From a5de89e41e9dcf763cd0318fbab687fb11f534f7 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 80500108..20e1e0c2 100644 --- a/src/main/java/com/destroystokyo/paper/PaperWorldConfig.java +++ b/src/main/java/com/destroystokyo/paper/PaperWorldConfig.java @@ -171,4 +171,10 @@ 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 a1ebcf85..e7f0e84d 100644 --- a/src/main/java/net/minecraft/server/Explosion.java +++ b/src/main/java/net/minecraft/server/Explosion.java @@ -130,7 +130,7 @@ 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 @@ -298,4 +298,85 @@ 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 d63a243f..4e8ce79f 100644 --- a/src/main/java/net/minecraft/server/MinecraftServer.java +++ b/src/main/java/net/minecraft/server/MinecraftServer.java @@ -889,6 +889,7 @@ public abstract class MinecraftServer implements ICommandListener, Runnable, IAs worldserver.getTracker().updatePlayers(); 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 77ed2d24..fc7315f7 100644 --- a/src/main/java/net/minecraft/server/World.java +++ b/src/main/java/net/minecraft/server/World.java @@ -16,6 +16,7 @@ import javax.annotation.Nullable; // CraftBukkit start import com.google.common.collect.Maps; +import java.util.HashMap; // Paper import java.util.Map; import org.bukkit.Bukkit; import org.bukkit.block.BlockState; @@ -138,6 +139,7 @@ public abstract class World implements IBlockAccess { private org.spigotmc.TickLimiter entityLimiter; private org.spigotmc.TickLimiter tileLimiter; private int tileTickPosition; + public final Map explosionDensityCache = new HashMap<>(); // Paper - Optimize explosions public CraftWorld getWorld() { return this.world; -- 2.14.3