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76 lines
2.5 KiB
C++
76 lines
2.5 KiB
C++
///////////////////////////////////////////////////////////////////////////////////////////////////
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// OpenGL Mathematics Copyright (c) 2005 - 2011 G-Truc Creation (www.g-truc.net)
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///////////////////////////////////////////////////////////////////////////////////////////////////
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// Created : 2006-01-04
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// Updated : 2008-10-07
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// Licence : This source is under MIT License
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// File : glm/gtx/fast_square_root.hpp
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///////////////////////////////////////////////////////////////////////////////////////////////////
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// Dependency:
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// - GLM core
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///////////////////////////////////////////////////////////////////////////////////////////////////
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// Note:
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// - Sqrt optimisation based on Newton's method,
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// www.gamedev.net/community/forums/topic.asp?topic id=139956
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///////////////////////////////////////////////////////////////////////////////////////////////////
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#ifndef glm_gtx_fast_square_root
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#define glm_gtx_fast_square_root
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// Dependency:
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#include "../glm.hpp"
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#if(defined(GLM_MESSAGES) && !defined(glm_ext))
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# pragma message("GLM: GLM_GTX_fast_square_root extension included")
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#endif
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namespace glm
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{
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namespace test{
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void main_gtx_fast_square_root();
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}//namespace test
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namespace gtx{
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//! GLM_GTX_fast_square_root extension: Fast but less accurate implementations of square root based functions.
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namespace fast_square_root
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{
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/// \addtogroup gtx_fast_square_root
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///@{
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//! Faster than the common sqrt function but less accurate.
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//! From GLM_GTX_fast_square_root extension.
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template <typename genType>
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genType fastSqrt(genType const & x);
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//! Faster than the common inversesqrt function but less accurate.
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//! From GLM_GTX_fast_square_root extension.
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template <typename genType>
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genType fastInverseSqrt(genType const & x);
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//! Faster than the common length function but less accurate.
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//! From GLM_GTX_fast_square_root extension.
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template <typename genType>
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typename genType::value_type fastLength(genType const & x);
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//! Faster than the common distance function but less accurate.
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//! From GLM_GTX_fast_square_root extension.
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template <typename genType>
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typename genType::value_type fastDistance(genType const & x, genType const & y);
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//! Faster than the common normalize function but less accurate.
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//! From GLM_GTX_fast_square_root extension.
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template <typename genType>
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genType fastNormalize(genType const & x);
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///@}
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}//namespace fast_square_root
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}// namespace gtx
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}//namespace glm
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#include "fast_square_root.inl"
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namespace glm{using namespace gtx::fast_square_root;}
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#endif//glm_gtx_fast_square_root
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