30 lines
942 B
C++
30 lines
942 B
C++
/**
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* Perlin Noise implementation for the ground (header file)
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**/
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#pragma once
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#include "Implicit.hpp"
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#include <cmath>
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#include <random>
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#include <vector>
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#include <algorithm>
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class PerlinNoise : public ImplicitSurface {
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std::vector<int> p;
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public:
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PerlinNoise();
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PerlinNoise(unsigned int seed);
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double operator() (double _x, double _y, double _z) const;
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double noise(double x, double y) const;
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Point normal_vector(double x, double y);
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double fBm(double x, double y, double z, int octaves, double
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lacunarity, double gain) const;
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virtual Point location_hint() const;
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Point location_hint(double x, double z) const;
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private:
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double noise(double x, double y, double z) const;
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double fade(double t) const;
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double lerp(double t, double a, double b) const;
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double grad(int hash, double x, double y, double z) const;
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};
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