GFTrackProximity.h

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/* Copyright 2008-2009, Technische Universitaet Muenchen,
   Authors: Christian Hoeppner & Sebastian Neubert

   This file is part of GENFIT.

   GENFIT is free software: you can redistribute it and/or modify
   it under the terms of the GNU Lesser General Public License as published
   by the Free Software Foundation, either version 3 of the License, or
   (at your option) any later version.

   GENFIT 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 Lesser General Public License for more details.

   You should have received a copy of the GNU Lesser General Public License
   along with GENFIT.  If not, see <http://www.gnu.org/licenses/>.
*/
// Description:
//      Function to extrapolate two tracks to common vertex
#ifndef EXTRAPOLATETOPCA_H
#define EXTRAPOLATETOPCA_H

class GFTrack;
class GFAbsTrackRep; 
class TVector3;
TVector3 trackProximity(GFTrack* trk1, GFTrack* trk2);  
TVector3 trackProximity(GFAbsTrackRep* rep1, GFAbsTrackRep* rep2);  

#endif