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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 committed by Aikar
parent 3e75d90810
commit 96feb68ad9
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GPG key ID: 401ADFC9891FAAFE
1 changed files with 33 additions and 12 deletions
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45
Spigot-Server-Patches/0542-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
@ -25,39 +29,56 @@ 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 f0284e81db3ab7c45018de2b446f2d8296df15c3..863bec74a6a0ee916b7db05687e588ae52eed4cd 100644
index f0284e81db3ab7c45018de2b446f2d8296df15c3..8444819f071b13e98ba07032520016a664b7b9bc 100644
--- a/src/main/java/com/destroystokyo/paper/PaperConfig.java
+++ b/src/main/java/com/destroystokyo/paper/PaperConfig.java
@@ -442,4 +442,8 @@ public class PaperConfig {
@@ -442,4 +442,9 @@ public class PaperConfig {
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
index b29525c40dc8e3ae747b8ddf5a3bd79b7cc0b792..32ff3f65cf9c2f9f4be1c1e78f5df555efe67b07 100644
index 39cd8ab5925ceb9494e0ac910c73338c24ecda2c..f90ac88d33fb6e83eb7bf1e1432df14e452387ec 100644
--- a/src/main/java/net/minecraft/server/BlockPiston.java
+++ b/src/main/java/net/minecraft/server/BlockPiston.java
@@ -364,11 +364,11 @@ public class BlockPiston extends BlockDirectional {
@@ -376,12 +376,24 @@ 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;
}
diff --git a/src/main/java/net/minecraft/server/TileEntityPiston.java b/src/main/java/net/minecraft/server/TileEntityPiston.java
index 489175abd8e582a3c082364fec357c4f061a22d7..634e37843097cdb08bab3a800565b42a58dce1d8 100644
index 489175abd8e582a3c082364fec357c4f061a22d7..d700e8281fe50b1c4131ac260ff6c0d0dd8412f0 100644
--- a/src/main/java/net/minecraft/server/TileEntityPiston.java
+++ b/src/main/java/net/minecraft/server/TileEntityPiston.java
@@ -275,7 +275,7 @@ public class TileEntityPiston extends TileEntity implements ITickable {
@ -65,7 +86,7 @@ index 489175abd8e582a3c082364fec357c4f061a22d7..634e37843097cdb08bab3a800565b42a
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)) {