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9ec82c34eaea892325c6ec9fceeb89797bdebff7
SakuraMC/patches/server/0017-Replace-explosion-density-cache.patch
Samsuik 9ec82c34ea Begin backporting to 1.18.2
2025-03-14 18:45:24 +00:00

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From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Samsuik <kfian294ma4@gmail.com>
Date: Mon, 22 Apr 2024 23:01:26 +0100
Subject: [PATCH] Replace explosion density cache
diff --git a/src/main/java/me/samsuik/sakura/explosion/density/BlockDensityCache.java b/src/main/java/me/samsuik/sakura/explosion/density/BlockDensityCache.java
new file mode 100644
index 0000000000000000000000000000000000000000..b760b03f9ddc1fb2aed135105030fc1b5dc2c9c9
--- /dev/null
+++ b/src/main/java/me/samsuik/sakura/explosion/density/BlockDensityCache.java
@@ -0,0 +1,65 @@
+package me.samsuik.sakura.explosion.density;
+
+import it.unimi.dsi.fastutil.ints.Int2ObjectOpenHashMap;
+import net.minecraft.util.Mth;
+import net.minecraft.world.entity.Entity;
+import net.minecraft.world.phys.Vec3;
+
+/**
+ * This is a replacement for papers explosion density cache to be more lenient and efficient.
+ */
+public final class BlockDensityCache {
+ public static final float UNKNOWN_DENSITY = -1.0f;
+
+ private final Int2ObjectOpenHashMap<DensityData> densityDataMap = new Int2ObjectOpenHashMap<>();
+ private DensityData data;
+ private int key;
+ private boolean knownSource;
+
+ public float getDensity(Vec3 explosion, Entity entity) {
+ int key = getKey(explosion, entity);
+ DensityData data = this.densityDataMap.get(key);
+
+ if (data != null && data.hasPosition(explosion, entity.getBoundingBox())) {
+ return data.density();
+ } else {
+ this.knownSource = data != null && data.complete() && data.isExplosionPosition(explosion);
+ this.data = data;
+ this.key = key;
+ return UNKNOWN_DENSITY;
+ }
+ }
+
+ public float getKnownDensity(Vec3 point) {
+ if (this.knownSource && this.data.isKnownPosition(point)) {
+ return this.data.density();
+ } else {
+ return UNKNOWN_DENSITY;
+ }
+ }
+
+ public void putDensity(Vec3 explosion, Entity entity, float density) {
+ if (this.data == null || !this.data.complete()) {
+ this.densityDataMap.put(this.key, new DensityData(explosion, entity, density));
+ } else if (this.data.density() == density) {
+ this.data.expand(explosion, entity);
+ }
+ }
+
+ public void clear(long tick) {
+ // trim size every 30 seconds
+ if (tick != -1 && tick % 600 == 0)
+ this.densityDataMap.trim();
+ this.densityDataMap.clear();
+ }
+
+ private static int getKey(Vec3 explosion, Entity entity) {
+ int key = Mth.floor(explosion.x());
+ key = 31 * key + Mth.floor(explosion.y());
+ key = 31 * key + Mth.floor(explosion.z());
+ key = 31 * key + entity.getBlockX();
+ key = 31 * key + entity.getBlockY();
+ key = 31 * key + entity.getBlockZ();
+ return key;
+ }
+}
diff --git a/src/main/java/me/samsuik/sakura/explosion/density/DensityData.java b/src/main/java/me/samsuik/sakura/explosion/density/DensityData.java
new file mode 100644
index 0000000000000000000000000000000000000000..d7e24638f07f243502004970ab4ce646cbe1e436
--- /dev/null
+++ b/src/main/java/me/samsuik/sakura/explosion/density/DensityData.java
@@ -0,0 +1,47 @@
+package me.samsuik.sakura.explosion.density;
+
+import net.minecraft.world.entity.Entity;
+import net.minecraft.world.phys.AABB;
+import net.minecraft.world.phys.Vec3;
+
+public final class DensityData {
+ private AABB source;
+ private AABB known;
+ private AABB entity;
+ private final float density;
+ private final boolean complete;
+
+ public DensityData(Vec3 explosion, Entity entity, float density) {
+ this.source = new AABB(explosion, explosion);
+ this.known = new AABB(entity.position(), entity.position());
+ this.entity = entity.getBoundingBox();
+ this.density = density;
+ this.complete = Math.abs(density - 0.5f) == 0.5f;
+ }
+
+ public float density() {
+ return this.density;
+ }
+
+ public boolean complete() {
+ return this.complete;
+ }
+
+ public boolean hasPosition(Vec3 explosion, AABB entity) {
+ return this.isExplosionPosition(explosion) && this.entity.isAABBInBounds(entity);
+ }
+
+ public boolean isKnownPosition(Vec3 point) {
+ return this.entity.isVec3InBounds(point);
+ }
+
+ public boolean isExplosionPosition(Vec3 explosion) {
+ return this.source.isVec3InBounds(explosion);
+ }
+
+ public void expand(Vec3 explosion, Entity entity) {
+ this.source = this.source.expand(explosion);
+ this.known = this.known.expand(entity.position());
+ this.entity = this.entity.minmax(entity.getBoundingBox());
+ }
+}
diff --git a/src/main/java/net/minecraft/server/MinecraftServer.java b/src/main/java/net/minecraft/server/MinecraftServer.java
index 536dd6fd0317779e04f133d2ae32a251da9e4394..532abec1030f28df6ee0629ca3aef2766311bd99 100644
--- a/src/main/java/net/minecraft/server/MinecraftServer.java
+++ b/src/main/java/net/minecraft/server/MinecraftServer.java
@@ -1621,6 +1621,7 @@ public abstract class MinecraftServer extends ReentrantBlockableEventLoop<TickTa
worldserver.localConfig().expire(currentTickLong); // Sakura
worldserver.minimalTNT.clear(); // Sakura - visibility api
worldserver.mergeHistory.expire(currentTickLong); // Sakura - merge cannoning entities
+ worldserver.densityCache.clear(currentTickLong); // Sakura - explosion density cache
}
this.isIteratingOverLevels = false; // Paper
diff --git a/src/main/java/net/minecraft/world/level/Explosion.java b/src/main/java/net/minecraft/world/level/Explosion.java
index 2301773137d004b1fbfa030caea6a4f436d1beae..8ef317a79db184db69b2a699c280b5c7c2663259 100644
--- a/src/main/java/net/minecraft/world/level/Explosion.java
+++ b/src/main/java/net/minecraft/world/level/Explosion.java
@@ -317,7 +317,16 @@ public class Explosion {
double d10 = Mth.lerp(d7, axisalignedbb.minZ, axisalignedbb.maxZ);
Vec3 vec3d1 = new Vec3(d8 + d3, d9, d10 + d4);
- if (entity.level.clip(new ClipContext(vec3d1, source, ClipContext.Block.COLLIDER, ClipContext.Fluid.NONE, entity)).getType() == HitResult.Type.MISS) {
+ // Sakura start - replace density cache
+ final net.minecraft.world.phys.HitResult.Type hitResult;
+ final float density = entity.level.densityCache.getKnownDensity(vec3d1);
+ if (density != me.samsuik.sakura.explosion.density.BlockDensityCache.UNKNOWN_DENSITY) {
+ hitResult = density != 0.0f ? net.minecraft.world.phys.HitResult.Type.MISS : net.minecraft.world.phys.HitResult.Type.BLOCK;
+ } else {
+ hitResult = entity.level.clip(new ClipContext(vec3d1, source, ClipContext.Block.COLLIDER, ClipContext.Fluid.NONE, entity)).getType();
+ }
+ if (hitResult == HitResult.Type.MISS) {
+ // Sakura end - replace density cache
++i;
}
@@ -504,6 +513,11 @@ public class Explosion {
return;
}
// CraftBukkit end
+ // Sakura start - explosion density cache
+ if (!this.toBlow.isEmpty() && !this.level.paperConfig.optimizeExplosions) {
+ this.level.densityCache.clear(-1);
+ }
+ // Sakura end - explosion density cache
iterator = this.toBlow.iterator();
while (iterator.hasNext()) {
@@ -627,14 +641,12 @@ public class Explosion {
}
// Paper start - Optimize explosions
private float getBlockDensity(Vec3 vec3d, Entity entity) {
- if (!this.level.paperConfig.optimizeExplosions) {
- return getSeenPercent(vec3d, entity);
- }
- CacheKey key = new CacheKey(this, entity.getBoundingBox());
- Float blockDensity = this.level.explosionDensityCache.get(key);
- if (blockDensity == null) {
+ // Sakura start - replace density cache
+ float blockDensity = this.level.densityCache.getDensity(vec3d, entity);
+ if (blockDensity == me.samsuik.sakura.explosion.density.BlockDensityCache.UNKNOWN_DENSITY) {
blockDensity = getSeenPercent(vec3d, entity);
- this.level.explosionDensityCache.put(key, blockDensity);
+ this.level.densityCache.putDensity(vec3d, entity, blockDensity);
+ // Sakura end - replace density cache
}
return blockDensity;
diff --git a/src/main/java/net/minecraft/world/level/Level.java b/src/main/java/net/minecraft/world/level/Level.java
index 894d920305302127b5cf9ee2bfba239475e76144..b7407df002b7addf854a321f62c26003f7fdc86b 100644
--- a/src/main/java/net/minecraft/world/level/Level.java
+++ b/src/main/java/net/minecraft/world/level/Level.java
@@ -267,6 +267,7 @@ public abstract class Level implements LevelAccessor, AutoCloseable {
// Sakura end
public final it.unimi.dsi.fastutil.longs.Long2IntMap minimalTNT = new it.unimi.dsi.fastutil.longs.Long2IntOpenHashMap(); // Sakura - visibility api
public final me.samsuik.sakura.entity.merge.MergeHistory mergeHistory = new me.samsuik.sakura.entity.merge.MergeHistory(); // Sakura - cannon entity merging
+ public final me.samsuik.sakura.explosion.density.BlockDensityCache densityCache = new me.samsuik.sakura.explosion.density.BlockDensityCache(); // Sakura - explosion density cache
public abstract ResourceKey<LevelStem> getTypeKey();
diff --git a/src/main/java/net/minecraft/world/level/block/BasePressurePlateBlock.java b/src/main/java/net/minecraft/world/level/block/BasePressurePlateBlock.java
index f44d79ed9f3b93712ce8b40c020955d19ec8fb9d..4c5dbc6a6a03c9504ca7de35462d369305b08edd 100644
--- a/src/main/java/net/minecraft/world/level/block/BasePressurePlateBlock.java
+++ b/src/main/java/net/minecraft/world/level/block/BasePressurePlateBlock.java
@@ -99,6 +99,11 @@ public abstract class BasePressurePlateBlock extends Block {
if (output != j) {
BlockState iblockdata1 = this.setSignalForState(state, j);
+ // Sakura start - explosion density cache
+ if (!world.paperConfig().environment.optimizeExplosions) {
+ world.densityCache.clear(-1);
+ }
+ // Sakura end - explosion density cache
world.setBlock(pos, iblockdata1, 2);
this.updateNeighbours(world, pos);
world.setBlocksDirty(pos, state, iblockdata1);
diff --git a/src/main/java/net/minecraft/world/level/block/TripWireHookBlock.java b/src/main/java/net/minecraft/world/level/block/TripWireHookBlock.java
index 5e973eb53b240615e70b7d46ef4dc17b907ecaf9..5655aa0f5c91bb9c65a00d2f8a6fb6426d2a1c5d 100644
--- a/src/main/java/net/minecraft/world/level/block/TripWireHookBlock.java
+++ b/src/main/java/net/minecraft/world/level/block/TripWireHookBlock.java
@@ -163,6 +163,11 @@ public class TripWireHookBlock extends Block {
blockposition1 = pos.relative(enumdirection, j);
Direction enumdirection1 = enumdirection.getOpposite();
+ // Sakura start - explosion density cache
+ if (!world.paperConfig().environment.optimizeExplosions) {
+ world.densityCache.clear(-1);
+ }
+ // Sakura end - explosion density cache
world.setBlock(blockposition1, (BlockState) iblockdata3.setValue(TripWireHookBlock.FACING, enumdirection1), 3);
this.notifyNeighbors(world, blockposition1, enumdirection1);
this.playSound(world, blockposition1, flag4, flag5, flag2, flag3);
diff --git a/src/main/java/net/minecraft/world/phys/AABB.java b/src/main/java/net/minecraft/world/phys/AABB.java
index 68cc6f2a78a06293a29317fda72ab3ee79b3533a..a142bf12ef0b8c8d41cab846da2e161700f2db2b 100644
--- a/src/main/java/net/minecraft/world/phys/AABB.java
+++ b/src/main/java/net/minecraft/world/phys/AABB.java
@@ -367,4 +367,28 @@ public class AABB {
public static AABB ofSize(Vec3 center, double dx, double dy, double dz) {
return new AABB(center.x - dx / 2.0D, center.y - dy / 2.0D, center.z - dz / 2.0D, center.x + dx / 2.0D, center.y + dy / 2.0D, center.z + dz / 2.0D);
}
+
+ // Sakura start - explosion density cache
+ public final boolean isAABBInBounds(AABB bb) {
+ return this.minX <= bb.minX && this.maxX >= bb.maxX
+ && this.minY <= bb.minY && this.maxY >= bb.maxY
+ && this.minZ <= bb.minZ && this.maxZ >= bb.maxZ;
+ }
+
+ public final boolean isVec3InBounds(Vec3 p) {
+ return this.minX <= p.x && this.maxX >= p.x
+ && this.minY <= p.y && this.maxY >= p.y
+ && this.minZ <= p.z && this.maxZ >= p.z;
+ }
+
+ public final AABB expand(Vec3 pos) {
+ double minX = Math.min(this.minX, pos.x);
+ double minY = Math.min(this.minY, pos.y);
+ double minZ = Math.min(this.minZ, pos.z);
+ double maxX = Math.max(this.maxX, pos.x);
+ double maxY = Math.max(this.maxY, pos.y);
+ double maxZ = Math.max(this.maxZ, pos.z);
+ return new AABB(minX, minY, minZ, maxX, maxY, maxZ);
+ }
+ // Sakura end - explosion density cache
}
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