
+        super( container, player, title );
 
         ySize = Y_SIZE;
 
@@ -40,63 +41,70 @@ public class GuiPrintout extends GuiContainer
 
         m_page = 0;
         m_pages = Math.max( m_text.length / ItemPrintout.LINES_PER_PAGE, 1 );
-        m_book = ItemPrintout.getType( container.getStack() ) == ItemPrintout.Type.Book;
+        m_book = ((ItemPrintout) container.getStack().getItem()).getType() == ItemPrintout.Type.BOOK;
     }
 
     @Override
-    protected void keyTyped( char c, int k ) throws IOException
+    public boolean keyPressed( int key, int scancode, int modifiers )
     {
-        super.keyTyped( c, k );
+        if( super.keyPressed( key, scancode, modifiers ) ) return true;
 
-        if( k == 205 )
+        if( key == GLFW.GLFW_KEY_RIGHT )
         {
-            // Right
             if( m_page < m_pages - 1 ) m_page++;
+            return true;
         }
-        else if( k == 203 )
+
+        if( key == GLFW.GLFW_KEY_LEFT )
         {
-            // Left
             if( m_page > 0 ) m_page--;
+            return true;
         }
+
+        return false;
     }
 
     @Override
-    public void handleMouseInput() throws IOException
+    public boolean mouseScrolled( double x, double y, double delta )
     {
-        super.handleMouseInput();
-
-        int mouseWheelChange = Mouse.getEventDWheel();
-        if( mouseWheelChange < 0 )
+        if( super.mouseScrolled( x, y, delta ) ) return true;
+        if( delta < 0 )
         {
             // Scroll up goes to the next page
             if( m_page < m_pages - 1 ) m_page++;
+            return true;
         }
-        else if( mouseWheelChange > 0 )
+
+        if( delta > 0 )
         {
             // Scroll down goes to the previous page
             if( m_page > 0 ) m_page--;
+            return true;
         }
+
+        return false;
     }
 
     @Override
-    protected void drawGuiContainerBackgroundLayer( float partialTicks, int mouseX, int mouseY )
+    public void drawGuiContainerBackgroundLayer( float partialTicks, int mouseX, int mouseY )
     {
         // Draw the printout
-        GlStateManager.color( 1.0f, 1.0f, 1.0f, 1.0f );
+        GlStateManager.color4f( 1.0f, 1.0f, 1.0f, 1.0f );
+        GlStateManager.enableDepthTest();
 
-        drawBorder( guiLeft, guiTop, zLevel, m_page, m_pages, m_book );
+        drawBorder( guiLeft, guiTop, blitOffset, m_page, m_pages, m_book );
         drawText( guiLeft + X_TEXT_MARGIN, guiTop + Y_TEXT_MARGIN, ItemPrintout.LINES_PER_PAGE * m_page, m_text, m_colours );
     }
 
     @Override
-    public void drawScreen( int mouseX, int mouseY, float partialTicks )
+    public void render( int mouseX, int mouseY, float partialTicks )
     {
         // We must take the background further back in order to not overlap with our printed pages.
-        zLevel--;
-        drawDefaultBackground();
-        zLevel++;
+        blitOffset--;
+        renderBackground();
+        blitOffset++;
 
-        super.drawScreen( mouseX, mouseY, partialTicks );
+        super.render( mouseX, mouseY, partialTicks );
         renderHoveredToolTip( mouseX, mouseY );
     }
 }

src/main/java/dan200/computercraft/client/gui/GuiTurtle.java

@@ -1,125 +1,109 @@
 /*
  * This file is part of ComputerCraft - http://www.computercraft.info
- * Copyright Daniel Ratcliffe, 2011-2020. Do not distribute without permission.
+ * Copyright Daniel Ratcliffe, 2011-2019. Do not distribute without permission.
  * Send enquiries to dratcliffe@gmail.com
  */
+
 package dan200.computercraft.client.gui;
 
+import com.mojang.blaze3d.platform.GlStateManager;
 import dan200.computercraft.ComputerCraft;
 import dan200.computercraft.client.gui.widgets.WidgetTerminal;
+import dan200.computercraft.client.gui.widgets.WidgetWrapper;
 import dan200.computercraft.shared.computer.core.ClientComputer;
 import dan200.computercraft.shared.computer.core.ComputerFamily;
-import dan200.computercraft.shared.turtle.blocks.TileTurtle;
 import dan200.computercraft.shared.turtle.inventory.ContainerTurtle;
-import net.minecraft.client.Minecraft;
-import net.minecraft.client.gui.inventory.GuiContainer;
-import net.minecraft.client.renderer.GlStateManager;
+import net.minecraft.client.gui.screen.inventory.ContainerScreen;
+import net.minecraft.entity.player.PlayerInventory;
 import net.minecraft.util.ResourceLocation;
-import org.lwjgl.input.Keyboard;
-import org.lwjgl.input.Mouse;
+import net.minecraft.util.text.ITextComponent;
+import org.lwjgl.glfw.GLFW;
 
-import java.io.IOException;
-
-public class GuiTurtle extends GuiContainer
+public class GuiTurtle extends ContainerScreen<ContainerTurtle>
 {
-    private static final ResourceLocation BACKGROUND_NORMAL = new ResourceLocation( "computercraft", "textures/gui/turtle.png" );
+    private static final ResourceLocation BACKGROUND_NORMAL = new ResourceLocation( "computercraft", "textures/gui/turtle_normal.png" );
     private static final ResourceLocation BACKGROUND_ADVANCED = new ResourceLocation( "computercraft", "textures/gui/turtle_advanced.png" );
 
     private ContainerTurtle m_container;
 
     private final ComputerFamily m_family;
     private final ClientComputer m_computer;
-    private WidgetTerminal m_terminalGui;
 
-    public GuiTurtle( TileTurtle turtle, ContainerTurtle container )
+    private WidgetTerminal terminal;
+    private WidgetWrapper terminalWrapper;
+
+    public GuiTurtle( ContainerTurtle container, PlayerInventory player, ITextComponent title )
     {
-        super( container );
+        super( container, player, title );
 
         m_container = container;
-        m_family = turtle.getFamily();
-        m_computer = turtle.getClientComputer();
+        m_family = container.getFamily();
+        m_computer = (ClientComputer) container.getComputer();
 
         xSize = 254;
         ySize = 217;
     }
 
     @Override
-    public void initGui()
+    protected void init()
     {
-        super.initGui();
-        Keyboard.enableRepeatEvents( true );
-        m_terminalGui = new WidgetTerminal(
-            guiLeft + 8,
-            guiTop + 8,
+        super.init();
+        minecraft.keyboardListener.enableRepeatEvents( true );
+
+        int termPxWidth = ComputerCraft.terminalWidth_turtle * FixedWidthFontRenderer.FONT_WIDTH;
+        int termPxHeight = ComputerCraft.terminalHeight_turtle * FixedWidthFontRenderer.FONT_HEIGHT;
+
+        terminal = new WidgetTerminal(
+            minecraft, () -> m_computer,
             ComputerCraft.terminalWidth_turtle,
             ComputerCraft.terminalHeight_turtle,
-            () -> m_computer,
             2, 2, 2, 2
         );
-        m_terminalGui.setAllowFocusLoss( false );
+        terminalWrapper = new WidgetWrapper( terminal, 2 + 8 + guiLeft, 2 + 8 + guiTop, termPxWidth, termPxHeight );
+
+        children.add( terminalWrapper );
+        setFocused( terminalWrapper );
     }
 
     @Override
-    public void onGuiClosed()
+    public void removed()
     {
-        super.onGuiClosed();
-        Keyboard.enableRepeatEvents( false );
+        super.removed();
+        children.remove( terminal );
+        terminal = null;
+        minecraft.keyboardListener.enableRepeatEvents( false );
     }
 
     @Override
-    public void updateScreen()
+    public void tick()
     {
-        super.updateScreen();
-        m_terminalGui.update();
+        super.tick();
+        terminal.update();
     }
 
     @Override
-    protected void keyTyped( char c, int k ) throws IOException
+    public boolean keyPressed( int key, int scancode, int modifiers )
     {
-        if( k == 1 )
+        // Forward the tab key to the terminal, rather than moving between controls.
+        if( key == GLFW.GLFW_KEY_TAB && getFocused() != null && getFocused() == terminalWrapper )
         {
-            super.keyTyped( c, k );
-        }
-        else
-        {
-            if( m_terminalGui.onKeyTyped( c, k ) ) keyHandled = true;
+            return getFocused().keyPressed( key, scancode, modifiers );
         }
+
+        return super.keyPressed( key, scancode, modifiers );
     }
 
-    @Override
-    protected void mouseClicked( int x, int y, int button ) throws IOException
-    {
-        super.mouseClicked( x, y, button );
-        m_terminalGui.mouseClicked( x, y, button );
-    }
-
-    @Override
-    public void handleMouseInput() throws IOException
-    {
-        super.handleMouseInput();
-        int x = Mouse.getEventX() * width / mc.displayWidth;
-        int y = height - Mouse.getEventY() * height / mc.displayHeight - 1;
-        m_terminalGui.handleMouseInput( x, y );
-    }
-
-    @Override
-    public void handleKeyboardInput() throws IOException
-    {
-        super.handleKeyboardInput();
-        if( m_terminalGui.onKeyboardInput() ) keyHandled = true;
-    }
-
-    protected void drawSelectionSlot( boolean advanced )
+    private void drawSelectionSlot( boolean advanced )
     {
         // Draw selection slot
         int slot = m_container.getSelectedSlot();
         if( slot >= 0 )
         {
-            GlStateManager.color( 1.0F, 1.0F, 1.0F, 1.0F );
+            GlStateManager.color4f( 1.0F, 1.0F, 1.0F, 1.0F );
             int slotX = slot % 4;
             int slotY = slot / 4;
-            mc.getTextureManager().bindTexture( advanced ? BACKGROUND_ADVANCED : BACKGROUND_NORMAL );
-            drawTexturedModalRect( guiLeft + m_container.turtleInvStartX - 2 + slotX * 18, guiTop + m_container.playerInvStartY - 2 + slotY * 18, 0, 217, 24, 24 );
+            minecraft.getTextureManager().bindTexture( advanced ? BACKGROUND_ADVANCED : BACKGROUND_NORMAL );
+            blit( guiLeft + ContainerTurtle.TURTLE_START_X - 2 + slotX * 18, guiTop + ContainerTurtle.PLAYER_START_Y - 2 + slotY * 18, 0, 217, 24, 24 );
         }
     }
 
@@ -128,21 +112,28 @@ public class GuiTurtle extends GuiContainer
     {
         // Draw term
         boolean advanced = m_family == ComputerFamily.Advanced;
-        m_terminalGui.draw( Minecraft.getMinecraft(), 0, 0, mouseX, mouseY );
+        terminal.draw( terminalWrapper.getX(), terminalWrapper.getY() );
 
         // Draw border/inventory
-        GlStateManager.color( 1.0F, 1.0F, 1.0F, 1.0F );
-        mc.getTextureManager().bindTexture( advanced ? BACKGROUND_ADVANCED : BACKGROUND_NORMAL );
-        drawTexturedModalRect( guiLeft, guiTop, 0, 0, xSize, ySize );
+        GlStateManager.color4f( 1.0F, 1.0F, 1.0F, 1.0F );
+        minecraft.getTextureManager().bindTexture( advanced ? BACKGROUND_ADVANCED : BACKGROUND_NORMAL );
+        blit( guiLeft, guiTop, 0, 0, xSize, ySize );
 
         drawSelectionSlot( advanced );
     }
 
     @Override
-    public void drawScreen( int mouseX, int mouseY, float partialTicks )
+    public void render( int mouseX, int mouseY, float partialTicks )
     {
-        drawDefaultBackground();
-        super.drawScreen( mouseX, mouseY, partialTicks );
+        renderBackground();
+        super.render( mouseX, mouseY, partialTicks );
         renderHoveredToolTip( mouseX, mouseY );
     }
+
+    @Override
+    public boolean mouseDragged( double x, double y, int button, double deltaX, double deltaY )
+    {
+        return (getFocused() != null && getFocused().mouseDragged( x, y, button, deltaX, deltaY ))
+            || super.mouseDragged( x, y, button, deltaX, deltaY );
+    }
 }

src/main/java/dan200/computercraft/client/gui/widgets/Widget.java

@@ -1,83 +0,0 @@
-/*
- * This file is part of ComputerCraft - http://www.computercraft.info
- * Copyright Daniel Ratcliffe, 2011-2020. Do not distribute without permission.
- * Send enquiries to dratcliffe@gmail.com
- */
-package dan200.computercraft.client.gui.widgets;
-
-import net.minecraft.client.Minecraft;
-import net.minecraft.client.gui.Gui;
-
-public abstract class Widget extends Gui
-{
-    private int m_xPosition;
-    private int m_yPosition;
-    private int m_width;
-    private int m_height;
-
-    protected Widget( int x, int y, int width, int height )
-    {
-        m_xPosition = x;
-        m_yPosition = y;
-        m_width = width;
-        m_height = height;
-    }
-
-    public int getXPosition()
-    {
-        return m_xPosition;
-    }
-
-    public int getYPosition()
-    {
-        return m_yPosition;
-    }
-
-    public int getWidth()
-    {
-        return m_width;
-    }
-
-    public int getHeight()
-    {
-        return m_height;
-    }
-
-    public void update()
-    {
-    }
-
-    public void draw( Minecraft mc, int xOrigin, int yOrigin, int mouseX, int mouseY )
-    {
-    }
-
-    public void handleMouseInput( int mouseX, int mouseY )
-    {
-    }
-
-    public boolean onKeyboardInput()
-    {
-        return false;
-    }
-
-    @Deprecated
-    public void handleKeyboardInput()
-    {
-        onKeyboardInput();
-    }
-
-    public void mouseClicked( int mouseX, int mouseY, int mouseButton )
-    {
-    }
-
-    public boolean onKeyTyped( char c, int k )
-    {
-        return false;
-    }
-
-    @Deprecated
-    public void keyTyped( char c, int k )
-    {
-        onKeyTyped( c, k );
-    }
-}

src/main/java/dan200/computercraft/client/gui/widgets/WidgetTerminal.java

@@ -1,146 +1,251 @@
 /*
  * This file is part of ComputerCraft - http://www.computercraft.info
- * Copyright Daniel Ratcliffe, 2011-2020. Do not distribute without permission.
+ * Copyright Daniel Ratcliffe, 2011-2019. Do not distribute without permission.
  * Send enquiries to dratcliffe@gmail.com
  */
+
 package dan200.computercraft.client.gui.widgets;
 
+import com.mojang.blaze3d.platform.GlStateManager;
 import dan200.computercraft.client.FrameInfo;
 import dan200.computercraft.client.gui.FixedWidthFontRenderer;
 import dan200.computercraft.core.terminal.Terminal;
 import dan200.computercraft.core.terminal.TextBuffer;
+import dan200.computercraft.shared.computer.core.ClientComputer;
 import dan200.computercraft.shared.computer.core.IComputer;
-import dan200.computercraft.shared.computer.core.IComputerContainer;
 import dan200.computercraft.shared.util.Colour;
 import dan200.computercraft.shared.util.Palette;
 import net.minecraft.client.Minecraft;
-import net.minecraft.client.gui.GuiScreen;
-import net.minecraft.client.renderer.GlStateManager;
-import net.minecraft.util.ChatAllowedCharacters;
-import org.lwjgl.input.Keyboard;
-import org.lwjgl.input.Mouse;
+import net.minecraft.client.gui.IGuiEventListener;
+import net.minecraft.client.renderer.BufferBuilder;
+import net.minecraft.client.renderer.Tessellator;
+import net.minecraft.client.renderer.vertex.DefaultVertexFormats;
+import net.minecraft.util.SharedConstants;
+import org.lwjgl.glfw.GLFW;
+import org.lwjgl.opengl.GL11;
 
-import java.util.ArrayList;
+import java.util.BitSet;
+import java.util.function.Supplier;
 
 import static dan200.computercraft.client.gui.FixedWidthFontRenderer.BACKGROUND;
 
-public class WidgetTerminal extends Widget
+public class WidgetTerminal implements IGuiEventListener
 {
     private static final float TERMINATE_TIME = 0.5f;
 
-    private final IComputerContainer m_computer;
+    private final Minecraft client;
 
-    private float m_terminateTimer = 0.0f;
-    private float m_rebootTimer = 0.0f;
-    private float m_shutdownTimer = 0.0f;
+    private boolean focused;
 
-    private int m_lastClickButton = -1;
-    private int m_lastClickX = -1;
-    private int m_lastClickY = -1;
+    private final Supplier<ClientComputer> computer;
+    private final int termWidth;
+    private final int termHeight;
 
-    private boolean m_focus = false;
-    private boolean m_allowFocusLoss = true;
+    private float terminateTimer = -1;
+    private float rebootTimer = -1;
+    private float shutdownTimer = -1;
 
-    private int m_leftMargin;
-    private int m_rightMargin;
-    private int m_topMargin;
-    private int m_bottomMargin;
+    private int lastMouseButton = -1;
+    private int lastMouseX = -1;
+    private int lastMouseY = -1;
 
-    private final ArrayList<Integer> m_keysDown = new ArrayList<>();
+    private final int leftMargin;
+    private final int rightMargin;
+    private final int topMargin;
+    private final int bottomMargin;
 
-    public WidgetTerminal( int x, int y, int termWidth, int termHeight, IComputerContainer computer, int leftMargin, int rightMargin, int topMargin, int bottomMargin )
+    private final BitSet keysDown = new BitSet( 256 );
+
+    public WidgetTerminal( Minecraft client, Supplier<ClientComputer> computer, int termWidth, int termHeight, int leftMargin, int rightMargin, int topMargin, int bottomMargin )
     {
-        super(
-            x, y,
-            leftMargin + rightMargin + termWidth * FixedWidthFontRenderer.FONT_WIDTH,
-            topMargin + bottomMargin + termHeight * FixedWidthFontRenderer.FONT_HEIGHT
-        );
-
-        m_computer = computer;
-
-        m_leftMargin = leftMargin;
-        m_rightMargin = rightMargin;
-        m_topMargin = topMargin;
-        m_bottomMargin = bottomMargin;
-    }
-
-    public void setAllowFocusLoss( boolean allowFocusLoss )
-    {
-        m_allowFocusLoss = allowFocusLoss;
-        m_focus = m_focus || !allowFocusLoss;
+        this.client = client;
+        this.computer = computer;
+        this.termWidth = termWidth;
+        this.termHeight = termHeight;
+        this.leftMargin = leftMargin;
+        this.rightMargin = rightMargin;
+        this.topMargin = topMargin;
+        this.bottomMargin = bottomMargin;
     }
 
     @Override
-    public boolean onKeyTyped( char ch, int key )
+    public boolean charTyped( char ch, int modifiers )
     {
-        if( m_focus )
+        if( ch >= 32 && ch <= 126 || ch >= 160 && ch <= 255 ) // printable chars in byte range
         {
-            // Ctrl+V for paste
-            if( ch == 22 )
+            // Queue the "char" event
+            queueEvent( "char", Character.toString( ch ) );
+        }
+
+        return true;
+    }
+
+    @Override
+    public boolean keyPressed( int key, int scancode, int modifiers )
+    {
+        if( key == GLFW.GLFW_KEY_ESCAPE ) return false;
+        if( (modifiers & GLFW.GLFW_MOD_CONTROL) != 0 )
+        {
+            switch( key )
             {
-                String clipboard = GuiScreen.getClipboardString();
-                if( clipboard != null )
-                {
-                    // Clip to the first occurrence of \r or \n
-                    int newLineIndex1 = clipboard.indexOf( '\r' );
-                    int newLineIndex2 = clipboard.indexOf( '\n' );
-                    if( newLineIndex1 >= 0 && newLineIndex2 >= 0 )
-                    {
-                        clipboard = clipboard.substring( 0, Math.min( newLineIndex1, newLineIndex2 ) );
-                    }
-                    else if( newLineIndex1 >= 0 )
-                    {
-                        clipboard = clipboard.substring( 0, newLineIndex1 );
-                    }
-                    else if( newLineIndex2 >= 0 )
-                    {
-                        clipboard = clipboard.substring( 0, newLineIndex2 );
-                    }
+                case GLFW.GLFW_KEY_T:
+                    if( terminateTimer < 0 ) terminateTimer = 0;
+                    return true;
+                case GLFW.GLFW_KEY_S:
+                    if( shutdownTimer < 0 ) shutdownTimer = 0;
+                    return true;
+                case GLFW.GLFW_KEY_R:
+                    if( rebootTimer < 0 ) rebootTimer = 0;
+                    return true;
 
-                    // Filter the string
-                    clipboard = ChatAllowedCharacters.filterAllowedCharacters( clipboard );
-
-                    if( !clipboard.isEmpty() )
+                case GLFW.GLFW_KEY_V:
+                    // Ctrl+V for paste
+                    String clipboard = client.keyboardListener.getClipboardString();
+                    if( clipboard != null )
                     {
-                        // Clip to 512 characters
-                        if( clipboard.length() > 512 )
+                        // Clip to the first occurrence of \r or \n
+                        int newLineIndex1 = clipboard.indexOf( "\r" );
+                        int newLineIndex2 = clipboard.indexOf( "\n" );
+                        if( newLineIndex1 >= 0 && newLineIndex2 >= 0 )
                         {
-                            clipboard = clipboard.substring( 0, 512 );
+                            clipboard = clipboard.substring( 0, Math.min( newLineIndex1, newLineIndex2 ) );
+                        }
+                        else if( newLineIndex1 >= 0 )
+                        {
+                            clipboard = clipboard.substring( 0, newLineIndex1 );
+                        }
+                        else if( newLineIndex2 >= 0 )
+                        {
+                            clipboard = clipboard.substring( 0, newLineIndex2 );
                         }
 
-                        // Queue the "paste" event
-                        queueEvent( "paste", new Object[] { clipboard } );
+                        // Filter the string
+                        clipboard = SharedConstants.filterAllowedCharacters( clipboard );
+                        if( !clipboard.isEmpty() )
+                        {
+                            // Clip to 512 characters and queue the event
+                            if( clipboard.length() > 512 ) clipboard = clipboard.substring( 0, 512 );
+                            queueEvent( "paste", clipboard );
+                        }
+
+                        return true;
                     }
-                }
-                return true;
+            }
+        }
+
+        if( key >= 0 && terminateTimer < 0 && rebootTimer < 0 && shutdownTimer < 0 )
+        {
+            // Queue the "key" event and add to the down set
+            boolean repeat = keysDown.get( key );
+            keysDown.set( key );
+            IComputer computer = this.computer.get();
+            if( computer != null ) computer.keyDown( key, repeat );
+        }
+
+        return true;
+    }
+
+    @Override
+    public boolean keyReleased( int key, int scancode, int modifiers )
+    {
+        // Queue the "key_up" event and remove from the down set
+        if( key >= 0 && keysDown.get( key ) )
+        {
+            keysDown.set( key, false );
+            IComputer computer = this.computer.get();
+            if( computer != null ) computer.keyUp( key );
+        }
+
+        switch( key )
+        {
+            case GLFW.GLFW_KEY_T:
+                terminateTimer = -1;
+                break;
+            case GLFW.GLFW_KEY_R:
+                rebootTimer = -1;
+                break;
+            case GLFW.GLFW_KEY_S:
+                shutdownTimer = -1;
+                break;
+            case GLFW.GLFW_KEY_LEFT_CONTROL:
+            case GLFW.GLFW_KEY_RIGHT_CONTROL:
+                terminateTimer = rebootTimer = shutdownTimer = -1;
+                break;
+        }
+
+        return true;
+    }
+
+    @Override
+    public boolean mouseClicked( double mouseX, double mouseY, int button )
+    {
+        ClientComputer computer = this.computer.get();
+        if( computer == null || !computer.isColour() || button < 0 || button > 2 ) return false;
+
+        Terminal term = computer.getTerminal();
+        if( term != null )
+        {
+            int charX = (int) (mouseX / FixedWidthFontRenderer.FONT_WIDTH);
+            int charY = (int) (mouseY / FixedWidthFontRenderer.FONT_HEIGHT);
+            charX = Math.min( Math.max( charX, 0 ), term.getWidth() - 1 );
+            charY = Math.min( Math.max( charY, 0 ), term.getHeight() - 1 );
+
+            computer.mouseClick( button + 1, charX + 1, charY + 1 );
+
+            lastMouseButton = button;
+            lastMouseX = charX;
+            lastMouseY = charY;
+        }
+
+        return true;
+    }
+
+    @Override
+    public boolean mouseReleased( double mouseX, double mouseY, int button )
+    {
+        ClientComputer computer = this.computer.get();
+        if( computer == null || !computer.isColour() || button < 0 || button > 2 ) return false;
+
+        Terminal term = computer.getTerminal();
+        if( term != null )
+        {
+            int charX = (int) (mouseX / FixedWidthFontRenderer.FONT_WIDTH);
+            int charY = (int) (mouseY / FixedWidthFontRenderer.FONT_HEIGHT);
+            charX = Math.min( Math.max( charX, 0 ), term.getWidth() - 1 );
+            charY = Math.min( Math.max( charY, 0 ), term.getHeight() - 1 );
+
+            if( lastMouseButton == button )
+            {
+                computer.mouseUp( lastMouseButton + 1, charX + 1, charY + 1 );
+                lastMouseButton = -1;
             }
 
-            // Regular keys normally
-            if( m_terminateTimer <= 0.0f && m_rebootTimer <= 0.0f && m_shutdownTimer <= 0.0f )
+            lastMouseX = charX;
+            lastMouseY = charY;
+        }
+
+        return false;
+    }
+
+    @Override
+    public boolean mouseDragged( double mouseX, double mouseY, int button, double v2, double v3 )
+    {
+        ClientComputer computer = this.computer.get();
+        if( computer == null || !computer.isColour() || button < 0 || button > 2 ) return false;
+
+        Terminal term = computer.getTerminal();
+        if( term != null )
+        {
+            int charX = (int) (mouseX / FixedWidthFontRenderer.FONT_WIDTH);
+            int charY = (int) (mouseY / FixedWidthFontRenderer.FONT_HEIGHT);
+            charX = Math.min( Math.max( charX, 0 ), term.getWidth() - 1 );
+            charY = Math.min( Math.max( charY, 0 ), term.getHeight() - 1 );
+
+            if( button == lastMouseButton && (charX != lastMouseX || charY != lastMouseY) )
             {
-                boolean repeat = Keyboard.isRepeatEvent();
-                boolean handled = false;
-                if( key > 0 )
-                {
-                    if( !repeat )
-                    {
-                        m_keysDown.add( key );
-                    }
-
-                    // Queue the "key" event
-                    IComputer computer = m_computer.getComputer();
-                    if( computer != null ) computer.keyDown( key, repeat );
-                    handled = true;
-                }
-
-                if( (ch >= 32 && ch <= 126) || (ch >= 160 && ch <= 255) ) // printable chars in byte range
-                {
-                    // Queue the "char" event
-                    queueEvent( "char", new Object[] { Character.toString( ch ) } );
-                    handled = true;
-                }
-
-                return handled;
+                computer.mouseDrag( button + 1, charX + 1, charY + 1 );
+                lastMouseX = charX;
+                lastMouseY = charY;
             }
         }
 
@@ -148,232 +253,120 @@ public class WidgetTerminal extends Widget
     }
 
     @Override
-    public void mouseClicked( int mouseX, int mouseY, int button )
+    public boolean mouseScrolled( double mouseX, double mouseY, double delta )
     {
-        if( mouseX >= getXPosition() && mouseX < getXPosition() + getWidth() &&
-            mouseY >= getYPosition() && mouseY < getYPosition() + getHeight() )
+        ClientComputer computer = this.computer.get();
+        if( computer == null || !computer.isColour() || delta == 0 ) return false;
+
+        Terminal term = computer.getTerminal();
+        if( term != null )
         {
-            if( !m_focus && button == 0 )
-            {
-                m_focus = true;
-            }
+            int charX = (int) (mouseX / FixedWidthFontRenderer.FONT_WIDTH);
+            int charY = (int) (mouseY / FixedWidthFontRenderer.FONT_HEIGHT);
+            charX = Math.min( Math.max( charX, 0 ), term.getWidth() - 1 );
+            charY = Math.min( Math.max( charY, 0 ), term.getHeight() - 1 );
 
-            if( m_focus )
-            {
-                IComputer computer = m_computer.getComputer();
-                if( computer != null && computer.isColour() && button >= 0 && button <= 2 )
-                {
-                    Terminal term = computer.getTerminal();
-                    if( term != null )
-                    {
-                        int charX = (mouseX - (getXPosition() + m_leftMargin)) / FixedWidthFontRenderer.FONT_WIDTH;
-                        int charY = (mouseY - (getYPosition() + m_topMargin)) / FixedWidthFontRenderer.FONT_HEIGHT;
-                        charX = Math.min( Math.max( charX, 0 ), term.getWidth() - 1 );
-                        charY = Math.min( Math.max( charY, 0 ), term.getHeight() - 1 );
+            computer.mouseScroll( delta < 0 ? 1 : -1, charX + 1, charY + 1 );
 
-                        computer.mouseClick( button + 1, charX + 1, charY + 1 );
-
-                        m_lastClickButton = button;
-                        m_lastClickX = charX;
-                        m_lastClickY = charY;
-                    }
-                }
-            }
-        }
-        else
-        {
-            if( m_focus && button == 0 && m_allowFocusLoss )
-            {
-                m_focus = false;
-            }
+            lastMouseX = charX;
+            lastMouseY = charY;
         }
+
+        return true;
     }
 
-    @Override
-    public boolean onKeyboardInput()
-    {
-        boolean handled = false;
-        for( int i = m_keysDown.size() - 1; i >= 0; --i )
-        {
-            int key = m_keysDown.get( i );
-            if( !Keyboard.isKeyDown( key ) )
-            {
-                m_keysDown.remove( i );
-                if( m_focus )
-                {
-                    // Queue the "key_up" event
-                    IComputer computer = m_computer.getComputer();
-                    if( computer != null ) computer.keyUp( key );
-                    handled = true;
-                }
-            }
-        }
-
-        return handled;
-    }
-
-    @Override
-    public void handleMouseInput( int mouseX, int mouseY )
-    {
-        IComputer computer = m_computer.getComputer();
-        if( mouseX >= getXPosition() && mouseX < getXPosition() + getWidth() &&
-            mouseY >= getYPosition() && mouseY < getYPosition() + getHeight() &&
-            computer != null && computer.isColour() )
-        {
-            Terminal term = computer.getTerminal();
-            if( term != null )
-            {
-                int charX = (mouseX - (getXPosition() + m_leftMargin)) / FixedWidthFontRenderer.FONT_WIDTH;
-                int charY = (mouseY - (getYPosition() + m_topMargin)) / FixedWidthFontRenderer.FONT_HEIGHT;
-                charX = Math.min( Math.max( charX, 0 ), term.getWidth() - 1 );
-                charY = Math.min( Math.max( charY, 0 ), term.getHeight() - 1 );
-
-                if( m_lastClickButton >= 0 && !Mouse.isButtonDown( m_lastClickButton ) )
-                {
-                    if( m_focus ) computer.mouseUp( m_lastClickButton + 1, charX + 1, charY + 1 );
-                    m_lastClickButton = -1;
-                }
-
-                int wheelChange = Mouse.getEventDWheel();
-                if( wheelChange == 0 && m_lastClickButton == -1 )
-                {
-                    return;
-                }
-
-                if( m_focus )
-                {
-                    if( wheelChange < 0 )
-                    {
-                        computer.mouseScroll( 1, charX + 1, charY + 1 );
-                    }
-                    else if( wheelChange > 0 )
-                    {
-                        computer.mouseScroll( -1, charX + 1, charY + 1 );
-                    }
-
-                    if( m_lastClickButton >= 0 && (charX != m_lastClickX || charY != m_lastClickY) )
-                    {
-                        computer.mouseDrag( m_lastClickButton + 1, charX + 1, charY + 1 );
-                        m_lastClickX = charX;
-                        m_lastClickY = charY;
-                    }
-                }
-            }
-        }
-    }
-
-    @Override
     public void update()
     {
-        // Handle special keys
-        if( m_focus && (Keyboard.isKeyDown( 29 ) || Keyboard.isKeyDown( 157 )) )
+        if( terminateTimer >= 0 && terminateTimer < TERMINATE_TIME && (terminateTimer += 0.05f) > TERMINATE_TIME )
         {
-            // Ctrl+T for terminate
-            if( Keyboard.isKeyDown( 20 ) )
-            {
-                if( m_terminateTimer < TERMINATE_TIME )
-                {
-                    m_terminateTimer += 0.05f;
-                    if( m_terminateTimer >= TERMINATE_TIME ) queueEvent( "terminate" );
-                }
-            }
-            else
-            {
-                m_terminateTimer = 0.0f;
-            }
-
-            // Ctrl+R for reboot
-            if( Keyboard.isKeyDown( 19 ) )
-            {
-                if( m_rebootTimer < TERMINATE_TIME )
-                {
-                    m_rebootTimer += 0.05f;
-                    if( m_rebootTimer >= TERMINATE_TIME )
-                    {
-                        IComputer computer = m_computer.getComputer();
-                        if( computer != null ) computer.reboot();
-                    }
-                }
-            }
-            else
-            {
-                m_rebootTimer = 0.0f;
-            }
-
-            // Ctrl+S for shutdown
-            if( Keyboard.isKeyDown( 31 ) )
-            {
-                if( m_shutdownTimer < TERMINATE_TIME )
-                {
-                    m_shutdownTimer += 0.05f;
-                    if( m_shutdownTimer >= TERMINATE_TIME )
-                    {
-                        IComputer computer = m_computer.getComputer();
-                        if( computer != null ) computer.shutdown();
-                    }
-                }
-            }
-            else
-            {
-                m_shutdownTimer = 0.0f;
-            }
+            queueEvent( "terminate" );
         }
-        else
+
+        if( shutdownTimer >= 0 && shutdownTimer < TERMINATE_TIME && (shutdownTimer += 0.05f) > TERMINATE_TIME )
         {
-            m_terminateTimer = 0.0f;
-            m_rebootTimer = 0.0f;
-            m_shutdownTimer = 0.0f;
+            ClientComputer computer = this.computer.get();
+            if( computer != null ) computer.shutdown();
+        }
+
+        if( rebootTimer >= 0 && rebootTimer < TERMINATE_TIME && (rebootTimer += 0.05f) > TERMINATE_TIME )
+        {
+            ClientComputer computer = this.computer.get();
+            if( computer != null ) computer.reboot();
         }
     }
 
     @Override
-    public void draw( Minecraft mc, int xOrigin, int yOrigin, int mouseX, int mouseY )
+    public boolean changeFocus( boolean reversed )
     {
-        int startX = xOrigin + getXPosition();
-        int startY = yOrigin + getYPosition();
+        if( focused )
+        {
+            // When blurring, we should make all keys go up
+            for( int key = 0; key < keysDown.size(); key++ )
+            {
+                if( keysDown.get( key ) ) queueEvent( "key_up", key );
+            }
+            keysDown.clear();
 
-        synchronized( m_computer )
+            // When blurring, we should make the last mouse button go up
+            if( lastMouseButton > 0 )
+            {
+                IComputer computer = this.computer.get();
+                if( computer != null ) computer.mouseUp( lastMouseButton + 1, lastMouseX + 1, lastMouseY + 1 );
+                lastMouseButton = -1;
+            }
+
+            shutdownTimer = terminateTimer = rebootTimer = -1;
+        }
+        focused = !focused;
+        return true;
+    }
+
+    public void draw( int originX, int originY )
+    {
+        synchronized( computer )
         {
             // Draw the screen contents
-            IComputer computer = m_computer.getComputer();
+            ClientComputer computer = this.computer.get();
             Terminal terminal = computer != null ? computer.getTerminal() : null;
             if( terminal != null )
             {
                 // Draw the terminal
                 boolean greyscale = !computer.isColour();
-
                 Palette palette = terminal.getPalette();
 
                 // Get the data from the terminal first
                 // Unfortunately we have to keep the lock for the whole of drawing, so the text doesn't change under us.
                 FixedWidthFontRenderer fontRenderer = FixedWidthFontRenderer.instance();
-                boolean tblink = m_focus && terminal.getCursorBlink() && FrameInfo.getGlobalCursorBlink();
+                boolean tblink = terminal.getCursorBlink() && FrameInfo.getGlobalCursorBlink();
                 int tw = terminal.getWidth();
                 int th = terminal.getHeight();
                 int tx = terminal.getCursorX();
                 int ty = terminal.getCursorY();
 
-                int x = startX + m_leftMargin;
-                int y = startY + m_topMargin;
-
                 // Draw margins
                 TextBuffer emptyLine = new TextBuffer( ' ', tw );
-                if( m_topMargin > 0 )
+                if( topMargin > 0 )
                 {
-                    fontRenderer.drawString( emptyLine, x, startY, terminal.getTextColourLine( 0 ), terminal.getBackgroundColourLine( 0 ), m_leftMargin, m_rightMargin, greyscale, palette );
+                    fontRenderer.drawString( emptyLine, originX, originY - topMargin,
+                        terminal.getTextColourLine( 0 ), terminal.getBackgroundColourLine( 0 ),
+                        leftMargin, rightMargin, greyscale, palette );
                 }
-                if( m_bottomMargin > 0 )
+
+                if( bottomMargin > 0 )
                 {
-                    fontRenderer.drawString( emptyLine, x, startY + 2 * m_bottomMargin + (th - 1) * FixedWidthFontRenderer.FONT_HEIGHT, terminal.getTextColourLine( th - 1 ), terminal.getBackgroundColourLine( th - 1 ), m_leftMargin, m_rightMargin, greyscale, palette );
+                    fontRenderer.drawString( emptyLine, originX, originY + bottomMargin + (th - 1) * FixedWidthFontRenderer.FONT_HEIGHT,
+                        terminal.getTextColourLine( th - 1 ), terminal.getBackgroundColourLine( th - 1 ),
+                        leftMargin, rightMargin, greyscale, palette );
                 }
 
                 // Draw lines
+                int y = originY;
                 for( int line = 0; line < th; line++ )
                 {
                     TextBuffer text = terminal.getLine( line );
                     TextBuffer colour = terminal.getTextColourLine( line );
                     TextBuffer backgroundColour = terminal.getBackgroundColourLine( line );
-                    fontRenderer.drawString( text, x, y, colour, backgroundColour, m_leftMargin, m_rightMargin, greyscale, palette );
+                    fontRenderer.drawString( text, originX, y, colour, backgroundColour, leftMargin, rightMargin, greyscale, palette );
                     y += FixedWidthFontRenderer.FONT_HEIGHT;
                 }
 
@@ -384,8 +377,8 @@ public class WidgetTerminal extends Widget
 
                     fontRenderer.drawString(
                         cursor,
-                        x + FixedWidthFontRenderer.FONT_WIDTH * tx,
-                        startY + m_topMargin + FixedWidthFontRenderer.FONT_HEIGHT * ty,
+                        originX + FixedWidthFontRenderer.FONT_WIDTH * tx,
+                        originY + FixedWidthFontRenderer.FONT_HEIGHT * ty,
                         cursorColour, null,
                         0, 0,
                         greyscale,
@@ -396,16 +389,29 @@ public class WidgetTerminal extends Widget
             else
             {
                 // Draw a black background
-                mc.getTextureManager().bindTexture( BACKGROUND );
                 Colour black = Colour.Black;
-                GlStateManager.color( black.getR(), black.getG(), black.getB(), 1.0f );
+                GlStateManager.color4f( black.getR(), black.getG(), black.getB(), 1.0f );
                 try
                 {
-                    drawTexturedModalRect( startX, startY, 0, 0, getWidth(), getHeight() );
+                    int x = originX - leftMargin;
+                    int y = originY - rightMargin;
+                    int width = termWidth * FixedWidthFontRenderer.FONT_WIDTH + leftMargin + rightMargin;
+                    int height = termHeight * FixedWidthFontRenderer.FONT_HEIGHT + topMargin + bottomMargin;
+
+                    client.getTextureManager().bindTexture( BACKGROUND );
+
+                    Tessellator tesslector = Tessellator.getInstance();
+                    BufferBuilder buffer = tesslector.getBuffer();
+                    buffer.begin( GL11.GL_QUADS, DefaultVertexFormats.POSITION_TEX );
+                    buffer.pos( x, y + height, 0 ).tex( 0 / 256.0, height / 256.0 ).endVertex();
+                    buffer.pos( x + width, y + height, 0 ).tex( width / 256.0, height / 256.0 ).endVertex();
+                    buffer.pos( x + width, y, 0 ).tex( width / 256.0, 0 / 256.0 ).endVertex();
+                    buffer.pos( x, y, 0 ).tex( 0 / 256.0, 0 / 256.0 ).endVertex();
+                    tesslector.draw();
                 }
                 finally
                 {
-                    GlStateManager.color( 1.0f, 1.0f, 1.0f, 1.0f );
+                    GlStateManager.color4f( 1.0f, 1.0f, 1.0f, 1.0f );
                 }
             }
         }
@@ -413,13 +419,19 @@ public class WidgetTerminal extends Widget
 
     private void queueEvent( String event )
     {
-        IComputer computer = m_computer.getComputer();
+        ClientComputer computer = this.computer.get();
         if( computer != null ) computer.queueEvent( event );
     }
 
-    private void queueEvent( String event, Object[] args )
+    private void queueEvent( String event, Object... args )
     {
-        IComputer computer = m_computer.getComputer();
+        ClientComputer computer = this.computer.get();
         if( computer != null ) computer.queueEvent( event, args );
     }
+
+    @Override
+    public boolean isMouseOver( double x, double y )
+    {
+        return true;
+    }
 }

src/main/java/dan200/computercraft/client/gui/widgets/WidgetWrapper.java

@@ -0,0 +1,105 @@
+/*
+ * This file is part of ComputerCraft - http://www.computercraft.info
+ * Copyright Daniel Ratcliffe, 2011-2019. Do not distribute without permission.
+ * Send enquiries to dratcliffe@gmail.com
+ */
+
+package dan200.computercraft.client.gui.widgets;
+
+import net.minecraft.client.gui.IGuiEventListener;
+
+public class WidgetWrapper implements IGuiEventListener
+{
+    private final IGuiEventListener listener;
+    private final int x;
+    private final int y;
+    private final int width;
+    private final int height;
+
+    public WidgetWrapper( IGuiEventListener listener, int x, int y, int width, int height )
+    {
+        this.listener = listener;
+        this.x = x;
+        this.y = y;
+        this.width = width;
+        this.height = height;
+    }
+
+    @Override
+    public boolean changeFocus( boolean b )
+    {
+        return listener.changeFocus( b );
+    }
+
+    @Override
+    public boolean mouseClicked( double x, double y, int button )
+    {
+        double dx = x - this.x, dy = y - this.y;
+        return dx >= 0 && dx < width && dy >= 0 && dy < height && listener.mouseClicked( dx, dy, button );
+    }
+
+    @Override
+    public boolean mouseReleased( double x, double y, int button )
+    {
+        double dx = x - this.x, dy = y - this.y;
+        return dx >= 0 && dx < width && dy >= 0 && dy < height && listener.mouseReleased( dx, dy, button );
+    }
+
+    @Override
+    public boolean mouseDragged( double x, double y, int button, double deltaX, double deltaY )
+    {
+        double dx = x - this.x, dy = y - this.y;
+        return dx >= 0 && dx < width && dy >= 0 && dy < height && listener.mouseDragged( dx, dy, button, deltaX, deltaY );
+    }
+
+    @Override
+    public boolean mouseScrolled( double x, double y, double delta )
+    {
+        return listener.mouseScrolled( x, y, delta );
+    }
+
+    @Override
+    public boolean keyPressed( int key, int scancode, int modifiers )
+    {
+        return listener.keyPressed( key, scancode, modifiers );
+    }
+
+    @Override
+    public boolean keyReleased( int key, int scancode, int modifiers )
+    {
+        return listener.keyReleased( key, scancode, modifiers );
+    }
+
+    @Override
+    public boolean charTyped( char character, int modifiers )
+    {
+        return listener.charTyped( character, modifiers );
+    }
+
+    public int getX()
+    {
+        return x;
+    }
+
+    public int getY()
+    {
+        return y;
+    }
+
+    public int getWidth()
+    {
+        return width;
+    }
+
+    public int getHeight()
+    {
+        return height;
+    }
+
+    @Override
+    public boolean isMouseOver( double x, double y )
+    {
+        double dx = x - this.x, dy = y - this.y;
+        return dx >= 0 && dx < width && dy >= 0 && dy < height;
+    }
+}

src/main/java/dan200/computercraft/client/proxy/ComputerCraftProxyClient.java

@@ -1,61 +1,74 @@
 /*
  * This file is part of ComputerCraft - http://www.computercraft.info
- * Copyright Daniel Ratcliffe, 2011-2020. Do not distribute without permission.
+ * Copyright Daniel Ratcliffe, 2011-2019. Do not distribute without permission.
  * Send enquiries to dratcliffe@gmail.com
  */
+
 package dan200.computercraft.client.proxy;
 
 import dan200.computercraft.ComputerCraft;
+import dan200.computercraft.client.gui.*;
 import dan200.computercraft.client.render.TileEntityCableRenderer;
 import dan200.computercraft.client.render.TileEntityMonitorRenderer;
 import dan200.computercraft.client.render.TileEntityTurtleRenderer;
-import dan200.computercraft.shared.command.CommandCopy;
+import dan200.computercraft.shared.common.ContainerHeldItem;
+import dan200.computercraft.shared.computer.inventory.ContainerComputer;
+import dan200.computercraft.shared.computer.inventory.ContainerViewComputer;
+import dan200.computercraft.shared.peripheral.diskdrive.ContainerDiskDrive;
 import dan200.computercraft.shared.peripheral.modem.wired.TileCable;
 import dan200.computercraft.shared.peripheral.monitor.ClientMonitor;
 import dan200.computercraft.shared.peripheral.monitor.TileMonitor;
-import dan200.computercraft.shared.proxy.ComputerCraftProxyCommon;
+import dan200.computercraft.shared.peripheral.printer.ContainerPrinter;
+import dan200.computercraft.shared.pocket.inventory.ContainerPocketComputer;
 import dan200.computercraft.shared.turtle.blocks.TileTurtle;
-import net.minecraftforge.client.ClientCommandHandler;
+import dan200.computercraft.shared.turtle.inventory.ContainerTurtle;
+import net.minecraft.client.gui.ScreenManager;
+import net.minecraftforge.api.distmarker.Dist;
 import net.minecraftforge.event.world.WorldEvent;
+import net.minecraftforge.eventbus.api.SubscribeEvent;
 import net.minecraftforge.fml.client.registry.ClientRegistry;
 import net.minecraftforge.fml.common.Mod;
-import net.minecraftforge.fml.common.eventhandler.SubscribeEvent;
-import net.minecraftforge.fml.relauncher.Side;
+import net.minecraftforge.fml.event.lifecycle.FMLClientSetupEvent;
 
-public class ComputerCraftProxyClient extends ComputerCraftProxyCommon
+@Mod.EventBusSubscriber( modid = ComputerCraft.MOD_ID, value = Dist.CLIENT, bus = Mod.EventBusSubscriber.Bus.MOD )
+public final class ComputerCraftProxyClient
 {
-    @Override
-    public void preInit()
+    @SubscribeEvent
+    public static void setupClient( FMLClientSetupEvent event )
     {
-        super.preInit();
+        registerContainers();
 
-        // Register any client-specific commands
-        ClientCommandHandler.instance.registerCommand( CommandCopy.INSTANCE );
-    }
-
-    @Override
-    public void init()
-    {
-        super.init();
-
-        // Setup renderers
+        // Setup TESRs
         ClientRegistry.bindTileEntitySpecialRenderer( TileMonitor.class, new TileEntityMonitorRenderer() );
         ClientRegistry.bindTileEntitySpecialRenderer( TileCable.class, new TileEntityCableRenderer() );
         ClientRegistry.bindTileEntitySpecialRenderer( TileTurtle.class, new TileEntityTurtleRenderer() );
     }
 
-    @Mod.EventBusSubscriber( modid = ComputerCraft.MOD_ID, value = Side.CLIENT )
+    private static void registerContainers()
+    {
+        // My IDE doesn't think so, but we do actually need these generics.
+
+        ScreenManager.<ContainerComputer, GuiComputer<ContainerComputer>>registerFactory( ContainerComputer.TYPE, GuiComputer::create );
+        ScreenManager.<ContainerPocketComputer, GuiComputer<ContainerPocketComputer>>registerFactory( ContainerPocketComputer.TYPE, GuiComputer::createPocket );
+        ScreenManager.registerFactory( ContainerTurtle.TYPE, GuiTurtle::new );
+
+        ScreenManager.registerFactory( ContainerPrinter.TYPE, GuiPrinter::new );
+        ScreenManager.registerFactory( ContainerDiskDrive.TYPE, GuiDiskDrive::new );
+        ScreenManager.registerFactory( ContainerHeldItem.PRINTOUT_TYPE, GuiPrintout::new );
+
+        ScreenManager.<ContainerViewComputer, GuiComputer<ContainerViewComputer>>registerFactory( ContainerViewComputer.TYPE, GuiComputer::createView );
+    }
+
+    @Mod.EventBusSubscriber( modid = ComputerCraft.MOD_ID, value = Dist.CLIENT )
     public static final class ForgeHandlers
     {
         @SubscribeEvent
         public static void onWorldUnload( WorldEvent.Unload event )
         {
-            if( event.getWorld().isRemote )
+            if( event.getWorld().isRemote() )
             {
                 ClientMonitor.destroyAll();
             }
         }
     }
-
-
 }

src/main/java/dan200/computercraft/client/render/CableHighlightRenderer.java

@@ -1,221 +1,90 @@
 /*
  * This file is part of ComputerCraft - http://www.computercraft.info
- * Copyright Daniel Ratcliffe, 2011-2020. Do not distribute without permission.
+ * Copyright Daniel Ratcliffe, 2011-2019. Do not distribute without permission.
  * Send enquiries to dratcliffe@gmail.com
  */
+
 package dan200.computercraft.client.render;
 
+import com.mojang.blaze3d.platform.GlStateManager;
 import dan200.computercraft.ComputerCraft;
-import dan200.computercraft.shared.peripheral.PeripheralType;
 import dan200.computercraft.shared.peripheral.modem.wired.BlockCable;
-import dan200.computercraft.shared.peripheral.modem.wired.CableBounds;
+import dan200.computercraft.shared.peripheral.modem.wired.CableShapes;
 import dan200.computercraft.shared.util.WorldUtil;
-import net.minecraft.block.state.IBlockState;
-import net.minecraft.client.renderer.BufferBuilder;
-import net.minecraft.client.renderer.GlStateManager;
-import net.minecraft.client.renderer.RenderGlobal;
-import net.minecraft.client.renderer.Tessellator;
-import net.minecraft.client.renderer.vertex.DefaultVertexFormats;
-import net.minecraft.entity.player.EntityPlayer;
-import net.minecraft.util.EnumFacing;
+import net.minecraft.block.BlockState;
+import net.minecraft.client.Minecraft;
+import net.minecraft.client.renderer.ActiveRenderInfo;
+import net.minecraft.client.renderer.WorldRenderer;
 import net.minecraft.util.math.BlockPos;
+import net.minecraft.util.math.BlockRayTraceResult;
 import net.minecraft.util.math.RayTraceResult;
+import net.minecraft.util.math.Vec3d;
+import net.minecraft.util.math.shapes.VoxelShape;
 import net.minecraft.world.World;
+import net.minecraftforge.api.distmarker.Dist;
 import net.minecraftforge.client.event.DrawBlockHighlightEvent;
+import net.minecraftforge.eventbus.api.SubscribeEvent;
 import net.minecraftforge.fml.common.Mod;
-import net.minecraftforge.fml.common.eventhandler.SubscribeEvent;
-import net.minecraftforge.fml.relauncher.Side;
 import org.lwjgl.opengl.GL11;
 
-@Mod.EventBusSubscriber( modid = ComputerCraft.MOD_ID, value = Side.CLIENT )
+@Mod.EventBusSubscriber( modid = ComputerCraft.MOD_ID, value = Dist.CLIENT )
 public final class CableHighlightRenderer
 {
-    private static final float EXPAND = 0.002f;
-    private static final double MIN = CableBounds.MIN - EXPAND;
-    private static final double MAX = CableBounds.MAX + EXPAND;
-
     private CableHighlightRenderer()
     {
     }
 
+    /**
+     * Draw an outline for a specific part of a cable "Multipart".
+     *
+     * @param event The event to observe
+     * @see WorldRenderer#drawSelectionBox(ActiveRenderInfo, RayTraceResult, int)
+     */
     @SubscribeEvent
     public static void drawHighlight( DrawBlockHighlightEvent event )
     {
-        if( event.getTarget().typeOfHit != RayTraceResult.Type.BLOCK ) return;
+        if( event.getTarget().getType() != RayTraceResult.Type.BLOCK ) return;
 
-        BlockPos pos = event.getTarget().getBlockPos();
-        World world = event.getPlayer().getEntityWorld();
+        BlockRayTraceResult hit = (BlockRayTraceResult) event.getTarget();
+        BlockPos pos = hit.getPos();
+        World world = event.getInfo().getRenderViewEntity().getEntityWorld();
+        ActiveRenderInfo info = event.getInfo();
 
-        IBlockState state = world.getBlockState( pos );
-        if( state.getBlock() != ComputerCraft.Blocks.cable ) return;
+        BlockState state = world.getBlockState( pos );
 
-        state = state.getActualState( world, pos );
+        // We only care about instances with both cable and modem.
+        if( state.getBlock() != ComputerCraft.Blocks.cable || state.get( BlockCable.MODEM ).getFacing() == null || !state.get( BlockCable.CABLE ) )
+        {
+            return;
+        }
 
         event.setCanceled( true );
-        PeripheralType type = BlockCable.getPeripheralType( state );
+
+        Minecraft mc = Minecraft.getInstance();
 
         GlStateManager.enableBlend();
-        GlStateManager.tryBlendFuncSeparate( GL11.GL_SRC_ALPHA, GL11.GL_ONE_MINUS_SRC_ALPHA, 1, 0 );
-        GlStateManager.color( 0.0f, 0.0f, 0.0f, 0.4f );
-        GL11.glLineWidth( 2.0F );
-        GlStateManager.disableTexture2D();
+        GlStateManager.blendFuncSeparate( GlStateManager.SourceFactor.SRC_ALPHA, GlStateManager.DestFactor.ONE_MINUS_SRC_ALPHA, GlStateManager.SourceFactor.ONE, GlStateManager.DestFactor.ZERO );
+        GlStateManager.lineWidth( Math.max( 2.5F, mc.mainWindow.getFramebufferWidth() / 1920.0F * 2.5F ) );
+        GlStateManager.disableTexture();
         GlStateManager.depthMask( false );
+        GlStateManager.matrixMode( GL11.GL_PROJECTION );
         GlStateManager.pushMatrix();
+        GlStateManager.scalef( 1.0F, 1.0F, 0.999F );
 
-        {
-            EntityPlayer player = event.getPlayer();
-            double x = player.lastTickPosX + (player.posX - player.lastTickPosX) * event.getPartialTicks();
-            double y = player.lastTickPosY + (player.posY - player.lastTickPosY) * event.getPartialTicks();
-            double z = player.lastTickPosZ + (player.posZ - player.lastTickPosZ) * event.getPartialTicks();
+        VoxelShape shape = WorldUtil.isVecInside( CableShapes.getModemShape( state ), hit.getHitVec().subtract( pos.getX(), pos.getY(), pos.getZ() ) )
+            ? CableShapes.getModemShape( state )
+            : CableShapes.getCableShape( state );
 
-            GlStateManager.translate( -x + pos.getX(), -y + pos.getY(), -z + pos.getZ() );
-        }
-
-        if( type != PeripheralType.Cable && WorldUtil.isVecInsideInclusive( CableBounds.getModemBounds( state ), event.getTarget().hitVec.subtract( pos.getX(), pos.getY(), pos.getZ() ) ) )
-        {
-            RenderGlobal.drawSelectionBoundingBox( CableBounds.getModemBounds( state ), 0, 0, 0, 0.4f );
-        }
-        else
-        {
-            int flags = 0;
-
-            Tessellator tessellator = Tessellator.getInstance();
-            BufferBuilder buffer = tessellator.getBuffer();
-
-            for( EnumFacing facing : EnumFacing.VALUES )
-            {
-                if( BlockCable.doesConnectVisually( state, world, pos, facing ) )
-                {
-                    flags |= 1 << facing.ordinal();
-
-
-                    switch( facing.getAxis() )
-                    {
-                        case X:
-                        {
-                            double offset = facing == EnumFacing.WEST ? -EXPAND : 1 + EXPAND;
-                            double centre = facing == EnumFacing.WEST ? MIN : MAX;
-
-                            buffer.begin( GL11.GL_LINE_STRIP, DefaultVertexFormats.POSITION );
-                            buffer.pos( offset, MIN, MIN ).endVertex();
-                            buffer.pos( offset, MAX, MIN ).endVertex();
-                            buffer.pos( offset, MAX, MAX ).endVertex();
-                            buffer.pos( offset, MIN, MAX ).endVertex();
-                            buffer.pos( offset, MIN, MIN ).endVertex();
-                            tessellator.draw();
-
-                            buffer.begin( GL11.GL_LINES, DefaultVertexFormats.POSITION );
-                            buffer.pos( offset, MIN, MIN ).endVertex();
-                            buffer.pos( centre, MIN, MIN ).endVertex();
-                            buffer.pos( offset, MAX, MIN ).endVertex();
-                            buffer.pos( centre, MAX, MIN ).endVertex();
-                            buffer.pos( offset, MAX, MAX ).endVertex();
-                            buffer.pos( centre, MAX, MAX ).endVertex();
-                            buffer.pos( offset, MIN, MAX ).endVertex();
-                            buffer.pos( centre, MIN, MAX ).endVertex();
-                            tessellator.draw();
-                            break;
-                        }
-                        case Y:
-                        {
-                            double offset = facing == EnumFacing.DOWN ? -EXPAND : 1 + EXPAND;
-                            double centre = facing == EnumFacing.DOWN ? MIN : MAX;
-
-                            buffer.begin( GL11.GL_LINE_STRIP, DefaultVertexFormats.POSITION );
-                            buffer.pos( MIN, offset, MIN ).endVertex();
-                            buffer.pos( MAX, offset, MIN ).endVertex();
-                            buffer.pos( MAX, offset, MAX ).endVertex();
-                            buffer.pos( MIN, offset, MAX ).endVertex();
-                            buffer.pos( MIN, offset, MIN ).endVertex();
-                            tessellator.draw();
-
-                            buffer.begin( GL11.GL_LINES, DefaultVertexFormats.POSITION );
-                            buffer.pos( MIN, offset, MIN ).endVertex();
-                            buffer.pos( MIN, centre, MIN ).endVertex();
-                            buffer.pos( MAX, offset, MIN ).endVertex();
-                            buffer.pos( MAX, centre, MIN ).endVertex();
-                            buffer.pos( MAX, offset, MAX ).endVertex();
-                            buffer.pos( MAX, centre, MAX ).endVertex();
-                            buffer.pos( MIN, offset, MAX ).endVertex();
-                            buffer.pos( MIN, centre, MAX ).endVertex();
-                            tessellator.draw();
-                            break;
-                        }
-                        case Z:
-                        {
-                            double offset = facing == EnumFacing.NORTH ? -EXPAND : 1 + EXPAND;
-                            double centre = facing == EnumFacing.NORTH ? MIN : MAX;
-
-                            buffer.begin( GL11.GL_LINE_STRIP, DefaultVertexFormats.POSITION );
-                            buffer.pos( MIN, MIN, offset ).endVertex();
-                            buffer.pos( MAX, MIN, offset ).endVertex();
-                            buffer.pos( MAX, MAX, offset ).endVertex();
-                            buffer.pos( MIN, MAX, offset ).endVertex();
-                            buffer.pos( MIN, MIN, offset ).endVertex();
-                            tessellator.draw();
-
-                            buffer.begin( GL11.GL_LINES, DefaultVertexFormats.POSITION );
-                            buffer.pos( MIN, MIN, offset ).endVertex();
-                            buffer.pos( MIN, MIN, centre ).endVertex();
-                            buffer.pos( MAX, MIN, offset ).endVertex();
-                            buffer.pos( MAX, MIN, centre ).endVertex();
-                            buffer.pos( MAX, MAX, offset ).endVertex();
-                            buffer.pos( MAX, MAX, centre ).endVertex();
-                            buffer.pos( MIN, MAX, offset ).endVertex();
-                            buffer.pos( MIN, MAX, centre ).endVertex();
-                            tessellator.draw();
-                            break;
-                        }
-                    }
-                }
-            }
-
-            buffer.begin( GL11.GL_LINES, DefaultVertexFormats.POSITION );
-
-            draw( buffer, flags, EnumFacing.WEST, EnumFacing.DOWN, EnumFacing.Axis.Z );
-            draw( buffer, flags, EnumFacing.WEST, EnumFacing.UP, EnumFacing.Axis.Z );
-            draw( buffer, flags, EnumFacing.EAST, EnumFacing.DOWN, EnumFacing.Axis.Z );
-            draw( buffer, flags, EnumFacing.EAST, EnumFacing.UP, EnumFacing.Axis.Z );
-
-            draw( buffer, flags, EnumFacing.WEST, EnumFacing.NORTH, EnumFacing.Axis.Y );
-            draw( buffer, flags, EnumFacing.WEST, EnumFacing.SOUTH, EnumFacing.Axis.Y );
-            draw( buffer, flags, EnumFacing.EAST, EnumFacing.NORTH, EnumFacing.Axis.Y );
-            draw( buffer, flags, EnumFacing.EAST, EnumFacing.SOUTH, EnumFacing.Axis.Y );
-
-            draw( buffer, flags, EnumFacing.DOWN, EnumFacing.NORTH, EnumFacing.Axis.X );
-            draw( buffer, flags, EnumFacing.DOWN, EnumFacing.SOUTH, EnumFacing.Axis.X );
-            draw( buffer, flags, EnumFacing.UP, EnumFacing.NORTH, EnumFacing.Axis.X );
-            draw( buffer, flags, EnumFacing.UP, EnumFacing.SOUTH, EnumFacing.Axis.X );
-
-            tessellator.draw();
-        }
+        Vec3d cameraPos = info.getProjectedView();
+        WorldRenderer.drawShape(
+            shape, pos.getX() - cameraPos.getX(), pos.getY() - cameraPos.getY(), pos.getZ() - cameraPos.getZ(),
+            0.0F, 0.0F, 0.0F, 0.4F
+        );
 
         GlStateManager.popMatrix();
+        GlStateManager.matrixMode( GL11.GL_MODELVIEW );
         GlStateManager.depthMask( true );
-        GlStateManager.enableTexture2D();
+        GlStateManager.enableTexture();
         GlStateManager.disableBlend();
     }
-
-    private static void draw( BufferBuilder buffer, int flags, EnumFacing a, EnumFacing b, EnumFacing.Axis other )
-    {
-        if( ((flags >> a.ordinal()) & 1) != ((flags >> b.ordinal()) & 1) ) return;
-
-        double offA = a.getAxisDirection() == EnumFacing.AxisDirection.NEGATIVE ? MIN : MAX;
-        double offB = b.getAxisDirection() == EnumFacing.AxisDirection.NEGATIVE ? MIN : MAX;
-        switch( other )
-        {
-            case X:
-                buffer.pos( MIN, offA, offB ).endVertex();
-                buffer.pos( MAX, offA, offB ).endVertex();
-                break;
-            case Y:
-                buffer.pos( offA, MIN, offB ).endVertex();
-                buffer.pos( offA, MAX, offB ).endVertex();
-                break;
-            case Z:
-                buffer.pos( offA, offB, MIN ).endVertex();
-                buffer.pos( offA, offB, MAX ).endVertex();
-                break;
-        }
-    }
 }

src/main/java/dan200/computercraft/client/render/ItemMapLikeRenderer.java

@@ -1,17 +1,18 @@
 /*
  * This file is part of ComputerCraft - http://www.computercraft.info
- * Copyright Daniel Ratcliffe, 2011-2020. Do not distribute without permission.
+ * Copyright Daniel Ratcliffe, 2011-2019. Do not distribute without permission.
  * Send enquiries to dratcliffe@gmail.com
  */
+
 package dan200.computercraft.client.render;
 
+import com.mojang.blaze3d.platform.GlStateManager;
 import net.minecraft.client.Minecraft;
-import net.minecraft.client.renderer.GlStateManager;
-import net.minecraft.client.renderer.ItemRenderer;
-import net.minecraft.entity.player.EntityPlayer;
+import net.minecraft.client.renderer.FirstPersonRenderer;
+import net.minecraft.entity.player.PlayerEntity;
 import net.minecraft.item.ItemStack;
-import net.minecraft.util.EnumHand;
-import net.minecraft.util.EnumHandSide;
+import net.minecraft.util.Hand;
+import net.minecraft.util.HandSide;
 import net.minecraft.util.math.MathHelper;
 
 public abstract class ItemMapLikeRenderer
@@ -20,23 +21,23 @@ public abstract class ItemMapLikeRenderer
      * The main rendering method for the item.
      *
      * @param stack The stack to render
-     * @see ItemRenderer#renderMapFirstPerson(ItemStack)
+     * @see FirstPersonRenderer#renderMapFirstPerson(ItemStack)
      */
     protected abstract void renderItem( ItemStack stack );
 
-    protected void renderItemFirstPerson( EnumHand hand, float pitch, float equipProgress, float swingProgress, ItemStack stack )
+    protected void renderItemFirstPerson( Hand hand, float pitch, float equipProgress, float swingProgress, ItemStack stack )
     {
-        EntityPlayer player = Minecraft.getMinecraft().player;
+        PlayerEntity player = Minecraft.getInstance().player;
 
         GlStateManager.pushMatrix();
-        if( hand == EnumHand.MAIN_HAND && player.getHeldItemOffhand().isEmpty() )
+        if( hand == Hand.MAIN_HAND && player.getHeldItemOffhand().isEmpty() )
         {
             renderItemFirstPersonCenter( pitch, equipProgress, swingProgress, stack );
         }
         else
         {
             renderItemFirstPersonSide(
-                hand == EnumHand.MAIN_HAND ? player.getPrimaryHand() : player.getPrimaryHand().opposite(),
+                hand == Hand.MAIN_HAND ? player.getPrimaryHand() : player.getPrimaryHand().opposite(),
                 equipProgress, swingProgress, stack
             );
         }
@@ -50,35 +51,35 @@ public abstract class ItemMapLikeRenderer
      * @param equipProgress The equip progress of this item
      * @param swingProgress The swing progress of this item
      * @param stack         The stack to render
-     * @see ItemRenderer#renderMapFirstPersonSide(float, EnumHandSide, float, ItemStack)
+     * @see FirstPersonRenderer#renderMapFirstPersonSide(float, HandSide, float, ItemStack)
      */
-    private void renderItemFirstPersonSide( EnumHandSide side, float equipProgress, float swingProgress, ItemStack stack )
+    private void renderItemFirstPersonSide( HandSide side, float equipProgress, float swingProgress, ItemStack stack )
     {
-        Minecraft minecraft = Minecraft.getMinecraft();
-        float offset = side == EnumHandSide.RIGHT ? 1f : -1f;
-        GlStateManager.translate( offset * 0.125f, -0.125f, 0f );
+        Minecraft minecraft = Minecraft.getInstance();
+        float offset = side == HandSide.RIGHT ? 1f : -1f;
+        GlStateManager.translatef( offset * 0.125f, -0.125f, 0f );
 
         // If the player is not invisible then render a single arm
         if( !minecraft.player.isInvisible() )
         {
             GlStateManager.pushMatrix();
-            GlStateManager.rotate( offset * 10f, 0f, 0f, 1f );
-            minecraft.getItemRenderer().renderArmFirstPerson( equipProgress, swingProgress, side );
+            GlStateManager.rotatef( offset * 10f, 0f, 0f, 1f );
+            minecraft.getFirstPersonRenderer().renderArmFirstPerson( equipProgress, swingProgress, side );
             GlStateManager.popMatrix();
         }
 
         // Setup the appropriate transformations. This is just copied from the
         // corresponding method in ItemRenderer.
         GlStateManager.pushMatrix();
-        GlStateManager.translate( offset * 0.51f, -0.08f + equipProgress * -1.2f, -0.75f );
+        GlStateManager.translatef( offset * 0.51f, -0.08f + equipProgress * -1.2f, -0.75f );
         float f1 = MathHelper.sqrt( swingProgress );
         float f2 = MathHelper.sin( f1 * (float) Math.PI );
         float f3 = -0.5f * f2;
         float f4 = 0.4f * MathHelper.sin( f1 * ((float) Math.PI * 2f) );
         float f5 = -0.3f * MathHelper.sin( swingProgress * (float) Math.PI );
-        GlStateManager.translate( offset * f3, f4 - 0.3f * f2, f5 );
-        GlStateManager.rotate( f2 * -45f, 1f, 0f, 0f );
-        GlStateManager.rotate( offset * f2 * -30f, 0f, 1f, 0f );
+        GlStateManager.translatef( offset * f3, f4 - 0.3f * f2, f5 );
+        GlStateManager.rotatef( f2 * -45f, 1f, 0f, 0f );
+        GlStateManager.rotatef( offset * f2 * -30f, 0f, 1f, 0f );
 
         renderItem( stack );
 
@@ -92,25 +93,25 @@ public abstract class ItemMapLikeRenderer
      * @param equipProgress The equip progress of this item
      * @param swingProgress The swing progress of this item
      * @param stack         The stack to render
-     * @see ItemRenderer#renderMapFirstPerson(float, float, float)
+     * @see FirstPersonRenderer#renderMapFirstPerson(float, float, float)
      */
     private void renderItemFirstPersonCenter( float pitch, float equipProgress, float swingProgress, ItemStack stack )
     {
-        ItemRenderer itemRenderer = Minecraft.getMinecraft().getItemRenderer();
+        FirstPersonRenderer renderer = Minecraft.getInstance().getFirstPersonRenderer();
 
         // Setup the appropriate transformations. This is just copied from the
         // corresponding method in ItemRenderer.
         float swingRt = MathHelper.sqrt( swingProgress );
         float tX = -0.2f * MathHelper.sin( swingProgress * (float) Math.PI );
         float tZ = -0.4f * MathHelper.sin( swingRt * (float) Math.PI );
-        GlStateManager.translate( 0f, -tX / 2f, tZ );
-        float pitchAngle = itemRenderer.getMapAngleFromPitch( pitch );
-        GlStateManager.translate( 0f, 0.04f + equipProgress * -1.2f + pitchAngle * -0.5f, -0.72f );
-        GlStateManager.rotate( pitchAngle * -85f, 1f, 0f, 0f );
-        itemRenderer.renderArms();
+        GlStateManager.translatef( 0f, -tX / 2f, tZ );
+        float pitchAngle = renderer.getMapAngleFromPitch( pitch );
+        GlStateManager.translatef( 0f, 0.04f + equipProgress * -1.2f + pitchAngle * -0.5f, -0.72f );
+        GlStateManager.rotatef( pitchAngle * -85f, 1f, 0f, 0f );
+        renderer.renderArms();
         float rX = MathHelper.sin( swingRt * (float) Math.PI );
-        GlStateManager.rotate( rX * 20f, 1f, 0f, 0f );
-        GlStateManager.scale( 2f, 2f, 2f );
+        GlStateManager.rotatef( rX * 20f, 1f, 0f, 0f );
+        GlStateManager.scalef( 2f, 2f, 2f );
 
         renderItem( stack );
     }

src/main/java/dan200/computercraft/client/render/ItemPocketRenderer.java

@@ -1,10 +1,12 @@
 /*
  * This file is part of ComputerCraft - http://www.computercraft.info
- * Copyright Daniel Ratcliffe, 2011-2020. Do not distribute without permission.
+ * Copyright Daniel Ratcliffe, 2011-2019. Do not distribute without permission.
  * Send enquiries to dratcliffe@gmail.com
  */
+
 package dan200.computercraft.client.render;
 
+import com.mojang.blaze3d.platform.GlStateManager;
 import dan200.computercraft.ComputerCraft;
 import dan200.computercraft.client.FrameInfo;
 import dan200.computercraft.client.gui.FixedWidthFontRenderer;
@@ -17,14 +19,13 @@ import dan200.computercraft.shared.util.Colour;
 import dan200.computercraft.shared.util.Palette;
 import net.minecraft.client.Minecraft;
 import net.minecraft.client.renderer.BufferBuilder;
-import net.minecraft.client.renderer.GlStateManager;
 import net.minecraft.client.renderer.Tessellator;
 import net.minecraft.client.renderer.vertex.DefaultVertexFormats;
 import net.minecraft.item.ItemStack;
+import net.minecraftforge.api.distmarker.Dist;
 import net.minecraftforge.client.event.RenderSpecificHandEvent;
+import net.minecraftforge.eventbus.api.SubscribeEvent;
 import net.minecraftforge.fml.common.Mod;
-import net.minecraftforge.fml.common.eventhandler.SubscribeEvent;
-import net.minecraftforge.fml.relauncher.Side;
 import org.lwjgl.opengl.GL11;
 
 import static dan200.computercraft.client.gui.FixedWidthFontRenderer.*;
@@ -33,7 +34,7 @@ import static dan200.computercraft.client.gui.GuiComputer.*;
 /**
  * Emulates map rendering for pocket computers.
  */
-@Mod.EventBusSubscriber( modid = ComputerCraft.MOD_ID, value = Side.CLIENT )
+@Mod.EventBusSubscriber( modid = ComputerCraft.MOD_ID, value = Dist.CLIENT )
 public final class ItemPocketRenderer extends ItemMapLikeRenderer
 {
     private static final int MARGIN = 2;
@@ -82,19 +83,20 @@ public final class ItemPocketRenderer extends ItemMapLikeRenderer
         GlStateManager.pushMatrix();
 
         GlStateManager.disableLighting();
-        GlStateManager.disableDepth();
+        GlStateManager.disableDepthTest();
 
-        GlStateManager.rotate( 180f, 0f, 1f, 0f );
-        GlStateManager.rotate( 180f, 0f, 0f, 1f );
-        GlStateManager.scale( 0.5, 0.5, 0.5 );
+        GlStateManager.rotatef( 180f, 0f, 1f, 0f );
+        GlStateManager.rotatef( 180f, 0f, 0f, 1f );
+        GlStateManager.scalef( 0.5f, 0.5f, 0.5f );
 
         double scale = 0.75 / Math.max( width + FRAME * 2, height + FRAME * 2 + LIGHT_HEIGHT );
-        GlStateManager.scale( scale, scale, 0 );
-        GlStateManager.translate( -0.5 * width, -0.5 * height, 0 );
+        GlStateManager.scaled( scale, scale, 0 );
+        GlStateManager.translated( -0.5 * width, -0.5 * height, 0 );
 
         // Render the main frame
-        ComputerFamily family = ComputerCraft.Items.pocketComputer.getFamily( stack );
-        int frameColour = ComputerCraft.Items.pocketComputer.getColour( stack );
+        ItemPocketComputer item = (ItemPocketComputer) stack.getItem();
+        ComputerFamily family = item.getFamily();
+        int frameColour = item.getColour( stack );
         renderFrame( family, frameColour, width, height );
 
         // Render the light
@@ -110,7 +112,7 @@ public final class ItemPocketRenderer extends ItemMapLikeRenderer
         else
         {
             // Otherwise render a plain background
-            Minecraft.getMinecraft().getTextureManager().bindTexture( BACKGROUND );
+            Minecraft.getInstance().getTextureManager().bindTexture( BACKGROUND );
 
             Tessellator tessellator = Tessellator.getInstance();
             BufferBuilder buffer = tessellator.getBuffer();
@@ -121,7 +123,7 @@ public final class ItemPocketRenderer extends ItemMapLikeRenderer
             tessellator.draw();
         }
 
-        GlStateManager.enableDepth();
+        GlStateManager.enableDepthTest();
         GlStateManager.enableLighting();
         GlStateManager.popMatrix();
     }
@@ -129,7 +131,7 @@ public final class ItemPocketRenderer extends ItemMapLikeRenderer
     private static void renderFrame( ComputerFamily family, int colour, int width, int height )
     {
 
-        Minecraft.getMinecraft().getTextureManager().bindTexture( colour != -1
+        Minecraft.getInstance().getTextureManager().bindTexture( colour != -1
             ? BACKGROUND_COLOUR
             : family == ComputerFamily.Normal ? BACKGROUND_NORMAL : BACKGROUND_ADVANCED
         );
@@ -171,7 +173,7 @@ public final class ItemPocketRenderer extends ItemMapLikeRenderer
     private static void renderLight( int colour, int width, int height )
     {
         GlStateManager.enableBlend();
-        GlStateManager.disableTexture2D();
+        GlStateManager.disableTexture();
 
         float r = ((colour >>> 16) & 0xFF) / 255.0f;
         float g = ((colour >>> 8) & 0xFF) / 255.0f;
@@ -186,7 +188,7 @@ public final class ItemPocketRenderer extends ItemMapLikeRenderer
         buffer.pos( width - LIGHT_HEIGHT * 2, height + FRAME / 2.0f, 0.0D ).color( r, g, b, 1.0f ).endVertex();
 
         tessellator.draw();
-        GlStateManager.enableTexture2D();
+        GlStateManager.enableTexture();
     }
 
     private static void renderTerminal( Terminal terminal, boolean greyscale, int width, int height )

src/main/java/dan200/computercraft/client/render/ItemPrintoutRenderer.java

@@ -1,19 +1,20 @@
 /*
  * This file is part of ComputerCraft - http://www.computercraft.info
- * Copyright Daniel Ratcliffe, 2011-2020. Do not distribute without permission.
+ * Copyright Daniel Ratcliffe, 2011-2019. Do not distribute without permission.
  * Send enquiries to dratcliffe@gmail.com
  */
+
 package dan200.computercraft.client.render;
 
+import com.mojang.blaze3d.platform.GlStateManager;
 import dan200.computercraft.ComputerCraft;
 import dan200.computercraft.shared.media.items.ItemPrintout;
-import net.minecraft.client.renderer.GlStateManager;
 import net.minecraft.item.ItemStack;
+import net.minecraftforge.api.distmarker.Dist;
 import net.minecraftforge.client.event.RenderItemInFrameEvent;
 import net.minecraftforge.client.event.RenderSpecificHandEvent;
+import net.minecraftforge.eventbus.api.SubscribeEvent;
 import net.minecraftforge.fml.common.Mod;
-import net.minecraftforge.fml.common.eventhandler.SubscribeEvent;
-import net.minecraftforge.fml.relauncher.Side;
 
 import static dan200.computercraft.client.gui.FixedWidthFontRenderer.FONT_HEIGHT;
 import static dan200.computercraft.client.gui.FixedWidthFontRenderer.FONT_WIDTH;
@@ -24,7 +25,7 @@ import static dan200.computercraft.shared.media.items.ItemPrintout.LINE_MAX_LENG
 /**
  * Emulates map and item-frame rendering for printouts.
  */
-@Mod.EventBusSubscriber( modid = ComputerCraft.MOD_ID, value = Side.CLIENT )
+@Mod.EventBusSubscriber( modid = ComputerCraft.MOD_ID, value = Dist.CLIENT )
 public final class ItemPrintoutRenderer extends ItemMapLikeRenderer
 {
     private static final ItemPrintoutRenderer INSTANCE = new ItemPrintoutRenderer();
@@ -37,10 +38,9 @@ public final class ItemPrintoutRenderer extends ItemMapLikeRenderer
     public static void onRenderInHand( RenderSpecificHandEvent event )
     {
         ItemStack stack = event.getItemStack();
-        if( stack.getItem() != ComputerCraft.Items.printout ) return;
+        if( !(stack.getItem() instanceof ItemPrintout) ) return;
 
         event.setCanceled( true );
-
         INSTANCE.renderItemFirstPerson( event.getHand(), event.getInterpolatedPitch(), event.getEquipProgress(), event.getSwingProgress(), event.getItemStack() );
     }
 
@@ -48,13 +48,13 @@ public final class ItemPrintoutRenderer extends ItemMapLikeRenderer
     protected void renderItem( ItemStack stack )
     {
         // Setup various transformations. Note that these are partially adapated from the corresponding method
-        // in ItemRenderer.renderMapFirstPerson
+        // in FirstPersonRenderer.renderFirstPersonMap
         GlStateManager.disableLighting();
 
-        GlStateManager.rotate( 180f, 0f, 1f, 0f );
-        GlStateManager.rotate( 180f, 0f, 0f, 1f );
-        GlStateManager.scale( 0.42f, 0.42f, -0.42f );
-        GlStateManager.translate( -0.5f, -0.48f, 0.0f );
+        GlStateManager.rotatef( 180f, 0f, 1f, 0f );
+        GlStateManager.rotatef( 180f, 0f, 0f, 1f );
+        GlStateManager.scalef( 0.42f, 0.42f, -0.42f );
+        GlStateManager.translatef( -0.5f, -0.48f, 0.0f );
 
         drawPrintout( stack );
 
@@ -65,17 +65,17 @@ public final class ItemPrintoutRenderer extends ItemMapLikeRenderer
     public static void onRenderInFrame( RenderItemInFrameEvent event )
     {
         ItemStack stack = event.getItem();
-        if( stack.getItem() != ComputerCraft.Items.printout ) return;
+        if( !(stack.getItem() instanceof ItemPrintout) ) return;
 
         event.setCanceled( true );
 
         GlStateManager.disableLighting();
 
         // Move a little bit forward to ensure we're not clipping with the frame
-        GlStateManager.translate( 0.0f, 0.0f, -0.001f );
-        GlStateManager.rotate( 180f, 0f, 0f, 1f );
-        GlStateManager.scale( 0.95f, 0.95f, -0.95f );
-        GlStateManager.translate( -0.5f, -0.5f, 0.0f );
+        GlStateManager.translatef( 0.0f, 0.0f, -0.001f );
+        GlStateManager.rotatef( 180f, 0f, 0f, 1f );
+        GlStateManager.scalef( 0.95f, 0.95f, -0.95f );
+        GlStateManager.translatef( -0.5f, -0.5f, 0.0f );
 
         drawPrintout( stack );
 
@@ -86,7 +86,7 @@ public final class ItemPrintoutRenderer extends ItemMapLikeRenderer
     private static void drawPrintout( ItemStack stack )
     {
         int pages = ItemPrintout.getPageCount( stack );
-        boolean book = ItemPrintout.getType( stack ) == ItemPrintout.Type.Book;
+        boolean book = ((ItemPrintout) stack.getItem()).getType() == ItemPrintout.Type.BOOK;
 
         double width = LINE_MAX_LENGTH * FONT_WIDTH + X_TEXT_MARGIN * 2;
         double height = LINES_PER_PAGE * FONT_HEIGHT + Y_TEXT_MARGIN * 2;
@@ -107,8 +107,8 @@ public final class ItemPrintoutRenderer extends ItemMapLikeRenderer
 
         // Scale the printout to fit correctly.
         double scale = 1.0 / max;
-        GlStateManager.scale( scale, scale, scale );
-        GlStateManager.translate( (max - width) / 2.0f, (max - height) / 2.0f, 0.0f );
+        GlStateManager.scaled( scale, scale, scale );
+        GlStateManager.translated( (max - width) / 2.0, (max - height) / 2.0, 0.0 );
 
         drawBorder( 0, 0, -0.01, 0, pages, book );
         drawText( X_TEXT_MARGIN, Y_TEXT_MARGIN, 0, ItemPrintout.getText( stack ), ItemPrintout.getColours( stack ) );

src/main/java/dan200/computercraft/client/render/ModelTransformer.java

@@ -1,14 +1,15 @@
 /*
  * This file is part of ComputerCraft - http://www.computercraft.info
- * Copyright Daniel Ratcliffe, 2011-2020. Do not distribute without permission.
+ * Copyright Daniel Ratcliffe, 2011-2019. Do not distribute without permission.
  * Send enquiries to dratcliffe@gmail.com
  */
+
 package dan200.computercraft.client.render;
 
-import net.minecraft.client.renderer.block.model.BakedQuad;
+import net.minecraft.client.renderer.model.BakedQuad;
 import net.minecraft.client.renderer.texture.TextureAtlasSprite;
 import net.minecraft.client.renderer.vertex.VertexFormat;
-import net.minecraft.util.EnumFacing;
+import net.minecraft.util.Direction;
 import net.minecraftforge.client.model.pipeline.IVertexConsumer;
 import net.minecraftforge.client.model.pipeline.LightUtil;
 import net.minecraftforge.client.model.pipeline.VertexTransformer;
@@ -101,7 +102,7 @@ public final class ModelTransformer
         }
 
         @Override
-        public void setQuadOrientation( @Nonnull EnumFacing orientation )
+        public void setQuadOrientation( @Nonnull Direction orientation )
         {
             super.setQuadOrientation( orientation == null ? orientation : TRSRTransformation.rotate( positionMatrix, orientation ) );
         }
@@ -186,7 +187,7 @@ public final class ModelTransformer
         private final int[] vertexData;
         private int vertexIndex = 0, elementIndex = 0;
 
-        private EnumFacing orientation;
+        private Direction orientation;
         private int quadTint;
         private boolean diffuse;
         private TextureAtlasSprite texture;
@@ -211,7 +212,7 @@ public final class ModelTransformer
         }
 
         @Override
-        public void setQuadOrientation( @Nonnull EnumFacing orientation )
+        public void setQuadOrientation( @Nonnull Direction orientation )
         {
             this.orientation = orientation;
         }

src/main/java/dan200/computercraft/client/render/MonitorHighlightRenderer.java

@@ -1,33 +1,36 @@
 /*
  * This file is part of ComputerCraft - http://www.computercraft.info
- * Copyright Daniel Ratcliffe, 2011-2020. Do not distribute without permission.
+ * Copyright Daniel Ratcliffe, 2011-2019. Do not distribute without permission.
  * Send enquiries to dratcliffe@gmail.com
  */
+
 package dan200.computercraft.client.render;
 
+import com.mojang.blaze3d.platform.GlStateManager;
 import dan200.computercraft.ComputerCraft;
 import dan200.computercraft.shared.peripheral.monitor.TileMonitor;
+import net.minecraft.client.Minecraft;
 import net.minecraft.client.renderer.BufferBuilder;
-import net.minecraft.client.renderer.GlStateManager;
 import net.minecraft.client.renderer.Tessellator;
 import net.minecraft.client.renderer.vertex.DefaultVertexFormats;
-import net.minecraft.entity.player.EntityPlayer;
 import net.minecraft.tileentity.TileEntity;
-import net.minecraft.util.EnumFacing;
+import net.minecraft.util.Direction;
 import net.minecraft.util.math.BlockPos;
+import net.minecraft.util.math.BlockRayTraceResult;
 import net.minecraft.util.math.RayTraceResult;
+import net.minecraft.util.math.Vec3d;
 import net.minecraft.world.World;
+import net.minecraftforge.api.distmarker.Dist;
 import net.minecraftforge.client.event.DrawBlockHighlightEvent;
+import net.minecraftforge.eventbus.api.SubscribeEvent;
 import net.minecraftforge.fml.common.Mod;
-import net.minecraftforge.fml.common.eventhandler.SubscribeEvent;
-import net.minecraftforge.fml.relauncher.Side;
 import org.lwjgl.opengl.GL11;
 
 import java.util.EnumSet;
 
-import static net.minecraft.util.EnumFacing.*;
+import static net.minecraft.util.Direction.*;
 
-@Mod.EventBusSubscriber( modid = ComputerCraft.MOD_ID, value = Side.CLIENT )
+@Mod.EventBusSubscriber( modid = ComputerCraft.MOD_ID, value = Dist.CLIENT )
 public final class MonitorHighlightRenderer
 {
     private static final float EXPAND = 0.002f;
@@ -39,12 +42,13 @@ public final class MonitorHighlightRenderer
     @SubscribeEvent
     public static void drawHighlight( DrawBlockHighlightEvent event )
     {
-        if( event.getTarget().typeOfHit != RayTraceResult.Type.BLOCK || event.getPlayer().isSneaking() ) return;
+        if( event.getTarget().getType() != RayTraceResult.Type.BLOCK || event.getInfo().getRenderViewEntity().isSneaking() )
+        {
+            return;
+        }
 
-        World world = event.getPlayer().getEntityWorld();
-        BlockPos pos = event.getTarget().getBlockPos();
-
-        if( world.getBlockState( pos ).getBlock() != ComputerCraft.Blocks.peripheral ) return;
+        World world = event.getInfo().getRenderViewEntity().getEntityWorld();
+        BlockPos pos = ((BlockRayTraceResult) event.getTarget()).getPos();
 
         TileEntity tile = world.getTileEntity( pos );
         if( !(tile instanceof TileMonitor) ) return;
@@ -53,8 +57,8 @@ public final class MonitorHighlightRenderer
         event.setCanceled( true );
 
         // Determine which sides are part of the external faces of the monitor, and so which need to be rendered.
-        EnumSet<EnumFacing> faces = EnumSet.allOf( EnumFacing.class );
-        EnumFacing front = monitor.getFront();
+        EnumSet<Direction> faces = EnumSet.allOf( Direction.class );
+        Direction front = monitor.getFront();
         faces.remove( front );
         if( monitor.getXIndex() != 0 ) faces.remove( monitor.getRight().getOpposite() );
         if( monitor.getXIndex() != monitor.getWidth() - 1 ) faces.remove( monitor.getRight() );
@@ -62,18 +66,14 @@ public final class MonitorHighlightRenderer
         if( monitor.getYIndex() != monitor.getHeight() - 1 ) faces.remove( monitor.getDown() );
 
         GlStateManager.enableBlend();
-        GlStateManager.tryBlendFuncSeparate( GlStateManager.SourceFactor.SRC_ALPHA, GlStateManager.DestFactor.ONE_MINUS_SRC_ALPHA, GlStateManager.SourceFactor.ONE, GlStateManager.DestFactor.ZERO );
-        GL11.glLineWidth( 2.0F );
-        GlStateManager.disableTexture2D();
+        GlStateManager.blendFuncSeparate( GlStateManager.SourceFactor.SRC_ALPHA, GlStateManager.DestFactor.ONE_MINUS_SRC_ALPHA, GlStateManager.SourceFactor.ONE, GlStateManager.DestFactor.ZERO );
+        GlStateManager.lineWidth( Math.max( 2.5F, (float) Minecraft.getInstance().mainWindow.getFramebufferWidth() / 1920.0F * 2.5F ) );
+        GlStateManager.disableTexture();
         GlStateManager.depthMask( false );
         GlStateManager.pushMatrix();
 
-        EntityPlayer player = event.getPlayer();
-        double x = player.lastTickPosX + (player.posX - player.lastTickPosX) * event.getPartialTicks();
-        double y = player.lastTickPosY + (player.posY - player.lastTickPosY) * event.getPartialTicks();
-        double z = player.lastTickPosZ + (player.posZ - player.lastTickPosZ) * event.getPartialTicks();
-
-        GlStateManager.translate( -x + pos.getX(), -y + pos.getY(), -z + pos.getZ() );
+        Vec3d cameraPos = event.getInfo().getProjectedView();
+        GlStateManager.translated( pos.getX() - cameraPos.getX(), pos.getY() - cameraPos.getY(), pos.getZ() - cameraPos.getZ() );
 
         Tessellator tessellator = Tessellator.getInstance();
         BufferBuilder buffer = tessellator.getBuffer();
@@ -97,11 +97,11 @@ public final class MonitorHighlightRenderer
 
         GlStateManager.popMatrix();
         GlStateManager.depthMask( true );
-        GlStateManager.enableTexture2D();
+        GlStateManager.enableTexture();
         GlStateManager.disableBlend();
     }
 
-    private static void line( BufferBuilder buffer, int x, int y, int z, EnumFacing direction )
+    private static void line( BufferBuilder buffer, int x, int y, int z, Direction direction )
     {
         double minX = x == 0 ? -EXPAND : 1 + EXPAND;
         double minY = y == 0 ? -EXPAND : 1 + EXPAND;

src/main/java/dan200/computercraft/client/render/PrintoutRenderer.java

@@ -1,18 +1,19 @@
 /*
  * This file is part of ComputerCraft - http://www.computercraft.info
- * Copyright Daniel Ratcliffe, 2011-2020. Do not distribute without permission.
+ * Copyright Daniel Ratcliffe, 2011-2019. Do not distribute without permission.
  * Send enquiries to dratcliffe@gmail.com
  */
+
 package dan200.computercraft.client.render;
 
+import com.mojang.blaze3d.platform.GlStateManager;
+import com.mojang.blaze3d.platform.GlStateManager.DestFactor;
+import com.mojang.blaze3d.platform.GlStateManager.SourceFactor;
 import dan200.computercraft.client.gui.FixedWidthFontRenderer;
 import dan200.computercraft.core.terminal.TextBuffer;
 import dan200.computercraft.shared.util.Palette;
 import net.minecraft.client.Minecraft;
 import net.minecraft.client.renderer.BufferBuilder;
-import net.minecraft.client.renderer.GlStateManager;
-import net.minecraft.client.renderer.GlStateManager.DestFactor;
-import net.minecraft.client.renderer.GlStateManager.SourceFactor;
 import net.minecraft.client.renderer.Tessellator;
 import net.minecraft.client.renderer.vertex.DefaultVertexFormats;
 import net.minecraft.util.ResourceLocation;
@@ -73,10 +74,10 @@ public final class PrintoutRenderer
 
     public static void drawText( int x, int y, int start, String[] text, String[] colours )
     {
-        GlStateManager.color( 1.0f, 1.0f, 1.0f, 1.0f );
+        GlStateManager.color4f( 1.0f, 1.0f, 1.0f, 1.0f );
         GlStateManager.enableBlend();
-        GlStateManager.enableTexture2D();
-        GlStateManager.tryBlendFuncSeparate( SourceFactor.SRC_ALPHA, DestFactor.ONE_MINUS_SRC_ALPHA, SourceFactor.ONE, DestFactor.ZERO );
+        GlStateManager.enableTexture();
+        GlStateManager.blendFuncSeparate( SourceFactor.SRC_ALPHA, DestFactor.ONE_MINUS_SRC_ALPHA, SourceFactor.ONE, DestFactor.ZERO );
 
         FixedWidthFontRenderer fontRenderer = FixedWidthFontRenderer.instance();
 
@@ -88,12 +89,12 @@ public final class PrintoutRenderer
 
     public static void drawBorder( double x, double y, double z, int page, int pages, boolean isBook )
     {
-        GlStateManager.color( 1.0f, 1.0f, 1.0f, 1.0f );
+        GlStateManager.color4f( 1.0f, 1.0f, 1.0f, 1.0f );
         GlStateManager.enableBlend();
-        GlStateManager.enableTexture2D();
-        GlStateManager.tryBlendFuncSeparate( SourceFactor.SRC_ALPHA, DestFactor.ONE_MINUS_SRC_ALPHA, SourceFactor.ONE, DestFactor.ZERO );
+        GlStateManager.enableTexture();
+        GlStateManager.blendFuncSeparate( SourceFactor.SRC_ALPHA, DestFactor.ONE_MINUS_SRC_ALPHA, SourceFactor.ONE, DestFactor.ZERO );
 
-        Minecraft.getMinecraft().getTextureManager().bindTexture( BG );
+        Minecraft.getInstance().getTextureManager().bindTexture( BG );
 
         Tessellator tessellator = Tessellator.getInstance();
         BufferBuilder buffer = tessellator.getBuffer();

src/main/java/dan200/computercraft/client/render/TileEntityCableRenderer.java

@@ -1,90 +1,99 @@
 /*
  * This file is part of ComputerCraft - http://www.computercraft.info
- * Copyright Daniel Ratcliffe, 2011-2020. Do not distribute without permission.
+ * Copyright Daniel Ratcliffe, 2011-2019. Do not distribute without permission.
  * Send enquiries to dratcliffe@gmail.com
  */
+
 package dan200.computercraft.client.render;
 
+import com.mojang.blaze3d.platform.GlStateManager;
 import dan200.computercraft.ComputerCraft;
-import dan200.computercraft.shared.peripheral.PeripheralType;
 import dan200.computercraft.shared.peripheral.modem.wired.BlockCable;
-import dan200.computercraft.shared.peripheral.modem.wired.BlockCableModemVariant;
-import dan200.computercraft.shared.peripheral.modem.wired.CableBounds;
+import dan200.computercraft.shared.peripheral.modem.wired.CableModemVariant;
+import dan200.computercraft.shared.peripheral.modem.wired.CableShapes;
 import dan200.computercraft.shared.peripheral.modem.wired.TileCable;
 import dan200.computercraft.shared.util.WorldUtil;
 import net.minecraft.block.Block;
-import net.minecraft.block.state.IBlockState;
+import net.minecraft.block.BlockState;
 import net.minecraft.client.Minecraft;
 import net.minecraft.client.renderer.BufferBuilder;
-import net.minecraft.client.renderer.GlStateManager;
-import net.minecraft.client.renderer.RenderGlobal;
 import net.minecraft.client.renderer.Tessellator;
-import net.minecraft.client.renderer.block.model.IBakedModel;
+import net.minecraft.client.renderer.WorldRenderer;
+import net.minecraft.client.renderer.model.IBakedModel;
 import net.minecraft.client.renderer.texture.TextureAtlasSprite;
-import net.minecraft.client.renderer.tileentity.TileEntitySpecialRenderer;
+import net.minecraft.client.renderer.tileentity.TileEntityRenderer;
 import net.minecraft.client.renderer.vertex.DefaultVertexFormats;
 import net.minecraft.util.BlockRenderLayer;
+import net.minecraft.util.ResourceLocation;
 import net.minecraft.util.math.BlockPos;
+import net.minecraft.util.math.BlockRayTraceResult;
 import net.minecraft.util.math.RayTraceResult;
 import net.minecraft.world.World;
 import net.minecraftforge.client.ForgeHooksClient;
-import net.minecraftforge.client.MinecraftForgeClient;
+import net.minecraftforge.client.model.data.EmptyModelData;
 import org.lwjgl.opengl.GL11;
 
 import javax.annotation.Nonnull;
+import java.util.Random;
 
 /**
  * Render breaking animation only over part of a {@link TileCable}.
  */
-public class TileEntityCableRenderer extends TileEntitySpecialRenderer<TileCable>
+public class TileEntityCableRenderer extends TileEntityRenderer<TileCable>
 {
+    private static final ResourceLocation[] DESTROY_STAGES = new ResourceLocation[10];
+    private static final Random random = new Random();
+
+    static
+    {
+        for( int i = 0; i < DESTROY_STAGES.length; i++ )
+        {
+            DESTROY_STAGES[i] = new ResourceLocation( "block/destroy_stage_" + i );
+        }
+    }
+
     @Override
-    public void render( @Nonnull TileCable te, double x, double y, double z, float partialTicks, int destroyStage, float alpha )
+    public void render( @Nonnull TileCable te, double x, double y, double z, float partialTicks, int destroyStage )
     {
         if( destroyStage < 0 ) return;
 
         BlockPos pos = te.getPos();
 
-        Minecraft mc = Minecraft.getMinecraft();
+        Minecraft mc = Minecraft.getInstance();
 
         RayTraceResult hit = mc.objectMouseOver;
-        if( hit == null || !hit.getBlockPos().equals( pos ) ) return;
-
-        if( MinecraftForgeClient.getRenderPass() != 0 ) return;
+        if( hit == null || hit.getType() != RayTraceResult.Type.BLOCK || !((BlockRayTraceResult) hit).getPos().equals( pos ) )
+        {
+            return;
+        }
 
         World world = te.getWorld();
-        IBlockState state = world.getBlockState( pos );
+        BlockState state = world.getBlockState( pos );
         Block block = state.getBlock();
         if( block != ComputerCraft.Blocks.cable ) return;
 
-        state = state.getActualState( world, pos );
-        if( te.getPeripheralType() != PeripheralType.Cable && WorldUtil.isVecInsideInclusive( CableBounds.getModemBounds( state ), hit.hitVec.subtract( pos.getX(), pos.getY(), pos.getZ() ) ) )
-        {
-            state = block.getDefaultState().withProperty( BlockCable.MODEM, state.getValue( BlockCable.MODEM ) );
-        }
-        else
-        {
-            state = state.withProperty( BlockCable.MODEM, BlockCableModemVariant.None );
-        }
+        state = WorldUtil.isVecInside( CableShapes.getModemShape( state ), hit.getHitVec().subtract( pos.getX(), pos.getY(), pos.getZ() ) )
+            ? block.getDefaultState().with( BlockCable.MODEM, state.get( BlockCable.MODEM ) )
+            : state.with( BlockCable.MODEM, CableModemVariant.None );
 
         IBakedModel model = mc.getBlockRendererDispatcher().getModelForState( state );
-        if( model == null ) return;
 
         preRenderDamagedBlocks();
 
+        ForgeHooksClient.setRenderLayer( block.getRenderLayer() );
+
+        // See BlockRendererDispatcher#renderBlockDamage
+        TextureAtlasSprite breakingTexture = mc.getTextureMap().getSprite( DESTROY_STAGES[destroyStage] );
+
         BufferBuilder buffer = Tessellator.getInstance().getBuffer();
         buffer.begin( GL11.GL_QUADS, DefaultVertexFormats.BLOCK );
         buffer.setTranslation( x - pos.getX(), y - pos.getY(), z - pos.getZ() );
         buffer.noColor();
 
-        ForgeHooksClient.setRenderLayer( block.getRenderLayer() );
-
-        // See BlockRendererDispatcher#renderBlockDamage
-        TextureAtlasSprite breakingTexture = mc.getTextureMapBlocks().getAtlasSprite( "minecraft:blocks/destroy_stage_" + destroyStage );
-        Minecraft.getMinecraft().getBlockRendererDispatcher().getBlockModelRenderer().renderModel(
+        mc.getBlockRendererDispatcher().getBlockModelRenderer().renderModel(
             world,
-            ForgeHooksClient.getDamageModel( model, breakingTexture, state, world, pos ),
-            state, pos, buffer, true
+            ForgeHooksClient.getDamageModel( model, breakingTexture, state, world, pos, 0 ),
+            state, pos, buffer, true, random, state.getPositionRandom( pos ), EmptyModelData.INSTANCE
         );
 
         ForgeHooksClient.setRenderLayer( BlockRenderLayer.SOLID );
@@ -98,32 +107,32 @@ public class TileEntityCableRenderer extends TileEntitySpecialRenderer<TileCable
     /**
      * Set up the state for rendering block-breaking progress.
      *
-     * @see RenderGlobal#preRenderDamagedBlocks()
+     * @see WorldRenderer#preRenderDamagedBlocks()
      */
     private void preRenderDamagedBlocks()
     {
         GlStateManager.disableLighting();
 
         GlStateManager.enableBlend();
-        GlStateManager.tryBlendFuncSeparate( GlStateManager.SourceFactor.DST_COLOR, GlStateManager.DestFactor.SRC_COLOR, GlStateManager.SourceFactor.ONE, GlStateManager.DestFactor.ZERO );
+        GlStateManager.blendFuncSeparate( GlStateManager.SourceFactor.DST_COLOR, GlStateManager.DestFactor.SRC_COLOR, GlStateManager.SourceFactor.ONE, GlStateManager.DestFactor.ZERO );
         GlStateManager.enableBlend();
-        GlStateManager.color( 1.0F, 1.0F, 1.0F, 0.5F );
-        GlStateManager.doPolygonOffset( -3.0F, -3.0F );
+        GlStateManager.color4f( 1.0F, 1.0F, 1.0F, 0.5F );
+        GlStateManager.polygonOffset( -3.0F, -3.0F );
         GlStateManager.enablePolygonOffset();
         GlStateManager.alphaFunc( 516, 0.1F );
-        GlStateManager.enableAlpha();
+        GlStateManager.enableAlphaTest();
         GlStateManager.pushMatrix();
     }
 
     /**
      * Tear down the state for rendering block-breaking progress.
      *
-     * @see RenderGlobal#postRenderDamagedBlocks()
+     * @see WorldRenderer#postRenderDamagedBlocks()
      */
     private void postRenderDamagedBlocks()
     {
-        GlStateManager.disableAlpha();
-        GlStateManager.doPolygonOffset( 0.0F, 0.0F );
+        GlStateManager.disableAlphaTest();
+        GlStateManager.polygonOffset( 0.0F, 0.0F );
         GlStateManager.disablePolygonOffset();
         GlStateManager.disablePolygonOffset();
         GlStateManager.depthMask( true );

src/main/java/dan200/computercraft/client/render/TileEntityMonitorRenderer.java

@@ -1,10 +1,13 @@
 /*
  * This file is part of ComputerCraft - http://www.computercraft.info
- * Copyright Daniel Ratcliffe, 2011-2020. Do not distribute without permission.
+ * Copyright Daniel Ratcliffe, 2011-2019. Do not distribute without permission.
  * Send enquiries to dratcliffe@gmail.com
  */
+
 package dan200.computercraft.client.render;
 
+import com.mojang.blaze3d.platform.GLX;
+import com.mojang.blaze3d.platform.GlStateManager;
 import dan200.computercraft.client.FrameInfo;
 import dan200.computercraft.client.gui.FixedWidthFontRenderer;
 import dan200.computercraft.core.terminal.Terminal;
@@ -16,19 +19,17 @@ import dan200.computercraft.shared.util.DirectionUtil;
 import dan200.computercraft.shared.util.Palette;
 import net.minecraft.client.Minecraft;
 import net.minecraft.client.renderer.BufferBuilder;
-import net.minecraft.client.renderer.GlStateManager;
-import net.minecraft.client.renderer.OpenGlHelper;
 import net.minecraft.client.renderer.Tessellator;
-import net.minecraft.client.renderer.tileentity.TileEntitySpecialRenderer;
+import net.minecraft.client.renderer.tileentity.TileEntityRenderer;
 import net.minecraft.client.renderer.vertex.DefaultVertexFormats;
-import net.minecraft.util.EnumFacing;
+import net.minecraft.util.Direction;
 import net.minecraft.util.math.BlockPos;
 import org.lwjgl.opengl.GL11;
 
-public class TileEntityMonitorRenderer extends TileEntitySpecialRenderer<TileMonitor>
+public class TileEntityMonitorRenderer extends TileEntityRenderer<TileMonitor>
 {
     @Override
-    public void render( TileMonitor tileEntity, double posX, double posY, double posZ, float f, int i, float f2 )
+    public void render( TileMonitor tileEntity, double posX, double posY, double posZ, float f, int i )
     {
         if( tileEntity != null )
         {
@@ -63,8 +64,8 @@ public class TileEntityMonitorRenderer extends TileEntitySpecialRenderer<TileMon
         posZ += originPos.getZ() - monitorPos.getZ();
 
         // Determine orientation
-        EnumFacing dir = origin.getDirection();
-        EnumFacing front = origin.getFront();
+        Direction dir = origin.getDirection();
+        Direction front = origin.getFront();
         float yaw = dir.getHorizontalAngle();
         float pitch = DirectionUtil.toPitchAngle( front );
 
@@ -72,19 +73,19 @@ public class TileEntityMonitorRenderer extends TileEntitySpecialRenderer<TileMon
         try
         {
             // Setup initial transform
-            GlStateManager.translate( posX + 0.5, posY + 0.5, posZ + 0.5 );
-            GlStateManager.rotate( -yaw, 0.0f, 1.0f, 0.0f );
-            GlStateManager.rotate( pitch, 1.0f, 0.0f, 0.0f );
-            GlStateManager.translate(
+            GlStateManager.translated( posX + 0.5, posY + 0.5, posZ + 0.5 );
+            GlStateManager.rotatef( -yaw, 0.0f, 1.0f, 0.0f );
+            GlStateManager.rotatef( pitch, 1.0f, 0.0f, 0.0f );
+            GlStateManager.translated(
                 -0.5 + TileMonitor.RENDER_BORDER + TileMonitor.RENDER_MARGIN,
-                origin.getHeight() - 0.5 - (TileMonitor.RENDER_BORDER + TileMonitor.RENDER_MARGIN),
+                origin.getHeight() - 0.5 - (TileMonitor.RENDER_BORDER + TileMonitor.RENDER_MARGIN) + 0,
                 0.5
             );
             double xSize = origin.getWidth() - 2.0 * (TileMonitor.RENDER_MARGIN + TileMonitor.RENDER_BORDER);
             double ySize = origin.getHeight() - 2.0 * (TileMonitor.RENDER_MARGIN + TileMonitor.RENDER_BORDER);
 
             // Get renderers
-            Minecraft mc = Minecraft.getMinecraft();
+            Minecraft mc = Minecraft.getInstance();
             Tessellator tessellator = Tessellator.getInstance();
             BufferBuilder renderer = tessellator.getBuffer();
 
@@ -93,9 +94,9 @@ public class TileEntityMonitorRenderer extends TileEntitySpecialRenderer<TileMon
 
             // Draw the contents
             GlStateManager.depthMask( false );
-            OpenGlHelper.setLightmapTextureCoords( OpenGlHelper.lightmapTexUnit, 0xFF, 0xFF );
+            GLX.glMultiTexCoord2f( GLX.GL_TEXTURE1, 0xFFFF, 0xFFFF );
             GlStateManager.disableLighting();
-            mc.entityRenderer.disableLightmap();
+            mc.gameRenderer.disableLightmap();
             try
             {
                 Terminal terminal = originTerminal.getTerminal();
@@ -123,14 +124,14 @@ public class TileEntityMonitorRenderer extends TileEntitySpecialRenderer<TileMon
                     {
                         double xScale = xSize / (width * FixedWidthFontRenderer.FONT_WIDTH);
                         double yScale = ySize / (height * FixedWidthFontRenderer.FONT_HEIGHT);
-                        GlStateManager.scale( xScale, -yScale, 1.0 );
+                        GlStateManager.scaled( xScale, -yScale, 1.0 );
 
                         // Draw background
                         mc.getTextureManager().bindTexture( FixedWidthFontRenderer.BACKGROUND );
                         if( redraw )
                         {
                             // Build background display list
-                            GlStateManager.glNewList( originTerminal.renderDisplayLists[0], GL11.GL_COMPILE );
+                            GlStateManager.newList( originTerminal.renderDisplayLists[0], GL11.GL_COMPILE );
                             try
                             {
                                 double marginXSize = TileMonitor.RENDER_MARGIN / xScale;
@@ -141,10 +142,10 @@ public class TileEntityMonitorRenderer extends TileEntitySpecialRenderer<TileMon
                                 GlStateManager.pushMatrix();
                                 try
                                 {
-                                    GlStateManager.scale( 1.0, marginSquash, 1.0 );
-                                    GlStateManager.translate( 0.0, -marginYSize / marginSquash, 0.0 );
+                                    GlStateManager.scaled( 1.0, marginSquash, 1.0 );
+                                    GlStateManager.translated( 0.0, -marginYSize / marginSquash, 0.0 );
                                     fontRenderer.drawStringBackgroundPart( 0, 0, terminal.getBackgroundColourLine( 0 ), marginXSize, marginXSize, greyscale, palette );
-                                    GlStateManager.translate( 0.0, (marginYSize + height * FixedWidthFontRenderer.FONT_HEIGHT) / marginSquash, 0.0 );
+                                    GlStateManager.translated( 0.0, (marginYSize + height * FixedWidthFontRenderer.FONT_HEIGHT) / marginSquash, 0.0 );
                                     fontRenderer.drawStringBackgroundPart( 0, 0, terminal.getBackgroundColourLine( height - 1 ), marginXSize, marginXSize, greyscale, palette );
                                 }
                                 finally
@@ -166,18 +167,18 @@ public class TileEntityMonitorRenderer extends TileEntitySpecialRenderer<TileMon
                             }
                             finally
                             {
-                                GlStateManager.glEndList();
+                                GlStateManager.endList();
                             }
                         }
                         GlStateManager.callList( originTerminal.renderDisplayLists[0] );
-                        GlStateManager.resetColor();
+                        GlStateManager.clearCurrentColor();
 
                         // Draw text
                         fontRenderer.bindFont();
                         if( redraw )
                         {
                             // Build text display list
-                            GlStateManager.glNewList( originTerminal.renderDisplayLists[1], GL11.GL_COMPILE );
+                            GlStateManager.newList( originTerminal.renderDisplayLists[1], GL11.GL_COMPILE );
                             try
                             {
                                 // Lines
@@ -194,18 +195,18 @@ public class TileEntityMonitorRenderer extends TileEntitySpecialRenderer<TileMon
                             }
                             finally
                             {
-                                GlStateManager.glEndList();
+                                GlStateManager.endList();
                             }
                         }
                         GlStateManager.callList( originTerminal.renderDisplayLists[1] );
-                        GlStateManager.resetColor();
+                        GlStateManager.clearCurrentColor();
 
                         // Draw cursor
                         fontRenderer.bindFont();
                         if( redraw )
                         {
                             // Build cursor display list
-                            GlStateManager.glNewList( originTerminal.renderDisplayLists[2], GL11.GL_COMPILE );
+                            GlStateManager.newList( originTerminal.renderDisplayLists[2], GL11.GL_COMPILE );
                             try
                             {
                                 // Cursor
@@ -226,13 +227,13 @@ public class TileEntityMonitorRenderer extends TileEntitySpecialRenderer<TileMon
                             }
                             finally
                             {
-                                GlStateManager.glEndList();
+                                GlStateManager.endList();
                             }
                         }
                         if( FrameInfo.getGlobalCursorBlink() )
                         {
                             GlStateManager.callList( originTerminal.renderDisplayLists[2] );
-                            GlStateManager.resetColor();
+                            GlStateManager.clearCurrentColor();
                         }
                     }
                     finally
@@ -261,7 +262,7 @@ public class TileEntityMonitorRenderer extends TileEntitySpecialRenderer<TileMon
             finally
             {
                 GlStateManager.depthMask( true );
-                mc.entityRenderer.enableLightmap();
+                mc.gameRenderer.enableLightmap();
                 GlStateManager.enableLighting();
             }
 
@@ -284,7 +285,7 @@ public class TileEntityMonitorRenderer extends TileEntitySpecialRenderer<TileMon
         }
         finally
         {
-            GlStateManager.color( 1.0f, 1.0f, 1.0f, 1.0f );
+            GlStateManager.color4f( 1.0f, 1.0f, 1.0f, 1.0f );
             GlStateManager.popMatrix();
         }
     }

src/main/java/dan200/computercraft/client/render/TileEntityTurtleRenderer.java

@@ -1,50 +1,56 @@
 /*
  * This file is part of ComputerCraft - http://www.computercraft.info
- * Copyright Daniel Ratcliffe, 2011-2020. Do not distribute without permission.
+ * Copyright Daniel Ratcliffe, 2011-2019. Do not distribute without permission.
  * Send enquiries to dratcliffe@gmail.com
  */
+
 package dan200.computercraft.client.render;
 
+import com.mojang.blaze3d.platform.GlStateManager;
 import dan200.computercraft.api.turtle.ITurtleUpgrade;
 import dan200.computercraft.api.turtle.TurtleSide;
 import dan200.computercraft.shared.computer.core.ComputerFamily;
 import dan200.computercraft.shared.turtle.blocks.TileTurtle;
+import dan200.computercraft.shared.util.DirectionUtil;
 import dan200.computercraft.shared.util.Holiday;
 import dan200.computercraft.shared.util.HolidayUtil;
-import net.minecraft.block.state.IBlockState;
+import net.minecraft.block.BlockState;
 import net.minecraft.client.Minecraft;
 import net.minecraft.client.renderer.BufferBuilder;
-import net.minecraft.client.renderer.EntityRenderer;
-import net.minecraft.client.renderer.GlStateManager;
+import net.minecraft.client.renderer.GameRenderer;
 import net.minecraft.client.renderer.Tessellator;
-import net.minecraft.client.renderer.block.model.BakedQuad;
-import net.minecraft.client.renderer.block.model.IBakedModel;
-import net.minecraft.client.renderer.block.model.ModelManager;
-import net.minecraft.client.renderer.block.model.ModelResourceLocation;
-import net.minecraft.client.renderer.texture.TextureMap;
-import net.minecraft.client.renderer.tileentity.TileEntitySpecialRenderer;
+import net.minecraft.client.renderer.model.BakedQuad;
+import net.minecraft.client.renderer.model.IBakedModel;
+import net.minecraft.client.renderer.model.ModelManager;
+import net.minecraft.client.renderer.model.ModelResourceLocation;
+import net.minecraft.client.renderer.texture.AtlasTexture;
+import net.minecraft.client.renderer.tileentity.TileEntityRenderer;
 import net.minecraft.client.renderer.vertex.DefaultVertexFormats;
 import net.minecraft.client.renderer.vertex.VertexFormat;
-import net.minecraft.util.EnumFacing;
+import net.minecraft.util.Direction;
 import net.minecraft.util.ResourceLocation;
+import net.minecraft.util.math.BlockRayTraceResult;
+import net.minecraft.util.math.RayTraceResult;
 import net.minecraft.util.math.Vec3d;
 import net.minecraftforge.client.ForgeHooksClient;
+import net.minecraftforge.client.model.data.EmptyModelData;
 import net.minecraftforge.client.model.pipeline.LightUtil;
 import org.apache.commons.lang3.tuple.Pair;
 import org.lwjgl.opengl.GL11;
 
 import javax.vecmath.Matrix4f;
 import java.util.List;
+import java.util.Random;
 
-public class TileEntityTurtleRenderer extends TileEntitySpecialRenderer<TileTurtle>
+public class TileEntityTurtleRenderer extends TileEntityRenderer<TileTurtle>
 {
-    private static final ModelResourceLocation NORMAL_TURTLE_MODEL = new ModelResourceLocation( "computercraft:turtle", "inventory" );
+    private static final ModelResourceLocation NORMAL_TURTLE_MODEL = new ModelResourceLocation( "computercraft:turtle_normal", "inventory" );
     private static final ModelResourceLocation ADVANCED_TURTLE_MODEL = new ModelResourceLocation( "computercraft:turtle_advanced", "inventory" );
-    private static final ModelResourceLocation COLOUR_TURTLE_MODEL = new ModelResourceLocation( "computercraft:turtle_white", "inventory" );
+    private static final ModelResourceLocation COLOUR_TURTLE_MODEL = new ModelResourceLocation( "computercraft:turtle_colour", "inventory" );
     private static final ModelResourceLocation ELF_OVERLAY_MODEL = new ModelResourceLocation( "computercraft:turtle_elf_overlay", "inventory" );
 
     @Override
-    public void render( TileTurtle tileEntity, double posX, double posY, double posZ, float partialTicks, int breaking, float f2 )
+    public void render( TileTurtle tileEntity, double posX, double posY, double posZ, float partialTicks, int breaking )
     {
         if( tileEntity != null ) renderTurtleAt( tileEntity, posX, posY, posZ, partialTicks );
     }
@@ -81,13 +87,14 @@ public class TileEntityTurtleRenderer extends TileEntitySpecialRenderer<TileTurt
     {
         // Render the label
         String label = turtle.createProxy().getLabel();
-        if( label != null && rendererDispatcher.cameraHitResult != null && turtle.getPos().equals( rendererDispatcher.cameraHitResult.getBlockPos() ) )
+        RayTraceResult hit = rendererDispatcher.cameraHitResult;
+        if( label != null && hit.getType() == RayTraceResult.Type.BLOCK && turtle.getPos().equals( ((BlockRayTraceResult) hit).getPos() ) )
         {
             setLightmapDisabled( true );
-            EntityRenderer.drawNameplate(
+            GameRenderer.drawNameplate(
                 getFontRenderer(), label,
                 (float) posX + 0.5F, (float) posY + 1.2F, (float) posZ + 0.5F, 0,
-                rendererDispatcher.entityYaw, rendererDispatcher.entityPitch, false, false
+                rendererDispatcher.renderInfo.getYaw(), rendererDispatcher.renderInfo.getPitch(), false
             );
             setLightmapDisabled( false );
         }
@@ -95,22 +102,21 @@ public class TileEntityTurtleRenderer extends TileEntitySpecialRenderer<TileTurt
         GlStateManager.pushMatrix();
         try
         {
-            IBlockState state = turtle.getWorld().getBlockState( turtle.getPos() );
+            BlockState state = turtle.getBlockState();
             // Setup the transform
             Vec3d offset = turtle.getRenderOffset( partialTicks );
             float yaw = turtle.getRenderYaw( partialTicks );
-            GlStateManager.translate( posX + offset.x, posY + offset.y, posZ + offset.z );
-
+            GlStateManager.translated( posX + offset.x, posY + offset.y, posZ + offset.z );
             // Render the turtle
-            GlStateManager.translate( 0.5f, 0.5f, 0.5f );
-            GlStateManager.rotate( 180.0f - yaw, 0.0f, 1.0f, 0.0f );
+            GlStateManager.translatef( 0.5f, 0.5f, 0.5f );
+            GlStateManager.rotatef( 180.0f - yaw, 0.0f, 1.0f, 0.0f );
             if( label != null && (label.equals( "Dinnerbone" ) || label.equals( "Grumm" )) )
             {
                 // Flip the model and swap the cull face as winding order will have changed.
-                GlStateManager.scale( 1.0f, -1.0f, 1.0f );
+                GlStateManager.scalef( 1.0f, -1.0f, 1.0f );
                 GlStateManager.cullFace( GlStateManager.CullFace.FRONT );
             }
-            GlStateManager.translate( -0.5f, -0.5f, -0.5f );
+            GlStateManager.translatef( -0.5f, -0.5f, -0.5f );
             // Render the turtle
             int colour = turtle.getColour();
             ComputerFamily family = turtle.getFamily();
@@ -150,7 +156,7 @@ public class TileEntityTurtleRenderer extends TileEntitySpecialRenderer<TileTurt
         }
     }
 
-    private static void renderUpgrade( IBlockState state, TileTurtle turtle, TurtleSide side, float f )
+    private void renderUpgrade( BlockState state, TileTurtle turtle, TurtleSide side, float f )
     {
         ITurtleUpgrade upgrade = turtle.getUpgrade( side );
         if( upgrade != null )
@@ -159,9 +165,9 @@ public class TileEntityTurtleRenderer extends TileEntitySpecialRenderer<TileTurt
             try
             {
                 float toolAngle = turtle.getToolRenderAngle( side, f );
-                GlStateManager.translate( 0.0f, 0.5f, 0.5f );
-                GlStateManager.rotate( -toolAngle, 1.0f, 0.0f, 0.0f );
-                GlStateManager.translate( 0.0f, -0.5f, -0.5f );
+                GlStateManager.translatef( 0.0f, 0.5f, 0.5f );
+                GlStateManager.rotatef( -toolAngle, 1.0f, 0.0f, 0.0f );
+                GlStateManager.translatef( 0.0f, -0.5f, -0.5f );
 
                 Pair<IBakedModel, Matrix4f> pair = upgrade.getModel( turtle.getAccess(), side );
                 if( pair != null )
@@ -183,22 +189,22 @@ public class TileEntityTurtleRenderer extends TileEntitySpecialRenderer<TileTurt
         }
     }
 
-    private static void renderModel( IBlockState state, ModelResourceLocation modelLocation, int[] tints )
+    private void renderModel( BlockState state, ModelResourceLocation modelLocation, int[] tints )
     {
-        Minecraft mc = Minecraft.getMinecraft();
-        ModelManager modelManager = mc.getRenderItem().getItemModelMesher().getModelManager();
+        Minecraft mc = Minecraft.getInstance();
+        ModelManager modelManager = mc.getItemRenderer().getItemModelMesher().getModelManager();
         renderModel( state, modelManager.getModel( modelLocation ), tints );
     }
 
-    private static void renderModel( IBlockState state, IBakedModel model, int[] tints )
+    private void renderModel( BlockState state, IBakedModel model, int[] tints )
     {
-        Minecraft mc = Minecraft.getMinecraft();
+        Random random = new Random( 0 );
         Tessellator tessellator = Tessellator.getInstance();
-        mc.getTextureManager().bindTexture( TextureMap.LOCATION_BLOCKS_TEXTURE );
-        renderQuads( tessellator, model.getQuads( state, null, 0 ), tints );
-        for( EnumFacing facing : EnumFacing.VALUES )
+        rendererDispatcher.textureManager.bindTexture( AtlasTexture.LOCATION_BLOCKS_TEXTURE );
+        renderQuads( tessellator, model.getQuads( state, null, random, EmptyModelData.INSTANCE ), tints );
+        for( Direction facing : DirectionUtil.FACINGS )
         {
-            renderQuads( tessellator, model.getQuads( state, facing, 0 ), tints );
+            renderQuads( tessellator, model.getQuads( state, facing, random, EmptyModelData.INSTANCE ), tints );
         }
     }
 

src/main/java/dan200/computercraft/client/render/TurtleModelLoader.java

@@ -1,30 +1,34 @@
 /*
  * This file is part of ComputerCraft - http://www.computercraft.info
- * Copyright Daniel Ratcliffe, 2011-2020. Do not distribute without permission.
+ * Copyright Daniel Ratcliffe, 2011-2019. Do not distribute without permission.
  * Send enquiries to dratcliffe@gmail.com
  */
+
 package dan200.computercraft.client.render;
 
-import com.google.common.collect.ImmutableMap;
 import dan200.computercraft.ComputerCraft;
-import net.minecraft.client.renderer.block.model.IBakedModel;
+import net.minecraft.client.renderer.model.IBakedModel;
+import net.minecraft.client.renderer.model.IUnbakedModel;
+import net.minecraft.client.renderer.model.ModelBakery;
+import net.minecraft.client.renderer.texture.ISprite;
 import net.minecraft.client.renderer.texture.TextureAtlasSprite;
 import net.minecraft.client.renderer.vertex.VertexFormat;
-import net.minecraft.client.resources.IResourceManager;
+import net.minecraft.resources.IResourceManager;
 import net.minecraft.util.ResourceLocation;
 import net.minecraftforge.client.model.ICustomModelLoader;
-import net.minecraftforge.client.model.IModel;
-import net.minecraftforge.client.model.ModelLoaderRegistry;
-import net.minecraftforge.common.model.IModelState;
 
 import javax.annotation.Nonnull;
+import java.util.Arrays;
+import java.util.Collection;
+import java.util.Set;
 import java.util.function.Function;
+import java.util.stream.Collectors;
 
 public final class TurtleModelLoader implements ICustomModelLoader
 {
-    private static final ResourceLocation NORMAL_TURTLE_MODEL = new ResourceLocation( ComputerCraft.MOD_ID, "block/turtle" );
-    private static final ResourceLocation ADVANCED_TURTLE_MODEL = new ResourceLocation( ComputerCraft.MOD_ID, "block/advanced_turtle" );
-    private static final ResourceLocation COLOUR_TURTLE_MODEL = new ResourceLocation( ComputerCraft.MOD_ID, "block/turtle_white" );
+    private static final ResourceLocation NORMAL_TURTLE_MODEL = new ResourceLocation( ComputerCraft.MOD_ID, "block/turtle_normal" );
+    private static final ResourceLocation ADVANCED_TURTLE_MODEL = new ResourceLocation( ComputerCraft.MOD_ID, "block/turtle_advanced" );
+    private static final ResourceLocation COLOUR_TURTLE_MODEL = new ResourceLocation( ComputerCraft.MOD_ID, "block/turtle_colour" );
 
     public static final TurtleModelLoader INSTANCE = new TurtleModelLoader();
 
@@ -41,80 +45,60 @@ public final class TurtleModelLoader implements ICustomModelLoader
     public boolean accepts( @Nonnull ResourceLocation name )
     {
         return name.getNamespace().equals( ComputerCraft.MOD_ID )
-            && (name.getPath().equals( "turtle" ) || name.getPath().equals( "turtle_advanced" ));
+            && (name.getPath().equals( "item/turtle_normal" ) || name.getPath().equals( "item/turtle_advanced" ));
     }
 
     @Nonnull
     @Override
-    public IModel loadModel( @Nonnull ResourceLocation name ) throws Exception
+    public IUnbakedModel loadModel( @Nonnull ResourceLocation name )
     {
         if( name.getNamespace().equals( ComputerCraft.MOD_ID ) )
         {
-            IModel colourModel = ModelLoaderRegistry.getModel( COLOUR_TURTLE_MODEL );
             switch( name.getPath() )
             {
-                case "turtle":
-                    return new TurtleModel( ModelLoaderRegistry.getModel( NORMAL_TURTLE_MODEL ), colourModel );
-                case "turtle_advanced":
-                    return new TurtleModel( ModelLoaderRegistry.getModel( ADVANCED_TURTLE_MODEL ), colourModel );
+                case "item/turtle_normal":
+                    return new TurtleModel( NORMAL_TURTLE_MODEL );
+                case "item/turtle_advanced":
+                    return new TurtleModel( ADVANCED_TURTLE_MODEL );
             }
         }
 
         throw new IllegalStateException( "Loader does not accept " + name );
     }
 
-    private static final class TurtleModel implements IModel
+    private static final class TurtleModel implements IUnbakedModel
     {
-        private final IModel family;
-        private final IModel colour;
+        private final ResourceLocation family;
 
-        private TurtleModel( IModel family, IModel colour )
+        private TurtleModel( ResourceLocation family )
         {
             this.family = family;
-            this.colour = colour;
         }
 
         @Nonnull
         @Override
-        public IBakedModel bake( @Nonnull IModelState state, @Nonnull VertexFormat format, @Nonnull Function<ResourceLocation, TextureAtlasSprite> function )
+        public Collection<ResourceLocation> getDependencies()
+        {
+            return Arrays.asList( family, COLOUR_TURTLE_MODEL );
+        }
+
+        @Nonnull
+        @Override
+        public Collection<ResourceLocation> getTextures( @Nonnull Function<ResourceLocation, IUnbakedModel> modelGetter, @Nonnull Set<String> missingTextureErrors )
+        {
+            return getDependencies().stream()
+                .flatMap( x -> modelGetter.apply( x ).getTextures( modelGetter, missingTextureErrors ).stream() )
+                .collect( Collectors.toSet() );
+        }
+
+        @Nonnull
+        @Override
+        public IBakedModel bake( @Nonnull ModelBakery bakery, @Nonnull Function<ResourceLocation, TextureAtlasSprite> spriteGetter, @Nonnull ISprite sprite, @Nonnull VertexFormat format )
         {
             return new TurtleSmartItemModel(
-                family.bake( state, format, function ),
-                colour.bake( state, format, function )
+                bakery.getBakedModel( family, sprite, spriteGetter, format ),
+                bakery.getBakedModel( COLOUR_TURTLE_MODEL, sprite, spriteGetter, format )
             );
         }
-
-        private TurtleModel copy( IModel family, IModel colour )
-        {
-            return this.family == family && this.colour == colour ? this : new TurtleModel( family, colour );
-        }
-
-        @Nonnull
-        @Override
-        public IModel smoothLighting( boolean value )
-        {
-            return copy( family.smoothLighting( value ), colour.smoothLighting( value ) );
-        }
-
-        @Nonnull
-        @Override
-        public IModel gui3d( boolean value )
-        {
-            return copy( family.gui3d( value ), colour.gui3d( value ) );
-        }
-
-        @Nonnull
-        @Override
-        public IModel uvlock( boolean value )
-        {
-            return copy( family.uvlock( value ), colour.uvlock( value ) );
-        }
-
-        @Nonnull
-        @Override
-        public IModel retexture( ImmutableMap<String, String> textures )
-        {
-            return copy( family.retexture( textures ), colour.retexture( textures ) );
-        }
     }
 }

src/main/java/dan200/computercraft/client/render/TurtleMultiModel.java

@@ -1,24 +1,23 @@
 /*
  * This file is part of ComputerCraft - http://www.computercraft.info
- * Copyright Daniel Ratcliffe, 2011-2020. Do not distribute without permission.
+ * Copyright Daniel Ratcliffe, 2011-2019. Do not distribute without permission.
  * Send enquiries to dratcliffe@gmail.com
  */
+
 package dan200.computercraft.client.render;
 
-import net.minecraft.block.state.IBlockState;
-import net.minecraft.client.renderer.block.model.BakedQuad;
-import net.minecraft.client.renderer.block.model.IBakedModel;
-import net.minecraft.client.renderer.block.model.ItemCameraTransforms;
-import net.minecraft.client.renderer.block.model.ItemOverrideList;
+import net.minecraft.block.BlockState;
+import net.minecraft.client.renderer.model.BakedQuad;
+import net.minecraft.client.renderer.model.IBakedModel;
+import net.minecraft.client.renderer.model.ItemOverrideList;
 import net.minecraft.client.renderer.texture.TextureAtlasSprite;
-import net.minecraft.util.EnumFacing;
+import net.minecraft.util.Direction;
+import net.minecraftforge.client.model.data.EmptyModelData;
+import net.minecraftforge.client.model.data.IModelData;
 
 import javax.annotation.Nonnull;
 import javax.vecmath.Matrix4f;
-import java.util.ArrayList;
-import java.util.EnumMap;
-import java.util.List;
-import java.util.Map;
+import java.util.*;
 
 public class TurtleMultiModel implements IBakedModel
 {
@@ -30,7 +29,7 @@ public class TurtleMultiModel implements IBakedModel
     private final IBakedModel m_rightUpgradeModel;
     private final Matrix4f m_rightUpgradeTransform;
     private List<BakedQuad> m_generalQuads = null;
-    private Map<EnumFacing, List<BakedQuad>> m_faceQuads = new EnumMap<>( EnumFacing.class );
+    private Map<Direction, List<BakedQuad>> m_faceQuads = new EnumMap<>( Direction.class );
 
     public TurtleMultiModel( IBakedModel baseModel, IBakedModel overlayModel, Matrix4f generalTransform, IBakedModel leftUpgradeModel, Matrix4f leftUpgradeTransform, IBakedModel rightUpgradeModel, Matrix4f rightUpgradeTransform )
     {
@@ -46,7 +45,15 @@ public class TurtleMultiModel implements IBakedModel
 
     @Nonnull
     @Override
-    public List<BakedQuad> getQuads( IBlockState state, EnumFacing side, long rand )
+    @Deprecated
+    public List<BakedQuad> getQuads( BlockState state, Direction side, @Nonnull Random rand )
+    {
+        return getQuads( state, side, rand, EmptyModelData.INSTANCE );
+    }
+
+    @Nonnull
+    @Override
+    public List<BakedQuad> getQuads( BlockState state, Direction side, @Nonnull Random rand, @Nonnull IModelData data )
     {
         if( side != null )
         {
@@ -60,17 +67,13 @@ public class TurtleMultiModel implements IBakedModel
         }
     }
 
-    private List<BakedQuad> buildQuads( IBlockState state, EnumFacing side, long rand )
+    private List<BakedQuad> buildQuads( BlockState state, Direction side, Random rand )
     {
         ArrayList<BakedQuad> quads = new ArrayList<>();
-        ModelTransformer.transformQuadsTo( quads, m_baseModel.getQuads( state, side, rand ), m_generalTransform );
+        ModelTransformer.transformQuadsTo( quads, m_baseModel.getQuads( state, side, rand, EmptyModelData.INSTANCE ), m_generalTransform );
         if( m_overlayModel != null )
         {
-            ModelTransformer.transformQuadsTo( quads, m_overlayModel.getQuads( state, side, rand ), m_generalTransform );
-        }
-        if( m_overlayModel != null )
-        {
-            ModelTransformer.transformQuadsTo( quads, m_overlayModel.getQuads( state, side, rand ), m_generalTransform );
+            ModelTransformer.transformQuadsTo( quads, m_overlayModel.getQuads( state, side, rand, EmptyModelData.INSTANCE ), m_generalTransform );
         }
         if( m_leftUpgradeModel != null )
         {
@@ -80,7 +83,7 @@ public class TurtleMultiModel implements IBakedModel
                 upgradeTransform = new Matrix4f( m_generalTransform );
                 upgradeTransform.mul( m_leftUpgradeTransform );
             }
-            ModelTransformer.transformQuadsTo( quads, m_leftUpgradeModel.getQuads( state, side, rand ), upgradeTransform );
+            ModelTransformer.transformQuadsTo( quads, m_leftUpgradeModel.getQuads( state, side, rand, EmptyModelData.INSTANCE ), upgradeTransform );
         }
         if( m_rightUpgradeModel != null )
         {
@@ -90,7 +93,7 @@ public class TurtleMultiModel implements IBakedModel
                 upgradeTransform = new Matrix4f( m_generalTransform );
                 upgradeTransform.mul( m_rightUpgradeTransform );
             }
-            ModelTransformer.transformQuadsTo( quads, m_rightUpgradeModel.getQuads( state, side, rand ), upgradeTransform );
+            ModelTransformer.transformQuadsTo( quads, m_rightUpgradeModel.getQuads( state, side, rand, EmptyModelData.INSTANCE ), upgradeTransform );
         }
         quads.trimToSize();
         return quads;
@@ -116,6 +119,7 @@ public class TurtleMultiModel implements IBakedModel
 
     @Nonnull
     @Override
+    @Deprecated
     public TextureAtlasSprite getParticleTexture()
     {
         return m_baseModel.getParticleTexture();
@@ -124,7 +128,7 @@ public class TurtleMultiModel implements IBakedModel
     @Nonnull
     @Override
     @Deprecated
-    public ItemCameraTransforms getItemCameraTransforms()
+    public net.minecraft.client.renderer.model.ItemCameraTransforms getItemCameraTransforms()
     {
         return m_baseModel.getItemCameraTransforms();
     }
@@ -133,6 +137,6 @@ public class TurtleMultiModel implements IBakedModel
     @Override
     public ItemOverrideList getOverrides()
     {
-        return ItemOverrideList.NONE;
+        return ItemOverrideList.EMPTY;
     }
 }