text: ///////////////////////////////////////////////////////////////////////////////////
  /// OpenGL Mathematics (glm.g-truc.net)
  ///
  /// Copyright (c) 2005 - 2014 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.
  /// 
  /// 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/core/type_mat4x4.hpp
  /// @date 2005-01-27 / 2011-06-15
  /// @author Christophe Riccio
  ///////////////////////////////////////////////////////////////////////////////////
  
  #ifndef glm_core_type_mat4x4
  #define glm_core_type_mat4x4
  
  #include "../fwd.hpp"
  #include "type_vec4.hpp"
  #include "type_mat.hpp"
  #if(GLM_HAS_INITIALIZER_LISTS)
  #	include <initializer_list>
  #endif //GLM_HAS_INITIALIZER_LISTS
  #include <limits>
  #include <cstddef>
  
  namespace glm{
  namespace detail
  {
  	template <typename T, precision P>
  	struct tmat4x4
  	{
  		enum ctor{_null};
  		typedef T value_type;
  		typedef std::size_t size_type;
  		typedef tvec4<T, P> col_type;
  		typedef tvec4<T, P> row_type;
  		typedef tmat4x4<T, P> type;
  		typedef tmat4x4<T, P> transpose_type;
  
  		GLM_FUNC_DECL GLM_CONSTEXPR length_t length() const;
  
  		template <typename U, precision Q>
  		friend tvec4<U, Q> operator/(tmat4x4<U, Q> const & m, tvec4<U, Q> const & v);
  		template <typename U, precision Q>
  		friend tvec4<U, Q> operator/(tvec4<U, Q> const & v, tmat4x4<U, Q> const & m);
  
  	private:
  		/// @cond DETAIL
  		col_type value[4];
  
  	public:
  		// Constructors
  		GLM_FUNC_DECL tmat4x4();
  		GLM_FUNC_DECL tmat4x4(tmat4x4<T, P> const & m);
  		template <precision Q>
  		GLM_FUNC_DECL tmat4x4(tmat4x4<T, Q> const & m);
  
  		GLM_FUNC_DECL explicit tmat4x4(
  			ctor Null);
  		GLM_FUNC_DECL explicit tmat4x4(
  			T const & x);
  		GLM_FUNC_DECL explicit tmat4x4(
  			T const & x0, T const & y0, T const & z0, T const & w0,
  			T const & x1, T const & y1, T const & z1, T const & w1,
  			T const & x2, T const & y2, T const & z2, T const & w2,
  			T const & x3, T const & y3, T const & z3, T const & w3);
  		GLM_FUNC_DECL explicit tmat4x4(
  			col_type const & v0,
  			col_type const & v1,
  			col_type const & v2,
  			col_type const & v3);
  
  #if(GLM_HAS_INITIALIZER_LISTS)
  		template <typename U>
  		GLM_FUNC_DECL tmat4x4(std::initializer_list<U> m);
  
  		GLM_FUNC_DECL tmat4x4(std::initializer_list<tvec4<T, P> > m);
  #endif//GLM_HAS_INITIALIZER_LISTS
  
  		//////////////////////////////////////
  		// Conversions
  
  		template <
  			typename X1, typename Y1, typename Z1, typename W1,
  			typename X2, typename Y2, typename Z2, typename W2,
  			typename X3, typename Y3, typename Z3, typename W3,
  			typename X4, typename Y4, typename Z4, typename W4>
  		GLM_FUNC_DECL explicit tmat4x4(
  			X1 const & x1, Y1 const & y1, Z1 const & z1, W1 const & w1,
  			X2 const & x2, Y2 const & y2, Z2 const & z2, W2 const & w2,
  			X3 const & x3, Y3 const & y3, Z3 const & z3, W3 const & w3,
  			X4 const & x4, Y4 const & y4, Z4 const & z4, W4 const & w4);
  			
  		template <typename V1, typename V2, typename V3, typename V4>
  		GLM_FUNC_DECL explicit tmat4x4(
  			tvec4<V1, P> const & v1,
  			tvec4<V2, P> const & v2,
  			tvec4<V3, P> const & v3,
  			tvec4<V4, P> const & v4);
  	
  		// Matrix conversions
  		template <typename U, precision Q>
  		GLM_FUNC_DECL explicit tmat4x4(tmat4x4<U, Q> const & m);
  
  		GLM_FUNC_DECL explicit tmat4x4(tmat2x2<T, P> const & x);
  		GLM_FUNC_DECL explicit tmat4x4(tmat3x3<T, P> const & x);
  		GLM_FUNC_DECL explicit tmat4x4(tmat2x3<T, P> const & x);
  		GLM_FUNC_DECL explicit tmat4x4(tmat3x2<T, P> const & x);
  		GLM_FUNC_DECL explicit tmat4x4(tmat2x4<T, P> const & x);
  		GLM_FUNC_DECL explicit tmat4x4(tmat4x2<T, P> const & x);
  		GLM_FUNC_DECL explicit tmat4x4(tmat3x4<T, P> const & x);
  		GLM_FUNC_DECL explicit tmat4x4(tmat4x3<T, P> const & x);
  
  		// Accesses
  		GLM_FUNC_DECL col_type & operator[](length_t i);
  		GLM_FUNC_DECL col_type const & operator[](length_t i) const;
  
  		// Unary updatable operators
  		GLM_FUNC_DECL tmat4x4<T, P> & operator=  (tmat4x4<T, P> const & m);
  		template <typename U>
  		GLM_FUNC_DECL tmat4x4<T, P> & operator=  (tmat4x4<U, P> const & m);
  		template <typename U>
  		GLM_FUNC_DECL tmat4x4<T, P> & operator+= (U s);
  		template <typename U>
  		GLM_FUNC_DECL tmat4x4<T, P> & operator+= (tmat4x4<U, P> const & m);
  		template <typename U>
  		GLM_FUNC_DECL tmat4x4<T, P> & operator-= (U s);
  		template <typename U>
  		GLM_FUNC_DECL tmat4x4<T, P> & operator-= (tmat4x4<U, P> const & m);
  		template <typename U>
  		GLM_FUNC_DECL tmat4x4<T, P> & operator*= (U s);
  		template <typename U>
  		GLM_FUNC_DECL tmat4x4<T, P> & operator*= (tmat4x4<U, P> const & m);
  		template <typename U>
  		GLM_FUNC_DECL tmat4x4<T, P> & operator/= (U s);
  		template <typename U>
  		GLM_FUNC_DECL tmat4x4<T, P> & operator/= (tmat4x4<U, P> const & m);
  
  		//////////////////////////////////////
  		// Increment and decrement operators
  
  		GLM_FUNC_DECL tmat4x4<T, P> & operator++ ();
  		GLM_FUNC_DECL tmat4x4<T, P> & operator-- ();
  		GLM_FUNC_DECL tmat4x4<T, P> operator++(int);
  		GLM_FUNC_DECL tmat4x4<T, P> operator--(int);
  	};
  
  	template <typename T, precision P>
  	GLM_FUNC_DECL tmat4x4<T, P> compute_inverse_mat4(tmat4x4<T, P> const & m);
  
  	// Binary operators
  	template <typename T, precision P>
  	GLM_FUNC_DECL tmat4x4<T, P> operator+ (
  		tmat4x4<T, P> const & m,
  		T const & s);
  
  	template <typename T, precision P>
  	GLM_FUNC_DECL tmat4x4<T, P> operator+ (
  		T const & s,
  		tmat4x4<T, P> const & m);
  
  	template <typename T, precision P> 
  	GLM_FUNC_DECL tmat4x4<T, P> operator+ (
  		tmat4x4<T, P> const & m1, 
  		tmat4x4<T, P> const & m2);
  
  	template <typename T, precision P> 
  	GLM_FUNC_DECL tmat4x4<T, P> operator- (
  		tmat4x4<T, P> const & m, 
  		T const & s);
  
  	template <typename T, precision P> 
  	GLM_FUNC_DECL tmat4x4<T, P> operator- (
  		T const & s,
  		tmat4x4<T, P> const & m);
  
  	template <typename T, precision P>
  	GLM_FUNC_DECL tmat4x4<T, P> operator- (
  		tmat4x4<T, P> const & m1,
  		tmat4x4<T, P> const & m2);
  
  	template <typename T, precision P>
  	GLM_FUNC_DECL tmat4x4<T, P> operator* (
  		tmat4x4<T, P> const & m,
  		T const & s);
  
  	template <typename T, precision P>
  	GLM_FUNC_DECL tmat4x4<T, P> operator* (
  		T const & s,
  		tmat4x4<T, P> const & m);
  
  	template <typename T, precision P>
  	GLM_FUNC_DECL typename tmat4x4<T, P>::col_type operator* (
  		tmat4x4<T, P> const & m,
  		typename tmat4x4<T, P>::row_type const & v);
  
  	template <typename T, precision P>
  	GLM_FUNC_DECL typename tmat4x4<T, P>::row_type operator* (
  		typename tmat4x4<T, P>::col_type const & v,
  		tmat4x4<T, P> const & m);
  		
  	template <typename T, precision P>
  	GLM_FUNC_DECL tmat2x4<T, P> operator* (
  		tmat4x4<T, P> const & m1,
  		tmat2x4<T, P> const & m2);
  
  	template <typename T, precision P>
  	GLM_FUNC_DECL tmat3x4<T, P> operator* (
  		tmat4x4<T, P> const & m1,
  		tmat3x4<T, P> const & m2);
  
  	template <typename T, precision P>
  	GLM_FUNC_DECL tmat4x4<T, P> operator* (
  		tmat4x4<T, P> const & m1,
  		tmat4x4<T, P> const & m2);
  
  	template <typename T, precision P>
  	GLM_FUNC_DECL tmat4x4<T, P> operator/ (
  		tmat4x4<T, P> const & m,
  		T const & s);
  
  	template <typename T, precision P>
  	GLM_FUNC_DECL tmat4x4<T, P> operator/ (
  		T const & s,
  		tmat4x4<T, P> const & m);
  
  	template <typename T, precision P>
  	GLM_FUNC_DECL typename tmat4x4<T, P>::col_type operator/ (
  		tmat4x4<T, P> const & m,
  		typename tmat4x4<T, P>::row_type const & v);
  
  	template <typename T, precision P>
  	GLM_FUNC_DECL typename tmat4x4<T, P>::row_type operator/ (
  		typename tmat4x4<T, P>::col_type & v,
  		tmat4x4<T, P> const & m);
  
  	template <typename T, precision P>
  	GLM_FUNC_DECL tmat4x4<T, P> operator/ (
  		tmat4x4<T, P> const & m1,
  		tmat4x4<T, P> const & m2);
  
  	// Unary constant operators
  	template <typename T, precision P>
  	GLM_FUNC_DECL tmat4x4<T, P> const operator-  (
  		tmat4x4<T, P> const & m);
  
  }//namespace detail
  }//namespace glm
  
  #ifndef GLM_EXTERNAL_TEMPLATE
  #include "type_mat4x4.inl"
  #endif//GLM_EXTERNAL_TEMPLATE
  
  #endif//glm_core_type_mat4x4
  