// Copyright (C) 2015 Rémi Bèges
// This file is part of the "Nazara Engine - Noise module"
// For conditions of distribution and use, see copyright notice in Config.hpp

#pragma once

#ifndef SIMPLEX4D_HPP
#define SIMPLEX4D_HPP

#include <Nazara/Prerequesites.hpp>
#include <Nazara/Noise/NoiseBase.hpp>
#include <Nazara/Noise/Abstract4DNoise.hpp>
#include <Nazara/Math/Vector4.hpp>

namespace Nz
{
	class NAZARA_NOISE_API Simplex4D : public Abstract4DNoise
	{
		public:
			Simplex4D();
			Simplex4D(unsigned int seed);
			~Simplex4D() = default;

			float GetValue(float x, float y, float z, float w, float resolution);

		private:
			int ii,jj,kk,ll;
			int gi0,gi1,gi2,gi3,gi4;
			Vector4i skewedCubeOrigin,off1,off2,off3;
			int lookupTable4D[64][4];
			int c;
			float n1,n2,n3,n4,n5;
			float c1,c2,c3,c4,c5,c6;
			float gradient4[32][4];
			float UnskewCoeff4D;
			float SkewCoeff4D;
			float sum;
			Vector4<float> unskewedCubeOrigin, unskewedDistToOrigin;
			Vector4<float> d1,d2,d3,d4,d5;
	};
}

#endif // SIMPLEX4D_H