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Code Issues Releases Wiki Activity

Fix conflicts with other mods replacing reach distance

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This commit is contained in:
Jonathan Coates 2023-07-08 09:35:06 +01:00
parent 8914b78816
commit df26cd267a
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GPG Key ID: B9E431FF07C98D06
1 changed files with 23 additions and 9 deletions
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projects/fabric/src/main/java/dan200/computercraft/mixin/ItemMixin.java
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@ -9,24 +9,38 @@ import net.minecraft.world.entity.player.Player;
import net.minecraft.world.item.Item;
import net.minecraft.world.level.ClipContext;
import net.minecraft.world.level.Level;
import net.minecraft.world.phys.BlockHitResult;
import org.spongepowered.asm.mixin.Mixin;
import org.spongepowered.asm.mixin.injection.Constant;
import org.spongepowered.asm.mixin.injection.ModifyConstant;
import org.spongepowered.asm.mixin.Unique;
import org.spongepowered.asm.mixin.injection.At;
import org.spongepowered.asm.mixin.injection.Inject;
import org.spongepowered.asm.mixin.injection.callback.CallbackInfoReturnable;
@Mixin(Item.class)
class ItemMixin {
/**
* Replace the reach distance in {@link Item#getPlayerPOVHitResult(Level, Player, ClipContext.Fluid)}.
*
* @param reach The original reach distance.
* @param level The current level.
* @param player The current player.
* @return The new reach distance.
* @param level The current level.
* @param player The current player.
* @param fluidMode The current clip-context fluid mode.
* @param cir Callback info to store the new reach distance.
* @see FakePlayer#getBlockReach()
*/
@ModifyConstant(method = "getPlayerPOVHitResult", constant = @Constant(doubleValue = 5))
@Inject(method = "getPlayerPOVHitResult", at = @At("HEAD"), cancellable = true)
@SuppressWarnings("UnusedMethod")
private static double getReachDistance(double reach, Level level, Player player) {
return player instanceof FakePlayer fp ? fp.getBlockReach() : reach;
private static void getReachDistance(Level level, Player player, ClipContext.Fluid fluidMode, CallbackInfoReturnable<BlockHitResult> cir) {
// It would theoretically be cleaner to use @ModifyConstant here, but as it's treated as a @Redirect, it doesn't
// compose with other mods. Instead, we replace the method when working with our fake player.
if (player instanceof FakePlayer fp) cir.setReturnValue(getHitResult(level, fp, fluidMode));
}
@Unique
private static BlockHitResult getHitResult(Level level, FakePlayer player, ClipContext.Fluid fluidMode) {
var start = player.getEyePosition();
var reach = player.getBlockReach();
var direction = player.getViewVector(1.0f);
var end = start.add(direction.x() * reach, direction.y() * reach, direction.z() * reach);
return level.clip(new ClipContext(start, end, ClipContext.Block.OUTLINE, fluidMode, player));
}
}