Fractal Open Simplex Noise To Mat

Introduction

• Generates an openCV mat using Open Simplex noise with multiple octaves
• Uses the excellent implementation of open simplex noise is found here

Code

public static Mat GetFractalOpenSimplexNoise(int width, int height, float initialFrequency, int numOctaves, float Lacunarity, float persistence)
{
    Mat mat = GetOpenSimplexNoise(width, height, initialFrequency);

    for (int i = 1; i < numOctaves; i++)
    {
        initialFrequency *= Lacunarity;

        Mat temp = GetOpenSimplexNoise(width, height, initialFrequency);

        double alpha = 1 / (persistence + 1);
        double beta = 1 - alpha;
        CvInvoke.AddWeighted(mat, alpha, temp, beta, 0, mat);

        persistence *= persistence;
    }

    return mat;
}

Usage

static void Main(string[] args)
{
    Mat mat = GetFractalOpenSimplexNoise(500, 500, 1 / 32f, 3, 2, 0.5f);
    CvInvoke.Imshow("test", mat);
    CvInvoke.WaitKey(0);
}

Output