67 lines
1.6 KiB
C++
67 lines
1.6 KiB
C++
/* Copyright (C) 2009 Wildfire Games.
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* This file is part of 0 A.D.
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*
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* 0 A.D. is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 2 of the License, or
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* (at your option) any later version.
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*
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* 0 A.D. 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 0 A.D. If not, see <http://www.gnu.org/licenses/>.
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*/
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/*
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* 2D and 3D seamless Perlin noise
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*/
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// Based on http://www.cs.cmu.edu/~mzucker/code/perlin-noise-math-faq.html
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// and http://mrl.nyu.edu/~perlin/paper445.pdf.
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// Not optimized for speed yet.
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#ifndef INCLUDED_NOISE
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#define INCLUDED_NOISE
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#include "Vector2D.h"
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#include "Vector3D.h"
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#include "MathUtil.h"
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class Noise2D
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{
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/// Frequency in X and Y
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int freq;
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/// freq*freq random gradient vectors in the unit cube
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CVector2D_Maths** grads;
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public:
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Noise2D(int freq);
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~Noise2D();
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/// Evaluate the noise function at a given point
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float operator() (float x, float y);
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};
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class Noise3D
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{
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/// Frequency in X and Y
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int freq;
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/// Frequency in Z (vertical frequency)
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int vfreq;
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/// freq*freq*vfreq random gradient vectors in the unit cube
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CVector3D*** grads;
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public:
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Noise3D(int freq, int vfreq);
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~Noise3D();
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/// Evaluate the noise function at a given point
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float operator() (float x, float y, float z);
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};
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#endif
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