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0001 #ifndef TrackAssociator_CachedTrajectory_h
0002 #define TrackAssociator_CachedTrajectory_h 1
0003 // -*- C++ -*-
0004 //
0005 // Package:    TrackAssociator
0006 // Class:      CachedTrajectory
0007 //
0008 /*
0009 
0010  Description: CachedTrajectory is a transient class, which stores a set of
0011  * trajectory states that can be used as starting points when there is need
0012  * propagate the same track to a number of different surfaces, which might 
0013  * not be know in advance.
0014 
0015  Implementation:
0016      <Notes on implementation>
0017 */
0018 //
0019 // Original Author:  Dmytro Kovalskyi
0020 //         Created:  Fri Apr 21 10:59:41 PDT 2006
0021 //
0022 //
0023 
0024 #include "TrackingTools/TrackAssociator/interface/DetIdAssociator.h"
0025 #include "TrackingTools/TrackAssociator/interface/TAMuonChamberMatch.h"
0026 #include "TrackingTools/TrackAssociator/interface/FiducialVolume.h"
0027 #include "TrackPropagation/SteppingHelixPropagator/interface/SteppingHelixStateInfo.h"
0028 #include "Geometry/CommonDetUnit/interface/GlobalTrackingGeometry.h"
0029 #include "Geometry/CommonDetUnit/interface/GeomDet.h"
0030 #include "DataFormats/DetId/interface/DetId.h"
0031 #include <deque>
0032 #include "FWCore/Utilities/interface/Visibility.h"
0033 
0034 std::vector<SteppingHelixStateInfo> propagateThoughFromIP(const SteppingHelixStateInfo& state,
0035                                                           const Propagator* prop,
0036                                                           const FiducialVolume& volume,
0037                                                           int nsteps,
0038                                                           float step,
0039                                                           float minR,
0040                                                           float minZ,
0041                                                           float maxR,
0042                                                           float maxZ);
0043 
0044 class CachedTrajectory {
0045 public:
0046   const std::vector<SteppingHelixStateInfo>& getEcalTrajectory() const;
0047   const std::vector<SteppingHelixStateInfo>& getHcalTrajectory() const;
0048   const std::vector<SteppingHelixStateInfo>& getHOTrajectory() const;
0049   const std::vector<SteppingHelixStateInfo>& getPreshowerTrajectory() const;
0050 
0051 private:
0052   friend class TrackDetectorAssociator;
0053   friend std::vector<SteppingHelixStateInfo> propagateThoughFromIP(const SteppingHelixStateInfo& state,
0054                                                                    const Propagator* ptr,
0055                                                                    const FiducialVolume& volume,
0056                                                                    int nsteps,
0057                                                                    float step,
0058                                                                    float minR,
0059                                                                    float minZ,
0060                                                                    float maxR,
0061                                                                    float maxZ);
0062 
0063   CachedTrajectory();
0064   enum TrajectorType { IpToEcal, IpToHcal, IpToHO, FullTrajectory };
0065   enum WideTrajectoryType { Ecal, Hcal, HO };
0066 
0067   void reset_trajectory() dso_internal;
0068 
0069   /// propagate through the whole detector, returns true if successful
0070   bool propagateAll(const SteppingHelixStateInfo& initialState) dso_internal;
0071 
0072   void propagateForward(SteppingHelixStateInfo& state, float distance) dso_internal;
0073   void propagate(SteppingHelixStateInfo& state, const Plane& plane) dso_internal;
0074   void propagate(SteppingHelixStateInfo& state, const Cylinder& cylinder) dso_internal;
0075 
0076   /// get fast to a given DetId surface using cached trajectory
0077   TrajectoryStateOnSurface propagate(const Plane* plane) dso_internal;
0078 
0079   /// calculate trajectory change (Theta,Phi)
0080   /// delta = final - original
0081   std::pair<float, float> trajectoryDelta(TrajectorType) dso_internal;
0082 
0083   void setPropagator(const Propagator* ptr) dso_internal { propagator_ = ptr; }
0084   void setStateAtIP(const SteppingHelixStateInfo& state) dso_internal { stateAtIP_ = state; }
0085 
0086   /// get a set of points representing the trajectory between two cylinders
0087   /// of radius R1 and R2 and length L1 and L2. Parameter steps defines
0088   /// maximal number of steps in the detector.
0089   void getTrajectory(std::vector<SteppingHelixStateInfo>&, const FiducialVolume&, int steps = 4) dso_internal;
0090 
0091   void findEcalTrajectory(const FiducialVolume&) dso_internal;
0092   void findHcalTrajectory(const FiducialVolume&) dso_internal;
0093   void findHOTrajectory(const FiducialVolume&) dso_internal;
0094   void findPreshowerTrajectory(const FiducialVolume&) dso_internal;
0095 
0096   std::vector<GlobalPoint>* getWideTrajectory(const std::vector<SteppingHelixStateInfo>&,
0097                                               WideTrajectoryType) dso_internal;
0098 
0099   SteppingHelixStateInfo getStateAtEcal() dso_internal;
0100   SteppingHelixStateInfo getStateAtPreshower() dso_internal;
0101   SteppingHelixStateInfo getStateAtHcal() dso_internal;
0102   SteppingHelixStateInfo getStateAtHO() dso_internal;
0103 
0104   //get the innermost state of the whole trajectory
0105   SteppingHelixStateInfo getInnerState() dso_internal;
0106   //get the outermost state of the whole trajectory
0107   SteppingHelixStateInfo getOuterState() dso_internal;
0108 
0109   // specify the detector global boundaries to limit the propagator
0110   // units: cm
0111   // HINT: use lower bounds to limit propagateAll() action within
0112   //       smaller region, such as ECAL for example
0113   void setMaxDetectorRadius(float r = 800.) dso_internal { maxRho_ = r; }
0114   void setMaxDetectorLength(float l = 2200.) dso_internal { maxZ_ = l / 2.; }
0115   void setMaxHORadius(float r = 800.) dso_internal { HOmaxRho_ = r; }
0116   void setMaxHOLength(float l = 2200.) dso_internal { HOmaxZ_ = l / 2.; }
0117   void setMinDetectorRadius(float r = 0.) dso_internal { minRho_ = r; }
0118   void setMinDetectorLength(float l = 0.) dso_internal { minZ_ = l / 2.; }
0119 
0120   void setPropagationStep(float s = 20.) { step_ = s; }
0121   float getPropagationStep() const dso_internal { return step_; }
0122 
0123 protected:
0124   static int sign(float number) dso_internal {
0125     if (number == 0)
0126       return 0;
0127     if (number > 0)
0128       return 1;
0129     else
0130       return -1;
0131   }
0132 
0133   std::pair<float, float> delta(const double& theta1, const double& theta2, const double& phi1, const double& phi2)
0134       dso_internal;
0135 
0136   float distance(const Plane* plane, int index) dso_internal {
0137     if (index < 0 || fullTrajectory_.empty() || (unsigned int)index >= fullTrajectory_.size())
0138       return 0;
0139     return plane->localZ(fullTrajectory_[index].position());
0140   }
0141 
0142   std::deque<SteppingHelixStateInfo> fullTrajectory_;
0143   std::vector<SteppingHelixStateInfo> ecalTrajectory_;
0144   std::vector<SteppingHelixStateInfo> hcalTrajectory_;
0145   std::vector<SteppingHelixStateInfo> hoTrajectory_;
0146   std::vector<SteppingHelixStateInfo> preshowerTrajectory_;
0147   std::vector<GlobalPoint> wideEcalTrajectory_;
0148   std::vector<GlobalPoint> wideHcalTrajectory_;
0149   std::vector<GlobalPoint> wideHOTrajectory_;
0150   SteppingHelixStateInfo stateAtIP_;
0151 
0152   bool fullTrajectoryFilled_;
0153 
0154   const Propagator* propagator_;
0155 
0156   float maxRho_;
0157   float maxZ_;
0158   float HOmaxRho_;
0159   float HOmaxZ_;
0160   float minRho_;
0161   float minZ_;
0162   float step_;
0163 };
0164 #endif