From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001 From: Byteflux <byte@byteflux.net> 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 50dec5cb5e924301842300e8fc80cb671b6b9173..f038d3f7dc7d1034a3ee9f2384a85642f224836e 100644 --- a/src/main/java/com/destroystokyo/paper/PaperWorldConfig.java +++ b/src/main/java/com/destroystokyo/paper/PaperWorldConfig.java @@ -150,4 +150,10 @@ public class PaperWorldConfig { disableEndCredits = getBoolean("game-mechanics.disable-end-credits", false); log("End credits disabled: " + disableEndCredits); } + + 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 a063d1bfaa1acd20a5de9701eef028a543235d5e..5583860f152aadcbe74bf7b99e7efd8e47cefa35 100644 --- a/src/main/java/net/minecraft/server/Explosion.java +++ b/src/main/java/net/minecraft/server/Explosion.java @@ -177,7 +177,7 @@ public class Explosion { d8 /= d11; d9 /= d11; d10 /= d11; - double d12 = (double) a(vec3d, entity); + double d12 = this.getBlockDensity(vec3d, entity); // Paper - Optimize explosions double d13 = (1.0D - d7) * d12; // CraftBukkit start @@ -384,4 +384,84 @@ public class Explosion { private Effect() {} } + // Paper start - Optimize explosions + private float getBlockDensity(Vec3D vec3d, Entity entity) { + if (!this.world.paperConfig.optimizeExplosions) { + return a(vec3d, entity); + } + CacheKey key = new CacheKey(this, entity.getBoundingBox()); + Float blockDensity = this.world.explosionDensityCache.get(key); + if (blockDensity == null) { + blockDensity = a(vec3d, entity); + 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.minX; + this.minY = aabb.minY; + this.minZ = aabb.minZ; + this.maxX = aabb.maxX; + this.maxY = aabb.maxY; + this.maxZ = aabb.maxZ; + } + + @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 c61037c837e29544e3afeb0b23f422073d3f5166..a67c31a6021d881b49cfdb75f514404c342eea45 100644 --- a/src/main/java/net/minecraft/server/MinecraftServer.java +++ b/src/main/java/net/minecraft/server/MinecraftServer.java @@ -1184,6 +1184,7 @@ public abstract class MinecraftServer extends IAsyncTaskHandlerReentrant<TickTas this.methodProfiler.exit(); this.methodProfiler.exit(); + worldserver.explosionDensityCache.clear(); // Paper - Optimize explosions } } diff --git a/src/main/java/net/minecraft/server/World.java b/src/main/java/net/minecraft/server/World.java index 1bb36201544987cf44b9da2494e4cc54385f7e77..4604634577418be8382a3d84eaaa90869834c88f 100644 --- a/src/main/java/net/minecraft/server/World.java +++ b/src/main/java/net/minecraft/server/World.java @@ -80,6 +80,7 @@ public abstract class World implements GeneratorAccess, AutoCloseable { private org.spigotmc.TickLimiter entityLimiter; private org.spigotmc.TickLimiter tileLimiter; private int tileTickPosition; + public final Map<Explosion.CacheKey, Float> explosionDensityCache = new HashMap<>(); // Paper - Optimize explosions public CraftWorld getWorld() { return this.world;