Method fractalXYZ

Source/Utils/SimplexNoise.cpp:461–476

* Fractal/Fractional Brownian Motion (fBm) summation of 3D Perlin Simplex noise * * @param[in] octaves number of fraction of noise to sum * @param[in] x x float coordinate * @param[in] y y float coordinate * @param[in] z z float coordinate * * @return Noise value in the range[-1; 1], value of 0 on all integer coordinates. */

 * @return Noise value in the range[-1; 1], value of 0 on all integer coordinates.
 */
float SimplexNoise::fractalXYZ(size_t octaves, float x, float y, float z) {
    float output = 0.f;
    float denom  = 0.f;
    float frequency = mFrequency;
    float amplitude = mAmplitude;

    for (size_t i = 0; i < octaves; i++) {
        output += (amplitude * noiseXYZ(x * frequency, y * frequency, z * frequency));
        denom += amplitude;

        frequency *= mLacunarity;
        amplitude *= mPersistence;
    }

    return (output / denom);
}

std::vector<std::vector<float>> SimplexNoise::create(size_t pWidth, size_t pHeight, size_t pOctaves) {