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/net/minecraft/world/level/Explosion.java b/src/main/java/net/minecraft/world/level/Explosion.java index b7cf13fe4a0af243c0e76d75439b28d5018dadb9..6a6dd85da2832ba81643031a2e962daf5c27a697 100644 --- a/src/main/java/net/minecraft/world/level/Explosion.java +++ b/src/main/java/net/minecraft/world/level/Explosion.java @@ -206,6 +206,15 @@ 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 (!io.papermc.paper.configuration.GlobalConfiguration.get().unsupportedSettings.allowHeadlessPistons && iblockdata.getBlock() == Blocks.MOVING_PISTON) { + net.minecraft.world.level.block.entity.BlockEntity extension = this.level.getBlockEntity(blockposition); + if (extension instanceof net.minecraft.world.level.block.piston.PistonMovingBlockEntity blockEntity && blockEntity.isSourcePiston()) { + net.minecraft.core.Direction direction = iblockdata.getValue(net.minecraft.world.level.block.piston.PistonHeadBlock.FACING); + set.add(blockposition.relative(direction.getOpposite())); + } + } + // Paper end - prevent headless pistons from forming } d4 += d0 * 0.30000001192092896D;