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PaperMC/Spigot-Server-Patches/0094-Optimized-Light-Level-Comparisons.patch
Aikar 7c7f8b83ab Optimized Light Level Comparisons 
Use an optimized method to test if a block position meets a desired light level.

This method benefits from returning as soon as the desired light level matches.

Also Optimize Grass more
2016-03-18 23:55:31 -04:00

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From d2745c17b2cd8c0c9edf0d6cc7adeee17cdd4432 Mon Sep 17 00:00:00 2001
From: Aikar <aikar@aikar.co>
Date: Fri, 18 Mar 2016 21:22:56 -0400
Subject: [PATCH] Optimized Light Level Comparisons
Use an optimized method to test if a block position meets a desired light level.
This method benefits from returning as soon as the desired light level matches.
diff --git a/src/main/java/net/minecraft/server/BlockCrops.java b/src/main/java/net/minecraft/server/BlockCrops.java
index 7c909d8..5d6e6cb 100644
--- a/src/main/java/net/minecraft/server/BlockCrops.java
+++ b/src/main/java/net/minecraft/server/BlockCrops.java
@@ -48,7 +48,7 @@ public class BlockCrops extends BlockPlant implements IBlockFragilePlantElement
public void b(World world, BlockPosition blockposition, IBlockData iblockdata, Random random) {
super.b(world, blockposition, iblockdata, random);
- if (world.getLightLevel(blockposition.up()) >= 9) {
+ if (world.isLightLevel(blockposition.up(), 9)) { // Paper
int i = this.x(iblockdata);
if (i < this.g()) {
diff --git a/src/main/java/net/minecraft/server/BlockGrass.java b/src/main/java/net/minecraft/server/BlockGrass.java
index fe55848..8fc736d 100644
--- a/src/main/java/net/minecraft/server/BlockGrass.java
+++ b/src/main/java/net/minecraft/server/BlockGrass.java
@@ -29,7 +29,8 @@ public class BlockGrass extends Block implements IBlockFragilePlantElement {
public void b(World world, BlockPosition blockposition, IBlockData iblockdata, Random random) {
if (!world.isClientSide) {
- if (world.getLightLevel(blockposition.up()) < 4 && world.getType(blockposition.up()).c() > 2) {
+ int lightLevel = -1; // Paper
+ if (world.getType(blockposition.up()).c() > 2 && (lightLevel = world.getLightLevel(blockposition.up())) < 4) { // Paper - move light check to end to avoid unneeded light lookups
// CraftBukkit start
// world.setTypeUpdate(blockposition, Blocks.DIRT.getBlockData());
org.bukkit.World bworld = world.getWorld();
@@ -44,18 +45,25 @@ public class BlockGrass extends Block implements IBlockFragilePlantElement {
}
// CraftBukkit end
} else {
- if (world.getLightLevel(blockposition.up()) >= 9) {
+ // Paper start
+ // If light was calculated above, reuse it, else grab it
+ if (lightLevel == -1) {
+ lightLevel = world.getLightLevel(blockposition.up());
+ }
+ if (lightLevel >= 9) {
+ // Paper end
for (int i = 0; i < 4; ++i) {
BlockPosition blockposition1 = blockposition.a(random.nextInt(3) - 1, random.nextInt(5) - 3, random.nextInt(3) - 1);
- if (blockposition1.getY() >= 0 && blockposition1.getY() < 256 && !world.isLoaded(blockposition1)) {
+ IBlockData iblockdata2 = world.getTypeIfLoaded(blockposition1); // Paper - moved up
+ if (iblockdata2 == null) { // Paper
return;
}
IBlockData iblockdata1 = world.getType(blockposition1.up());
- IBlockData iblockdata2 = world.getType(blockposition1);
+ //IBlockData iblockdata2 = world.getTypeIfLoaded(blockposition1); // Paper - moved up
- if (iblockdata2.getBlock() == Blocks.DIRT && iblockdata2.get(BlockDirt.VARIANT) == BlockDirt.EnumDirtVariant.DIRT && world.getLightLevel(blockposition1.up()) >= 4 && iblockdata1.c() <= 2) {
+ if (iblockdata2.getBlock() == Blocks.DIRT && iblockdata2.get(BlockDirt.VARIANT) == BlockDirt.EnumDirtVariant.DIRT && iblockdata1.c() <= 2 && world.isLightLevel(blockposition1.up(), 4)) { // Paper - move last check before isLightLevel to avoid unneeded light checks
// CraftBukkit start
// world.setTypeUpdate(blockposition1, Blocks.GRASS.getBlockData());
org.bukkit.World bworld = world.getWorld();
diff --git a/src/main/java/net/minecraft/server/BlockSapling.java b/src/main/java/net/minecraft/server/BlockSapling.java
index 8b34250..b6de103 100644
--- a/src/main/java/net/minecraft/server/BlockSapling.java
+++ b/src/main/java/net/minecraft/server/BlockSapling.java
@@ -34,7 +34,7 @@ public class BlockSapling extends BlockPlant implements IBlockFragilePlantElemen
public void b(World world, BlockPosition blockposition, IBlockData iblockdata, Random random) {
if (!world.isClientSide) {
super.b(world, blockposition, iblockdata, random);
- if (world.getLightLevel(blockposition.up()) >= 9 && random.nextInt(Math.max(2, (int) (((100 / world.spigotConfig.saplingModifier) * 7) + 0.5F))) == 0) { // Spigot
+ if (world.isLightLevel(blockposition.up(), 9) && random.nextInt(Math.max(2, (int) (((100 / world.spigotConfig.saplingModifier) * 7) + 0.5F))) == 0) { // Spigot // Paper
// CraftBukkit start
world.captureTreeGeneration = true;
// CraftBukkit end
diff --git a/src/main/java/net/minecraft/server/BlockStem.java b/src/main/java/net/minecraft/server/BlockStem.java
index 097d11e..d0fa4ae 100644
--- a/src/main/java/net/minecraft/server/BlockStem.java
+++ b/src/main/java/net/minecraft/server/BlockStem.java
@@ -47,7 +47,7 @@ public class BlockStem extends BlockPlant implements IBlockFragilePlantElement {
public void b(World world, BlockPosition blockposition, IBlockData iblockdata, Random random) {
super.b(world, blockposition, iblockdata, random);
- if (world.getLightLevel(blockposition.up()) >= 9) {
+ if (world.isLightLevel(blockposition.up(), 9)) { // Paper
float f = BlockCrops.a((Block) this, world, blockposition);
if (random.nextInt((int) ((100 / (this == Blocks.PUMPKIN_STEM ? world.spigotConfig.pumpkinModifier : world.spigotConfig.melonModifier)) * (25.0F / f)) + 1) == 0) { // Spigot
diff --git a/src/main/java/net/minecraft/server/EntityMonster.java b/src/main/java/net/minecraft/server/EntityMonster.java
index 64f4754..6dc21fb 100644
--- a/src/main/java/net/minecraft/server/EntityMonster.java
+++ b/src/main/java/net/minecraft/server/EntityMonster.java
@@ -118,17 +118,17 @@ public abstract class EntityMonster extends EntityCreature implements IMonster {
if (this.world.b(EnumSkyBlock.SKY, blockposition) > this.random.nextInt(32)) {
return false;
} else {
- int i = this.world.getLightLevel(blockposition);
-
+ //int i = this.world.getLightLevel(blockposition); // Paper
+ boolean passes; // Paper
if (this.world.V()) {
int j = this.world.af();
this.world.c(10);
- i = this.world.getLightLevel(blockposition);
+ passes = world.isLightLevel(blockposition, this.random.nextInt(8)); // Paper
this.world.c(j);
- }
+ } else { passes = world.isLightLevel(blockposition, this.random.nextInt(8)); } // Paper
- return i <= this.random.nextInt(8);
+ return passes; // Paper
}
}
diff --git a/src/main/java/net/minecraft/server/EntityZombie.java b/src/main/java/net/minecraft/server/EntityZombie.java
index 949452c..d6c07a2 100644
--- a/src/main/java/net/minecraft/server/EntityZombie.java
+++ b/src/main/java/net/minecraft/server/EntityZombie.java
@@ -194,7 +194,7 @@ public class EntityZombie extends EntityMonster {
int j1 = j + MathHelper.nextInt(this.random, 7, 40) * MathHelper.nextInt(this.random, -1, 1);
int k1 = k + MathHelper.nextInt(this.random, 7, 40) * MathHelper.nextInt(this.random, -1, 1);
- if (this.world.getType(new BlockPosition(i1, j1 - 1, k1)).q() && this.world.getLightLevel(new BlockPosition(i1, j1, k1)) < 10) {
+ if (this.world.getType(new BlockPosition(i1, j1 - 1, k1)).q() && !this.world.isLightLevel(new BlockPosition(i1, j1, k1), 10)) { // Paper
entityzombie.setPosition((double) i1, (double) j1, (double) k1);
if (!this.world.isPlayerNearby((double) i1, (double) j1, (double) k1, 7.0D) && this.world.a(entityzombie.getBoundingBox(), (Entity) entityzombie) && this.world.getCubes(entityzombie, entityzombie.getBoundingBox()).isEmpty() && !this.world.containsLiquid(entityzombie.getBoundingBox())) {
this.world.addEntity(entityzombie, CreatureSpawnEvent.SpawnReason.REINFORCEMENTS); // CraftBukkit
--
2.7.4
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