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#ifndef __CGLA_MAT4X4_H__

#define __CGLA_MAT4X4_H__

#include "ExceptionStandard.h"

#include "CGLA.h"

#include "Vec3f.h"

#include "Vec3Hf.h"

#include "Vec4f.h"

#include "ArithSqMat4x4Float.h"

namespace CGLA 

{

  /** Four by four float matrix.

      This class is useful for transformations such as perspective projections 

      or translation where 3x3 matrices do not suffice. */

  class Mat4x4f: public ArithSqMat4x4Float<Vec4f, Mat4x4f>

    {

    public:

      /// Construct a Mat4x4f from four Vec4f vectors

      Mat4x4f(Vec4f _a, Vec4f _b, Vec4f _c, Vec4f _d): 

	ArithSqMat4x4Float<Vec4f, Mat4x4f> (_a,_b,_c,_d) {}

      /// Construct the NaN matrix

      Mat4x4f() {}

      /// Construct a matrix with identical elements.

      Mat4x4f(float a): 

	ArithSqMat4x4Float<Vec4f, Mat4x4f> (a) {}

    };

  /// 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));

    }

}

#endif