mirror of
https://github.com/libretro/RetroArch
synced 2025-02-02 14:54:10 +00:00
110 lines
3.6 KiB
C++
110 lines
3.6 KiB
C++
///////////////////////////////////////////////////////////////////////////////////
|
|
/// OpenGL Mathematics (glm.g-truc.net)
|
|
///
|
|
/// Copyright (c) 2005 - 2014 G-Truc Creation (www.g-truc.net)
|
|
/// Permission is hereby granted, free of charge, to any person obtaining a copy
|
|
/// of this software and associated documentation files (the "Software"), to deal
|
|
/// in the Software without restriction, including without limitation the rights
|
|
/// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
|
|
/// copies of the Software, and to permit persons to whom the Software is
|
|
/// furnished to do so, subject to the following conditions:
|
|
///
|
|
/// The above copyright notice and this permission notice shall be included in
|
|
/// all copies or substantial portions of the Software.
|
|
///
|
|
/// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
|
/// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
|
/// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
|
|
/// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
|
/// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
|
|
/// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
|
|
/// THE SOFTWARE.
|
|
///
|
|
/// @ref core
|
|
/// @file glm/detail/_noise.hpp
|
|
/// @date 2013-12-24 / 2013-12-24
|
|
/// @author Christophe Riccio
|
|
///////////////////////////////////////////////////////////////////////////////////
|
|
|
|
#ifndef GLM_DETAIL_NOISE_INCLUDED
|
|
#define GLM_DETAIL_NOISE_INCLUDED
|
|
|
|
namespace glm{
|
|
namespace detail
|
|
{
|
|
template <typename T>
|
|
inline T mod289(T const & x)
|
|
{
|
|
return x - floor(x * static_cast<T>(1.0) / static_cast<T>(289.0)) * static_cast<T>(289.0);
|
|
}
|
|
|
|
template <typename T>
|
|
inline T permute(T const & x)
|
|
{
|
|
return mod289(((x * static_cast<T>(34)) + static_cast<T>(1)) * x);
|
|
}
|
|
|
|
template <typename T, precision P>
|
|
inline tvec2<T, P> permute(tvec2<T, P> const & x)
|
|
{
|
|
return mod289(((x * static_cast<T>(34)) + static_cast<T>(1)) * x);
|
|
}
|
|
|
|
template <typename T, precision P>
|
|
inline tvec3<T, P> permute(tvec3<T, P> const & x)
|
|
{
|
|
return mod289(((x * static_cast<T>(34)) + static_cast<T>(1)) * x);
|
|
}
|
|
|
|
template <typename T, precision P>
|
|
inline tvec4<T, P> permute(tvec4<T, P> const & x)
|
|
{
|
|
return mod289(((x * static_cast<T>(34)) + static_cast<T>(1)) * x);
|
|
}
|
|
template <typename T>
|
|
inline T taylorInvSqrt(T const & r)
|
|
{
|
|
return T(1.79284291400159) - T(0.85373472095314) * r;
|
|
}
|
|
|
|
template <typename T, precision P>
|
|
inline detail::tvec2<T, P> taylorInvSqrt(detail::tvec2<T, P> const & r)
|
|
{
|
|
return T(1.79284291400159) - T(0.85373472095314) * r;
|
|
}
|
|
|
|
template <typename T, precision P>
|
|
inline detail::tvec3<T, P> taylorInvSqrt(detail::tvec3<T, P> const & r)
|
|
{
|
|
return T(1.79284291400159) - T(0.85373472095314) * r;
|
|
}
|
|
|
|
template <typename T, precision P>
|
|
inline detail::tvec4<T, P> taylorInvSqrt(detail::tvec4<T, P> const & r)
|
|
{
|
|
return T(1.79284291400159) - T(0.85373472095314) * r;
|
|
}
|
|
|
|
template <typename T, precision P>
|
|
inline detail::tvec2<T, P> fade(detail::tvec2<T, P> const & t)
|
|
{
|
|
return (t * t * t) * (t * (t * T(6) - T(15)) + T(10));
|
|
}
|
|
|
|
template <typename T, precision P>
|
|
inline detail::tvec3<T, P> fade(detail::tvec3<T, P> const & t)
|
|
{
|
|
return (t * t * t) * (t * (t * T(6) - T(15)) + T(10));
|
|
}
|
|
|
|
template <typename T, precision P>
|
|
inline detail::tvec4<T, P> fade(detail::tvec4<T, P> const & t)
|
|
{
|
|
return (t * t * t) * (t * (t * T(6) - T(15)) + T(10));
|
|
}
|
|
}//namespace detail
|
|
}//namespace glm
|
|
|
|
#endif//GLM_DETAIL_NOISE_INCLUDED
|
|
|