static public double GenInterpolatedNoise(double x, double y, double z, int seed)
{
int floorX = (x > 0) ? (int)x : (int)Math.Floor(x);
int floorY = (y > 0) ? (int)y : (int)Math.Floor(y);
int floorZ = (z > 0) ? (int)z : (int)Math.Floor(z);
double fractionalX = x - floorX;
double fractionalY = y - floorY;
double fractionalZ = z - floorZ;
double center, centerRight, bottom, bottomRight;
double centerAbove, centerRightAbove, bottomAbove, bottomRightAbove;
double centerInter, bottomInter, belowInter, aboveInter;
center = GenSmoothNoise(floorX, floorY, floorZ, seed);
bottom = GenSmoothNoise(floorX, floorY + 1, floorZ, seed);
centerRight = GenSmoothNoise(floorX + 1, floorY, floorZ, seed);
bottomRight = GenSmoothNoise(floorX + 1, floorY + 1, floorZ, seed);
centerAbove = GenSmoothNoise(floorX, floorY, floorZ + 1, seed);
bottomAbove = GenSmoothNoise(floorX, floorY + 1, floorZ + 1, seed);
centerRightAbove = GenSmoothNoise(floorX + 1, floorY, floorZ + 1, seed);
bottomRightAbove = GenSmoothNoise(floorX + 1, floorY + 1, floorZ + 1, seed);
centerInter = GraphMath.CosineInterpolate(center, centerRight, fractionalX);
bottomInter = GraphMath.CosineInterpolate(bottom, bottomRight, fractionalX);
belowInter = GraphMath.CosineInterpolate(centerInter, bottomInter, fractionalY);
centerInter = GraphMath.CosineInterpolate(centerAbove, centerRightAbove, fractionalX);
bottomInter = GraphMath.CosineInterpolate(bottomAbove, bottomRightAbove, fractionalX);
aboveInter = GraphMath.CosineInterpolate(centerInter, bottomInter, fractionalY);
return(GraphMath.CosineInterpolate(belowInter, aboveInter, fractionalZ));
}
static public double GenInterpolatedNoise(double x, double y, int seed)
{
int floorX = (int)x;
int floorY = (int)y;
double center, centerRight, bottom, bottomRight;
double centerInter, bottomInter;
center = GenSmoothNoise(floorX, floorY, seed);
centerRight = GenSmoothNoise(floorX + 1, floorY, seed);
bottom = GenSmoothNoise(floorX, floorY + 1, seed);
bottomRight = GenSmoothNoise(floorX + 1, floorY + 1, seed);
centerInter = GraphMath.CosineInterpolate(center, centerRight, floorX - x); //Interpolates the two
bottomInter = GraphMath.CosineInterpolate(bottom, bottomRight, floorX - x); // Horizontal parts.
return(GraphMath.CosineInterpolate(centerInter, bottomInter, y - floorY)); //Interpolatse the interpolated
//Horizontal parts vertically
}