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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 gtc_ulp
+/// @file glm/gtc/ulp.hpp
+/// @date 2011-02-21 / 2011-12-12
+/// @author Christophe Riccio
+///
+/// @see core (dependence)
+///
+/// @defgroup gtc_ulp GLM_GTC_ulp
+/// @ingroup gtc
+///
+/// @brief Allow the measurement of the accuracy of a function against a reference
+/// implementation. This extension works on floating-point data and provide results
+/// in ULP.
+/// <glm/gtc/ulp.hpp> need to be included to use these features.
+///////////////////////////////////////////////////////////////////////////////////
+
+#pragma once
+
+// Dependencies
+#include "../detail/setup.hpp"
+#include "../detail/precision.hpp"
+#include "../detail/type_int.hpp"
+
+#if(defined(GLM_MESSAGES) && !defined(GLM_EXT_INCLUDED))
+# pragma message("GLM: GLM_GTC_ulp extension included")
+#endif
+
+namespace glm
+{
+ /// @addtogroup gtc_ulp
+ /// @{
+
+ /// Return the next ULP value(s) after the input value(s).
+ /// @see gtc_ulp
+ template <typename genType>
+ GLM_FUNC_DECL genType next_float(genType const & x);
+
+ /// Return the previous ULP value(s) before the input value(s).
+ /// @see gtc_ulp
+ template <typename genType>
+ GLM_FUNC_DECL genType prev_float(genType const & x);
+
+ /// Return the value(s) ULP distance after the input value(s).
+ /// @see gtc_ulp
+ template <typename genType>
+ GLM_FUNC_DECL genType next_float(genType const & x, uint const & Distance);
+
+ /// Return the value(s) ULP distance before the input value(s).
+ /// @see gtc_ulp
+ template <typename genType>
+ GLM_FUNC_DECL genType prev_float(genType const & x, uint const & Distance);
+
+ /// Return the distance in the number of ULP between 2 scalars.
+ /// @see gtc_ulp
+ template <typename T>
+ GLM_FUNC_DECL uint float_distance(T const & x, T const & y);
+
+ /// Return the distance in the number of ULP between 2 vectors.
+ /// @see gtc_ulp
+ template<typename T, template<typename> class vecType>
+ GLM_FUNC_DECL vecType<uint> float_distance(vecType<T> const & x, vecType<T> const & y);
+
+ /// @}
+}// namespace glm
+
+#include "ulp.inl"