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Fix carpet and rail duping by pistons under same TNT duping config

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This renames the config from enable tnt duping to enable piston duping

Normally we would not have a config for rails and carpet duping, but
the fix for TNT is the same fix for rails and carpet, so they are
having to be covered under that same config.
This commit is contained in:
Spottedleaf 2020-06-20 14:56:08 -04:00
parent 06cf33bf4f
commit 53b2b9f391
1 changed files with 28 additions and 7 deletions
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35
Spigot-Server-Patches/Fix-piston-physics-inconsistency-MC-188840.patch
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@ -12,6 +12,10 @@ 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
@ -25,6 +29,8 @@ 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/com/destroystokyo/paper/PaperConfig.java b/src/main/java/com/destroystokyo/paper/PaperConfig.java
index 0000000000000000000000000000000000000000..0000000000000000000000000000000000000000 100644
--- a/src/main/java/com/destroystokyo/paper/PaperConfig.java
@ -33,9 +39,10 @@ index 0000000000000000000000000000000000000000..00000000000000000000000000000000
consoleHasAllPermissions = getBoolean("settings.console-has-all-permissions", consoleHasAllPermissions);
}
+ public static boolean allowTntDuplication = false;
+ private static void allowTntDuplication() {
+ allowTntDuplication = getBoolean("settings.unsupported-settings.allow-tnt-duplication", allowTntDuplication);
+ public static boolean allowPistonDuplication;
+ private static void allowPistonDuplication() {
+ 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);
+ }
}
diff --git a/src/main/java/net/minecraft/server/BlockPiston.java b/src/main/java/net/minecraft/server/BlockPiston.java
@ -43,16 +50,30 @@ index 0000000000000000000000000000000000000000..00000000000000000000000000000000
--- a/src/main/java/net/minecraft/server/BlockPiston.java
+++ b/src/main/java/net/minecraft/server/BlockPiston.java
@@ -0,0 +0,0 @@ public class BlockPiston extends BlockDirectional {
}
for (k = list.size() - 1; k >= 0; --k) {
blockposition3 = (BlockPosition) list.get(k);
- blockposition3 = (BlockPosition) list.get(k);
- iblockdata1 = world.getType(blockposition3);
+ iblockdata1 = world.getType(blockposition3); if (!com.destroystokyo.paper.PaperConfig.allowTntDuplication) map.replace(blockposition3, iblockdata1); // Paper start - fix piston physics inconsistency
+ // Paper start - fix a variety of piston desync dupes
+ boolean allowDesync = com.destroystokyo.paper.PaperConfig.allowPistonDuplication;
+ BlockPosition oldPos = blockposition3 = (BlockPosition) list.get(k);
+ iblockdata1 = allowDesync ? world.getType(oldPos) : null;
+ // Paper end - fix a variety of piston desync dupes
blockposition3 = blockposition3.shift(enumdirection1);
map.remove(blockposition3);
world.setTypeAndData(blockposition3, (IBlockData) Blocks.MOVING_PISTON.getBlockData().set(BlockPiston.FACING, enumdirection), 68);
- world.setTileEntity(blockposition3, BlockPistonMoving.a((IBlockData) list1.get(k), enumdirection, flag, false));
+ world.setTileEntity(blockposition3, BlockPistonMoving.a(com.destroystokyo.paper.PaperConfig.allowTntDuplication ? list1.get(k) : iblockdata1, enumdirection, flag, false)); // Paper - fix piston physics inconsistency
+ // Paper start - fix a variety of piston desync dupes
+ if (!allowDesync) {
+ iblockdata1 = world.getType(oldPos);
+ map.replace(oldPos, iblockdata1);
+ }
+ world.setTileEntity(blockposition3, BlockPistonMoving.a(allowDesync ? list1.get(k) : iblockdata1, enumdirection, flag, false));
+ if (!allowDesync) {
+ world.setTypeAndData(oldPos, Blocks.AIR.getBlockData(), 4 | 16 | 1024); // set air to prevent later physics updates from seeing this block
+ }
+ // Paper end - fix a variety of piston desync dupes
--j;
aiblockdata[j] = iblockdata1;
}
@ -65,7 +86,7 @@ index 0000000000000000000000000000000000000000..00000000000000000000000000000000
if (iblockdata.isAir()) {
- this.world.setTypeAndData(this.position, this.a, 84);
+ this.world.setTypeAndData(this.position, this.a, 84 | (com.destroystokyo.paper.PaperConfig.allowTntDuplication ? 0 : 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
+ 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
Block.a(this.a, iblockdata, this.world, this.position, 3);
} else {
if (iblockdata.b((IBlockState) BlockProperties.C) && (Boolean) iblockdata.get(BlockProperties.C)) {