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#ifndef __CGLA_MAT2X2D_H__
#define __CGLA_MAT2X2D_H__

#include "Vec2d.h"
#include "ArithSqMat2x2Float.h"


namespace CGLA {

  /** \brief Two by two double matrix. 

        This class is useful for various 
        vector transformations in the plane. */
  class Mat2x2d: public ArithSqMat2x2Float<Vec2d, Mat2x2d>
    {
    public:

      /// Construct a Mat2x2d from two Vec2d vectors.
      Mat2x2d(Vec2d a, Vec2d b): ArithSqMat2x2Float<Vec2d, Mat2x2d> (a,b) {}

      /// Construct a Mat2x2f from four scalars.
      Mat2x2d(double a, double b, double c, double d): 
        ArithSqMat2x2Float<Vec2d, Mat2x2d>(Vec2d(a,b),Vec2d(c,d)) {}
  
      /// Construct the NAN matrix
      Mat2x2d() {}

      /// Construct a Mat2x2d from a single scalar
      explicit Mat2x2d(double a): 
        ArithSqMat2x2Float<Vec2d, Mat2x2d>(a) {}
    };

}
#endif