libcruft-util/noise/basis.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_BASIS_HPP
#define __UTIL_NOISE_BASIS_HPP
#include <cstdlib>
#include "../lerp.hpp"
namespace util {
namespace noise {
typedef double (*lerp_function)(double, double, double);
struct basis {
typedef size_t seed_t;
basis (seed_t);
basis ();
virtual ~basis ();
seed_t seed;
virtual double eval (double x, double y) const = 0;
};
template <lerp_function L> struct value : public basis {
value (seed_t);
value ();
virtual double eval (double x, double y) const;
};
template <lerp_function L> struct gradient : public basis {
gradient (seed_t);
gradient ();
virtual double eval (double x, double y) const;
};
struct cellular : public basis {
cellular (seed_t);
cellular ();
virtual double eval (double x, double y) const;
};
}
}
#endif