160 lines
6.9 KiB
Diff
160 lines
6.9 KiB
Diff
From b8d7f6c6cd036f9e845a1f07708681a023b68a2e Mon Sep 17 00:00:00 2001
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From: Byteflux <byte@byteflux.net>
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Date: Wed, 2 Mar 2016 11:59:48 -0600
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Subject: [PATCH] Optimize explosions
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The process of determining an entity's exposure from explosions can be
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expensive when there are hundreds or more entities in range.
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This patch adds a per-tick cache that is used for storing and retrieving
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an entity's exposure during an explosion.
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diff --git a/src/main/java/com/destroystokyo/paper/PaperWorldConfig.java b/src/main/java/com/destroystokyo/paper/PaperWorldConfig.java
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index dccccbf5b..3626aa717 100644
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--- a/src/main/java/com/destroystokyo/paper/PaperWorldConfig.java
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+++ b/src/main/java/com/destroystokyo/paper/PaperWorldConfig.java
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@@ -141,4 +141,10 @@ public class PaperWorldConfig {
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disableEndCredits = getBoolean("game-mechanics.disable-end-credits", false);
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log("End credits disabled: " + disableEndCredits);
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}
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+
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+ public boolean optimizeExplosions;
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+ private void optimizeExplosions() {
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+ optimizeExplosions = getBoolean("optimize-explosions", false);
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+ log("Optimize explosions: " + optimizeExplosions);
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+ }
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}
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diff --git a/src/main/java/net/minecraft/server/Explosion.java b/src/main/java/net/minecraft/server/Explosion.java
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index e558a3a57..18c55402d 100644
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--- a/src/main/java/net/minecraft/server/Explosion.java
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+++ b/src/main/java/net/minecraft/server/Explosion.java
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@@ -136,7 +136,7 @@ public class Explosion {
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d8 /= d11;
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d9 /= d11;
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d10 /= d11;
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- double d12 = (double) this.world.a(vec3d, entity.getBoundingBox());
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+ double d12 = this.getBlockDensity(vec3d, entity.getBoundingBox()); // Paper - Optimize explosions
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double d13 = (1.0D - d7) * d12;
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// CraftBukkit start
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@@ -312,4 +312,85 @@ public class Explosion {
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public List<BlockPosition> getBlocks() {
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return this.blocks;
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}
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+
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+ // Paper start - Optimize explosions
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+ private float getBlockDensity(Vec3D vec3d, AxisAlignedBB aabb) {
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+ if (!this.world.paperConfig.optimizeExplosions) {
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+ return this.world.a(vec3d, aabb);
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+ }
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+ CacheKey key = new CacheKey(this, aabb);
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+ Float blockDensity = this.world.explosionDensityCache.get(key);
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+ if (blockDensity == null) {
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+ blockDensity = this.world.a(vec3d, aabb);
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+ this.world.explosionDensityCache.put(key, blockDensity);
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+ }
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+
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+ return blockDensity;
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+ }
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+
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+ static class CacheKey {
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+ private final World world;
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+ private final double posX, posY, posZ;
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+ private final double minX, minY, minZ;
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+ private final double maxX, maxY, maxZ;
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+
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+ public CacheKey(Explosion explosion, AxisAlignedBB aabb) {
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+ this.world = explosion.world;
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+ this.posX = explosion.posX;
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+ this.posY = explosion.posY;
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+ this.posZ = explosion.posZ;
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+ this.minX = aabb.a;
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+ this.minY = aabb.b;
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+ this.minZ = aabb.c;
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+ this.maxX = aabb.d;
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+ this.maxY = aabb.e;
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+ this.maxZ = aabb.f;
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+ }
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+
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+ @Override
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+ public boolean equals(Object o) {
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+ if (this == o) return true;
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+ if (o == null || getClass() != o.getClass()) return false;
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+
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+ CacheKey cacheKey = (CacheKey) o;
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+
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+ if (Double.compare(cacheKey.posX, posX) != 0) return false;
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+ if (Double.compare(cacheKey.posY, posY) != 0) return false;
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+ if (Double.compare(cacheKey.posZ, posZ) != 0) return false;
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+ if (Double.compare(cacheKey.minX, minX) != 0) return false;
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+ if (Double.compare(cacheKey.minY, minY) != 0) return false;
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+ if (Double.compare(cacheKey.minZ, minZ) != 0) return false;
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+ if (Double.compare(cacheKey.maxX, maxX) != 0) return false;
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+ if (Double.compare(cacheKey.maxY, maxY) != 0) return false;
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+ if (Double.compare(cacheKey.maxZ, maxZ) != 0) return false;
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+ return world.equals(cacheKey.world);
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+ }
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+
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+ @Override
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+ public int hashCode() {
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+ int result;
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+ long temp;
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+ result = world.hashCode();
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+ temp = Double.doubleToLongBits(posX);
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+ result = 31 * result + (int) (temp ^ (temp >>> 32));
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+ temp = Double.doubleToLongBits(posY);
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+ result = 31 * result + (int) (temp ^ (temp >>> 32));
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+ temp = Double.doubleToLongBits(posZ);
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+ result = 31 * result + (int) (temp ^ (temp >>> 32));
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+ temp = Double.doubleToLongBits(minX);
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+ result = 31 * result + (int) (temp ^ (temp >>> 32));
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+ temp = Double.doubleToLongBits(minY);
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+ result = 31 * result + (int) (temp ^ (temp >>> 32));
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+ temp = Double.doubleToLongBits(minZ);
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+ result = 31 * result + (int) (temp ^ (temp >>> 32));
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+ temp = Double.doubleToLongBits(maxX);
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+ result = 31 * result + (int) (temp ^ (temp >>> 32));
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+ temp = Double.doubleToLongBits(maxY);
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+ result = 31 * result + (int) (temp ^ (temp >>> 32));
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+ temp = Double.doubleToLongBits(maxZ);
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+ result = 31 * result + (int) (temp ^ (temp >>> 32));
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+ return result;
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+ }
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+ }
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+ // Paper end
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}
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diff --git a/src/main/java/net/minecraft/server/MinecraftServer.java b/src/main/java/net/minecraft/server/MinecraftServer.java
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index 1ac8d61cd..96d31f874 100644
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--- a/src/main/java/net/minecraft/server/MinecraftServer.java
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+++ b/src/main/java/net/minecraft/server/MinecraftServer.java
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@@ -1029,6 +1029,7 @@ public abstract class MinecraftServer implements IAsyncTaskHandler, IMojangStati
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worldserver.getTracker().updatePlayers();
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this.methodProfiler.e();
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this.methodProfiler.e();
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+ worldserver.explosionDensityCache.clear(); // Paper - Optimize explosions
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}
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// this.f[i][this.ticks % 100] = SystemUtils.c() - j; // CraftBukkit
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diff --git a/src/main/java/net/minecraft/server/World.java b/src/main/java/net/minecraft/server/World.java
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index c40ecbc0c..1ca3eef11 100644
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--- a/src/main/java/net/minecraft/server/World.java
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+++ b/src/main/java/net/minecraft/server/World.java
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@@ -18,6 +18,7 @@ import org.apache.logging.log4j.Logger;
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// CraftBukkit start
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import com.google.common.collect.Maps;
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+import java.util.HashMap; // Paper
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import java.util.Map;
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import org.bukkit.Bukkit;
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import org.bukkit.block.BlockState;
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@@ -138,6 +139,7 @@ public abstract class World implements GeneratorAccess, IIBlockAccess, AutoClose
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private org.spigotmc.TickLimiter entityLimiter;
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private org.spigotmc.TickLimiter tileLimiter;
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private int tileTickPosition;
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+ public final Map<Explosion.CacheKey, Float> explosionDensityCache = new HashMap<>(); // Paper - Optimize explosions
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public CraftWorld getWorld() {
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return this.world;
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--
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2.18.0
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