cloudy-raytracer/common/noise/cloudnoise.cpp

#include "cloudnoise.h"
#include "worleynoise.h"
#include "perlinnoise.h"

CloudNoise::CloudNoise(int size) : Noise(size)
{
    int minSize = std::min(32, size);

    // Some worley noises
    WorleyNoise worleyNoise1(minSize, 3);
    WorleyNoise worleyNoise3(size, 15);

    // Some perlin noises
    PerlinNoise perlinNoise1(minSize, 3);
    PerlinNoise perlinNoise2(size, 15);

    // Generate the noise
    for (int x = 0; x < size; x++)
    {
        for (int y = 0; y < size; y++)
        {
            for (int z = 0; z < size; z++)
            {
                float sx = x / (float) size;
                float sy = y / (float) size;
                float sz = z / (float) size;

                float worley1 = worleyNoise1.getNoise(sx, sy, sz);
                float worley3 = worleyNoise3.getNoise(sx, sy, sz);

                float perlin1 = perlinNoise1.getNoise(sx, sy, sz);
                float perlin2 = perlinNoise2.getNoise(sx, sy, sz);

                float noise = worley1 * 0.4f + worley3 * 0.12f + perlin1 * 0.36f + perlin2 * 0.12;

                setNoise(x, y, z, noise);
            }
        }
    }
}