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- /// @ref gtx_fast_square_root
- /// @file glm/gtx/fast_square_root.hpp
- ///
- /// @see core (dependence)
- ///
- /// @defgroup gtx_fast_square_root GLM_GTX_fast_square_root
- /// @ingroup gtx
- ///
- /// Include <glm/gtx/fast_square_root.hpp> to use the features of this extension.
- ///
- /// Fast but less accurate implementations of square root based functions.
- /// - Sqrt optimisation based on Newton's method,
- /// www.gamedev.net/community/forums/topic.asp?topic id=139956
- #pragma once
- // Dependency:
- #include "../common.hpp"
- #include "../exponential.hpp"
- #include "../geometric.hpp"
- #if GLM_MESSAGES == GLM_ENABLE && !defined(GLM_EXT_INCLUDED)
- # ifndef GLM_ENABLE_EXPERIMENTAL
- # pragma message("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.")
- # else
- # pragma message("GLM: GLM_GTX_fast_square_root extension included")
- # endif
- #endif
- namespace glm
- {
- /// @addtogroup gtx_fast_square_root
- /// @{
- /// Faster than the common sqrt function but less accurate.
- ///
- /// @see gtx_fast_square_root extension.
- template<typename genType>
- GLM_FUNC_DECL genType fastSqrt(genType x);
- /// Faster than the common sqrt function but less accurate.
- ///
- /// @see gtx_fast_square_root extension.
- template<length_t L, typename T, qualifier Q>
- GLM_FUNC_DECL vec<L, T, Q> fastSqrt(vec<L, T, Q> const& x);
- /// Faster than the common inversesqrt function but less accurate.
- ///
- /// @see gtx_fast_square_root extension.
- template<typename genType>
- GLM_FUNC_DECL genType fastInverseSqrt(genType x);
- /// Faster than the common inversesqrt function but less accurate.
- ///
- /// @see gtx_fast_square_root extension.
- template<length_t L, typename T, qualifier Q>
- GLM_FUNC_DECL vec<L, T, Q> fastInverseSqrt(vec<L, T, Q> const& x);
- /// Faster than the common length function but less accurate.
- ///
- /// @see gtx_fast_square_root extension.
- template<typename genType>
- GLM_FUNC_DECL genType fastLength(genType x);
- /// Faster than the common length function but less accurate.
- ///
- /// @see gtx_fast_square_root extension.
- template<length_t L, typename T, qualifier Q>
- GLM_FUNC_DECL T fastLength(vec<L, T, Q> const& x);
- /// Faster than the common distance function but less accurate.
- ///
- /// @see gtx_fast_square_root extension.
- template<typename genType>
- GLM_FUNC_DECL genType fastDistance(genType x, genType y);
- /// Faster than the common distance function but less accurate.
- ///
- /// @see gtx_fast_square_root extension.
- template<length_t L, typename T, qualifier Q>
- GLM_FUNC_DECL T fastDistance(vec<L, T, Q> const& x, vec<L, T, Q> const& y);
- /// Faster than the common normalize function but less accurate.
- ///
- /// @see gtx_fast_square_root extension.
- template<typename genType>
- GLM_FUNC_DECL genType fastNormalize(genType const& x);
- /// @}
- }// namespace glm
- #include "fast_square_root.inl"
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