vpRzyzVector.cpp

/****************************************************************************
 *
 * $Id: vpRzyzVector.cpp 4632 2014-02-03 17:06:40Z fspindle $
 *
 * This file is part of the ViSP software.
 * Copyright (C) 2005 - 2014 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://www.irisa.fr/lagadic/visp/visp.html for more information.
 * 
 * This software was developed at:
 * INRIA Rennes - Bretagne Atlantique
 * Campus Universitaire de Beaulieu
 * 35042 Rennes Cedex
 * France
 * http://www.irisa.fr/lagadic
 *
 * 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 <visp/vpRzyzVector.h>
#include <math.h>

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

vpRzyzVector::vpRzyzVector(const vpThetaUVector& tu)
{
  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]) ;

    r[0] = phi ;
    r[1] = theta ;
    r[2] = psi ;

    return *this ;
}


vpRzyzVector
vpRzyzVector::buildFrom(const vpThetaUVector& tu)
{

    vpRotationMatrix R ;
    R.buildFrom(tu) ;
    buildFrom(R) ;

    return *this ;
}

vpRzyzVector &vpRzyzVector::operator=(double v)
{
  for (int i=0; i< 3; i++)
    r[i] = v;

  return *this;
}