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PerlinNoise.h
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1/*
2 * This program source code file is part of KiCad, a free EDA CAD application.
3 *
4 * Copyright (C) 2016 Mario Luzeiro <[email protected]>
5 * Copyright (C) 2016-2021 KiCad Developers, see AUTHORS.txt for contributors.
6 *
7 * This program is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU General Public License
9 * as published by the Free Software Foundation; either version 2
10 * of the License, or (at your option) any later version.
11 *
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
16 *
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, you may find one here:
19 * http://www.gnu.org/licenses/old-licenses/gpl-2.0.html
20 * or you may search the http://www.gnu.org website for the version 2 license,
21 * or you may write to the Free Software Foundation, Inc.,
22 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
23 */
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{
57public:
62
66 PerlinNoise( unsigned int seed );
67
68 // Returns between 0.0f and 1.0f
69 float noise( float x, float y, float z ) const;
70 float noise( float x, float y ) const;
71
72private:
73 float fade( float t ) const;
74 float lerp( float t, float a, float b ) const;
75 float grad( int hash, float x, float y, float z ) const;
76 float grad( int hash, float x, float y ) const;
77
78 // The permutation vector
79 std::vector<int> p;
80};
81
82#endif
float lerp(float t, float a, float b) const
PerlinNoise()
Initialize with the reference values for the permutation vector.
Definition: PerlinNoise.cpp:55
float grad(int hash, float x, float y, float z) const
std::vector< int > p
Definition: PerlinNoise.h:79
float noise(float x, float y, float z) const
float fade(float t) const