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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_norm
+/// @file glm/gtx/norm.hpp
+/// @date 2005-12-21 / 2011-06-07
+/// @author Christophe Riccio
+///
+/// @see core (dependence)
+/// @see gtx_quaternion (dependence)
+///
+/// @defgroup gtx_norm GLM_GTX_norm
+/// @ingroup gtx
+/// 
+/// @brief Various ways to compute vector norms.
+/// 
+/// <glm/gtx/norm.hpp> need to be included to use these functionalities.
+///////////////////////////////////////////////////////////////////////////////////
+
+#pragma once
+
+// Dependency:
+#include "../glm.hpp"
+#include "../gtx/quaternion.hpp"
+
+#if(defined(GLM_MESSAGES) && !defined(GLM_EXT_INCLUDED))
+#	pragma message("GLM: GLM_GTX_norm extension included")
+#endif
+
+namespace glm
+{
+	/// @addtogroup gtx_norm
+	/// @{
+
+	//! Returns the squared length of x.
+	//! From GLM_GTX_norm extension.
+	template <typename T>
+	GLM_FUNC_DECL T length2(
+		T const & x);
+
+	//! Returns the squared length of x.
+	//! From GLM_GTX_norm extension.
+	template <typename genType>
+	GLM_FUNC_DECL typename genType::value_type length2(
+		genType const & x);
+		
+	//! Returns the squared distance between p0 and p1, i.e., length(p0 - p1).
+	//! From GLM_GTX_norm extension.
+	template <typename T>
+	GLM_FUNC_DECL T distance2(
+		T const & p0,
+		T const & p1);
+		
+	//! Returns the squared distance between p0 and p1, i.e., length(p0 - p1).
+	//! From GLM_GTX_norm extension.
+	template <typename genType>
+	GLM_FUNC_DECL typename genType::value_type distance2(
+		genType const & p0,
+		genType const & p1);
+
+	//! Returns the L1 norm between x and y.
+	//! From GLM_GTX_norm extension.
+	template <typename T, precision P>
+	GLM_FUNC_DECL T l1Norm(
+		tvec3<T, P> const & x,
+		tvec3<T, P> const & y);
+		
+	//! Returns the L1 norm of v.
+	//! From GLM_GTX_norm extension.
+	template <typename T, precision P>
+	GLM_FUNC_DECL T l1Norm(
+		tvec3<T, P> const & v);
+		
+	//! Returns the L2 norm between x and y.
+	//! From GLM_GTX_norm extension.
+	template <typename T, precision P>
+	GLM_FUNC_DECL T l2Norm(
+		tvec3<T, P> const & x,
+		tvec3<T, P> const & y);
+		
+	//! Returns the L2 norm of v.
+	//! From GLM_GTX_norm extension.
+	template <typename T, precision P>
+	GLM_FUNC_DECL T l2Norm(
+		tvec3<T, P> const & x);
+		
+	//! Returns the L norm between x and y.
+	//! From GLM_GTX_norm extension.
+	template <typename T, precision P>
+	GLM_FUNC_DECL T lxNorm(
+		tvec3<T, P> const & x,
+		tvec3<T, P> const & y,
+		unsigned int Depth);
+
+	//! Returns the L norm of v.
+	//! From GLM_GTX_norm extension.
+	template <typename T, precision P>
+	GLM_FUNC_DECL T lxNorm(
+		tvec3<T, P> const & x,
+		unsigned int Depth);
+
+	/// @}
+}//namespace glm
+
+#include "norm.inl"