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 933d3ace21f5a313f1d5e4dfd86777f6fa235f3f..1fd89294fabcd2a390ba7f1502acbfeb9a2343d6 100644 --- a/src/main/java/com/destroystokyo/paper/PaperConfig.java +++ b/src/main/java/com/destroystokyo/paper/PaperConfig.java @@ -469,4 +469,10 @@ public class PaperConfig { maxPlayerAutoSavePerTick = (playerAutoSaveRate == -1 || playerAutoSaveRate > 100) ? 10 : 20; } } + + 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); + } } diff --git a/src/main/java/net/minecraft/world/level/Explosion.java b/src/main/java/net/minecraft/world/level/Explosion.java index 8325ccbcae2a5ed55f436163bb8136cc03db9df0..97f99a06b8954b08af9f4156abe8abdad359349a 100644 --- a/src/main/java/net/minecraft/world/level/Explosion.java +++ b/src/main/java/net/minecraft/world/level/Explosion.java @@ -35,6 +35,8 @@ 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 +191,15 @@ 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()) { + net.minecraft.core.Direction direction = iblockdata.getValue(PistonHeadBlock.FACING); + set.add(blockposition.relative(direction.getOpposite())); + } + } + // Paper end } d4 += d0 * 0.30000001192092896D;