From a17c879830b3beb5c4c246390355c0b2b1c14f9e Mon Sep 17 00:00:00 2001 From: Byteflux Date: Wed, 2 Mar 2016 11:59:48 -0600 Subject: [PATCH] Optimize explosions The process of determining an entity's exposure from explosions can be expensive when there are hundreds or more entities in range. This patch adds a per-tick cache that is used for storing and retrieving an entity's exposure during an explosion. diff --git a/src/main/java/com/destroystokyo/paper/PaperWorldConfig.java b/src/main/java/com/destroystokyo/paper/PaperWorldConfig.java index 7154d31..2be15d2 100644 --- a/src/main/java/com/destroystokyo/paper/PaperWorldConfig.java +++ b/src/main/java/com/destroystokyo/paper/PaperWorldConfig.java @@ -201,4 +201,10 @@ public class PaperWorldConfig { generateVillage = getBoolean("generator-settings.village", true); generateFlatBedrock = getBoolean("generator-settings.flat-bedrock", false); } + + public boolean optimizeExplosions; + private void optimizeExplosions() { + optimizeExplosions = getBoolean("optimize-explosions", false); + log("Optimize explosions: " + optimizeExplosions); + } } diff --git a/src/main/java/net/minecraft/server/Explosion.java b/src/main/java/net/minecraft/server/Explosion.java index 87e123c..afe402e 100644 --- a/src/main/java/net/minecraft/server/Explosion.java +++ b/src/main/java/net/minecraft/server/Explosion.java @@ -129,7 +129,7 @@ public class Explosion { d8 /= d11; d9 /= d11; d10 /= d11; - double d12 = (double) this.world.a(vec3d, entity.getBoundingBox()); + double d12 = this.getBlockDensity(vec3d, entity.getBoundingBox()); // Paper - Optimize explosions double d13 = (1.0D - d7) * d12; // CraftBukkit start @@ -296,4 +296,85 @@ public class Explosion { public List getBlocks() { return this.blocks; } + + // Paper start - Optimize explosions + private float getBlockDensity(Vec3D vec3d, AxisAlignedBB aabb) { + if (!this.world.paperConfig.optimizeExplosions) { + return this.world.a(vec3d, aabb); + } + CacheKey key = new CacheKey(this, aabb); + Float blockDensity = this.world.explosionDensityCache.get(key); + if (blockDensity == null) { + blockDensity = this.world.a(vec3d, aabb); + this.world.explosionDensityCache.put(key, blockDensity); + } + + return blockDensity; + } + + static class CacheKey { + private final World world; + private final double posX, posY, posZ; + private final double minX, minY, minZ; + private final double maxX, maxY, maxZ; + + public CacheKey(Explosion explosion, AxisAlignedBB aabb) { + this.world = explosion.world; + this.posX = explosion.posX; + this.posY = explosion.posY; + this.posZ = explosion.posZ; + this.minX = aabb.a; + this.minY = aabb.b; + this.minZ = aabb.c; + this.maxX = aabb.d; + this.maxY = aabb.e; + this.maxZ = aabb.f; + } + + @Override + public boolean equals(Object o) { + if (this == o) return true; + if (o == null || getClass() != o.getClass()) return false; + + CacheKey cacheKey = (CacheKey) o; + + if (Double.compare(cacheKey.posX, posX) != 0) return false; + if (Double.compare(cacheKey.posY, posY) != 0) return false; + if (Double.compare(cacheKey.posZ, posZ) != 0) return false; + if (Double.compare(cacheKey.minX, minX) != 0) return false; + if (Double.compare(cacheKey.minY, minY) != 0) return false; + if (Double.compare(cacheKey.minZ, minZ) != 0) return false; + if (Double.compare(cacheKey.maxX, maxX) != 0) return false; + if (Double.compare(cacheKey.maxY, maxY) != 0) return false; + if (Double.compare(cacheKey.maxZ, maxZ) != 0) return false; + return world.equals(cacheKey.world); + } + + @Override + public int hashCode() { + int result; + long temp; + result = world.hashCode(); + temp = Double.doubleToLongBits(posX); + result = 31 * result + (int) (temp ^ (temp >>> 32)); + temp = Double.doubleToLongBits(posY); + result = 31 * result + (int) (temp ^ (temp >>> 32)); + temp = Double.doubleToLongBits(posZ); + result = 31 * result + (int) (temp ^ (temp >>> 32)); + temp = Double.doubleToLongBits(minX); + result = 31 * result + (int) (temp ^ (temp >>> 32)); + temp = Double.doubleToLongBits(minY); + result = 31 * result + (int) (temp ^ (temp >>> 32)); + temp = Double.doubleToLongBits(minZ); + result = 31 * result + (int) (temp ^ (temp >>> 32)); + temp = Double.doubleToLongBits(maxX); + result = 31 * result + (int) (temp ^ (temp >>> 32)); + temp = Double.doubleToLongBits(maxY); + result = 31 * result + (int) (temp ^ (temp >>> 32)); + temp = Double.doubleToLongBits(maxZ); + result = 31 * result + (int) (temp ^ (temp >>> 32)); + return result; + } + } + // Paper end } diff --git a/src/main/java/net/minecraft/server/MinecraftServer.java b/src/main/java/net/minecraft/server/MinecraftServer.java index db425fb..733f8e7 100644 --- a/src/main/java/net/minecraft/server/MinecraftServer.java +++ b/src/main/java/net/minecraft/server/MinecraftServer.java @@ -863,6 +863,7 @@ public abstract class MinecraftServer implements Runnable, ICommandListener, IAs worldserver.timings.tracker.stopTiming(); // Spigot this.methodProfiler.b(); this.methodProfiler.b(); + worldserver.explosionDensityCache.clear(); // Paper - Optimize explosions // } // CraftBukkit // this.i[i][this.ticks % 100] = System.nanoTime() - j; // CraftBukkit diff --git a/src/main/java/net/minecraft/server/World.java b/src/main/java/net/minecraft/server/World.java index a062013..6ea06c5 100644 --- a/src/main/java/net/minecraft/server/World.java +++ b/src/main/java/net/minecraft/server/World.java @@ -32,6 +32,7 @@ import org.bukkit.generator.ChunkGenerator; // Paper start import java.util.concurrent.ExecutorService; import java.util.concurrent.Executors; +import java.util.HashMap; import com.google.common.util.concurrent.ThreadFactoryBuilder; // Paper end @@ -141,6 +142,7 @@ public abstract class World implements IBlockAccess { private org.spigotmc.TickLimiter tileLimiter; private int tileTickPosition; public ExecutorService lightingExecutor = Executors.newSingleThreadExecutor(new ThreadFactoryBuilder().setNameFormat("Paper - Lighting Thread").build()); // Paper - Asynchronous lighting updates + public final Map explosionDensityCache = new HashMap(); // Paper - Optimize explosions public CraftWorld getWorld() { return this.world; -- 2.7.3