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diff --git a/src/glm/gtx/matrix_query.hpp b/src/glm/gtx/matrix_query.hpp
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+///////////////////////////////////////////////////////////////////////////////////////////////////
+// OpenGL Mathematics Copyright (c) 2005 - 2011 G-Truc Creation (www.g-truc.net)
+///////////////////////////////////////////////////////////////////////////////////////////////////
+// Created : 2007-03-05
+// Updated : 2007-03-05
+// Licence : This source is under MIT License
+// File    : glm/gtx/matrix_query.hpp
+///////////////////////////////////////////////////////////////////////////////////////////////////
+// Dependency:
+// - GLM core
+///////////////////////////////////////////////////////////////////////////////////////////////////
+
+#ifndef glm_gtx_matrix_query
+#define glm_gtx_matrix_query
+
+// Dependency:
+#include "../glm.hpp"
+
+#if(defined(GLM_MESSAGES) && !defined(glm_ext))
+#	pragma message("GLM: GLM_GTX_matrix_query extension included")
+#endif
+
+namespace glm{
+namespace gtx{
+namespace matrix_query ///< GLM_GTX_matrix_query: Query to evaluate matrix properties
+{
+	/// \addtogroup gtx_matrix_query
+	/// @{
+
+	//! Return if a matrix a null matrix.
+	//! From GLM_GTX_matrix_query extension.
+	template<typename T> 
+	bool isNull(
+		const detail::tmat2x2<T>& m, 
+		const T epsilon = std::numeric_limits<T>::epsilon());
+		
+	//! Return if a matrix a null matrix.
+	//! From GLM_GTX_matrix_query extension.
+	template<typename T> 
+	bool isNull(
+		const detail::tmat3x3<T>& m, 
+		const T epsilon = std::numeric_limits<T>::epsilon());
+		
+	//! Return if a matrix a null matrix.
+	//! From GLM_GTX_matrix_query extension.
+	template<typename T> 
+	bool isNull(
+		const detail::tmat4x4<T>& m, 
+		const T epsilon = std::numeric_limits<T>::epsilon());
+			
+	//! Return if a matrix an identity matrix. 
+	//! From GLM_GTX_matrix_query extension.
+	template<typename genType> 
+	bool isIdentity(
+		const genType& m, 
+		const typename genType::value_type epsilon = std::numeric_limits<typename genType::value_type>::epsilon());
+
+	//! Return if a matrix a normalized matrix.
+	//! From GLM_GTX_matrix_query extension.
+	template<typename T> 
+	bool isNormalized(
+		const detail::tmat2x2<T>& m, 
+		const T epsilon = std::numeric_limits<T>::epsilon());
+		
+	//! Return if a matrix a normalized matrix.
+	//! From GLM_GTX_matrix_query extension.
+	template<typename T> 
+	bool isNormalized(
+		const detail::tmat3x3<T>& m, 
+		const T epsilon = std::numeric_limits<T>::epsilon());
+		
+	//! Return if a matrix a normalized matrix.
+	//! From GLM_GTX_matrix_query extension.
+	template<typename T> 
+	bool isNormalized(
+		const detail::tmat4x4<T>& m, 
+		const T epsilon = std::numeric_limits<T>::epsilon());
+
+	//! Return if a matrix an orthonormalized matrix.
+	//! From GLM_GTX_matrix_query extension.
+	template<typename genType> 
+	bool isOrthogonal(
+		const genType& m, 
+		const typename genType::value_type epsilon = std::numeric_limits<typename genType::value_type>::epsilon());
+
+	/// @}
+}//namespace matrix_query
+}//namespace gtx
+}//namespace glm
+
+#include "matrix_query.inl"
+
+namespace glm{using namespace gtx::matrix_query;}
+
+#endif//glm_gtx_matrix_query