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minor perf improvements

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This commit is contained in:
dfsek
2021-01-13 14:03:52 -07:00
parent 54f732176d
commit d1c018690d
7 changed files with 40 additions and 52 deletions
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common/src/main/java/com/dfsek/terra/api/math/noise/samplers/FastNoiseLite.java
+13 -14
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@@ -1616,30 +1616,29 @@ public class FastNoiseLite implements NoiseSampler {
return lerp(xf0, xf1, ys) * 1.4247691104677813f;
}
private static long hash(long in) {
in = (in + 0x7ed55d16) + (in << 12);
in = (in ^ 0xc761c23c) ^ (in >> 19);
in = (in + 0x165667b1) + (in << 5);
in = (in + 0xd3a2646c) ^ (in << 9);
in = (in + 0xfd7046c5) + (in << 3);
in = (in ^ 0xb55a4f09) ^ (in >> 16);
return in;
long murmur64(long h) {
h ^= h >>> 33;
h *= 0xff51afd7ed558ccdL;
h ^= h >>> 33;
h *= 0xc4ceb9fe1a85ec53L;
h ^= h >>> 33;
return h;
}
private double singleWhiteNoise(int seed, double x, double y, double z) {
long hashX = hash(Double.doubleToRawLongBits(x) ^ seed);
long hashZ = hash(Double.doubleToRawLongBits(y) ^ seed);
long hashX = murmur64(Double.doubleToRawLongBits(x) ^ seed);
long hashZ = murmur64(Double.doubleToRawLongBits(y) ^ seed);
long hash = (((hashX ^ (hashX >>> 32)) + ((hashZ ^ (hashZ >>> 32)) << 32)) ^ seed) + Double.doubleToRawLongBits(z);
long base = ((hash(hash)) & 0x000fffffffffffffL)
long base = ((murmur64(hash)) & 0x000fffffffffffffL)
+ POSITIVE_POW1; // Sign and exponent
return (Double.longBitsToDouble(base) - 1.5) * 2;
}
private double singleWhiteNoise(int seed, double x, double y) {
long hashX = hash(Double.doubleToRawLongBits(x) ^ seed);
long hashZ = hash(Double.doubleToRawLongBits(y) ^ seed);
long hashX = murmur64(Double.doubleToRawLongBits(x) ^ seed);
long hashZ = murmur64(Double.doubleToRawLongBits(y) ^ seed);
long hash = ((hashX ^ (hashX >>> 32)) + ((hashZ ^ (hashZ >>> 32)) << 32)) ^ seed;
long base = (hash(hash) & 0x000fffffffffffffL)
long base = (murmur64(hash) & 0x000fffffffffffffL)
+ POSITIVE_POW1; // Sign and exponent
return (Double.longBitsToDouble(base) - 1.5) * 2;
}