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Make seed affect pseudoerosion hasing

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This commit is contained in:
Zoe Gidiere
2024-09-23 20:51:00 -06:00
parent 10d723372d
commit f469193909
1 changed files with 9 additions and 18 deletions
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common/addons/config-noise-function/src/main/java/com/dfsek/terra/addons/noise/samplers/noise/PseudoErosionSampler.java
+9 -18
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@@ -47,22 +47,14 @@ public class PseudoErosionSampler extends NoiseFunction {
this.maxCellDistSqRecip = 1 / maxCellDistSq; this.maxCellDistSqRecip = 1 / maxCellDistSq;
} }
public static float hash(float x, float y) { public static float hashX(float seed, float n) {
float xx = x * HASH_X + HASH_Y;
float yy = y * HASH_Y + HASH_X;
// Swapped the components here // Swapped the components here
return 16 * (xx * yy * (xx + yy)); float nx = HASH_X * n * seed;
}
public static float hashX(float n) {
// Swapped the components here
float nx = HASH_X * n;
return -1.0f + 2.0f * fract(nx); return -1.0f + 2.0f * fract(nx);
} }
public static float hashY(float n) { public static float hashY(float seed, float n) {
float ny = HASH_Y * n; float ny = HASH_Y * n * seed;
return -1.0f + 2.0f * fract(ny); return -1.0f + 2.0f * fract(ny);
} }
@@ -70,7 +62,7 @@ public class PseudoErosionSampler extends NoiseFunction {
return (x - (float)Math.floor(x)); return (x - (float)Math.floor(x));
} }
public float[] erosion(float x, float y, float dirX, float dirY) { public float[] erosion(int seed, float x, float y, float dirX, float dirY) {
int gridX = Math.round(x); int gridX = Math.round(x);
int gridY = Math.round(y); int gridY = Math.round(y);
float noise = 0.0f; float noise = 0.0f;
@@ -80,10 +72,9 @@ public class PseudoErosionSampler extends NoiseFunction {
for (int cellX = gridX - 1; cellX <= gridX + 1; cellX++) { for (int cellX = gridX - 1; cellX <= gridX + 1; cellX++) {
for (int cellY = gridY - 1; cellY <= gridY + 1; cellY++) { for (int cellY = gridY - 1; cellY <= gridY + 1; cellY++) {
// TODO - Make seed affect hashing float cellHash = hash(seed, cellX, cellY);
float cellHash = hash(cellX, cellY); float cellOffsetX = (float) (hashX(seed, cellHash) * jitter);
float cellOffsetX = (float) (hashX(cellHash) * jitter); float cellOffsetY = (float) (hashY(seed, cellHash) * jitter);
float cellOffsetY = (float) (hashY(cellHash) * jitter);
float cellOriginDeltaX = (x - cellX) + cellOffsetX; float cellOriginDeltaX = (x - cellX) + cellOffsetX;
float cellOriginDeltaY = (y - cellY) + cellOffsetY; float cellOriginDeltaY = (y - cellY) + cellOffsetY;
float cellOriginDistSq = cellOriginDeltaX * cellOriginDeltaX + cellOriginDeltaY * cellOriginDeltaY; float cellOriginDistSq = cellOriginDeltaX * cellOriginDeltaX + cellOriginDeltaY * cellOriginDeltaY;
@@ -135,7 +126,7 @@ public class PseudoErosionSampler extends NoiseFunction {
// Stack erosion octaves // Stack erosion octaves
for (int i = 0; i < octaves; i++) { for (int i = 0; i < octaves; i++) {
float[] erosionResult = erosion( float[] erosionResult = erosion((int) seed,
x * freq * (float) erosionFrequency, x * freq * (float) erosionFrequency,
y * freq * (float) erosionFrequency, y * freq * (float) erosionFrequency,
baseDirX + dirY * (float) branchStrength, baseDirX + dirY * (float) branchStrength,