mirror of
https://github.com/PaperMC/Paper.git
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1ab021ddca
Upstream has released updates that appears to apply and compile correctly.
This update has not been tested by PaperMC and as with ANY update, please do your own testing
Bukkit Changes:
565a5727 #533: Add consumed item, hand and consumeItem boolean to EntityShootBowEvent
CraftBukkit Changes:
927200a9 #718: Add consumed item, hand and consumeItem boolean to EntityShootBowEvent
94 lines
5.7 KiB
Diff
94 lines
5.7 KiB
Diff
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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From: Spottedleaf <Spottedleaf@users.noreply.github.com>
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Date: Thu, 11 Jun 2020 17:29:42 -0700
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Subject: [PATCH] Fix piston physics inconsistency - MC-188840
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Pistons invoke physics when they move blocks. The physics can cause
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tnt blocks to ignite. However, pistons (when storing the blocks they "moved")
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don't actually go back to the world state sometimes to check if something
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like that happened. As a result they end up moving the tnt like it was
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never ignited. This resulted in the ability to create machines
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that can duplicate tnt, called "world eaters".
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This patch makes the piston logic retrieve the block state from the world
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prevent this from occuring.
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This patch also sets the moved pos to air immediately after creating
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the moving piston TE. This prevents the block from being updated from
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other physics calls by the piston.
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Tested against the following tnt duper design:
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https://www.youtube.com/watch?v=mS7xxNGhjxs
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This patch also affects every type of machine that utilises
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this mechanic. For example, dead coral is removed by a physics
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update when being moved while it is attached to slimeblocks.
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Standard piston machines that don't destroy or modify the
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blocks they move by physics updates should be entirely
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unaffected.
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This patch fixes https://bugs.mojang.com/browse/MC-188840
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This patch also fixes rail duping and carpet duping.
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diff --git a/src/main/java/com/destroystokyo/paper/PaperConfig.java b/src/main/java/com/destroystokyo/paper/PaperConfig.java
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index f2f0b9f011bf5b5aa7d80c605cc885104bb934f8..56e4359ba32339e1bef58061585ff3e12e4215f3 100644
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--- a/src/main/java/com/destroystokyo/paper/PaperConfig.java
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+++ b/src/main/java/com/destroystokyo/paper/PaperConfig.java
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@@ -429,4 +429,10 @@ public class PaperConfig {
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consoleHasAllPermissions = getBoolean("settings.console-has-all-permissions", consoleHasAllPermissions);
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}
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+ public static boolean allowPistonDuplication;
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+ private static void allowPistonDuplication() {
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+ config.set("settings.unsupported-settings.allow-piston-duplication-readme", "This setting controls if player should be able to use TNT duplication, but this also allows duplicating carpet, rails and potentially other items");
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+ allowPistonDuplication = getBoolean("settings.unsupported-settings.allow-piston-duplication", config.getBoolean("settings.unsupported-settings.allow-tnt-duplication", false));
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+ set("settings.unsupported-settings.allow-tnt-duplication", null);
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+ }
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}
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diff --git a/src/main/java/net/minecraft/server/BlockPiston.java b/src/main/java/net/minecraft/server/BlockPiston.java
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index 0bab7dfb053c1aa92f5417c25fed5484e09bbec3..5d3bb5f393a1e0e4a2e8b9a466530a91279697a9 100644
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--- a/src/main/java/net/minecraft/server/BlockPiston.java
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+++ b/src/main/java/net/minecraft/server/BlockPiston.java
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@@ -370,12 +370,24 @@ public class BlockPiston extends BlockDirectional {
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}
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for (k = list.size() - 1; k >= 0; --k) {
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- blockposition3 = (BlockPosition) list.get(k);
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- iblockdata1 = world.getType(blockposition3);
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+ // Paper start - fix a variety of piston desync dupes
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+ boolean allowDesync = com.destroystokyo.paper.PaperConfig.allowPistonDuplication;
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+ BlockPosition oldPos = blockposition3 = (BlockPosition) list.get(k);
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+ iblockdata1 = allowDesync ? world.getType(oldPos) : null;
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+ // Paper end - fix a variety of piston desync dupes
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blockposition3 = blockposition3.shift(enumdirection1);
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map.remove(blockposition3);
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world.setTypeAndData(blockposition3, (IBlockData) Blocks.MOVING_PISTON.getBlockData().set(BlockPiston.FACING, enumdirection), 68);
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- world.setTileEntity(blockposition3, BlockPistonMoving.a((IBlockData) list1.get(k), enumdirection, flag, false));
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+ // Paper start - fix a variety of piston desync dupes
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+ if (!allowDesync) {
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+ iblockdata1 = world.getType(oldPos);
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+ map.replace(oldPos, iblockdata1);
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+ }
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+ world.setTileEntity(blockposition3, BlockPistonMoving.a(allowDesync ? list1.get(k) : iblockdata1, enumdirection, flag, false));
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+ if (!allowDesync) {
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+ world.setTypeAndData(oldPos, Blocks.AIR.getBlockData(), 2 | 4 | 16 | 1024); // set air to prevent later physics updates from seeing this block
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+ }
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+ // Paper end - fix a variety of piston desync dupes
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aiblockdata[j++] = iblockdata1;
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}
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diff --git a/src/main/java/net/minecraft/server/TileEntityPiston.java b/src/main/java/net/minecraft/server/TileEntityPiston.java
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index 8b2758377b70aaf7a9d21a28d4bbe16389f22403..7d86f0fe55063f6875db9c6f99f4f72ed4144536 100644
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--- a/src/main/java/net/minecraft/server/TileEntityPiston.java
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+++ b/src/main/java/net/minecraft/server/TileEntityPiston.java
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@@ -256,7 +256,7 @@ public class TileEntityPiston extends TileEntity implements ITickable {
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IBlockData iblockdata = Block.b(this.a, (GeneratorAccess) this.world, this.position);
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if (iblockdata.isAir()) {
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- this.world.setTypeAndData(this.position, this.a, 84);
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+ this.world.setTypeAndData(this.position, this.a, com.destroystokyo.paper.PaperConfig.allowPistonDuplication ? 84 : (84 | 2)); // Paper - force notify (flag 2), it's possible the set type by the piston block (which doesn't notify) set this block to air
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Block.a(this.a, iblockdata, this.world, this.position, 3);
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} else {
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if (iblockdata.b(BlockProperties.C) && (Boolean) iblockdata.get(BlockProperties.C)) {
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