vpRzyzVector.cpp

/****************************************************************************
 *
 * This file is part of the ViSP software.
 * Copyright (C) 2005 - 2015 by Inria. All rights reserved.
 *
 * This software is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * ("GPL") version 2 as published by the Free Software Foundation.
 * See the file LICENSE.txt at the root directory of this source
 * distribution for additional information about the GNU GPL.
 *
 * For using ViSP with software that can not be combined with the GNU
 * GPL, please contact Inria about acquiring a ViSP Professional
 * Edition License.
 *
 * See http://visp.inria.fr for more information.
 *
 * This software was developed at:
 * Inria Rennes - Bretagne Atlantique
 * Campus Universitaire de Beaulieu
 * 35042 Rennes Cedex
 * France
 *
 * If you have questions regarding the use of this file, please contact
 * Inria at visp@inria.fr
 *
 * This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
 * WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
 *
 * Description:
 * Euler angles parameterization for the rotation.
 * Rzyz(phi,theta,psi) = Rot(z,phi)Rot(y,theta)Rot(z,psi)
 *
 * Authors:
 * Eric Marchand
 * Fabien Spindler
 *
 *****************************************************************************/


#include <visp3/core/vpRzyzVector.h>
#include <math.h>

vpRzyzVector::vpRzyzVector()
  : vpRotationVector (3)
{}
vpRzyzVector::vpRzyzVector(const vpRzyzVector &rzyz)
  : vpRotationVector(rzyz)
{}

vpRzyzVector::vpRzyzVector(const double phi, const double theta, const double psi)
  : vpRotationVector (3)
{
  buildFrom(phi, theta, psi);
}

vpRzyzVector::vpRzyzVector(const vpRotationMatrix& R)
  : vpRotationVector (3)
{
  buildFrom(R) ;
}

vpRzyzVector::vpRzyzVector(const vpThetaUVector& tu)
  : vpRotationVector (3)
{
  buildFrom(tu) ;
}

vpRzyzVector
vpRzyzVector::buildFrom(const vpRotationMatrix& R)
{
  double phi ;
  if ((fabs(R[1][2]) < 1e-6) &&(fabs(R[0][2]) < 1e-6))
    phi = 0 ;
  else
    phi = atan2(R[1][2],R[0][2]) ;
  double cphi = cos(phi) ;
  double sphi = sin(phi) ;

  double theta = atan2(cphi*R[0][2]+sphi*R[1][2],R[2][2]);

  double psi = atan2(-sphi*R[0][0]+cphi*R[1][0],-sphi*R[0][1]+cphi*R[1][1]) ;

  buildFrom(phi, theta, psi);

  return *this ;
}


vpRzyzVector
vpRzyzVector::buildFrom(const vpThetaUVector& tu)
{
  vpRotationMatrix R ;
  R.buildFrom(tu) ;
  buildFrom(R) ;

  return *this ;
}

vpRzyzVector &vpRzyzVector::operator=(double v)
{
  for (unsigned int i=0; i< dsize; i++)
    data[i] = v;

  return *this;
}

void
vpRzyzVector::buildFrom(const double phi, const double theta, const double psi)
{
  data[0] = phi ;
  data[1] = theta ;
  data[2] = psi ;
}