163 lines
4.2 KiB
C++
163 lines
4.2 KiB
C++
/*
|
|
* 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;
|
|
}
|
|
|
|
|
|
//-------------------------------------------------------------------------
|
|
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);
|
|
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;
|
|
}
|
|
|
|
|
|
//-------------------------------------------------------------------------
|
|
template <typename T, typename B>
|
|
constexpr T
|
|
base<T,B>::lacunarity (void) const
|
|
{
|
|
return m_lacunarity;
|
|
}
|
|
|
|
|
|
//-------------------------------------------------------------------------
|
|
template <typename T, typename B>
|
|
typename base<T,B>::seed_t
|
|
base<T,B>::seed (seed_t _seed)
|
|
{
|
|
return m_basis.seed (_seed);
|
|
}
|
|
|
|
|
|
//-------------------------------------------------------------------------
|
|
template <typename T, typename B>
|
|
typename base<T,B>::seed_t
|
|
base<T,B>::seed (void) const
|
|
{
|
|
return m_basis.seed ();
|
|
}
|
|
|
|
|
|
//-------------------------------------------------------------------------
|
|
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;
|
|
}
|
|
} } }
|