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minor sdf opts

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This commit is contained in:
Zoë Gidiere
2023-10-05 21:43:50 -06:00
parent 8fba3f9e60
commit 4983e559b3
1 changed files with 20 additions and 7 deletions
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27
common/addons/config-noise-function/src/main/java/com/dfsek/terra/addons/noise/samplers/noise/PseudoErosionSampler.java
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@@ -311,20 +311,33 @@ public class PseudoErosionSampler implements NoiseSampler {
double x1dx = x - x1;
double y1dx = y - y1;
if(x1 == x2 && y1 == y2) // If positions are the same just return distance from point
return fastSqrt(pow2(x1dx) + pow2(y1dx));
double x1dxSquared = pow2(x1dx);
double y1dxSquared = pow2(y1dx);
if (x1 == x2 && y1 == y2) {
// If positions are the same, just return the distance from the point
return fastSqrt(x1dxSquared + y1dxSquared);
}
double ldx = x1 - x2;
double ldy = y1 - y2;
double ldxSquared = pow2(ldx);
double ldySquared = pow2(ldy);
double x2dx = x - x2;
double y2dx = y - y2;
double lt = (ldy * y1dx + ldx * x1dx) / (pow2(ldy) + pow2(ldx)); // Position along line
if(lt > 0) {
return fastSqrt(pow2(x1dx) + pow2(y1dx)); // Distance between point 1 and position
} else if(lt < -1) {
double dotProduct = ldy * y1dx + ldx * x1dx;
double lt = dotProduct / (ldySquared + ldxSquared); // Position along the line
if (lt > 0) {
return fastSqrt(x1dxSquared + y1dxSquared); // Distance between point 1 and position
} else if (lt < -1) {
return fastSqrt(pow2(x2dx) + pow2(y2dx)); // Distance between point 2 and position
} else {
return fastAbs((ldy * x1dx - ldx * y1dx) / fastSqrt(pow2(ldx) + pow2(ldy))); // Distance from line
double distance = (ldy * x1dx - ldx * y1dx) / fastSqrt(ldxSquared + ldySquared);
return fastAbs(distance); // Distance from the line
}
}