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      This class is useful for transformations such as perspective projections
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      This class is useful for transformations such as perspective projections
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      or translation where 3x3 matrices do not suffice. */
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      or translation where 3x3 matrices do not suffice. */
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  class Mat4x4f: public ArithSqMat4x4Float<Vec4f, Mat4x4f>
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  class Mat4x4f: public ArithSqMat4x4Float<Vec4f, Mat4x4f>
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    {
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    {
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    public:
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    public:
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				/// Construct a Mat4x4f from four Vec4f vectors
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				Mat4x4f(Vec4f _a, Vec4f _b, Vec4f _c, Vec4f _d):
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						ArithSqMat4x4Float<Vec4f, Mat4x4f> (_a,_b,_c,_d) {}
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      /// Construct a Mat4x4f from four Vec4f vectors
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      Mat4x4f(Vec4f _a, Vec4f _b, Vec4f _c, Vec4f _d):
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	ArithSqMat4x4Float<Vec4f, Mat4x4f> (_a,_b,_c,_d) {}
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      /// Construct the NaN matrix
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				/// Construct the NaN matrix
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      Mat4x4f() {}
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				Mat4x4f() {}
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      /// Construct a matrix with identical elements.
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				/// Construct a matrix with identical elements.
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      Mat4x4f(float a):
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				explicit Mat4x4f(float a):
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	ArithSqMat4x4Float<Vec4f, Mat4x4f> (a) {}
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						ArithSqMat4x4Float<Vec4f, Mat4x4f> (a) {}
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    };
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	};
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  /// Create a rotation _matrix. Rotates about one of the major axes.
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		/// Create a rotation _matrix. Rotates about one of the major axes.
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  Mat4x4f rotation_Mat4x4f(CGLA::Axis axis, float angle);
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		Mat4x4f rotation_Mat4x4f(CGLA::Axis axis, float angle);
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  /// Create a translation matrix
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  /// Create a translation matrix
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  Mat4x4f translation_Mat4x4f(const Vec3f&);
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		Mat4x4f translation_Mat4x4f(const Vec3f&);
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  /// Create a scaling matrix.
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		/// Create a scaling matrix.
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  Mat4x4f scaling_Mat4x4f(const Vec3f&);
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		Mat4x4f scaling_Mat4x4f(const Vec3f&);
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  /// Create an identity matrix.
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		/// Create an identity matrix.
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  inline Mat4x4f identity_Mat4x4f()
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  inline Mat4x4f identity_Mat4x4f()
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    {
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	{
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      return Mat4x4f(Vec4f(1,0,0,0),
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      return Mat4x4f(Vec4f(1,0,0,0),
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		     Vec4f(0,1,0,0),
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										 Vec4f(0,1,0,0),
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		     Vec4f(0,0,1,0),
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										 Vec4f(0,0,1,0),
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		     Vec4f(0,0,0,1));
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										 Vec4f(0,0,0,1));
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    }
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    }
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}
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}
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#endif
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#endif
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