/*
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 * Copyright 2015 Danny Robson <danny@nerdcruft.net>
 */


#ifndef __UTIL_NOISE_BASIS_EXPGRAD_HPP
#define __UTIL_NOISE_BASIS_EXPGRAD_HPP

#include "./gradient.hpp"

#include "../fwd.hpp"
#include "../../point.hpp"
#include "../../range.hpp"

namespace util { namespace noise { namespace basis {
    template <typename T, lerp_t<T> L>
    struct expgrad : public gradient<T,L> {
        explicit expgrad <T,L> (seed_t seed, T base = (T)1.02, T exponent = T{256});

        T base (void) const;
        T base (T);

        T exponent (void) const;
        T exponent (T);

    protected:
        vector<2,T> generate (point<2,intmax_t>) const;

        T m_base;
        T m_exponent;
    };
} } }

#include "expgrad.ipp"

#endif