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83 lines
2.7 KiB
C++
83 lines
2.7 KiB
C++
/*
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* This program source code file is part of KiCad, a free EDA CAD application.
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*
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* Copyright (C) 2016 Mario Luzeiro <mrluzeiro@ua.pt>
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* Copyright (C) 2016-2021 KiCad Developers, see AUTHORS.txt for contributors.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, you may find one here:
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* http://www.gnu.org/licenses/old-licenses/gpl-2.0.html
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* or you may search the http://www.gnu.org website for the version 2 license,
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* or you may write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
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*/
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/**
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* @file PerlinNoise.h
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* @brief This source code comes from the project:
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* https://github.com/sol-prog/Perlin_Noise
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*
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* It was changed to work with floats instead of doubles
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*
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* Original copyright notice:
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*
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* Perlin_Noise
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* "Here you could find the code for "Perlin noise in C++11",
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* for more information visit the project webpage:
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* http://solarianprogrammer.com/2012/07/18/perlin-noise-cpp-11/
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* You could use this program under the terms of GPL v3, for more details see:
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* http://www.gnu.org/copyleft/gpl.html
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* Copyright 2012 Sol from www.solarianprogrammer.com"
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*/
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#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
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// (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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{
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public:
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/**
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* Initialize with the reference values for the permutation vector.
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*/
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PerlinNoise();
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/**
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* Generate a new permutation vector based on the value of seed.
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*/
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PerlinNoise( unsigned int seed );
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// Returns between 0.0f and 1.0f
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float noise( float x, float y, float z ) const;
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float noise( float x, float y ) const;
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private:
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float fade( float t ) const;
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float lerp( float t, float a, float b ) const;
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float grad( int hash, float x, float y, float z ) const;
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float grad( int hash, float x, float y ) const;
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// The permutation vector
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std::vector<int> p;
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};
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#endif
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