/**********************************************************************
  *                                                                    *
  * Copyright (c) 2003 INFN - Sezione di Napoli                        *
  *                                                                    *
  * For more information (including a list of authors) see             *
  * the README file                                                    *
  *                                                                    *
  * This library is free software; you can redistribute it and/or      *
  * modify it under the terms of the GNU 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 General Public License for more details.                       *
  *                                                                    *
  * You should have received a copy of the GNU General Public License  *
  * along with this library (see file COPYING); if not, write to the   *
  * Free Software Foundation, Inc., 59 Temple Place, Suite 330,        *
  * Boston, MA 02111-1307 USA, or contact the authors.                 *
  *                                                                    *
  **********************************************************************/
#include "StatTools/Pdf/Rotation.h"
#include <cmath>

namespace Pdf {

void Rotation2D::operator()( double & x0, double&  x1 ) const {
  double X = x0 * _cos - x1 * _sin;
  double Y = x0 * _sin + x1 * _cos;
  x0 = X;
  x1 = Y;
}

void Rotation2D::inverse( double & x0, double & x1 ) const {
  double X =   x0 * _cos + x1 * _sin;
  double Y = - x0 * _sin + x1 * _cos;
  x0 = X;
  x1 = Y;
}
  
}