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 d86474a1a97597c14ea8a28444e2a5d82fcda2a7..e0422471776f34b8e3c753d855aa06f00cc049ec 100644 --- a/src/main/java/com/destroystokyo/paper/PaperConfig.java +++ b/src/main/java/com/destroystokyo/paper/PaperConfig.java @@ -436,6 +436,12 @@ 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/server/Explosion.java b/src/main/java/net/minecraft/server/Explosion.java index 72de544c0782e4daff222a0ca04e5bc870cf148c..5ca4d03215c979a4d122a32178a1859b4d9c3334 100644 --- a/src/main/java/net/minecraft/server/Explosion.java +++ b/src/main/java/net/minecraft/server/Explosion.java @@ -135,6 +135,15 @@ public class Explosion { if (f > 0.0F && this.l.a(this, this.world, 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) { + TileEntity extension = this.world.getTileEntity(blockposition); + if (extension instanceof TileEntityPiston && ((TileEntityPiston) extension).isHead()) { + EnumDirection direction = iblockdata.get(BlockPistonExtension.FACING); + set.add(blockposition.shift(direction.opposite())); + } + } + // Paper end } d4 += d0 * 0.30000001192092896D; diff --git a/src/main/java/net/minecraft/server/TileEntityPiston.java b/src/main/java/net/minecraft/server/TileEntityPiston.java index 7d86f0fe55063f6875db9c6f99f4f72ed4144536..b0d52d7405ca24938ca753897f89e6fad575d04d 100644 --- a/src/main/java/net/minecraft/server/TileEntityPiston.java +++ b/src/main/java/net/minecraft/server/TileEntityPiston.java @@ -42,6 +42,8 @@ public class TileEntityPiston extends TileEntity implements ITickable { return this.b; } + public final boolean isHead() { return this.h(); } // Paper - OBFHELPER + public boolean h() { return this.g; }