cloudy-raytracer/common/noise/worleynoise.h

#ifndef CG1_TRACER_WORLEYNOISE_H
#define CG1_TRACER_WORLEYNOISE_H


#include <random>
#include "common/vector3d.h"
#include "noise.h"

// Based on: https://www.youtube.com/watch?v=4QOcCGI6xOU
class WorleyNoise : public Noise
{
public:
    /**
     *
     * @param size
     * @param numberOfPoints
     * @param seed 0 for random seed
     */
    WorleyNoise(int size, int numberOfPoints, unsigned int seed = 0);

    void renderNoiseThread(int xOffset, int xSize);

protected:
    int numberOfPoints;
    std::vector<Vector3d> points;   // 3D-Array, each cell represents a subcell. There are numberOfPoints^3 subcells.

    std::uniform_real_distribution<float> distribution;
    std::mt19937 generator;

    Vector3d getRandomPoint();

    float distanceToClosestPoint(Vector3d point);

    void generateNoise();

    std::vector<Vector3d> getSubcellPoints(Vector3d point);

    static void runWorleyNoiseInThread(int xOffset, int xSize, WorleyNoise *noise);
};


#endif //CG1_TRACER_WORLEYNOISE_H