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Leaf/leaf-server/minecraft-patches/features/0063-Optimize-noise-generation.patch
Dreeam 3c25377465 Drop some unused patches 
ClassInstanceMultiMap belongs to Minecraft vanilla entity storage.
And is unused, since replaced by spottedleaf's entity storage (rewrite chunk system).
However these patches might be useful for vanilla entity storage if is used.
2025-07-09 04:20:02 +08:00

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From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Martijn Muijsers <martijnmuijsers@live.nl>
Date: Wed, 30 Nov 2022 19:49:14 +0100
Subject: [PATCH] Optimize noise generation
License: MIT (https://opensource.org/licenses/MIT)
Gale - https://galemc.org
This patch is based on the following mixins:
* "com/ishland/c2me/opts/math/mixin/MixinOctavePerlinNoiseSampler.java"
* "com/ishland/c2me/opts/math/mixin/MixinPerlinNoiseSampler.java"
By: ishland <ishlandmc@yeah.net>
As part of: C2ME (https://github.com/RelativityMC/C2ME-fabric)
Licensed under: MIT (https://opensource.org/licenses/MIT)
diff --git a/net/minecraft/world/level/levelgen/synth/ImprovedNoise.java b/net/minecraft/world/level/levelgen/synth/ImprovedNoise.java
index fb11a2eea540d55e50eab59f9857ca5d99f556f8..dcc1a3f8b611c9f103b848db90b077b984b60ada 100644
--- a/net/minecraft/world/level/levelgen/synth/ImprovedNoise.java
+++ b/net/minecraft/world/level/levelgen/synth/ImprovedNoise.java
@@ -11,6 +11,27 @@ public final class ImprovedNoise {
public final double yo;
public final double zo;
+ // Gale start - C2ME - optimize noise generation
+ private static final double[] FLAT_SIMPLEX_GRAD = new double[]{
+ 1, 1, 0, 0,
+ -1, 1, 0, 0,
+ 1, -1, 0, 0,
+ -1, -1, 0, 0,
+ 1, 0, 1, 0,
+ -1, 0, 1, 0,
+ 1, 0, -1, 0,
+ -1, 0, -1, 0,
+ 0, 1, 1, 0,
+ 0, -1, 1, 0,
+ 0, 1, -1, 0,
+ 0, -1, -1, 0,
+ 1, 1, 0, 0,
+ 0, -1, 1, 0,
+ -1, 1, 0, 0,
+ 0, -1, -1, 0,
+ };
+ // Gale end - C2ME - optimize noise generation
+
public ImprovedNoise(RandomSource random) {
this.xo = random.nextDouble() * 256.0;
this.yo = random.nextDouble() * 256.0;
@@ -38,9 +59,11 @@ public final class ImprovedNoise {
double d = x + this.xo;
double d1 = y + this.yo;
double d2 = z + this.zo;
- int floor = Mth.floor(d);
- int floor1 = Mth.floor(d1);
- int floor2 = Mth.floor(d2);
+ // Gale start - C2ME - optimize noise generation - optimize: remove frequent type conversions
+ double floor = Math.floor(d);
+ double floor1 = Math.floor(d1);
+ double floor2 = Math.floor(d2);
+ // Gale end - C2ME - optimize noise generation - optimize: remove frequent type conversions
double d3 = d - floor;
double d4 = d1 - floor1;
double d5 = d2 - floor2;
@@ -53,25 +76,27 @@ public final class ImprovedNoise {
d6 = d4;
}
- d7 = Mth.floor(d6 / yScale + 1.0E-7F) * yScale;
+ d7 = Math.floor(d6 / yScale + 1.0E-7F) * yScale; // Gale - C2ME - optimize noise generation - optimize: remove frequent type conversions
} else {
d7 = 0.0;
}
- return this.sampleAndLerp(floor, floor1, floor2, d3, d4 - d7, d5, d4);
+ return this.sampleAndLerp((int) floor, (int) floor1, (int) floor2, d3, d4 - d7, d5, d4); // Gale - C2ME - optimize noise generation - optimize: remove frequent type conversions
}
public double noiseWithDerivative(double x, double y, double z, double[] values) {
double d = x + this.xo;
double d1 = y + this.yo;
double d2 = z + this.zo;
- int floor = Mth.floor(d);
- int floor1 = Mth.floor(d1);
- int floor2 = Mth.floor(d2);
+ // Gale start - C2ME - optimize noise generation - optimize: remove frequent type conversions
+ double floor = Math.floor(d);
+ double floor1 = Math.floor(d1);
+ double floor2 = Math.floor(d2);
+ // Gale end - C2ME - optimize noise generation - optimize: remove frequent type conversions
double d3 = d - floor;
double d4 = d1 - floor1;
double d5 = d2 - floor2;
- return this.sampleWithDerivative(floor, floor1, floor2, d3, d4, d5, values);
+ return this.sampleWithDerivative((int) floor, (int) floor1, (int) floor2, d3, d4, d5, values); // Gale - C2ME - optimize noise generation - optimize: remove frequent type conversions
}
private static double gradDot(int gradIndex, double xFactor, double yFactor, double zFactor) {
@@ -83,24 +108,69 @@ public final class ImprovedNoise {
}
private double sampleAndLerp(int gridX, int gridY, int gridZ, double deltaX, double weirdDeltaY, double deltaZ, double deltaY) {
- int i = this.p(gridX);
- int i1 = this.p(gridX + 1);
- int i2 = this.p(i + gridY);
- int i3 = this.p(i + gridY + 1);
- int i4 = this.p(i1 + gridY);
- int i5 = this.p(i1 + gridY + 1);
- double d = gradDot(this.p(i2 + gridZ), deltaX, weirdDeltaY, deltaZ);
- double d1 = gradDot(this.p(i4 + gridZ), deltaX - 1.0, weirdDeltaY, deltaZ);
- double d2 = gradDot(this.p(i3 + gridZ), deltaX, weirdDeltaY - 1.0, deltaZ);
- double d3 = gradDot(this.p(i5 + gridZ), deltaX - 1.0, weirdDeltaY - 1.0, deltaZ);
- double d4 = gradDot(this.p(i2 + gridZ + 1), deltaX, weirdDeltaY, deltaZ - 1.0);
- double d5 = gradDot(this.p(i4 + gridZ + 1), deltaX - 1.0, weirdDeltaY, deltaZ - 1.0);
- double d6 = gradDot(this.p(i3 + gridZ + 1), deltaX, weirdDeltaY - 1.0, deltaZ - 1.0);
- double d7 = gradDot(this.p(i5 + gridZ + 1), deltaX - 1.0, weirdDeltaY - 1.0, deltaZ - 1.0);
- double d8 = Mth.smoothstep(deltaX);
- double d9 = Mth.smoothstep(deltaY);
- double d10 = Mth.smoothstep(deltaZ);
- return Mth.lerp3(d8, d9, d10, d, d1, d2, d3, d4, d5, d6, d7);
+ // Gale start - C2ME - optimize noise generation - inline math & small optimization: remove frequent type conversions and redundant ops
+ final int var0 = gridX & 0xFF;
+ final int var1 = (gridX + 1) & 0xFF;
+ final int var2 = this.p[var0] & 0xFF;
+ final int var3 = this.p[var1] & 0xFF;
+ final int var4 = (var2 + gridY) & 0xFF;
+ final int var5 = (var3 + gridY) & 0xFF;
+ final int var6 = (var2 + gridY + 1) & 0xFF;
+ final int var7 = (var3 + gridY + 1) & 0xFF;
+ final int var8 = this.p[var4] & 0xFF;
+ final int var9 = this.p[var5] & 0xFF;
+ final int var10 = this.p[var6] & 0xFF;
+ final int var11 = this.p[var7] & 0xFF;
+
+ final int var12 = (var8 + gridZ) & 0xFF;
+ final int var13 = (var9 + gridZ) & 0xFF;
+ final int var14 = (var10 + gridZ) & 0xFF;
+ final int var15 = (var11 + gridZ) & 0xFF;
+ final int var16 = (var8 + gridZ + 1) & 0xFF;
+ final int var17 = (var9 + gridZ + 1) & 0xFF;
+ final int var18 = (var10 + gridZ + 1) & 0xFF;
+ final int var19 = (var11 + gridZ + 1) & 0xFF;
+ final int var20 = (this.p[var12] & 15) << 2;
+ final int var21 = (this.p[var13] & 15) << 2;
+ final int var22 = (this.p[var14] & 15) << 2;
+ final int var23 = (this.p[var15] & 15) << 2;
+ final int var24 = (this.p[var16] & 15) << 2;
+ final int var25 = (this.p[var17] & 15) << 2;
+ final int var26 = (this.p[var18] & 15) << 2;
+ final int var27 = (this.p[var19] & 15) << 2;
+ final double var60 = deltaX - 1.0;
+ final double var61 = weirdDeltaY - 1.0;
+ final double var62 = deltaZ - 1.0;
+ final double var87 = FLAT_SIMPLEX_GRAD[(var20) | 0] * deltaX + FLAT_SIMPLEX_GRAD[(var20) | 1] * weirdDeltaY + FLAT_SIMPLEX_GRAD[(var20) | 2] * deltaZ;
+ final double var88 = FLAT_SIMPLEX_GRAD[(var21) | 0] * var60 + FLAT_SIMPLEX_GRAD[(var21) | 1] * weirdDeltaY + FLAT_SIMPLEX_GRAD[(var21) | 2] * deltaZ;
+ final double var89 = FLAT_SIMPLEX_GRAD[(var22) | 0] * deltaX + FLAT_SIMPLEX_GRAD[(var22) | 1] * var61 + FLAT_SIMPLEX_GRAD[(var22) | 2] * deltaZ;
+ final double var90 = FLAT_SIMPLEX_GRAD[(var23) | 0] * var60 + FLAT_SIMPLEX_GRAD[(var23) | 1] * var61 + FLAT_SIMPLEX_GRAD[(var23) | 2] * deltaZ;
+ final double var91 = FLAT_SIMPLEX_GRAD[(var24) | 0] * deltaX + FLAT_SIMPLEX_GRAD[(var24) | 1] * weirdDeltaY + FLAT_SIMPLEX_GRAD[(var24) | 2] * var62;
+ final double var92 = FLAT_SIMPLEX_GRAD[(var25) | 0] * var60 + FLAT_SIMPLEX_GRAD[(var25) | 1] * weirdDeltaY + FLAT_SIMPLEX_GRAD[(var25) | 2] * var62;
+ final double var93 = FLAT_SIMPLEX_GRAD[(var26) | 0] * deltaX + FLAT_SIMPLEX_GRAD[(var26) | 1] * var61 + FLAT_SIMPLEX_GRAD[(var26) | 2] * var62;
+ final double var94 = FLAT_SIMPLEX_GRAD[(var27) | 0] * var60 + FLAT_SIMPLEX_GRAD[(var27) | 1] * var61 + FLAT_SIMPLEX_GRAD[(var27) | 2] * var62;
+
+ final double var95 = deltaX * 6.0 - 15.0;
+ final double var96 = deltaY * 6.0 - 15.0;
+ final double var97 = deltaZ * 6.0 - 15.0;
+ final double var98 = deltaX * var95 + 10.0;
+ final double var99 = deltaY * var96 + 10.0;
+ final double var100 = deltaZ * var97 + 10.0;
+ final double var101 = deltaX * deltaX * deltaX * var98;
+ final double var102 = deltaY * deltaY * deltaY * var99;
+ final double var103 = deltaZ * deltaZ * deltaZ * var100;
+
+ final double var113 = var87 + var101 * (var88 - var87);
+ final double var114 = var93 + var101 * (var94 - var93);
+ final double var115 = var91 + var101 * (var92 - var91);
+ final double var116 = var89 + var101 * (var90 - var89);
+ final double var117 = var114 - var115;
+ final double var118 = var102 * (var116 - var113);
+ final double var119 = var102 * var117;
+ final double var120 = var113 + var118;
+ final double var121 = var115 + var119;
+ return var120 + (var103 * (var121 - var120));
+ // Gale end - C2ME - optimize noise generation - inline math & small optimization: remove frequent type conversions and redundant ops
}
private double sampleWithDerivative(int gridX, int gridY, int gridZ, double deltaX, double deltaY, double deltaZ, double[] noiseValues) {
diff --git a/net/minecraft/world/level/levelgen/synth/PerlinNoise.java b/net/minecraft/world/level/levelgen/synth/PerlinNoise.java
index da3c26fbad32d75d71f7e59c8c3341316a754756..797368070540d78981cfeef82f9820ae6ef4b676 100644
--- a/net/minecraft/world/level/levelgen/synth/PerlinNoise.java
+++ b/net/minecraft/world/level/levelgen/synth/PerlinNoise.java
@@ -26,6 +26,10 @@ public class PerlinNoise {
private final double lowestFreqValueFactor;
private final double lowestFreqInputFactor;
private final double maxValue;
+ // Gale start - C2ME - optimize noise generation
+ private final int octaveSamplersCount;
+ private final double [] amplitudesArray;
+ // Gale end - C2ME - optimize noise generation
@Deprecated
public static PerlinNoise createLegacyForBlendedNoise(RandomSource random, IntStream octaves) {
@@ -127,6 +131,10 @@ public class PerlinNoise {
this.lowestFreqInputFactor = Math.pow(2.0, -i);
this.lowestFreqValueFactor = Math.pow(2.0, size - 1) / (Math.pow(2.0, size) - 1.0);
this.maxValue = this.edgeValue(2.0);
+ // Gale start - C2ME - optimize noise generation
+ this.octaveSamplersCount = this.noiseLevels.length;
+ this.amplitudesArray = this.amplitudes.toDoubleArray();
+ // Gale end - C2ME - optimize noise generation
}
protected double maxValue() {
@@ -138,7 +146,27 @@ public class PerlinNoise {
}
public double getValue(double x, double y, double z) {
- return this.getValue(x, y, z, 0.0, 0.0, false);
+ // Gale start - C2ME - optimize noise generation - optimize for common cases
+ double d = 0.0;
+ double e = this.lowestFreqInputFactor;
+ double f = this.lowestFreqValueFactor;
+
+ for (int i = 0; i < this.octaveSamplersCount; ++i) {
+ ImprovedNoise perlinNoiseSampler = this.noiseLevels[i];
+ if (perlinNoiseSampler != null) {
+ @SuppressWarnings("deprecation")
+ double g = perlinNoiseSampler.noise(
+ wrap(x * e), wrap(y * e), wrap(z * e), 0.0, 0.0
+ );
+ d += this.amplitudesArray[i] * g * f;
+ }
+
+ e *= 2.0;
+ f /= 2.0;
+ }
+
+ return d;
+ // Gale end - C2ME - optimize noise generation - optimize for common cases
}
@Deprecated
@@ -187,7 +215,7 @@ public class PerlinNoise {
}
public static double wrap(double value) {
- return value - Mth.lfloor(value / 3.3554432E7 + 0.5) * 3.3554432E7;
+ return value - Math.floor(value / 3.3554432E7 + 0.5) * 3.3554432E7; // Gale - C2ME - optimize noise generation
}
protected int firstOctave() {
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