libcruft-util/noise/fractal.hpp

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/*
* This file is part of libgim.
*
* libgim is free software: you can redistribute it and/or modify it under the
* terms of the GNU General Public License as published by the Free Software
* Foundation, either version 3 of the License, or (at your option) any later
* version.
*
* libgim is distributed in the hope that it will be useful, but WITHOUT ANY
* WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
* FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
* details.
*
* You should have received a copy of the GNU General Public License
* along with libgim. If not, see <http://www.gnu.org/licenses/>.
*
* Copyright 2012 Danny Robson <danny@nerdcruft.net>
*/
#ifndef __UTIL_NOISE_FRACTAL_HPP
#define __UTIL_NOISE_FRACTAL_HPP
#include "basis.hpp"
namespace util {
namespace noise {
struct fractal {
fractal (unsigned octaves,
double frequency,
double lacunarity);
fractal ();
virtual ~fractal ();
unsigned octaves;
double frequency;
double lacunarity;
virtual double eval (double x, double y) const = 0;
};
template <typename B>
struct fbm : public fractal {
fbm (unsigned octaves,
double frequency,
double lacunarity,
basis::seed_t seed);
fbm ();
B basis;
virtual double eval (double x, double y) const;
};
template <typename B>
struct musgrave : public fractal {
musgrave (unsigned octaves,
double frequency,
double lacunarity,
basis::seed_t seed);
musgrave ();
B basis;
virtual double eval (double x, double y) const;
};
}
}
#endif