From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001 From: commandblockguy Date: Fri, 14 Aug 2020 14:44:14 -0500 Subject: [PATCH] Prevent headless pistons from being created Prevent headless pistons from being created by explosions or tree/mushroom growth. diff --git a/src/main/java/com/destroystokyo/paper/PaperConfig.java b/src/main/java/com/destroystokyo/paper/PaperConfig.java index 3a3874dc04e9b0ea3c3f0fda96dce8b3fed3199f..2678e4517570cbeafca7a9a4e54d4518cba75e69 100644 --- a/src/main/java/com/destroystokyo/paper/PaperConfig.java +++ b/src/main/java/com/destroystokyo/paper/PaperConfig.java @@ -441,6 +441,12 @@ public class PaperConfig { set("settings.unsupported-settings.allow-tnt-duplication", null); } + public static boolean allowHeadlessPistons; + private static void allowHeadlessPistons() { + config.set("settings.unsupported-settings.allow-headless-pistons-readme", "This setting controls if players should be able to create headless pistons."); + allowHeadlessPistons = getBoolean("settings.unsupported-settings.allow-headless-pistons", false); + } + public static int playerAutoSaveRate = -1; public static int maxPlayerAutoSavePerTick = 10; private static void playerAutoSaveRate() { diff --git a/src/main/java/net/minecraft/world/level/Explosion.java b/src/main/java/net/minecraft/world/level/Explosion.java index 1575fb0bbad6e11f25fb9ce51fd1f15a1b11e0fe..132140e00865fcf84ebe03ffcbc2f30ac11a0b35 100644 --- a/src/main/java/net/minecraft/world/level/Explosion.java +++ b/src/main/java/net/minecraft/world/level/Explosion.java @@ -15,6 +15,7 @@ import java.util.Random; import java.util.Set; import javax.annotation.Nullable; import net.minecraft.core.BlockPos; +import net.minecraft.core.Direction; import net.minecraft.core.Vec3i; import net.minecraft.core.particles.ParticleTypes; import net.minecraft.server.level.ServerLevel; @@ -35,6 +36,8 @@ import net.minecraft.world.level.block.BaseFireBlock; import net.minecraft.world.level.block.Block; import net.minecraft.world.level.block.Blocks; import net.minecraft.world.level.block.entity.BlockEntity; +import net.minecraft.world.level.block.piston.PistonHeadBlock; +import net.minecraft.world.level.block.piston.PistonMovingBlockEntity; import net.minecraft.world.level.block.state.BlockState; import net.minecraft.world.level.gameevent.GameEvent; import net.minecraft.world.level.material.FluidState; @@ -189,6 +192,15 @@ public class Explosion { if (f > 0.0F && this.damageCalculator.shouldBlockExplode(this, this.level, blockposition, iblockdata, f)) { set.add(blockposition); + // Paper start - prevent headless pistons from forming + if (!com.destroystokyo.paper.PaperConfig.allowHeadlessPistons && iblockdata.getBlock() == Blocks.MOVING_PISTON) { + BlockEntity extension = this.level.getBlockEntity(blockposition); + if (extension instanceof PistonMovingBlockEntity && ((PistonMovingBlockEntity) extension).isSourcePiston()) { + Direction direction = iblockdata.getValue(PistonHeadBlock.FACING); + set.add(blockposition.relative(direction.getOpposite())); + } + } + // Paper end } d4 += d0 * 0.30000001192092896D;