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Yatopia/patches/server/0048-lithium-NoiseChunkGeneratorMixin.patch
toinouH f49c1294e9 Updated licence for CaffeineMC
2021-02-08 16:55:54 +01:00

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From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: JellySquid <jellysquid+atwork@protonmail.com>
Date: Fri, 23 Oct 2020 16:45:51 -0500
Subject: [PATCH] lithium NoiseChunkGeneratorMixin
Additional Optimizations By YatopiaMC,
Original code by SuperCoder79, licensed under LGPLv3
you can find the original code on https://github.com/CaffeineMC/lithium-fabric/ (Yarn mappings)
diff --git a/src/main/java/net/minecraft/server/ChunkGeneratorAbstract.java b/src/main/java/net/minecraft/server/ChunkGeneratorAbstract.java
index 321ebe8891defb46f3ad3dfea37c9bb6e2025ad7..fa60285c0c48147ad09b9197bfe577f504dd34bd 100644
--- a/src/main/java/net/minecraft/server/ChunkGeneratorAbstract.java
+++ b/src/main/java/net/minecraft/server/ChunkGeneratorAbstract.java
@@ -5,6 +5,8 @@ import com.mojang.serialization.codecs.RecordCodecBuilder;
import it.unimi.dsi.fastutil.objects.ObjectArrayList;
import it.unimi.dsi.fastutil.objects.ObjectList;
import it.unimi.dsi.fastutil.objects.ObjectListIterator;
+import org.apache.commons.math3.util.FastMath; // Yatopia Fast Math
+
import java.util.Iterator;
import java.util.List;
import java.util.Random;
@@ -111,7 +113,15 @@ public final class ChunkGeneratorAbstract extends ChunkGenerator {
return this.w == i && ((GeneratorSettingBase) this.h.get()).a(resourcekey);
}
+ // Yatopia start
+ private static double sampleOctave(NoiseGeneratorPerlin sampler, double x, double y, double z, double scaledVerticalSize, double scaledY, double frequency) {
+ return sampler.sample(x, y, z, scaledVerticalSize, scaledY) / frequency;
+ }
+ // Yatopia end
+
private double a(int i, int j, int k, double d0, double d1, double d2, double d3) {
+ // Yatopia start - replaced logic
+ /*
double d4 = 0.0D;
double d5 = 0.0D;
double d6 = 0.0D;
@@ -147,7 +157,85 @@ public final class ChunkGeneratorAbstract extends ChunkGenerator {
}
return MathHelper.b(d4 / 512.0D, d5 / 512.0D, (d6 / 10.0D + 1.0D) / 2.0D);
+ */
+ double frequency = 1.0;
+ double interpolationValue = 0.0;
+
+ // Calculate interpolation data to decide what noise to sample.
+ for (int octave = 0; octave < 8; octave++) {
+ double scaledVerticalScale = d3 * frequency;
+ double scaledY = j * scaledVerticalScale;
+
+ interpolationValue += sampleOctave(this.s.a(octave),
+ NoiseGeneratorOctaves.a(i * d2 * frequency),
+ NoiseGeneratorOctaves.a(scaledY),
+ NoiseGeneratorOctaves.a(k * d2 * frequency), scaledVerticalScale, scaledY, frequency);
+
+ frequency /= 2.0;
+ }
+
+ double clampedInterpolation = (interpolationValue / 10.0 + 1.0) / 2.0;
+
+ if (clampedInterpolation >= 1) {
+ // Sample only upper noise, as the lower noise will be interpolated out.
+ frequency = 1.0;
+ double noise = 0.0;
+ for (int octave = 0; octave < 16; octave++) {
+ double scaledVerticalScale = d1 * frequency;
+ double scaledY = j * scaledVerticalScale;
+
+ noise += sampleOctave(this.r.a(octave),
+ NoiseGeneratorOctaves.a(i * d0 * frequency),
+ NoiseGeneratorOctaves.a(scaledY),
+ NoiseGeneratorOctaves.a(k * d0 * frequency), scaledVerticalScale, scaledY, frequency);
+
+ frequency /= 2.0;
+ }
+
+ return noise / 512.0;
+ } else if (clampedInterpolation <= 0) {
+ // Sample only lower noise, as the upper noise will be interpolated out.
+ frequency = 1.0;
+ double noise = 0.0;
+ for (int octave = 0; octave < 16; octave++) {
+ double scaledVerticalScale = d1 * frequency;
+ double scaledY = j * scaledVerticalScale;
+ noise += sampleOctave(this.q.a(octave),
+ NoiseGeneratorOctaves.a(i * d0 * frequency),
+ NoiseGeneratorOctaves.a(scaledY),
+ NoiseGeneratorOctaves.a(k * d0 * frequency), scaledVerticalScale, scaledY, frequency);
+
+ frequency /= 2.0;
+ }
+
+ return noise / 512.0;
+ } else {
+ // [VanillaCopy] SurfaceChunkGenerator#sampleNoise
+ // Sample both and interpolate, as in vanilla.
+
+ frequency = 1.0;
+ double lowerNoise = 0.0;
+ double upperNoise = 0.0;
+
+ for (int octave = 0; octave < 16; octave++) {
+ // Pre calculate these values to share them
+ double scaledVerticalScale = d1 * frequency;
+ double scaledY = j * scaledVerticalScale;
+ double xVal = NoiseGeneratorOctaves.a(i * d0 * frequency);
+ double yVal = NoiseGeneratorOctaves.a(scaledY);
+ double zVal = NoiseGeneratorOctaves.a(k * d0 * frequency);
+
+ upperNoise += sampleOctave(this.r.a(octave), xVal, yVal, zVal, scaledVerticalScale, scaledY, frequency);
+ lowerNoise += sampleOctave(this.q.a(octave), xVal, yVal, zVal, scaledVerticalScale, scaledY, frequency);
+
+ frequency /= 2.0;
+ }
+
+ // Vanilla behavior, return interpolated noise
+ return MathHelper.d(clampedInterpolation, lowerNoise / 512.0, upperNoise / 512.0);
+ }
}
+ // Yatopia end
private double[] b(int i, int j) {
double[] adouble = new double[this.o + 1];
@@ -273,7 +361,7 @@ public final class ChunkGeneratorAbstract extends ChunkGenerator {
double d2 = d1 * 24.575625D - 2.0D;
- return d2 < 0.0D ? d2 * 0.009486607142857142D : Math.min(d2, 1.0D) * 0.006640625D;
+ return d2 < 0.0D ? d2 * 0.009486607142857142D : FastMath.min(d2, 1.0D) * 0.006640625D; // Yatopia Fast Math
}
@Override
@@ -290,10 +378,10 @@ public final class ChunkGeneratorAbstract extends ChunkGenerator {
}
private int a(int i, int j, @Nullable IBlockData[] aiblockdata, @Nullable Predicate<IBlockData> predicate) {
- int k = Math.floorDiv(i, this.m);
- int l = Math.floorDiv(j, this.m);
- int i1 = Math.floorMod(i, this.m);
- int j1 = Math.floorMod(j, this.m);
+ int k = FastMath.floorDiv(i, this.m); // Yatopia Fast Math
+ int l = FastMath.floorDiv(j, this.m); // Yatopia Fast Math
+ int i1 = FastMath.floorMod(i, this.m); // Yatopia Fast Math
+ int j1 = FastMath.floorMod(j, this.m); // Yatopia Fast Math
double d0 = (double) i1 / (double) this.m;
double d1 = (double) j1 / (double) this.m;
double[][] adouble = new double[][]{this.b(k, l), this.b(k, l + 1), this.b(k + 1, l), this.b(k + 1, l + 1)};
@@ -532,9 +620,9 @@ public final class ChunkGeneratorAbstract extends ChunkGenerator {
StructurePiece structurepiece = (StructurePiece) objectlistiterator.next();
StructureBoundingBox structureboundingbox = structurepiece.g();
- k4 = Math.max(0, Math.max(structureboundingbox.a - j3, j3 - structureboundingbox.d));
+ k4 = FastMath.max(0, FastMath.max(structureboundingbox.a - j3, j3 - structureboundingbox.d)); // Yatopia Fast Math
l4 = j2 - (structureboundingbox.b + (structurepiece instanceof WorldGenFeaturePillagerOutpostPoolPiece ? ((WorldGenFeaturePillagerOutpostPoolPiece) structurepiece).d() : 0));
- i5 = Math.max(0, Math.max(structureboundingbox.c - i4, i4 - structureboundingbox.f));
+ i5 = FastMath.max(0, FastMath.max(structureboundingbox.c - i4, i4 - structureboundingbox.f)); // Yatopia Fast Math
}
objectlistiterator.back(objectlist.size());
@@ -589,7 +677,7 @@ public final class ChunkGeneratorAbstract extends ChunkGenerator {
double d0 = (double) (i * i + k * k);
double d1 = (double) j + 0.5D;
double d2 = d1 * d1;
- double d3 = Math.pow(2.718281828459045D, -(d2 / 16.0D + d0 / 16.0D));
+ double d3 = FastMath.pow(2.718281828459045D, -(d2 / 16.0D + d0 / 16.0D)); // Yatopia Fast Math
double d4 = -d1 * MathHelper.i(d2 / 2.0D + d0 / 2.0D) / 2.0D;
return d4 * d3;
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