KiCad PCB EDA Suite
PerlinNoise.h
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24 
43 #include <vector>
44 
45 // THIS CLASS IS A TRANSLATION TO C++11 FROM THE REFERENCE
46 // JAVA IMPLEMENTATION OF THE IMPROVED PERLIN FUNCTION (see http://mrl.nyu.edu/~perlin/noise/)
47 // THE ORIGINAL JAVA IMPLEMENTATION IS COPYRIGHT 2002 KEN PERLIN
48 
49 // I ADDED AN EXTRA METHOD THAT GENERATES A NEW PERMUTATION VECTOR
50 // (THIS IS NOT PRESENT IN THE ORIGINAL IMPLEMENTATION)
51 
52 #ifndef PERLINNOISE_H
53 #define PERLINNOISE_H
54 
56 {
57  // The permutation vector
58  std::vector<int> p;
59 
60 public:
61  // Initialize with the reference values for the permutation vector
62  PerlinNoise();
63 
64  // Generate a new permutation vector based on the value of seed
65  PerlinNoise( unsigned int seed );
66 
67  // Returns between 0.0f and 1.0f
68  float noise( float x, float y, float z ) const;
69  float noise( float x, float y ) const;
70 
71 private:
72  float fade( float t ) const;
73  float lerp( float t, float a, float b ) const;
74  float grad( int hash, float x, float y, float z ) const;
75  float grad( int hash, float x, float y ) const;
76 };
77 
78 #endif
std::vector< int > p
Definition: PerlinNoise.h:58
float grad(int hash, float x, float y, float z) const
float fade(float t) const
float lerp(float t, float a, float b) const
float noise(float x, float y, float z) const