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//--------------------------------------------------------------------------------------------------
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// $Id: TrackingParticle.h,v 1.4 2012/03/28 12:15:35 paus Exp $
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//
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// TrackingParticle
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//
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// Stores additional MC information for tracking truth.
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//
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// Authors: J.Bendavid
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//--------------------------------------------------------------------------------------------------
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#ifndef MITANA_DATATREE_TRACKINGPARTICLE_H
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#define MITANA_DATATREE_TRACKINGPARTICLE_H
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#include "MitAna/DataCont/interface/Ref.h"
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#include "MitAna/DataTree/interface/Particle.h"
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#include "MitAna/DataTree/interface/MCParticle.h"
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#include "MitAna/DataTree/interface/Track.h"
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#include "MitAna/DataCont/interface/RefArray.h"
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namespace mithep
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{
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class TrackingParticle : public Particle
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{
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public:
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TrackingParticle() {}
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void AddMCPart(const MCParticle *p)
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{ fMCParts.Add(p); ClearCharge(); ClearMom(); }
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const MCParticle *DistinctMother() const;
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const MCParticle *FinalMCPart() const;
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Bool_t HasMCPart(const MCParticle *p) const { return fMCParts.HasObject(p); }
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Bool_t Hit(Track::EHitLayer l) const { return fHits.TestBit(l); }
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const BitMask48 &Hits() const { return fHits; }
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const MCParticle *InitialMCPart() const;
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const MCParticle *MCPart(UInt_t i) const { return fMCParts.At(i); }
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UInt_t NMCParts() const { return fMCParts.Entries(); }
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UInt_t NHits() const { return fHits.NBitsSet(); }
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EObjType ObjType() const { return kTrackingParticle; }
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void SetHit(Track::EHitLayer l) { fHits.SetBit(l); }
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void SetHits(const BitMask48 &hits) { fHits = hits; }
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// Some structural tools
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void Mark(UInt_t i=1) const;
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protected:
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Double_t GetCharge() const;
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void GetMom() const;
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BitMask48 fHits; //storage for sim hit information
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RefArray<MCParticle> fMCParts; //reference to corresponding MCParticles
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ClassDef(TrackingParticle,1) // Generated particle class
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};
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}
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//--------------------------------------------------------------------------------------------------
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inline void mithep::TrackingParticle::Mark(UInt_t ib) const
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{
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// mark myself
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mithep::DataObject::Mark(ib);
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// mark my dependencies if they are there
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fMCParts.Mark(ib);
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}
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//--------------------------------------------------------------------------------------------------
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inline const mithep::MCParticle *mithep::TrackingParticle::DistinctMother() const
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{
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// Return mother, walking up the tree until a particle with a different pdg from this one
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// is found.
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const mithep::MCParticle *mcPart = FinalMCPart();
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if (mcPart)
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return mcPart->DistinctMother();
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return 0;
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}
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//--------------------------------------------------------------------------------------------------
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inline const mithep::MCParticle *mithep::TrackingParticle::FinalMCPart() const
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{
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// Return last MCParticle in the chain
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if (NMCParts()) {
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return MCPart(NMCParts() - 1);
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}
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else {
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return 0;
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}
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}
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//--------------------------------------------------------------------------------------------------
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inline const mithep::MCParticle *mithep::TrackingParticle::InitialMCPart() const
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{
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// Return first MCParticle in the chain
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if (NMCParts()) {
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return MCPart(0);
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}
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else {
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return 0;
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}
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}
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//--------------------------------------------------------------------------------------------------
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inline Double_t mithep::TrackingParticle::GetCharge() const
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{
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// Get charge from first MC particle.
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const MCParticle *firstMCPart = InitialMCPart();
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if (firstMCPart) {
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return firstMCPart->Charge();
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}
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else {
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return 0.0;
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}
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}
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//--------------------------------------------------------------------------------------------------
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inline void mithep::TrackingParticle::GetMom() const
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{
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// Get momentum from first MC particle.
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const MCParticle *firstMCPart = InitialMCPart();
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if (firstMCPart) {
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fCachedMom = firstMCPart->Mom();
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}
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else {
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fCachedMom = FourVectorM();
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}
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}
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#endif
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