| Interface | Description | 
|---|---|
| Fractal | 
 Interface for a general fractal basis. 
 | 
| Class | Description | 
|---|---|
| FractalSum | 
 FractalSum is the simplest form of fractal functions summing up a few octaves
 of the noise value with an ever decreasing roughness (0 to 1) amplitude
 
 lacunarity = 2.0f is the classical octave distance
 
 Note: though noise basis functions are generally designed to return value
 between -1..1, there sum can easily be made to extend out of this range. 
 |