mirror of
https://github.com/PaperMC/Paper.git
synced 2024-11-27 01:29:32 +01:00
862299b6a6
* "Downgrade" Vineflower to 1.10.1 release The main thing we lose from the 1.11 snapshots is a recent fix for redundant casts. * Thanks intellij * a
80 lines
5.2 KiB
Diff
80 lines
5.2 KiB
Diff
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
|
|
From: Spottedleaf <Spottedleaf@users.noreply.github.com>
|
|
Date: Thu, 11 Jun 2020 17:29:42 -0700
|
|
Subject: [PATCH] Fix piston physics inconsistency - MC-188840
|
|
|
|
Pistons invoke physics when they move blocks. The physics can cause
|
|
tnt blocks to ignite. However, pistons (when storing the blocks they "moved")
|
|
don't actually go back to the world state sometimes to check if something
|
|
like that happened. As a result they end up moving the tnt like it was
|
|
never ignited. This resulted in the ability to create machines
|
|
that can duplicate tnt, called "world eaters".
|
|
This patch makes the piston logic retrieve the block state from the world
|
|
prevent this from occuring.
|
|
|
|
This patch also sets the moved pos to air immediately after creating
|
|
the moving piston TE. This prevents the block from being updated from
|
|
other physics calls by the piston.
|
|
|
|
Tested against the following tnt duper design:
|
|
https://www.youtube.com/watch?v=mS7xxNGhjxs
|
|
|
|
This patch also affects every type of machine that utilises
|
|
this mechanic. For example, dead coral is removed by a physics
|
|
update when being moved while it is attached to slimeblocks.
|
|
|
|
Standard piston machines that don't destroy or modify the
|
|
blocks they move by physics updates should be entirely
|
|
unaffected.
|
|
|
|
This patch fixes https://bugs.mojang.com/browse/MC-188840
|
|
|
|
This patch also fixes rail duping and carpet duping.
|
|
|
|
diff --git a/src/main/java/net/minecraft/world/level/block/piston/PistonBaseBlock.java b/src/main/java/net/minecraft/world/level/block/piston/PistonBaseBlock.java
|
|
index b3732a6246a2b011e36c5c35fa2ac7749e75db16..3ae61e7b50bfc440c597f88843f92903f8a66801 100644
|
|
--- a/src/main/java/net/minecraft/world/level/block/piston/PistonBaseBlock.java
|
|
+++ b/src/main/java/net/minecraft/world/level/block/piston/PistonBaseBlock.java
|
|
@@ -413,14 +413,26 @@ public class PistonBaseBlock extends DirectionalBlock {
|
|
}
|
|
|
|
for (j = list.size() - 1; j >= 0; --j) {
|
|
- blockposition3 = (BlockPos) list.get(j);
|
|
- iblockdata1 = world.getBlockState(blockposition3);
|
|
+ // Paper start - fix a variety of piston desync dupes
|
|
+ boolean allowDesync = io.papermc.paper.configuration.GlobalConfiguration.get().unsupportedSettings.allowPistonDuplication;
|
|
+ BlockPos oldPos = blockposition3 = (BlockPos) list.get(j);
|
|
+ iblockdata1 = allowDesync ? world.getBlockState(oldPos) : null;
|
|
+ // Paper end - fix a variety of piston desync dupes
|
|
blockposition3 = blockposition3.relative(enumdirection1);
|
|
map.remove(blockposition3);
|
|
BlockState iblockdata2 = (BlockState) Blocks.MOVING_PISTON.defaultBlockState().setValue(PistonBaseBlock.FACING, dir);
|
|
|
|
world.setBlock(blockposition3, iblockdata2, 68);
|
|
- world.setBlockEntity(MovingPistonBlock.newMovingBlockEntity(blockposition3, iblockdata2, (BlockState) list1.get(j), dir, retract, false));
|
|
+ // Paper start - fix a variety of piston desync dupes
|
|
+ if (!allowDesync) {
|
|
+ iblockdata1 = world.getBlockState(oldPos);
|
|
+ map.replace(oldPos, iblockdata1);
|
|
+ }
|
|
+ world.setBlockEntity(MovingPistonBlock.newMovingBlockEntity(blockposition3, iblockdata2, allowDesync ? list1.get(j) : iblockdata1, dir, retract, false));
|
|
+ if (!allowDesync) {
|
|
+ world.setBlock(oldPos, Blocks.AIR.defaultBlockState(), Block.UPDATE_CLIENTS | Block.UPDATE_KNOWN_SHAPE | Block.UPDATE_MOVE_BY_PISTON | 1024); // set air to prevent later physics updates from seeing this block
|
|
+ }
|
|
+ // Paper end - fix a variety of piston desync dupes
|
|
aiblockdata[i++] = iblockdata1;
|
|
}
|
|
|
|
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 541f4ffd06509aa72cf26ea108f84160eac82bc3..0e15da7cae105196d444b924b8e0db190583ba30 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
|
|
@@ -296,7 +296,7 @@ public class PistonMovingBlockEntity extends BlockEntity {
|
|
if (world.getBlockState(pos).is(Blocks.MOVING_PISTON)) {
|
|
BlockState blockState = Block.updateFromNeighbourShapes(blockEntity.movedState, world, pos);
|
|
if (blockState.isAir()) {
|
|
- world.setBlock(pos, blockEntity.movedState, 84);
|
|
+ world.setBlock(pos, blockEntity.movedState, io.papermc.paper.configuration.GlobalConfiguration.get().unsupportedSettings.allowPistonDuplication ? 84 : (84 | Block.UPDATE_CLIENTS)); // Paper - fix a variety of piston desync dupes; force notify (flag 2), it's possible the set type by the piston block (which doesn't notify) set this block to air
|
|
Block.updateOrDestroy(blockEntity.movedState, blockState, world, pos, 3);
|
|
} else {
|
|
if (blockState.hasProperty(BlockStateProperties.WATERLOGGED) && blockState.getValue(BlockStateProperties.WATERLOGGED)) {
|