28 lines
908 B
C++
28 lines
908 B
C++
#include <vector>
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// THIS CLASS IS A TRANSLATION TO C++11 FROM THE REFERENCE
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// JAVA IMPLEMENTATION OF THE IMPROVED PERLIN FUNCTION (see http://mrl.nyu.edu/~perlin/noise/)
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// THE ORIGINAL JAVA IMPLEMENTATION IS COPYRIGHT 2002 KEN PERLIN
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// I ADDED AN EXTRA METHOD THAT GENERATES A NEW PERMUTATION VECTOR (THIS IS NOT PRESENT IN THE ORIGINAL IMPLEMENTATION)
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#ifndef PERLINNOISE_H
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#define PERLINNOISE_H
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class PerlinNoise {
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// The permutation vector
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std::vector<int> p;
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public:
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// Initialize with the reference values for the permutation vector
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PerlinNoise();
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// Generate a new permutation vector based on the value of seed
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PerlinNoise(unsigned int seed);
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// Get a noise value, for 2D images z can have any value
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double noise(double x, double y, double z);
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private:
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double fade(double t);
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double lerp(double t, double a, double b);
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double grad(int hash, double x, double y, double z);
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};
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#endif
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