libcruft-util/noise/fractal/base.ipp

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/*
* 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>
*/
#ifdef __UTIL_NOISE_FRACTAL_BASE_IPP
#error
#endif
#define __UTIL_NOISE_FRACTAL_BASE_IPP
#include <cmath>
namespace util { namespace noise { namespace fractal {
///////////////////////////////////////////////////////////////////////////
template <typename T, typename B>
base<T,B>::base (seed_t _seed,
unsigned _octaves,
T _H,
T _frequency,
T _lacunarity,
T _amplitude,
T _gain):
// literals
m_octaves (_octaves),
m_H (_H),
m_frequency (_frequency),
m_lacunarity (_lacunarity),
m_amplitude (_amplitude),
m_gain (_gain),
// compound
m_basis (_seed),
// calculated
m_invAH (std::pow (_amplitude, -_H)),
m_invGH (std::pow (_gain, _H))
{
CHECK_NEQ (m_octaves, 0);
CHECK_NEQ (m_frequency, 0);
CHECK_NEQ (m_amplitude, 0);
}
///////////////////////////////////////////////////////////////////////////
template <typename T, typename B>
unsigned
base<T,B>::octaves (unsigned _octaves)
{
return m_octaves = _octaves;
}
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//-------------------------------------------------------------------------
template <typename T, typename B>
constexpr unsigned
base<T,B>::octaves (void) const
{
return m_octaves;
}
//-------------------------------------------------------------------------
template <typename T, typename B>
T
base<T,B>::H (T _h)
{
m_H = _h;
m_invAH = std::pow (m_amplitude, -m_H);
m_invGH = std::pow (m_gain, m_H);
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return m_H;
}
//-------------------------------------------------------------------------
template <typename T, typename B>
constexpr T
base<T,B>::H (void) const
{
return m_H;
}
//-------------------------------------------------------------------------
template <typename T, typename B>
T
base<T,B>::frequency (T _frequency)
{
return m_frequency = _frequency;
}
//-------------------------------------------------------------------------
template <typename T, typename B>
constexpr T
base<T,B>::frequency (void) const
{
return m_frequency;
}
//-------------------------------------------------------------------------
template <typename T, typename B>
T
base<T,B>::lacunarity (T _lacunarity)
{
return m_lacunarity = _lacunarity;
}
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//-------------------------------------------------------------------------
template <typename T, typename B>
constexpr T
base<T,B>::lacunarity (void) const
{
return m_lacunarity;
}
//-------------------------------------------------------------------------
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template <typename T, typename B>
typename base<T,B>::seed_t
base<T,B>::seed (seed_t _seed)
{
return m_basis.seed (_seed);
}
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//-------------------------------------------------------------------------
template <typename T, typename B>
typename base<T,B>::seed_t
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base<T,B>::seed (void) const
{
return m_basis.seed ();
}
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//-------------------------------------------------------------------------
template <typename T, typename B>
const B&
base<T,B>::basis (void) const
{
return m_basis;
}
//-------------------------------------------------------------------------
template <typename T, typename B>
B&
base<T,B>::basis (void)
{
return m_basis;
}
} } }