mirror of
https://github.com/SquidDev-CC/CC-Tweaked
synced 2024-06-25 22:53:22 +00:00
Limit turtle's reach distance in Item.use
When a turtle attempts to place a block, it does so by searching for nearby blocks and attempting to place the item against that block. This has slightly strange behaviour when working with "placable" non-block items though (such as buckets or boats). In this case, we call Item.use, which doesn't take in the position of the block we're placing against. Instead these items do their own ray trace, using the default reach distance. If the block we're trying to place against is non-solid, the ray trace will go straight through it and continue (up to the maximum of 5 blocks), allowing placing the item much further away. Our fix here is to override the default reach distance of our fake players, limiting it to 2. This is easy on Forge (it has built-in support), and requires a mixin on Fabric. Closes #1497.
This commit is contained in:
Jonathan Coates
parent
c3bdb0440e
commit
672c2cf029
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@ -0,0 +1,31 @@
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// SPDX-FileCopyrightText: 2023 The CC: Tweaked Developers
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//
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// SPDX-License-Identifier: MPL-2.0
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package dan200.computercraft.shared.platform;
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import com.mojang.authlib.GameProfile;
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import net.minecraft.core.BlockPos;
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import net.minecraft.core.Direction;
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import net.minecraft.server.level.ServerLevel;
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import net.minecraft.world.item.ItemStack;
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/**
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* Shared constants for {@linkplain PlatformHelper#createFakePlayer(ServerLevel, GameProfile) fake player}
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* implementations.
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*
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* @see net.minecraft.server.level.ServerPlayer
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* @see net.minecraft.world.entity.player.Player
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*/
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final class FakePlayerConstants {
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private FakePlayerConstants() {
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}
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/**
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* The maximum distance this player can reach.
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* <p>
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* This is used in the override of {@link net.minecraft.world.entity.player.Player#mayUseItemAt(BlockPos, Direction, ItemStack)},
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* to prevent the fake player reaching more than 2 blocks away.
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*/
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static final double MAX_REACH = 2;
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}
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@ -32,8 +32,10 @@
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import net.minecraft.world.item.Items
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import net.minecraft.world.level.block.Blocks
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import net.minecraft.world.level.block.FenceBlock
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import net.minecraft.world.level.block.state.properties.BlockStateProperties
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import org.hamcrest.MatcherAssert.assertThat
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import org.hamcrest.Matchers.*
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import org.hamcrest.Matchers.array
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import org.hamcrest.Matchers.instanceOf
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import org.junit.jupiter.api.Assertions.assertEquals
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import org.junit.jupiter.api.Assertions.assertNotEquals
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import java.util.*
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@ -78,6 +80,26 @@ fun Place_lava(helper: GameTestHelper) = helper.sequence {
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thenExecute { helper.assertBlockPresent(Blocks.LAVA, BlockPos(2, 2, 2)) }
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}
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/**
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* Checks that calling [net.minecraft.world.item.Item.use] will not place blocks too far away.
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*
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* This is caused by items using [net.minecraft.world.item.Item.getPlayerPOVHitResult] to perform a ray trace, which
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* ignores turtle's reduced reach distance.
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*
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* @see [#1497](https://github.com/cc-tweaked/CC-Tweaked/issues/1497)
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*/
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@GameTest
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fun Place_use_reach_limit(helper: GameTestHelper) = helper.sequence {
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thenOnComputer {
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turtle.placeDown(ObjectArguments()).await()
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.assertArrayEquals(true, message = "Placed water")
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}
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thenExecute {
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helper.assertBlockPresent(Blocks.AIR, BlockPos(2, 2, 2))
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helper.assertBlockHas(BlockPos(2, 5, 2), BlockStateProperties.WATERLOGGED, true)
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}
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}
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/**
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* Checks turtles can place when waterlogged.
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*
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139
projects/common/src/testMod/resources/data/cctest/structures/turtle_test.place_use_reach_limit.snbt
generated
Normal file
139
projects/common/src/testMod/resources/data/cctest/structures/turtle_test.place_use_reach_limit.snbt
generated
Normal file
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@ -0,0 +1,139 @@
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{
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DataVersion: 3337,
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size: [5, 5, 5],
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data: [
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{pos: [0, 0, 0], state: "minecraft:polished_andesite"},
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{pos: [0, 0, 1], state: "minecraft:polished_andesite"},
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{pos: [0, 0, 2], state: "minecraft:polished_andesite"},
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{pos: [0, 0, 3], state: "minecraft:polished_andesite"},
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{pos: [0, 0, 4], state: "minecraft:polished_andesite"},
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{pos: [1, 0, 0], state: "minecraft:polished_andesite"},
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{pos: [1, 0, 1], state: "minecraft:polished_andesite"},
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{pos: [1, 0, 2], state: "minecraft:polished_andesite"},
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{pos: [1, 0, 3], state: "minecraft:polished_andesite"},
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{pos: [1, 0, 4], state: "minecraft:polished_andesite"},
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{pos: [2, 0, 0], state: "minecraft:polished_andesite"},
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{pos: [2, 0, 1], state: "minecraft:polished_andesite"},
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{pos: [2, 0, 2], state: "minecraft:polished_andesite"},
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{pos: [2, 0, 3], state: "minecraft:polished_andesite"},
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{pos: [2, 0, 4], state: "minecraft:polished_andesite"},
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{pos: [3, 0, 0], state: "minecraft:polished_andesite"},
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{pos: [3, 0, 1], state: "minecraft:polished_andesite"},
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{pos: [3, 0, 2], state: "minecraft:polished_andesite"},
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{pos: [3, 0, 3], state: "minecraft:polished_andesite"},
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{pos: [3, 0, 4], state: "minecraft:polished_andesite"},
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{pos: [4, 0, 0], state: "minecraft:polished_andesite"},
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{pos: [4, 0, 1], state: "minecraft:polished_andesite"},
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{pos: [4, 0, 2], state: "minecraft:polished_andesite"},
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{pos: [4, 0, 3], state: "minecraft:polished_andesite"},
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{pos: [4, 0, 4], state: "minecraft:polished_andesite"},
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{pos: [0, 1, 0], state: "minecraft:air"},
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{pos: [0, 1, 1], state: "minecraft:air"},
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{pos: [0, 1, 2], state: "minecraft:air"},
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{pos: [0, 1, 3], state: "minecraft:air"},
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{pos: [0, 1, 4], state: "minecraft:air"},
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{pos: [1, 1, 0], state: "minecraft:air"},
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{pos: [1, 1, 1], state: "minecraft:air"},
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{pos: [1, 1, 2], state: "minecraft:light_gray_stained_glass"},
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{pos: [1, 1, 3], state: "minecraft:air"},
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{pos: [1, 1, 4], state: "minecraft:air"},
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{pos: [2, 1, 0], state: "minecraft:air"},
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{pos: [2, 1, 1], state: "minecraft:light_gray_stained_glass"},
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{pos: [2, 1, 2], state: "minecraft:air"},
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{pos: [2, 1, 3], state: "minecraft:light_gray_stained_glass"},
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{pos: [2, 1, 4], state: "minecraft:air"},
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{pos: [3, 1, 0], state: "minecraft:air"},
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{pos: [3, 1, 1], state: "minecraft:air"},
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{pos: [3, 1, 2], state: "minecraft:light_gray_stained_glass"},
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{pos: [3, 1, 3], state: "minecraft:air"},
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{pos: [3, 1, 4], state: "minecraft:air"},
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{pos: [4, 1, 0], state: "minecraft:air"},
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{pos: [4, 1, 1], state: "minecraft:air"},
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{pos: [4, 1, 2], state: "minecraft:air"},
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{pos: [4, 1, 3], state: "minecraft:air"},
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{pos: [4, 1, 4], state: "minecraft:air"},
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{pos: [0, 2, 0], state: "minecraft:air"},
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{pos: [0, 2, 1], state: "minecraft:air"},
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{pos: [0, 2, 2], state: "minecraft:air"},
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{pos: [0, 2, 3], state: "minecraft:air"},
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{pos: [0, 2, 4], state: "minecraft:air"},
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{pos: [1, 2, 0], state: "minecraft:air"},
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{pos: [1, 2, 1], state: "minecraft:air"},
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{pos: [1, 2, 2], state: "minecraft:air"},
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{pos: [1, 2, 3], state: "minecraft:air"},
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{pos: [1, 2, 4], state: "minecraft:air"},
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{pos: [2, 2, 0], state: "minecraft:air"},
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{pos: [2, 2, 1], state: "minecraft:air"},
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{pos: [2, 2, 2], state: "minecraft:ladder{facing:north,waterlogged:false}"},
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{pos: [2, 2, 3], state: "minecraft:light_gray_stained_glass"},
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{pos: [2, 2, 4], state: "minecraft:air"},
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{pos: [3, 2, 0], state: "minecraft:air"},
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{pos: [3, 2, 1], state: "minecraft:air"},
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{pos: [3, 2, 2], state: "minecraft:air"},
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{pos: [3, 2, 3], state: "minecraft:air"},
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{pos: [3, 2, 4], state: "minecraft:air"},
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{pos: [4, 2, 0], state: "minecraft:air"},
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{pos: [4, 2, 1], state: "minecraft:air"},
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{pos: [4, 2, 2], state: "minecraft:air"},
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{pos: [4, 2, 3], state: "minecraft:air"},
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{pos: [4, 2, 4], state: "minecraft:air"},
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{pos: [0, 3, 0], state: "minecraft:air"},
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{pos: [0, 3, 1], state: "minecraft:air"},
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{pos: [0, 3, 2], state: "minecraft:air"},
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{pos: [0, 3, 3], state: "minecraft:air"},
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{pos: [0, 3, 4], state: "minecraft:air"},
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{pos: [1, 3, 0], state: "minecraft:air"},
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{pos: [1, 3, 1], state: "minecraft:light_gray_stained_glass"},
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{pos: [1, 3, 2], state: "minecraft:light_gray_stained_glass"},
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{pos: [1, 3, 3], state: "minecraft:light_gray_stained_glass"},
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{pos: [1, 3, 4], state: "minecraft:air"},
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{pos: [2, 3, 0], state: "minecraft:air"},
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{pos: [2, 3, 1], state: "minecraft:light_gray_stained_glass"},
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{pos: [2, 3, 2], state: "minecraft:air"},
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{pos: [2, 3, 3], state: "minecraft:light_gray_stained_glass"},
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{pos: [2, 3, 4], state: "minecraft:air"},
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{pos: [3, 3, 0], state: "minecraft:air"},
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{pos: [3, 3, 1], state: "minecraft:light_gray_stained_glass"},
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{pos: [3, 3, 2], state: "minecraft:light_gray_stained_glass"},
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{pos: [3, 3, 3], state: "minecraft:light_gray_stained_glass"},
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{pos: [3, 3, 4], state: "minecraft:air"},
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{pos: [4, 3, 0], state: "minecraft:air"},
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{pos: [4, 3, 1], state: "minecraft:air"},
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{pos: [4, 3, 2], state: "minecraft:air"},
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{pos: [4, 3, 3], state: "minecraft:air"},
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{pos: [4, 3, 4], state: "minecraft:air"},
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{pos: [0, 4, 0], state: "minecraft:air"},
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{pos: [0, 4, 1], state: "minecraft:air"},
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{pos: [0, 4, 2], state: "minecraft:air"},
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{pos: [0, 4, 3], state: "minecraft:air"},
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{pos: [0, 4, 4], state: "minecraft:air"},
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{pos: [1, 4, 0], state: "minecraft:air"},
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{pos: [1, 4, 1], state: "minecraft:light_gray_stained_glass"},
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{pos: [1, 4, 2], state: "minecraft:light_gray_stained_glass"},
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{pos: [1, 4, 3], state: "minecraft:light_gray_stained_glass"},
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{pos: [1, 4, 4], state: "minecraft:air"},
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{pos: [2, 4, 0], state: "minecraft:air"},
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{pos: [2, 4, 1], state: "minecraft:light_gray_stained_glass"},
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{pos: [2, 4, 2], state: "computercraft:turtle_normal{facing:north,waterlogged:false}", nbt: {ComputerId: 1, Fuel: 0, Items: [{Count: 1b, Slot: 0b, id: "minecraft:water_bucket"}], Label: "turtle_test.place_use_reach_limit", On: 1b, Slot: 0, id: "computercraft:turtle_normal"}},
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{pos: [2, 4, 3], state: "minecraft:light_gray_stained_glass"},
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{pos: [2, 4, 4], state: "minecraft:air"},
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{pos: [3, 4, 0], state: "minecraft:air"},
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{pos: [3, 4, 1], state: "minecraft:light_gray_stained_glass"},
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{pos: [3, 4, 2], state: "minecraft:light_gray_stained_glass"},
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{pos: [3, 4, 3], state: "minecraft:light_gray_stained_glass"},
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{pos: [3, 4, 4], state: "minecraft:air"},
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{pos: [4, 4, 0], state: "minecraft:air"},
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{pos: [4, 4, 1], state: "minecraft:air"},
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{pos: [4, 4, 2], state: "minecraft:air"},
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{pos: [4, 4, 3], state: "minecraft:air"},
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{pos: [4, 4, 4], state: "minecraft:air"}
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],
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entities: [],
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palette: [
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"minecraft:polished_andesite",
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"minecraft:light_gray_stained_glass",
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"minecraft:air",
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"minecraft:ladder{facing:north,waterlogged:false}",
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"computercraft:turtle_normal{facing:north,waterlogged:false}"
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]
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}
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@ -0,0 +1,32 @@
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// SPDX-FileCopyrightText: 2023 The CC: Tweaked Developers
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//
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// SPDX-License-Identifier: MPL-2.0
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package dan200.computercraft.mixin;
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import dan200.computercraft.shared.platform.FakePlayer;
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import net.minecraft.world.entity.player.Player;
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import net.minecraft.world.item.Item;
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import net.minecraft.world.level.ClipContext;
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import net.minecraft.world.level.Level;
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import org.spongepowered.asm.mixin.Mixin;
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import org.spongepowered.asm.mixin.injection.Constant;
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import org.spongepowered.asm.mixin.injection.ModifyConstant;
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@Mixin(Item.class)
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class ItemMixin {
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/**
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* Replace the reach distance in {@link Item#getPlayerPOVHitResult(Level, Player, ClipContext.Fluid)}.
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*
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* @param reach The original reach distance.
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* @param level The current level.
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* @param player The current player.
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* @return The new reach distance.
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* @see FakePlayer#getBlockReach()
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*/
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@ModifyConstant(method = "getPlayerPOVHitResult", constant = @Constant(doubleValue = 5))
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@SuppressWarnings("UnusedMethod")
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private static double getReachDistance(double reach, Level level, Player player) {
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return player instanceof FakePlayer fp ? fp.getBlockReach() : reach;
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}
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}
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@ -11,7 +11,9 @@
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import net.minecraft.world.entity.Pose;
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import net.minecraft.world.entity.player.Player;
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final class FakePlayer extends net.fabricmc.fabric.api.entity.FakePlayer {
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import static dan200.computercraft.shared.platform.FakePlayerConstants.MAX_REACH;
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public final class FakePlayer extends net.fabricmc.fabric.api.entity.FakePlayer {
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private FakePlayer(ServerLevel serverLevel, GameProfile gameProfile) {
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super(serverLevel, gameProfile);
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}
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@ -33,4 +35,8 @@ public void die(DamageSource damageSource) {
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public float getStandingEyeHeight(Pose pose, EntityDimensions dimensions) {
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return 0;
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}
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public double getBlockReach() {
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return MAX_REACH;
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}
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}
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@ -12,6 +12,7 @@
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"EntityMixin",
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"ExplosionDamageCalculatorMixin",
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"ItemEntityMixin",
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"ItemMixin",
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"ServerLevelMixin",
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"ShapedRecipeMixin",
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"TagEntryAccessor",
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@ -16,6 +16,8 @@
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import javax.annotation.Nullable;
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import java.util.OptionalInt;
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import static dan200.computercraft.shared.platform.FakePlayerConstants.MAX_REACH;
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class FakePlayerExt extends FakePlayer {
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FakePlayerExt(ServerLevel serverLevel, GameProfile profile) {
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super(serverLevel, profile);
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@ -45,4 +47,14 @@ public boolean startRiding(Entity vehicle, boolean force) {
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public float getStandingEyeHeight(Pose pose, EntityDimensions dimensions) {
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return 0;
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}
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@Override
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public double getBlockReach() {
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return MAX_REACH;
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}
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@Override
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public double getEntityReach() {
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return MAX_REACH;
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}
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}
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Reference in New Issue
Block a user