ACE3/extensions/common/glm/detail/_noise.hpp

///////////////////////////////////////////////////////////////////////////////////
/// OpenGL Mathematics (glm.g-truc.net)
///
/// Copyright (c) 2005 - 2015 G-Truc Creation (www.g-truc.net)
/// Permission is hereby granted, free of charge, to any person obtaining a copy
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/// 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.
/// 
/// Restrictions:
///        By making use of the Software for military purposes, you choose to make
///        a Bunny unhappy.
/// 
/// 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
///////////////////////////////////////////////////////////////////////////////////

#pragma once

#include "../vec2.hpp"
#include "../vec3.hpp"
#include "../vec4.hpp"
#include "../common.hpp"

namespace glm{
namespace detail
{
    template <typename T>
    GLM_FUNC_QUALIFIER 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>
    GLM_FUNC_QUALIFIER T permute(T const & x)
    {
        return mod289(((x * static_cast<T>(34)) + static_cast<T>(1)) * x);
    }

    template <typename T, precision P>
    GLM_FUNC_QUALIFIER 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>
    GLM_FUNC_QUALIFIER 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>
    GLM_FUNC_QUALIFIER tvec4<T, P> permute(tvec4<T, P> const & x)
    {
        return mod289(((x * static_cast<T>(34)) + static_cast<T>(1)) * x);
    }
/*
    template <typename T, precision P, template<typename> class vecType>
    GLM_FUNC_QUALIFIER vecType<T, P> permute(vecType<T, P> const & x)
    {
        return mod289(((x * T(34)) + T(1)) * x);
    }
*/
    template <typename T>
    GLM_FUNC_QUALIFIER T taylorInvSqrt(T const & r)
    {
        return T(1.79284291400159) - T(0.85373472095314) * r;
    }
    
    template <typename T, precision P>
    GLM_FUNC_QUALIFIER tvec2<T, P> taylorInvSqrt(tvec2<T, P> const & r)
    {
        return T(1.79284291400159) - T(0.85373472095314) * r;
    }
    
    template <typename T, precision P>
    GLM_FUNC_QUALIFIER tvec3<T, P> taylorInvSqrt(tvec3<T, P> const & r)
    {
        return T(1.79284291400159) - T(0.85373472095314) * r;
    }
    
    template <typename T, precision P>
    GLM_FUNC_QUALIFIER tvec4<T, P> taylorInvSqrt(tvec4<T, P> const & r)
    {
        return T(1.79284291400159) - T(0.85373472095314) * r;
    }
/*
    template <typename T, precision P, template<typename> class vecType>
    GLM_FUNC_QUALIFIER vecType<T, P> taylorInvSqrt(vecType<T, P> const & r)
    {
        return T(1.79284291400159) - T(0.85373472095314) * r;
    }
*/
    
    template <typename T, precision P>
    GLM_FUNC_QUALIFIER tvec2<T, P> fade(tvec2<T, P> const & t)
    {
        return (t * t * t) * (t * (t * T(6) - T(15)) + T(10));
    }
    
    template <typename T, precision P>
    GLM_FUNC_QUALIFIER tvec3<T, P> fade(tvec3<T, P> const & t)
    {
        return (t * t * t) * (t * (t * T(6) - T(15)) + T(10));
    }
    
    template <typename T, precision P>
    GLM_FUNC_QUALIFIER tvec4<T, P> fade(tvec4<T, P> const & t)
    {
        return (t * t * t) * (t * (t * T(6) - T(15)) + T(10));
    }
/*
    template <typename T, precision P, template <typename> class vecType>
    GLM_FUNC_QUALIFIER vecType<T, P> fade(vecType<T, P> const & t)
    {
        return (t * t * t) * (t * (t * T(6) - T(15)) + T(10));
    }
*/
}//namespace detail
}//namespace glm