64 lines
3.8 KiB
Diff
64 lines
3.8 KiB
Diff
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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From: SuperCoder7979 <25208576+SuperCoder7979@users.noreply.github.com>
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Date: Tue, 3 Nov 2020 23:48:05 -0600
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Subject: [PATCH] Significantly improve performance of the end generation
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This patch implements a noise cache for the end which significantly reduces the computation time of generation. This results in about a 3x improvement.
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Original code by SuperCoder7979 and Gegy in Lithium, licensed under LGPL-3.0 (Source: https://github.com/jellysquid3/lithium-fabric)
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Co-authored-by: Gegy <gegy1000@gmail.com>
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Co-authored-by: Dylan Xaldin <Puremin0rez515@gmail.com>
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Co-authored-by: pop4959 <pop4959@gmail.com>
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diff --git a/src/main/java/net/minecraft/world/level/biome/TheEndBiomeSource.java b/src/main/java/net/minecraft/world/level/biome/TheEndBiomeSource.java
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index 3f9127f93c9720c89b578d36a1bcdb89fc01222a..9004d9d7dcb1466047da62d0a6d01e7b4ac6a216 100644
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--- a/src/main/java/net/minecraft/world/level/biome/TheEndBiomeSource.java
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+++ b/src/main/java/net/minecraft/world/level/biome/TheEndBiomeSource.java
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@@ -29,6 +29,16 @@ public class TheEndBiomeSource extends BiomeSource {
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private final Holder<Biome> midlands;
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private final Holder<Biome> islands;
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private final Holder<Biome> barrens;
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+ // Paper start
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+ private static final class NoiseCache {
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+ public long[] keys = new long[8192];
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+ public float[] values = new float[8192];
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+ public NoiseCache() {
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+ java.util.Arrays.fill(keys, Long.MIN_VALUE);
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+ }
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+ }
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+ private static final ThreadLocal<java.util.Map<SimplexNoise, NoiseCache>> noiseCache = ThreadLocal.withInitial(java.util.WeakHashMap::new);
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+ // Paper end
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public TheEndBiomeSource(Registry<Biome> biomeRegistry, long seed) {
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this(seed, biomeRegistry.getOrCreateHolder(Biomes.THE_END), biomeRegistry.getOrCreateHolder(Biomes.END_HIGHLANDS), biomeRegistry.getOrCreateHolder(Biomes.END_MIDLANDS), biomeRegistry.getOrCreateHolder(Biomes.SMALL_END_ISLANDS), biomeRegistry.getOrCreateHolder(Biomes.END_BARRENS));
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@@ -87,12 +97,26 @@ public class TheEndBiomeSource extends BiomeSource {
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float f = 100.0F - Mth.sqrt((long) i * (long) i + (long) j * (long) j) * 8.0F; // Paper - cast ints to long to avoid integer overflow
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f = Mth.clamp(f, -100.0F, 80.0F);
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+ NoiseCache cache = noiseCache.get().computeIfAbsent(simplexNoise, noiseKey -> new NoiseCache()); // Paper
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for(int o = -12; o <= 12; ++o) {
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for(int p = -12; p <= 12; ++p) {
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long q = (long)(k + o);
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long r = (long)(l + p);
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- if (q * q + r * r > 4096L && simplexNoise.getValue((double)q, (double)r) < (double)-0.9F) {
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- float g = (Mth.abs((float)q) * 3439.0F + Mth.abs((float)r) * 147.0F) % 13.0F + 9.0F;
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+ // Paper start - Significantly improve end generation performance by using a noise cache
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+ long key = net.minecraft.world.level.ChunkPos.asLong((int) q, (int) r);
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+ int index = (int) it.unimi.dsi.fastutil.HashCommon.mix(key) & 8191;
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+ float g = Float.MIN_VALUE;
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+ if (cache.keys[index] == key) {
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+ g = cache.values[index];
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+ } else {
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+ if (q * q + r * r > 4096L && simplexNoise.getValue((double)q, (double)r) < (double)-0.9F) {
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+ g = (Mth.abs((float) q) * 3439.0F + Mth.abs((float) r) * 147.0F) % 13.0F + 9.0F;
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+ }
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+ cache.keys[index] = key;
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+ cache.values[index] = g;
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+ }
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+ if (g != Float.MIN_VALUE) {
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+ // Paper end
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float h = (float)(m - o * 2);
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float s = (float)(n - p * 2);
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float t = 100.0F - Mth.sqrt(h * h + s * s) * g;
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