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fast_square_root.hpp
00001 00002 // OpenGL Mathematics Copyright (c) 2005 - 2011 G-Truc Creation (www.g-truc.net) 00004 // Created : 2006-01-04 00005 // Updated : 2008-10-07 00006 // Licence : This source is under MIT License 00007 // File : glm/gtx/fast_square_root.hpp 00009 // Dependency: 00010 // - GLM core 00012 // Note: 00013 // - Sqrt optimisation based on Newton's method, 00014 // www.gamedev.net/community/forums/topic.asp?topic id=139956 00016 00017 #ifndef glm_gtx_fast_square_root 00018 #define glm_gtx_fast_square_root 00019 00020 // Dependency: 00021 #include "../glm.hpp" 00022 00023 #if(defined(GLM_MESSAGES) && !defined(glm_ext)) 00024 # pragma message("GLM: GLM_GTX_fast_square_root extension included") 00025 #endif 00026 00027 namespace glm{ 00028 namespace gtx{ 00029 namespace fast_square_root 00030 { 00033 00036 template <typename genType> 00037 genType fastSqrt(genType const & x); 00038 00041 template <typename genType> 00042 genType fastInverseSqrt(genType const & x); 00043 00046 template <typename genType> 00047 typename genType::value_type fastLength(genType const & x); 00048 00051 template <typename genType> 00052 typename genType::value_type fastDistance(genType const & x, genType const & y); 00053 00056 template <typename genType> 00057 genType fastNormalize(genType const & x); 00058 00060 }// namespace fast_square_root 00061 }// namespace gtx 00062 }// namespace glm 00063 00064 #include "fast_square_root.inl" 00065 00066 namespace glm{using namespace gtx::fast_square_root;} 00067 00068 #endif//glm_gtx_fast_square_root
