93 lines
3.1 KiB
C++
93 lines
3.1 KiB
C++
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/// @ref gtx_fast_square_root
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/// @file glm/gtx/fast_square_root.hpp
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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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#pragma once
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// Dependency:
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#include "../common.hpp"
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#include "../exponential.hpp"
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#include "../geometric.hpp"
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#ifndef GLM_ENABLE_EXPERIMENTAL
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# error "GLM: GLM_GTX_fast_square_root is an experimental extension and may change in the future. Use #define GLM_ENABLE_EXPERIMENTAL before including it, if you really want to use it."
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#endif
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#if GLM_MESSAGES == GLM_MESSAGES_ENABLED && !defined(GLM_EXT_INCLUDED)
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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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///
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/// @see gtx_fast_square_root extension.
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template<typename genType>
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GLM_FUNC_DECL genType fastSqrt(genType x);
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/// Faster than the common sqrt function but less accurate.
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///
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/// @see gtx_fast_square_root extension.
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template<length_t L, typename T, precision P, template<length_t, typename, precision> class vecType>
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GLM_FUNC_DECL vecType<L, T, P> fastSqrt(vecType<L, T, P> const & x);
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/// Faster than the common inversesqrt function but less accurate.
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///
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/// @see gtx_fast_square_root extension.
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template<typename genType>
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GLM_FUNC_DECL genType fastInverseSqrt(genType x);
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/// Faster than the common inversesqrt function but less accurate.
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///
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/// @see gtx_fast_square_root extension.
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template<length_t L, typename T, precision P, template<length_t, typename, precision> class vecType>
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GLM_FUNC_DECL vecType<L, T, P> fastInverseSqrt(vecType<L, T, P> const & x);
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/// Faster than the common length function but less accurate.
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///
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/// @see gtx_fast_square_root extension.
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template<typename genType>
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GLM_FUNC_DECL genType fastLength(genType x);
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/// Faster than the common length function but less accurate.
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///
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/// @see gtx_fast_square_root extension.
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template<length_t L, typename T, precision P, template<length_t, typename, precision> class vecType>
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GLM_FUNC_DECL T fastLength(vecType<L, T, P> const & x);
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/// Faster than the common distance function but less accurate.
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///
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/// @see gtx_fast_square_root extension.
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template<typename genType>
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GLM_FUNC_DECL genType fastDistance(genType x, genType y);
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/// Faster than the common distance function but less accurate.
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///
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/// @see gtx_fast_square_root extension.
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template<length_t L, typename T, precision P, template<length_t, typename, precision> class vecType>
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GLM_FUNC_DECL T fastDistance(vecType<L, T, P> const & x, vecType<L, T, P> const & y);
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/// Faster than the common normalize function but less accurate.
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///
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/// @see gtx_fast_square_root extension.
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template<typename genType>
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GLM_FUNC_DECL 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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