Perlin.hpp

#include "utils/Color.hpp"
#include "utils/VecN.hpp"
 
#ifndef __PERLIN_HPP__
    #define __PERLIN_HPP__
 
namespace Raytracer::Utils
{
    class Perlin {
      private:
        static constexpr int pointCount = 256;
        Utils::Vec3 *_randVec;
        int *_permX;
        int *_permY;
        int *_permZ;
 
      public:
        Perlin();
        ~Perlin();
        double noise(const Utils::Point3 &point) const;
        double turbulence(const Utils::Point3 &point, int depth = 7) const;
        static int *perlinGeneratePerm();
        static void permute(int *perm, int n);
        static double perlinInterp(
            const Utils::Vec3 c[2][2][2], double u, double v, double w);
    };
} // namespace Raytracer::Utils
 
#endif /* __PERLIN_HPP__ */