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Paper/patches/server/0920-Add-FluidState-API.patch
Spottedleaf 8c5b837e05 Rework async chunk api implementation
Firstly, the old methods all routed to the CompletableFuture method.
However, the CF method could not guarantee that if the caller
was off-main that the future would be "completed" on-main. Since
the callback methods used the CF one, this meant that the callback
methods did not guarantee that the callbacks were to be called on
the main thread.

Now, all methods route to getChunkAtAsync(x, z, gen, urgent, cb)
so that the methods with the callback are guaranteed to invoke
the callback on the main thread. The CF behavior remains unchanged;
it may still appear to complete on main if invoked off-main.

Secondly, remove the scheduleOnMain invocation in the async
chunk completion. This unnecessarily delays the callback
by 1 tick.

Thirdly, add getChunksAtAsync(minX, minZ, maxX, maxZ, ...) which
will load chunks within an area. This method is provided as a helper
as keeping all chunks loaded within an area can be complicated to
implement for plugins (due to the lacking ticket API), and is
already implemented internally anyways.

Fourthly, remove the ticket addition that occured with getChunkAt
and getChunkAtAsync. The ticket addition may delay the unloading
of the chunk unnecessarily. It also fixes a very rare timing bug
where the future/callback would be completed after the chunk
unloads.
2024-11-18 23:00:59 -08:00

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8.4 KiB
Diff

From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: vicisacat <victor.branchu@gmail.com>
Date: Fri, 17 Nov 2023 20:22:43 +0100
Subject: [PATCH] Add FluidState API
diff --git a/src/main/java/io/papermc/paper/block/fluid/PaperFluidData.java b/src/main/java/io/papermc/paper/block/fluid/PaperFluidData.java
new file mode 100644
index 0000000000000000000000000000000000000000..479bc32241ebadf8bbc1080b601f61391ad37fa4
--- /dev/null
+++ b/src/main/java/io/papermc/paper/block/fluid/PaperFluidData.java
@@ -0,0 +1,110 @@
+package io.papermc.paper.block.fluid;
+
+import com.google.common.base.Preconditions;
+import io.papermc.paper.block.fluid.type.PaperFallingFluidData;
+import io.papermc.paper.block.fluid.type.PaperFlowingFluidData;
+import io.papermc.paper.util.MCUtil;
+import java.util.HashMap;
+import java.util.Map;
+import java.util.function.Function;
+import net.minecraft.world.level.material.FluidState;
+import net.minecraft.world.level.material.LavaFluid;
+import net.minecraft.world.level.material.WaterFluid;
+import org.bukkit.Fluid;
+import org.bukkit.Location;
+import org.bukkit.craftbukkit.CraftFluid;
+import org.bukkit.craftbukkit.CraftWorld;
+import org.bukkit.craftbukkit.util.CraftVector;
+import org.bukkit.util.Vector;
+import org.jetbrains.annotations.NotNull;
+
+public class PaperFluidData implements FluidData {
+
+ private final FluidState state;
+
+ protected PaperFluidData(final FluidState state) {
+ this.state = state;
+ }
+
+ /**
+ * Provides the internal server representation of this fluid data.
+ * @return the fluid state.
+ */
+ public FluidState getState() {
+ return this.state;
+ }
+
+ @Override
+ public final @NotNull Fluid getFluidType() {
+ return CraftFluid.minecraftToBukkit(this.state.getType());
+ }
+
+ @Override
+ public @NotNull PaperFluidData clone() {
+ try {
+ return (PaperFluidData) super.clone();
+ } catch (final CloneNotSupportedException ex) {
+ throw new AssertionError("Clone not supported", ex);
+ }
+ }
+
+ @Override
+ public @NotNull Vector computeFlowDirection(final Location location) {
+ Preconditions.checkArgument(location.getWorld() != null, "Cannot compute flow direction on world-less location");
+ return CraftVector.toBukkit(this.state.getFlow(
+ ((CraftWorld) location.getWorld()).getHandle(),
+ MCUtil.toBlockPosition(location)
+ ));
+ }
+
+ @Override
+ public int getLevel() {
+ return this.state.getAmount();
+ }
+
+ @Override
+ public float computeHeight(@NotNull final Location location) {
+ Preconditions.checkArgument(location.getWorld() != null, "Cannot compute height on world-less location");
+ return this.state.getHeight(((CraftWorld) location.getWorld()).getHandle(), MCUtil.toBlockPos(location));
+ }
+
+ @Override
+ public boolean isSource() {
+ return this.state.isSource();
+ }
+
+ @Override
+ public int hashCode() {
+ return this.state.hashCode();
+ }
+
+ @Override
+ public boolean equals(final Object obj) {
+ return obj instanceof final PaperFluidData paperFluidData && this.state.equals(paperFluidData.state);
+ }
+
+ @Override
+ public String toString() {
+ return "PaperFluidData{" + this.state + "}";
+ }
+
+ /* Registry */
+ private static final Map<Class<? extends net.minecraft.world.level.material.Fluid>, Function<FluidState, PaperFluidData>> MAP = new HashMap<>();
+ static {
+ //<editor-fold desc="PaperFluidData Registration" defaultstate="collapsed">
+ register(LavaFluid.Source.class, PaperFallingFluidData::new);
+ register(WaterFluid.Source.class, PaperFallingFluidData::new);
+ register(LavaFluid.Flowing.class, PaperFlowingFluidData::new);
+ register(WaterFluid.Flowing.class, PaperFlowingFluidData::new);
+ //</editor-fold>
+ }
+
+ static void register(final Class<? extends net.minecraft.world.level.material.Fluid> fluid, final Function<FluidState, PaperFluidData> creator) {
+ Preconditions.checkState(MAP.put(fluid, creator) == null, "Duplicate mapping %s->%s", fluid, creator);
+ MAP.put(fluid, creator);
+ }
+
+ public static PaperFluidData createData(final FluidState state) {
+ return MAP.getOrDefault(state.getType().getClass(), PaperFluidData::new).apply(state);
+ }
+}
diff --git a/src/main/java/io/papermc/paper/block/fluid/package-info.java b/src/main/java/io/papermc/paper/block/fluid/package-info.java
new file mode 100644
index 0000000000000000000000000000000000000000..cfabb814ebd281aab299c6c655266ff357e08806
--- /dev/null
+++ b/src/main/java/io/papermc/paper/block/fluid/package-info.java
@@ -0,0 +1,5 @@
+@DefaultQualifier(NonNull.class)
+package io.papermc.paper.block.fluid;
+
+import org.checkerframework.checker.nullness.qual.NonNull;
+import org.checkerframework.framework.qual.DefaultQualifier;
diff --git a/src/main/java/io/papermc/paper/block/fluid/type/PaperFallingFluidData.java b/src/main/java/io/papermc/paper/block/fluid/type/PaperFallingFluidData.java
new file mode 100644
index 0000000000000000000000000000000000000000..655dbd83ff4e632f1168b75e9b402b05aa9d8edf
--- /dev/null
+++ b/src/main/java/io/papermc/paper/block/fluid/type/PaperFallingFluidData.java
@@ -0,0 +1,18 @@
+
+package io.papermc.paper.block.fluid.type;
+
+import io.papermc.paper.block.fluid.PaperFluidData;
+import net.minecraft.world.level.material.FlowingFluid;
+import net.minecraft.world.level.material.FluidState;
+
+public class PaperFallingFluidData extends PaperFluidData implements FallingFluidData {
+
+ public PaperFallingFluidData(final FluidState state) {
+ super(state);
+ }
+
+ @Override
+ public boolean isFalling() {
+ return this.getState().getValue(FlowingFluid.FALLING);
+ }
+}
diff --git a/src/main/java/io/papermc/paper/block/fluid/type/PaperFlowingFluidData.java b/src/main/java/io/papermc/paper/block/fluid/type/PaperFlowingFluidData.java
new file mode 100644
index 0000000000000000000000000000000000000000..c0c2805cb045cdd835b402776a6923fe2ecc2a99
--- /dev/null
+++ b/src/main/java/io/papermc/paper/block/fluid/type/PaperFlowingFluidData.java
@@ -0,0 +1,11 @@
+package io.papermc.paper.block.fluid.type;
+
+import net.minecraft.world.level.material.FluidState;
+
+public class PaperFlowingFluidData extends PaperFallingFluidData implements FlowingFluidData {
+
+ public PaperFlowingFluidData(final FluidState state) {
+ super(state);
+ }
+
+}
diff --git a/src/main/java/org/bukkit/craftbukkit/CraftRegionAccessor.java b/src/main/java/org/bukkit/craftbukkit/CraftRegionAccessor.java
index 4c234e887c42b27754ed8f05f2000d9309274427..f0bd7d01f56bb792886354ca4f199e46c2cf7503 100644
--- a/src/main/java/org/bukkit/craftbukkit/CraftRegionAccessor.java
+++ b/src/main/java/org/bukkit/craftbukkit/CraftRegionAccessor.java
@@ -108,6 +108,13 @@ public abstract class CraftRegionAccessor implements RegionAccessor {
return CraftBlock.at(this.getHandle(), new BlockPos(x, y, z)).getState();
}
+ // Paper start - FluidState API
+ @Override
+ public io.papermc.paper.block.fluid.FluidData getFluidData(final int x, final int y, final int z) {
+ return io.papermc.paper.block.fluid.PaperFluidData.createData(getHandle().getFluidState(new BlockPos(x, y, z)));
+ }
+ // Paper end
+
@Override
public BlockData getBlockData(Location location) {
return this.getBlockData(location.getBlockX(), location.getBlockY(), location.getBlockZ());
diff --git a/src/main/java/org/bukkit/craftbukkit/generator/CraftLimitedRegion.java b/src/main/java/org/bukkit/craftbukkit/generator/CraftLimitedRegion.java
index a23269e3bdb83f85a1d08d5f7b54742025223ada..a57ac9dc8d08b12ec00ad41d9a1779e5a81e4e8b 100644
--- a/src/main/java/org/bukkit/craftbukkit/generator/CraftLimitedRegion.java
+++ b/src/main/java/org/bukkit/craftbukkit/generator/CraftLimitedRegion.java
@@ -304,4 +304,11 @@ public class CraftLimitedRegion extends CraftRegionAccessor implements LimitedRe
return centerChunkZ;
}
// Paper end - Add more LimitedRegion API
+ // Paper start - Fluid API
+ @Override
+ public io.papermc.paper.block.fluid.FluidData getFluidData(int x, int y, int z) {
+ Preconditions.checkArgument(this.isInRegion(x, y, z), "Coordinates %s, %s, %s are not in the region", x, y, z);
+ return super.getFluidData(x, y, z);
+ }
+ // Paper end
}