55 lines
2.3 KiB
C++
55 lines
2.3 KiB
C++
/**
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* @file SimplexNoise.h
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* @brief A Perlin Simplex Noise C++ Implementation (1D, 2D, 3D).
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*
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* Copyright (c) 2014-2018 Sebastien Rombauts (sebastien.rombauts@gmail.com)
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*
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* Distributed under the MIT License (MIT) (See accompanying file LICENSE.txt
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* or copy at http://opensource.org/licenses/MIT)
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*/
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#pragma once
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#include <cstddef> // size_t
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/**
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* @brief A Perlin Simplex Noise C++ Implementation (1D, 2D, 3D, 4D).
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*/
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class SimplexNoise {
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public:
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// 1D Perlin simplex noise
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static float noise(float x);
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// 2D Perlin simplex noise
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static float noise(float x, float y);
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// 3D Perlin simplex noise
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static float noise(float x, float y, float z);
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// Fractal/Fractional Brownian Motion (fBm) noise summation
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float fractal(size_t octaves, float x) const;
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float fractal(size_t octaves, float x, float y) const;
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float fractal(size_t octaves, float x, float y, float z) const;
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/**
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* Constructor of to initialize a fractal noise summation
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*
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* @param[in] frequency Frequency ("width") of the first octave of noise (default to 1.0)
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* @param[in] amplitude Amplitude ("height") of the first octave of noise (default to 1.0)
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* @param[in] lacunarity Lacunarity specifies the frequency multiplier between successive octaves (default to 2.0).
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* @param[in] persistence Persistence is the loss of amplitude between successive octaves (usually 1/lacunarity)
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*/
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explicit SimplexNoise(float frequency = 1.0f,
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float amplitude = 1.0f,
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float lacunarity = 2.0f,
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float persistence = 0.5f) :
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mFrequency(frequency),
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mAmplitude(amplitude),
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mLacunarity(lacunarity),
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mPersistence(persistence) {
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}
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private:
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// Parameters of Fractional Brownian Motion (fBm) : sum of N "octaves" of noise
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float mFrequency; ///< Frequency ("width") of the first octave of noise (default to 1.0)
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float mAmplitude; ///< Amplitude ("height") of the first octave of noise (default to 1.0)
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float mLacunarity; ///< Lacunarity specifies the frequency multiplier between successive octaves (default to 2.0).
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float mPersistence; ///< Persistence is the loss of amplitude between successive octaves (usually 1/lacunarity)
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}; |