private float GenInterpolatedNoise(float x, float y)
{
int floorX = (x > 0) ? (int)x : (int)x - 1;
int floorY = (y > 0) ? (int)y : (int)y - 1;
float fractionalX = x - floorX;
float fractionalY = y - floorY;
float centerInter, bottomInter;
FastPerlinInterpolatedNoise2D noise;
Vector2 key = new Vector2(floorX, floorY);
calcLookup.TryGetValue(key, out noise);
if (noise == null)
{
noise = new FastPerlinInterpolatedNoise2D();
noise.center = GenSmoothNoise(floorX, floorY);
noise.bottom = GenSmoothNoise(floorX, floorY + 1);
noise.centerRight = GenSmoothNoise(floorX + 1, floorY);
noise.bottomRight = GenSmoothNoise(floorX + 1, floorY + 1);
calcLookup.Add(key, noise);
}
centerInter = GraphMath.LinearInterpolateFloat(noise.center, noise.centerRight, fractionalX);
bottomInter = GraphMath.LinearInterpolateFloat(noise.bottom, noise.bottomRight, fractionalX);
return(GraphMath.LinearInterpolateFloat(centerInter, bottomInter, fractionalY));
}
private float GenInterpolatedNoise(float x, float y, float z)
{
int floorX = (x > 0) ? (int)x : (int)x - 1;
int floorY = (y > 0) ? (int)y : (int)y - 1;
int floorZ = (z > 0) ? (int)z : (int)z - 1;
float fractionalX = x - floorX;
float fractionalY = y - floorY;
float fractionalZ = z - floorZ;
float centerInter, bottomInter, belowInter, aboveInter;
FastPerlinInterpolatedNoise3D noise;
Vector3 key = new Vector3(floorX, floorY, floorZ);
calcLookup.TryGetValue(key, out noise);
if (noise == null)
{
noise = new FastPerlinInterpolatedNoise3D();
noise.center = GenSmoothNoise(floorX, floorY, floorZ);
noise.bottom = GenSmoothNoise(floorX, floorY + 1, floorZ);
noise.centerRight = GenSmoothNoise(floorX + 1, floorY, floorZ);
noise.bottomRight = GenSmoothNoise(floorX + 1, floorY + 1, floorZ);
noise.centerAbove = GenSmoothNoise(floorX, floorY, floorZ + 1);
noise.bottomAbove = GenSmoothNoise(floorX, floorY + 1, floorZ + 1);
noise.centerRightAbove = GenSmoothNoise(floorX + 1, floorY, floorZ + 1);
noise.bottomRightAbove = GenSmoothNoise(floorX + 1, floorY + 1, floorZ + 1);
calcLookup.Add(key, noise);
}
centerInter = GraphMath.LinearInterpolateFloat(noise.center, noise.centerRight, fractionalX);
bottomInter = GraphMath.LinearInterpolateFloat(noise.bottom, noise.bottomRight, fractionalX);
belowInter = GraphMath.LinearInterpolateFloat(centerInter, bottomInter, fractionalY);
centerInter = GraphMath.LinearInterpolateFloat(noise.centerAbove, noise.centerRightAbove, fractionalX);
bottomInter = GraphMath.LinearInterpolateFloat(noise.bottomAbove, noise.bottomRightAbove, fractionalX);
aboveInter = GraphMath.LinearInterpolateFloat(centerInter, bottomInter, fractionalY);
return(GraphMath.LinearInterpolateFloat(belowInter, aboveInter, fractionalZ));
}