Matrix.h

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/***************************************************************************
 *   Copyright (c) 2005 Imetric 3D GmbH                                    *
 *                                                                         *
 *   This file is part of the FreeCAD CAx development system.              *
 *                                                                         *
 *   This library is free software; you can redistribute it and/or         *
 *   modify it under the terms of the GNU Library General Public           *
 *   License as published by the Free Software Foundation; either          *
 *   version 2 of the License, or (at your option) any later version.      *
 *                                                                         *
 *   This library  is distributed in the hope that it will be useful,      *
 *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
 *   GNU Library General Public License for more details.                  *
 *                                                                         *
 *   You should have received a copy of the GNU Library General Public     *
 *   License along with this library; see the file COPYING.LIB. If not,    *
 *   write to the Free Software Foundation, Inc., 59 Temple Place,         *
 *   Suite 330, Boston, MA  02111-1307, USA                                *
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 ***************************************************************************/


#ifndef BASE_MATRIX_H
#define BASE_MATRIX_H

#include <cassert>
#include <cmath>
#include <cstdio>
#include <string>

#include "Vector3D.h"
#include <float.h>

namespace Base {

class BaseExport Matrix4D
{
  typedef float_traits<double> traits_type;

public:
  Matrix4D(void);
  Matrix4D (float a11, float a12, float a13, float a14, 
            float a21, float a22, float a23, float a24,
            float a31, float a32, float a33, float a34,
            float a41, float a42, float a43, float a44 );
  Matrix4D (double a11, double a12, double a13, double a14, 
            double a21, double a22, double a23, double a24,
            double a31, double a32, double a33, double a34,
            double a41, double a42, double a43, double a44 );
  Matrix4D (const Matrix4D& rclMtrx);
  Matrix4D (const Vector3f& rclBase, const Vector3f& rclDir, float fAngle);
  Matrix4D (const Vector3d& rclBase, const Vector3d& rclDir, double fAngle);
  ~Matrix4D () {};


  inline Matrix4D  operator +  (const Matrix4D& rclMtrx) const;
  inline Matrix4D& operator += (const Matrix4D& rclMtrx);
  inline Matrix4D  operator -  (const Matrix4D& rclMtrx) const;
  inline Matrix4D& operator -= (const Matrix4D& rclMtrx);
  inline Matrix4D& operator *= (const Matrix4D& rclMtrx);
  inline Matrix4D& operator =  (const Matrix4D& rclMtrx);
  inline Matrix4D  operator *  (const Matrix4D& rclMtrx) const;
  inline Vector3f  operator *  (const Vector3f& rclVct) const;
  inline Vector3d  operator *  (const Vector3d& rclVct) const;
  inline bool      operator != (const Matrix4D& rclMtrx) const;
  inline bool      operator == (const Matrix4D& rclMtrx) const;
  inline double*   operator [] (unsigned short usNdx);
  inline const double*    operator[] (unsigned short usNdx) const;
  double determinant() const;

  void getGLMatrix  (double dMtrx[16]) const;
  void setGLMatrix  (const double dMtrx[16]);

  unsigned long getMemSpace (void);


  void setToUnity        (void);
  void move         (float x, float y, float z)
  { move(Vector3f(x,y,z)); }
  void move         (const Vector3f& rclVct);
  void move         (const Vector3d& rclVct);
  void scale        (float x, float y, float z)
  { scale(Vector3f(x,y,z)); }
  void scale        (const Vector3f& rclVct);
  void scale        (const Vector3d& rclVct);
  void rotX         (double fAngle);
  void rotY         (double fAngle);
  void rotZ         (double fAngle);
  void rotLine      (const Vector3f& rclVct, float fAngle);
  void rotLine      (const Vector3d& rclVct, double fAngle);
  void rotLine      (const Vector3f& rclBase, const Vector3f& rclDir, float fAngle);
  void rotLine      (const Vector3d& rclBase, const Vector3d& rclDir, double fAngle);
  bool toAxisAngle (Vector3f& rclBase, Vector3f& rclDir, float& fAngle, float& fTranslation) const;
  void transform    (const Vector3f& rclVct, const Matrix4D& rclMtrx);
  void transform    (const Vector3d& rclVct, const Matrix4D& rclMtrx);
  void inverse      (void);
  void inverseGauss (void);
  void transpose    (void);

  void Print        (void) const;
  std::string toString(void) const;
  void fromString (const std::string &str);
  
private:
  double  dMtrx4D[4][4];
};

inline Matrix4D Matrix4D::operator  +  (const Matrix4D& rclMtrx) const
{
  Matrix4D  clMat;
  short     iz, is;

  for (iz = 0; iz < 4; iz++) {
    for (is = 0; is < 4; is++) {
      clMat.dMtrx4D[iz][is] = dMtrx4D[iz][is] + rclMtrx[iz][is];
    }
  }

  return clMat;
}

inline Matrix4D& Matrix4D::operator += (const Matrix4D& rclMtrx)
{
  short     iz, is;

  for (iz = 0; iz < 4; iz++) {
    for (is = 0; is < 4; is++) {
      dMtrx4D[iz][is] += rclMtrx[iz][is];
    }
  }

  return *this;
}

inline Matrix4D Matrix4D::operator  -  (const Matrix4D& rclMtrx) const
{
  Matrix4D  clMat;
  short     iz, is;

  for (iz = 0; iz < 4; iz++) {
    for (is = 0; is < 4; is++) {
      clMat.dMtrx4D[iz][is] = dMtrx4D[iz][is] - rclMtrx[iz][is];
    }
  }

  return clMat;
}

inline Matrix4D& Matrix4D::operator -= (const Matrix4D& rclMtrx)
{
  short     iz, is;

  for (iz = 0; iz < 4; iz++) {
    for (is = 0; is < 4; is++) {
      dMtrx4D[iz][is] -= rclMtrx[iz][is];
    }
  }

  return *this;
}

inline Matrix4D& Matrix4D::operator *= (const Matrix4D& rclMtrx)
{
  Matrix4D  clMat;
  short     ie, iz, is;

  for (iz = 0; iz < 4; iz++)
    for (is = 0; is < 4; is++) {
      clMat.dMtrx4D[iz][is] = 0;
      for (ie = 0; ie < 4; ie++)
        clMat.dMtrx4D[iz][is] += dMtrx4D[iz][ie] * 
                          rclMtrx.dMtrx4D[ie][is];
    }

  (*this) = clMat;
 
  return *this;
}

inline Matrix4D Matrix4D::operator * (const Matrix4D& rclMtrx) const
{
  Matrix4D  clMat;
  short     ie, iz, is;

  for (iz = 0; iz < 4; iz++)
    for (is = 0; is < 4; is++) {
      clMat.dMtrx4D[iz][is] = 0;
      for (ie = 0; ie < 4; ie++)
        clMat.dMtrx4D[iz][is] += dMtrx4D[iz][ie] * 
                          rclMtrx.dMtrx4D[ie][is];
    }

  return clMat;
}

inline Matrix4D& Matrix4D::operator= (const Matrix4D& rclMtrx)
{
  short iz, is;

  for (iz = 0; iz < 4; iz++) {
    for (is = 0; is < 4; is++) {
      dMtrx4D[iz][is] = rclMtrx.dMtrx4D[iz][is];
    }
  }
  
  return *this;
}

inline Vector3f Matrix4D::operator* (const Vector3f& rclVct) const
{
  return Vector3f((float)(dMtrx4D[0][0]*rclVct.x + dMtrx4D[0][1]*rclVct.y +
                          dMtrx4D[0][2]*rclVct.z + dMtrx4D[0][3]),
                  (float)(dMtrx4D[1][0]*rclVct.x + dMtrx4D[1][1]*rclVct.y + 
                          dMtrx4D[1][2]*rclVct.z + dMtrx4D[1][3]),
                  (float)(dMtrx4D[2][0]*rclVct.x + dMtrx4D[2][1]*rclVct.y + 
                          dMtrx4D[2][2]*rclVct.z + dMtrx4D[2][3]));
}

inline Vector3d Matrix4D::operator* (const Vector3d& rclVct) const
{
  return Vector3d((dMtrx4D[0][0]*rclVct.x + dMtrx4D[0][1]*rclVct.y +
                   dMtrx4D[0][2]*rclVct.z + dMtrx4D[0][3]),
                  (dMtrx4D[1][0]*rclVct.x + dMtrx4D[1][1]*rclVct.y + 
                   dMtrx4D[1][2]*rclVct.z + dMtrx4D[1][3]),
                  (dMtrx4D[2][0]*rclVct.x + dMtrx4D[2][1]*rclVct.y + 
                   dMtrx4D[2][2]*rclVct.z + dMtrx4D[2][3]));
}

inline bool Matrix4D::operator== (const Matrix4D& rclMtrx) const
{
  short     iz, is;

  for (iz = 0; iz < 4; iz++)
    for (is = 0; is < 4; is++) 
      if (fabs(dMtrx4D[iz][is] - rclMtrx.dMtrx4D[iz][is]) > traits_type::epsilon())
        return false;

  return true;
}

inline bool Matrix4D::operator!= (const Matrix4D& rclMtrx) const
{
  return !( (*this) == rclMtrx );
}

inline Vector3f& operator*= (Vector3f& rclVect,
                              const Matrix4D& rclMtrx)
{
  rclVect = rclMtrx * rclVect;
  return rclVect;
}

inline double* Matrix4D::operator[] (unsigned short usNdx)
{
  return dMtrx4D[usNdx];
}

inline const double* Matrix4D::operator[] (unsigned short usNdx) const
{
  return dMtrx4D[usNdx];
}

} // namespace Base


#endif // BASE_MATRIX_H