From f945ca215b4e13bd1ef95950c3c916db65175ea9 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 c2b9690a0..a5ec0bc0e 100644 --- a/src/main/java/com/destroystokyo/paper/PaperWorldConfig.java +++ b/src/main/java/com/destroystokyo/paper/PaperWorldConfig.java @@ -145,4 +145,10 @@ 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 cdd893950..bd6a0bd16 100644 --- a/src/main/java/net/minecraft/server/Explosion.java +++ b/src/main/java/net/minecraft/server/Explosion.java @@ -172,7 +172,7 @@ 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 @@ -361,4 +361,84 @@ 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 7bb83014b..6d9db5294 100644 --- a/src/main/java/net/minecraft/server/MinecraftServer.java +++ b/src/main/java/net/minecraft/server/MinecraftServer.java @@ -1139,6 +1139,7 @@ public abstract class MinecraftServer extends IAsyncTaskHandlerReentrant explosionDensityCache = new HashMap<>(); // Paper - Optimize explosions public CraftWorld getWorld() { return this.world; -- 2.22.0