fast_square_root.hpp

// OpenGL Mathematics Copyright (c) 2005 - 2011 G-Truc Creation (www.g-truc.net)
// Created : 2006-01-04
// Updated : 2008-10-07
// Licence : This source is under MIT License
// File    : glm/gtx/fast_square_root.hpp
// Dependency:
// - GLM core
// Note:
// - Sqrt optimisation based on Newton's method, 
// www.gamedev.net/community/forums/topic.asp?topic id=139956

#ifndef glm_gtx_fast_square_root
#define glm_gtx_fast_square_root

// Dependency:
#include "../glm.hpp"

#if(defined(GLM_MESSAGES) && !defined(glm_ext))
#       pragma message("GLM: GLM_GTX_fast_square_root extension included")
#endif

namespace glm
{
        namespace test{
                void main_gtx_fast_square_root();
        }//namespace test

        namespace gtx{
        namespace fast_square_root
        {

                template <typename genType> 
                genType fastSqrt(genType const & x);

                template <typename genType> 
                genType fastInverseSqrt(genType const & x);
                
                template <typename genType> 
                typename genType::value_type fastLength(genType const & x);

                template <typename genType> 
                typename genType::value_type fastDistance(genType const & x, genType const & y);

                template <typename genType> 
                genType fastNormalize(genType const & x);


        }//namespace fast_square_root
        }//     namespace gtx
}//namespace glm

#include "fast_square_root.inl"

namespace glm{using namespace gtx::fast_square_root;}

#endif//glm_gtx_fast_square_root