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Code Issues Releases Activity

Fix floating point issue on legacy physics versions pre-1.17

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Samsuik
2023-11-23 15:59:22 +00:00
parent be2aa6f947
commit 1a67430b39
1 changed files with 24 additions and 6 deletions
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30
patches/server/0040-Configure-cannon-physics-by-version.patch
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@@ -217,7 +217,7 @@ index 50259042ebafe520342bdb1a4b7e6b9138b8acbd..adf8be12b754c3d9b16ef4a7c675dd2c
if (this.level().hasChunksAt(blockposition, blockposition1)) {
BlockPos.MutableBlockPos blockposition_mutableblockposition = new BlockPos.MutableBlockPos();
diff --git a/src/main/java/net/minecraft/world/entity/item/FallingBlockEntity.java b/src/main/java/net/minecraft/world/entity/item/FallingBlockEntity.java
index bf52aafe542ca735181e461d1f9cbc39b8d88220..80168d32a95bd960e781751fcf05ff591276e991 100644
index bf52aafe542ca735181e461d1f9cbc39b8d88220..87ef8f4953c7d9fddfc9ddbdb027e76145b645c8 100644
--- a/src/main/java/net/minecraft/world/entity/item/FallingBlockEntity.java
+++ b/src/main/java/net/minecraft/world/entity/item/FallingBlockEntity.java
@@ -89,6 +89,8 @@ public class FallingBlockEntity extends Entity {
@@ -242,7 +242,7 @@ index bf52aafe542ca735181e461d1f9cbc39b8d88220..80168d32a95bd960e781751fcf05ff59
world.addFreshEntity(entityfallingblock, spawnReason); // CraftBukkit
return entityfallingblock;
}
@@ -188,7 +194,37 @@ public class FallingBlockEntity extends Entity {
@@ -188,7 +194,43 @@ public class FallingBlockEntity extends Entity {
// Sakura start
@Override
public final double getEyeY() {
@@ -261,6 +261,12 @@ index bf52aafe542ca735181e461d1f9cbc39b8d88220..80168d32a95bd960e781751fcf05ff59
+ return x * x + y * y + z * z;
+ }
+
+ private BlockPos patchedBlockPosition() {
+ // mitigate the floating point issue for sand breaking below y-0
+ // 1.0e-12 allows tech that uses indirect collision clipping to still function
+ return BlockPos.containing(this.getX(), this.getY() + 1.0e-12, this.getZ());
+ }
+
+ private void removeBlockOnFall(Block block) {
+ BlockPos blockposition = this.blockPosition();
+ // Paper start - fix cancelling block falling causing client desync
@@ -281,7 +287,7 @@ index bf52aafe542ca735181e461d1f9cbc39b8d88220..80168d32a95bd960e781751fcf05ff59
}
// Sakura end
@@ -204,9 +240,16 @@ public class FallingBlockEntity extends Entity {
@@ -204,9 +246,16 @@ public class FallingBlockEntity extends Entity {
} else {
Block block = this.blockState.getBlock();
@@ -299,7 +305,7 @@ index bf52aafe542ca735181e461d1f9cbc39b8d88220..80168d32a95bd960e781751fcf05ff59
}
this.moveBasic(MoverType.SELF, this.getDeltaMovement()); // Sakura
@@ -227,6 +270,11 @@ public class FallingBlockEntity extends Entity {
@@ -227,8 +276,23 @@ public class FallingBlockEntity extends Entity {
return;
}
// Paper end
@@ -310,8 +316,20 @@ index bf52aafe542ca735181e461d1f9cbc39b8d88220..80168d32a95bd960e781751fcf05ff59
+ // Sakura end
if (!this.level().isClientSide) {
BlockPos blockposition = this.blockPosition();
+
+ // Sakura start
+ // Patching this on modern versions can break some cannons that utilise
+ // the floating point issue. But it makes sense on legacy versions where
+ // that is seemingly not an issue.
+ if (this.physics.before(1_17_0)) {
+ blockposition = this.patchedBlockPosition();
+ }
+ // Sakura end
+
boolean flag = this.blockState.getBlock() instanceof ConcretePowderBlock;
@@ -253,7 +301,20 @@ public class FallingBlockEntity extends Entity {
boolean flag1 = flag && this.level().getFluidState(blockposition).is(FluidTags.WATER);
double d0 = this.getDeltaMovement().lengthSqr();
@@ -253,7 +317,20 @@ public class FallingBlockEntity extends Entity {
} else {
BlockState iblockdata = this.level().getBlockState(blockposition);
@@ -333,7 +351,7 @@ index bf52aafe542ca735181e461d1f9cbc39b8d88220..80168d32a95bd960e781751fcf05ff59
if (!iblockdata.is(Blocks.MOVING_PISTON)) {
if (!this.cancelDrop) {
boolean flag2 = iblockdata.canBeReplaced((BlockPlaceContext) (new DirectionalPlaceContext(this.level(), blockposition, Direction.DOWN, ItemStack.EMPTY, Direction.UP)));
@@ -321,7 +382,12 @@ public class FallingBlockEntity extends Entity {
@@ -321,7 +398,12 @@ public class FallingBlockEntity extends Entity {
}
}