PatternTools/interface/TrajectoryStateClosestToPointBuilder.h

0001 #ifndef TrajectoryStateClosestToPointBuilder_H
0002 #define TrajectoryStateClosestToPointBuilder_H
0003
0004 #include "TrackingTools/TrajectoryState/interface/TrajectoryStateOnSurface.h"
0005 #include "TrackingTools/TrajectoryState/interface/TrajectoryStateClosestToPoint.h"
0006
0007 /**
0008  * This class builds a TrajectoryStateClosestToPoint given an original
0009  * TrajectoryStateOnSurface or FreeTrajectoryState. This new state is then
0010  * defined at the point of closest approach to the reference point.
0011  * In case the propagation was not successful, this state can be invalid.
0012  */
0013
0014 class TrajectoryStateClosestToPointBuilder {
0015 public:
0016   typedef TrajectoryStateOnSurface TSOS;
0017   typedef FreeTrajectoryState FTS;
0018
0019   virtual ~TrajectoryStateClosestToPointBuilder() {}
0020
0021   virtual TrajectoryStateClosestToPoint operator()(const FTS& originalFTS, const GlobalPoint& referencePoint) const = 0;
0022
0023   virtual TrajectoryStateClosestToPoint operator()(const TSOS& originalTSOS,
0024                                                    const GlobalPoint& referencePoint) const = 0;
0025
0026   static bool positionEqual(const GlobalPoint& ptB, const GlobalPoint& ptA) { return ptA == ptB; }
0027
0028 protected:
0029   static TrajectoryStateClosestToPoint constructTSCP(const FTS& originalFTS, const GlobalPoint& referencePoint) {
0030     return TrajectoryStateClosestToPoint(originalFTS, referencePoint);
0031   }
0032 };
0033 #endif