86 lines
3.2 KiB
C++
86 lines
3.2 KiB
C++
///////////////////////////////////////////////////////////////////////////////////
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/// OpenGL Mathematics (glm.g-truc.net)
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///
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/// Copyright (c) 2005 - 2012 G-Truc Creation (www.g-truc.net)
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/// Permission is hereby granted, free of charge, to any person obtaining a copy
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/// of this software and associated documentation files (the "Software"), to deal
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/// in the Software without restriction, including without limitation the rights
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/// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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/// copies of the Software, and to permit persons to whom the Software is
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/// furnished to do so, subject to the following conditions:
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///
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/// The above copyright notice and this permission notice shall be included in
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/// all copies or substantial portions of the Software.
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///
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/// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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/// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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/// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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/// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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/// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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/// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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/// THE SOFTWARE.
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///
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/// @ref gtx_fast_square_root
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/// @file glm/gtx/fast_square_root.hpp
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/// @date 2006-01-04 / 2011-06-07
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/// @author Christophe Riccio
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///
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/// @see core (dependence)
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///
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/// @defgroup gtx_fast_square_root GLM_GTX_fast_square_root
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/// @ingroup gtx
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///
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/// @brief Fast but less accurate implementations of square root based functions.
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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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/// <glm/gtx/fast_square_root.hpp> need to be included to use these functionalities.
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///////////////////////////////////////////////////////////////////////////////////
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#ifndef GLM_GTX_fast_square_root
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#define GLM_GTX_fast_square_root GLM_VERSION
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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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/// @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 glm
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#include "fast_square_root.inl"
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#endif//GLM_GTX_fast_square_root
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