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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 core
-/// @file glm/detail/func_exponential.inl
-/// @date 2008-08-03 / 2011-06-15
-/// @author Christophe Riccio
-///////////////////////////////////////////////////////////////////////////////////
-
-#include "func_vector_relational.hpp"
-#include "_vectorize.hpp"
-#include <limits>
-#include <cmath>
-#include <cassert>
-
-namespace glm{
-namespace detail
-{
-# if GLM_HAS_CXX11_STL
- using std::log2;
-# else
- template <typename genType>
- genType log2(genType Value)
- {
- return std::log(Value) * static_cast<genType>(1.4426950408889634073599246810019);
- }
-# endif
-
- template <typename T, precision P, template <class, precision> class vecType, bool isFloat = true>
- struct compute_log2
- {
- GLM_FUNC_QUALIFIER static vecType<T, P> call(vecType<T, P> const & vec)
- {
- return detail::functor1<T, T, P, vecType>::call(log2, vec);
- }
- };
-
- template <template <class, precision> class vecType, typename T, precision P>
- struct compute_inversesqrt
- {
- GLM_FUNC_QUALIFIER static vecType<T, P> call(vecType<T, P> const & x)
- {
- return static_cast<T>(1) / sqrt(x);
- }
- };
-
- template <template <class, precision> class vecType>
- struct compute_inversesqrt<vecType, float, lowp>
- {
- GLM_FUNC_QUALIFIER static vecType<float, lowp> call(vecType<float, lowp> const & x)
- {
- vecType<float, lowp> tmp(x);
- vecType<float, lowp> xhalf(tmp * 0.5f);
- vecType<uint, lowp>* p = reinterpret_cast<vecType<uint, lowp>*>(const_cast<vecType<float, lowp>*>(&x));
- vecType<uint, lowp> i = vecType<uint, lowp>(0x5f375a86) - (*p >> vecType<uint, lowp>(1));
- vecType<float, lowp>* ptmp = reinterpret_cast<vecType<float, lowp>*>(&i);
- tmp = *ptmp;
- tmp = tmp * (1.5f - xhalf * tmp * tmp);
- return tmp;
- }
- };
-}//namespace detail
-
- // pow
- using std::pow;
- template <typename T, precision P, template <typename, precision> class vecType>
- GLM_FUNC_QUALIFIER vecType<T, P> pow(vecType<T, P> const & base, vecType<T, P> const & exponent)
- {
- return detail::functor2<T, P, vecType>::call(pow, base, exponent);
- }
-
- // exp
- using std::exp;
- template <typename T, precision P, template <typename, precision> class vecType>
- GLM_FUNC_QUALIFIER vecType<T, P> exp(vecType<T, P> const & x)
- {
- return detail::functor1<T, T, P, vecType>::call(exp, x);
- }
-
- // log
- using std::log;
- template <typename T, precision P, template <typename, precision> class vecType>
- GLM_FUNC_QUALIFIER vecType<T, P> log(vecType<T, P> const & x)
- {
- return detail::functor1<T, T, P, vecType>::call(log, x);
- }
-
- //exp2, ln2 = 0.69314718055994530941723212145818f
- template <typename genType>
- GLM_FUNC_QUALIFIER genType exp2(genType x)
- {
- GLM_STATIC_ASSERT(std::numeric_limits<genType>::is_iec559, "'exp2' only accept floating-point inputs");
-
- return std::exp(static_cast<genType>(0.69314718055994530941723212145818) * x);
- }
-
- template <typename T, precision P, template <typename, precision> class vecType>
- GLM_FUNC_QUALIFIER vecType<T, P> exp2(vecType<T, P> const & x)
- {
- return detail::functor1<T, T, P, vecType>::call(exp2, x);
- }
-
- // log2, ln2 = 0.69314718055994530941723212145818f
- template <typename genType>
- GLM_FUNC_QUALIFIER genType log2(genType x)
- {
- return log2(tvec1<genType>(x)).x;
- }
-
- template <typename T, precision P, template <typename, precision> class vecType>
- GLM_FUNC_QUALIFIER vecType<T, P> log2(vecType<T, P> const & x)
- {
- return detail::compute_log2<T, P, vecType, std::numeric_limits<T>::is_iec559>::call(x);
- }
-
- // sqrt
- using std::sqrt;
- template <typename T, precision P, template <typename, precision> class vecType>
- GLM_FUNC_QUALIFIER vecType<T, P> sqrt(vecType<T, P> const & x)
- {
- GLM_STATIC_ASSERT(std::numeric_limits<T>::is_iec559, "'sqrt' only accept floating-point inputs");
- return detail::functor1<T, T, P, vecType>::call(sqrt, x);
- }
-
- // inversesqrt
- template <typename genType>
- GLM_FUNC_QUALIFIER genType inversesqrt(genType x)
- {
- return static_cast<genType>(1) / sqrt(x);
- }
-
- template <typename T, precision P, template <typename, precision> class vecType>
- GLM_FUNC_QUALIFIER vecType<T, P> inversesqrt(vecType<T, P> const & x)
- {
- GLM_STATIC_ASSERT(std::numeric_limits<T>::is_iec559, "'inversesqrt' only accept floating-point inputs");
- return detail::compute_inversesqrt<vecType, T, P>::call(x);
- }
-}//namespace glm