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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/net/minecraft/server/MinecraftServer.java b/src/main/java/net/minecraft/server/MinecraftServer.java
index f70468b2cc4a782d3d7cc7854192fbbc3ad3020f..9c26725e12adb2d17b9fa27f632fbad02e904c9a 100644
--- a/src/main/java/net/minecraft/server/MinecraftServer.java
+++ b/src/main/java/net/minecraft/server/MinecraftServer.java
@@ -1611,6 +1611,7 @@ public abstract class MinecraftServer extends ReentrantBlockableEventLoop<TickTa
gameprofilerfiller.pop();
gameprofilerfiller.pop();
+ worldserver.explosionDensityCache.clear(); // Paper - Optimize explosions
}
gameprofilerfiller.popPush("connection");
diff --git a/src/main/java/net/minecraft/world/level/Level.java b/src/main/java/net/minecraft/world/level/Level.java
index 3d2f579cf2b7b96f4ce2588f9655d2287767b01c..7e6680d0618173e23d323b4b29f0a2fc966789e7 100644
--- a/src/main/java/net/minecraft/world/level/Level.java
+++ b/src/main/java/net/minecraft/world/level/Level.java
@@ -169,6 +169,7 @@ public abstract class Level implements LevelAccessor, AutoCloseable {
private org.spigotmc.TickLimiter entityLimiter;
private org.spigotmc.TickLimiter tileLimiter;
private int tileTickPosition;
+ public final Map<ServerExplosion.CacheKey, Float> explosionDensityCache = new HashMap<>(); // Paper - Optimize explosions
public CraftWorld getWorld() {
return this.world;
diff --git a/src/main/java/net/minecraft/world/level/ServerExplosion.java b/src/main/java/net/minecraft/world/level/ServerExplosion.java
index 67685dfa8eb4a74e70ef982291a55d145d6abc66..bbe50f60e653e60c844ca6688e781fa69d67905a 100644
--- a/src/main/java/net/minecraft/world/level/ServerExplosion.java
+++ b/src/main/java/net/minecraft/world/level/ServerExplosion.java
@@ -206,7 +206,7 @@ public class ServerExplosion implements Explosion {
d3 /= d4;
boolean flag = this.damageCalculator.shouldDamageEntity(this, entity);
float f1 = this.damageCalculator.getKnockbackMultiplier(entity);
- float f2 = !flag && f1 == 0.0F ? 0.0F : ServerExplosion.getSeenPercent(this.center, entity);
+ float f2 = !flag && f1 == 0.0F ? 0.0F : this.getBlockDensity(this.center, entity); // Paper - Optimize explosions
if (flag) {
// CraftBukkit start
@@ -487,4 +487,85 @@ public class ServerExplosion implements Explosion {
}
}
+
+ // Paper start - Optimize explosions
+ private float getBlockDensity(Vec3 vec3d, Entity entity) {
+ if (!this.level.paperConfig().environment.optimizeExplosions) {
+ return getSeenPercent(vec3d, entity);
+ }
+ CacheKey key = new CacheKey(this, entity.getBoundingBox());
+ Float blockDensity = this.level.explosionDensityCache.get(key);
+ if (blockDensity == null) {
+ blockDensity = getSeenPercent(vec3d, entity);
+ this.level.explosionDensityCache.put(key, blockDensity);
+ }
+
+ return blockDensity;
+ }
+
+ static class CacheKey {
+ private final Level world;
+ private final double posX, posY, posZ;
+ private final double minX, minY, minZ;
+ private final double maxX, maxY, maxZ;
+
+ public CacheKey(Explosion explosion, AABB aabb) {
+ this.world = explosion.level();
+ this.posX = explosion.center().x;
+ this.posY = explosion.center().y;
+ this.posZ = explosion.center().z;
+ 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
}
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