49 lines
1.9 KiB
C
49 lines
1.9 KiB
C
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/*
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* See Copyright Notice at the end of this file.
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*/
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class PerlinNoise {
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public:
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PerlinNoise( unsigned seed = 1 );
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double noise( double x ) const { return noise(x,0.0,0.0); }
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double noise( double x, double y ) const { return noise(x,y,0.0); }
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double noise( double x, double y, double z ) const;
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double octaveNoise( double x, int octaves ) const;
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double octaveNoise( double x, double y, int octaves ) const;
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double octaveNoise( double x, double y, double z, int octaves ) const;
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private:
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double fade( double t ) const { return t*t*t*(t*(t*6-15)+10); }
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double lerp( double t, double a, double b ) const { return a + t * (b - a); }
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double grad( int hash, double x, double y, double z ) const;
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int p[512];
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};
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/*
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The MIT License (MIT)
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Copyright (c) 2013 Reputeless
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Permission is hereby granted, free of charge, to any person obtaining a copy
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of this software and associated documentation files (the "Software"), to deal
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in the Software without restriction, including without limitation the rights
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to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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copies of the Software, and to permit persons to whom the Software is
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furnished to do so, subject to the following conditions:
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The above copyright notice and this permission notice shall be included in
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all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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THE SOFTWARE.
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*/
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