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C:/temp/src/j2k/Beta/Math/Vector/NotDone/Matrix44.hpp

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class Matrix4By4 {
public:
  Matrix4By4();
  Matrix4By4( const double a1_1, const double a1_2, const double a1_3,
              const double a2_1, const double a2_2, const double a2_3,
              const double a3_1, const double a3_2, const double a3_3,
              const double Xt, const double Yt, const double Zt );

  Matrix4By4( const Matrix4By4& m );

  double operator[]( const tJ2KMath::EMatrixElems  eElem ) const;

  friend Matrix4By4 operator*( const Matrix4By4& left,
                               const Matrix4By4& right );

  void operator*=( const Matrix4By4& m );

  BOOL operator==( const Matrix4By4& m ) const;
  BOOL operator!=( const Matrix4By4& m ) const;

  Matrix4By4& operator=( const Matrix4By4& m );


  void AppendRotation( const double XAngle,
                       const double YAngle,
                       const double ZAngle );

  void AppendRotation( const Vector3D& vecAngles );

  void AppendScale( const double XScale,
                    const double YScale,
                    const double ZScale );

  void AppendScale( const Vector3D& vecScale );

  void AppendTranslation( const double XTrans,
                          const double YTrans,
                          const double ZTrans );

  void AppendTranslation( const Vector3D& vecTrans );

  void SetToIdentity();

  void SetToRotation( const double XDeg,
                      const double YDeg,
                      const double ZDeg );

  void SetToRotation( const Vector3D& vecAngles );

  void SetToScale( const double XScale,
                   const double YScale,
                   const double ZScale );

  void SetToScale( const Vector3D& vecScale );

  void SetToTranslation( const double XTrans,
                         const double YTrans,
                         const double ZTrans );

  void SetToTranslation( const Vector3D& vecTrans );

  void SetToTransposed( const Matrix4By4& mtrxSrc );

  void Transform( Vector3D& vecTarget ) const;

  void Transform( const Vector3D& vecSource, Vector3D& vecTarget ) const;

  void Transpose();

  void Zero();

  private:

  // -------------------------------------------------------------------
  //  Private data members
  //
  //  __aMatrix
  //  __aArray
  // These two members are a union that allow the matrix to be
  // accessed as a two level array and a single level array. When
  // accessing as a single level, the order is row1, row2, row3,
  // row4.
  // -------------------------------------------------------------------
  union
  {
 double    jMatrix[4][4];
 double    jArray[16];
  };

};

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