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-///////////////////////////////////////////////////////////////////////////////////
-/// OpenGL Mathematics (glm.g-truc.net)
-///
-/// Copyright (c) 2005 - 2015 G-Truc Creation (www.g-truc.net)
-/// Permission is hereby granted, free of charge, to any person obtaining a copy
-/// of this software and associated documentation files (the "Software"), to deal
-/// in the Software without restriction, including without limitation the rights
-/// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
-/// copies of the Software, and to permit persons to whom the Software is
-/// furnished to do so, subject to the following conditions:
-///
-/// The above copyright notice and this permission notice shall be included in
-/// all copies or substantial portions of the Software.
-///
-/// Restrictions:
-/// By making use of the Software for military purposes, you choose to make
-/// a Bunny unhappy.
-///
-/// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-/// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
-/// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
-/// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
-/// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
-/// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
-/// THE SOFTWARE.
-///
-/// @ref gtx_fast_square_root
-/// @file glm/gtx/fast_square_root.inl
-/// @date 2006-01-04 / 2011-06-07
-/// @author Christophe Riccio
-///////////////////////////////////////////////////////////////////////////////////////////////////
-
-namespace glm
-{
- // fastSqrt
- template <typename genType>
- GLM_FUNC_QUALIFIER genType fastSqrt(genType x)
- {
- GLM_STATIC_ASSERT(std::numeric_limits<genType>::is_iec559, "'fastSqrt' only accept floating-point input");
-
- return genType(1) / fastInverseSqrt(x);
- }
-
- template <typename T, precision P, template <typename, precision> class vecType>
- GLM_FUNC_QUALIFIER vecType<T, P> fastSqrt(vecType<T, P> const & x)
- {
- return detail::functor1<T, T, P, vecType>::call(fastSqrt, x);
- }
-
- // fastInversesqrt
- template <typename genType>
- GLM_FUNC_QUALIFIER genType fastInverseSqrt(genType x)
- {
-# ifdef __CUDACC__ // Wordaround for a CUDA compiler bug up to CUDA6
- tvec1<T, P> tmp(detail::compute_inversesqrt<tvec1, genType, lowp>::call(tvec1<genType, lowp>(x)));
- return tmp.x;
-# else
- return detail::compute_inversesqrt<tvec1, genType, lowp>::call(tvec1<genType, lowp>(x)).x;
-# endif
- }
-
- template <typename T, precision P, template <typename, precision> class vecType>
- GLM_FUNC_QUALIFIER vecType<T, P> fastInverseSqrt(vecType<T, P> const & x)
- {
- return detail::compute_inversesqrt<vecType, T, P>::call(x);
- }
-
- // fastLength
- template <typename genType>
- GLM_FUNC_QUALIFIER genType fastLength(genType x)
- {
- GLM_STATIC_ASSERT(std::numeric_limits<genType>::is_iec559, "'fastLength' only accept floating-point inputs");
-
- return abs(x);
- }
-
- template <typename T, precision P, template <typename, precision> class vecType>
- GLM_FUNC_QUALIFIER T fastLength(vecType<T, P> const & x)
- {
- GLM_STATIC_ASSERT(std::numeric_limits<T>::is_iec559, "'fastLength' only accept floating-point inputs");
-
- return fastSqrt(dot(x, x));
- }
-
- // fastDistance
- template <typename genType>
- GLM_FUNC_QUALIFIER genType fastDistance(genType x, genType y)
- {
- return fastLength(y - x);
- }
-
- template <typename T, precision P, template <typename, precision> class vecType>
- GLM_FUNC_QUALIFIER T fastDistance(vecType<T, P> const & x, vecType<T, P> const & y)
- {
- return fastLength(y - x);
- }
-
- // fastNormalize
- template <typename genType>
- GLM_FUNC_QUALIFIER genType fastNormalize(genType x)
- {
- return x > genType(0) ? genType(1) : -genType(1);
- }
-
- template <typename T, precision P, template <typename, precision> class vecType>
- GLM_FUNC_QUALIFIER vecType<T, P> fastNormalize(vecType<T, P> const & x)
- {
- return x * fastInverseSqrt(dot(x, x));
- }
-}//namespace glm