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		/// Construct a matrix with identical elements.

		Mat4x4f(float a): 

			ArithSqMat4x4Float<Vec4f, Mat4x4f> (a) {}

		/// Construct from a pointed to array of 16 floats.

		explicit Mat4x4f(const float* sa): 

			ArithSqMat4x4Float<Vec4f, Mat4x4f> (sa) {}

	};

	/// Create a rotation _matrix. Rotates about one of the major axes.

	Mat4x4f rotation_Mat4x4f(CGLA::Axis axis, float angle);

	/// Create a translation matrix

	Mat4x4f translation_Mat4x4f(const Vec3f&);

	/// Create a scaling matrix.

	Mat4x4f scaling_Mat4x4f(const Vec3f&);

	/// Create an identity matrix.

	inline Mat4x4f identity_Mat4x4f()

	{

		return Mat4x4f(Vec4f(1,0,0,0), 

									 Vec4f(0,1,0,0), 

									 Vec4f(0,0,1,0), 

									 Vec4f(0,0,0,1));

	}

	/** Create a perspective matrix. Assumes the eye is at the origin and

			that we are looking down the negative z axis.

			ACTUALLY THE EYE IS NOT AT THE ORIGIN BUT BEHIND IT. CHECK UP ON

			THIS ONE */

	Mat4x4f perspective_Mat4x4f(float d);