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 b67ba8f75e4a3358d7c2462918b85b0bf9b5a922..1ff9dbde24d6e15076c4e90a73ce5801c47ef3f2 100644 --- a/src/main/java/com/destroystokyo/paper/PaperConfig.java +++ b/src/main/java/com/destroystokyo/paper/PaperConfig.java @@ -440,4 +440,10 @@ public class PaperConfig { allowPistonDuplication = getBoolean("settings.unsupported-settings.allow-piston-duplication", config.getBoolean("settings.unsupported-settings.allow-tnt-duplication", false)); 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); + } } diff --git a/src/main/java/net/minecraft/world/level/Explosion.java b/src/main/java/net/minecraft/world/level/Explosion.java index a12af10e28f2d023ba6f916b5e7a53539416713f..822a8dbfaea0a312c4eb2849f2386ecd401b13e9 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) && blockposition.getY() < 256 && blockposition.getY() >= 0) { // CraftBukkit - don't wrap explosions 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).isHead()) { + Direction direction = iblockdata.getValue(PistonHeadBlock.FACING); + set.add(blockposition.relative(direction.getOpposite())); + } + } + // Paper end } d4 += d0 * 0.30000001192092896D; diff --git a/src/main/java/net/minecraft/world/level/block/piston/PistonMovingBlockEntity.java b/src/main/java/net/minecraft/world/level/block/piston/PistonMovingBlockEntity.java index 87bedba9ab495edcce289c6665271d92b7165944..985f1112963c3b644a88788a6b4f8a9bd5f5c11a 100644 --- a/src/main/java/net/minecraft/world/level/block/piston/PistonMovingBlockEntity.java +++ b/src/main/java/net/minecraft/world/level/block/piston/PistonMovingBlockEntity.java @@ -66,6 +66,8 @@ public class PistonMovingBlockEntity extends BlockEntity { return this.direction; } + public final boolean isHead() { return this.isSourcePiston(); } // Paper - OBFHELPER + public boolean isSourcePiston() { return this.isSourcePiston; }