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// $Id: FillerConversionsDecay.cc,v 1.4 2011/04/23 19:13:14 bendavid Exp $
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#include "MitProd/TreeFiller/interface/FillerConversionsDecay.h"
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#include "DataFormats/Common/interface/RefToPtr.h"
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#include "MitEdm/DataFormats/interface/RefToBaseToPtr.h"
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#include "MitAna/DataTree/interface/StableDataCol.h"
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#include "MitAna/DataTree/interface/DecayDataCol.h"
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#include "MitAna/DataTree/interface/DecayParticleCol.h"
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#include "MitAna/DataTree/interface/Names.h"
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#include "MitProd/ObjectService/interface/ObjectService.h"
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#include "TrackingTools/IPTools/interface/IPTools.h"
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#include "TrackingTools/TransientTrack/interface/TransientTrackBuilder.h"
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#include "TrackingTools/TransientTrack/plugins/TransientTrackBuilderESProducer.h"
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#include "TrackingTools/TrajectoryState/interface/TrajectoryStateOnSurface.h"
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#include "TrackingTools/GeomPropagators/interface/AnalyticalTrajectoryExtrapolatorToLine.h"
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#include "TrackingTools/GeomPropagators/interface/AnalyticalImpactPointExtrapolator.h"
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#include "DataFormats/GeometryCommonDetAlgo/interface/Measurement1D.h"
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#include "TrackingTools/TransientTrack/interface/TransientTrack.h"
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#include "RecoVertex/VertexPrimitives/interface/ConvertToFromReco.h"
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#include "MagneticField/UniformEngine/src/UniformMagneticField.h"
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using namespace std;
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using namespace edm;
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using namespace mithep;
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//--------------------------------------------------------------------------------------------------
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FillerConversionsDecay::FillerConversionsDecay(const ParameterSet &cfg, const char *name, bool active) :
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BaseFiller(cfg,name,active),
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edmName_(Conf().getUntrackedParameter<string>("edmName","conversions")),
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mitName_(Conf().getUntrackedParameter<string>("mitName","Conversions")),
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stableDataName_(mitName_ + "_StableDatas"),
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stablePartMapNames_(Conf().exists("stablePartMaps") ?
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Conf().getUntrackedParameter<vector<string> >("stablePartMaps") :
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vector<string>()),
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conversionMapName_(Conf().getUntrackedParameter<string>("conversionMapName",
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Form("%sMapName",mitName_.c_str()))),
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decays_(new mithep::DecayParticleArr(250)),
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stableData_(new mithep::StableDataArr(500)),
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conversionMap_(new mithep::ConversionDecayMap)
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{
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// Constructor.
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}
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//--------------------------------------------------------------------------------------------------
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FillerConversionsDecay::~FillerConversionsDecay()
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{
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// Destructor.
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delete decays_;
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delete stableData_;
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delete conversionMap_;
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}
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//--------------------------------------------------------------------------------------------------
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void FillerConversionsDecay::BookDataBlock(TreeWriter &tws)
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{
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// Add conversions to tree. Publish and get our objects.
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tws.AddBranch(mitName_, &decays_);
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OS()->add<mithep::DecayParticleArr>(decays_,mitName_);
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tws.AddBranch(stableDataName_, &stableData_);
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OS()->add<mithep::StableDataArr>(stableData_,stableDataName_);
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if (!conversionMapName_.empty()) {
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conversionMap_->SetBrName(mitName_);
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OS()->add(conversionMap_,conversionMapName_);
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}
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for (std::vector<std::string>::const_iterator bmapName = stablePartMapNames_.begin();
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bmapName!=stablePartMapNames_.end(); ++bmapName) {
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if (!bmapName->empty()) {
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const TrackPartMap *map = OS()->get<TrackPartMap>(*bmapName);
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if (map) {
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stablePartMaps_.push_back(map);
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AddBranchDep(mitName_,map->GetBrName());
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}
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}
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}
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}
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//--------------------------------------------------------------------------------------------------
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void FillerConversionsDecay::FillDataBlock(const edm::Event &event,
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const edm::EventSetup &setup)
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{
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// Fill conversions data structure and maps.
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decays_->Delete();
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stableData_->Delete();
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conversionMap_->Reset();
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//get beamspot
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edm::Handle<reco::BeamSpot> bsHandle;
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event.getByLabel("offlineBeamSpot", bsHandle);
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const reco::BeamSpot &thebs = *bsHandle.product();
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//transient track producer
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edm::ESHandle<TransientTrackBuilder> hTransientTrackBuilder;
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setup.get<TransientTrackRecord>().get("TransientTrackBuilder",hTransientTrackBuilder);
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const TransientTrackBuilder *transientTrackBuilder = hTransientTrackBuilder.product();
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Handle<reco::ConversionCollection> hConversionProduct;
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GetProduct(edmName_, hConversionProduct, event);
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conversionMap_->SetEdmProductId(hConversionProduct.id().id());
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const reco::ConversionCollection inConversions = *(hConversionProduct.product());
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for (reco::ConversionCollection::const_iterator inConversion = inConversions.begin();
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inConversion != inConversions.end(); ++inConversion) {
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mithep::DecayParticle *outConversion = decays_->Allocate();
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new (outConversion) mithep::DecayParticle(22);
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math::XYZTLorentzVectorD convP4(inConversion->refittedPair4Momentum());
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FourVector p4Fitted(convP4.px(),convP4.py(),convP4.pz(),convP4.energy());
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outConversion->SetMom(p4Fitted);
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const reco::Vertex &vtx = inConversion->conversionVertex();
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ThreeVector vtxPos(vtx.x(),vtx.y(),vtx.z());
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GlobalPoint vtxPoint(vtx.x(),vtx.y(),vtx.z());
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double dlz = vtxPos.z()*TMath::Abs(p4Fitted.Pz())/p4Fitted.Pz();
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ThreeVector momPerp(p4Fitted.Px(),p4Fitted.Py(),0);
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ThreeVector posPerp(vtxPos.x(),vtxPos.y(),0);
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double dl = momPerp.Dot(posPerp)/momPerp.R();
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double dxy = momPerp.Cross(vtxPos).Z()/p4Fitted.Pt();
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outConversion->SetLz(dlz);
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outConversion->SetLxy(dl);
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outConversion->SetDxy(dxy);
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outConversion->SetChi2(vtx.chi2());
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outConversion->SetNdof((Int_t)vtx.ndof());
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outConversion->SetNSharedHits(inConversion->nSharedHits());
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const std::vector<reco::TrackBaseRef> &trackRefs = inConversion->tracks();
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const std::vector<reco::Track> &refittedTracks = vtx.refittedTracks();
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const std::vector<uint8_t> &nHitsBeforeVtx = inConversion->nHitsBeforeVtx();
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const std::vector<Measurement1DFloat> &dlClosestHitToVtx = inConversion->dlClosestHitToVtx();
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//fill conversion quality mask
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ConversionQuality &outQuality = outConversion->Quality();
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for (uint i=0; i<16; ++i) {
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outQuality.SetQuality(ConversionQuality::EQuality(i),inConversion->quality(reco::Conversion::ConversionQuality(i)));
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}
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//fill daughters
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double zbeamlineerr = -99.;
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if (stablePartMaps_.size()) {
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for (uint i=0; i<trackRefs.size(); ++i) {
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const reco::TrackBaseRef &trackRef = trackRefs.at(i);
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const reco::Track *refittedTrack = 0;
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if (refittedTracks.size()>i)
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refittedTrack = &refittedTracks.at(i);
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else
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refittedTrack = trackRef.get();
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//fill dzError at beamline (take from refitted first track normally)
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if (zbeamlineerr<0.) {
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const reco::TransientTrack &tt = transientTrackBuilder->build(*refittedTrack);
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//null b-field
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const UniformMagneticField nullField(0.0);
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TransverseImpactPointExtrapolator extrapolator(&nullField);
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//const TrajectoryStateOnSurface &bsstate = extrapolator.extrapolate(tt.stateOnSurface(vtxPoint), RecoVertex::convertPos(thebs.position()));
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const FreeTrajectoryState &initialfts = tt.initialFreeState();
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const GlobalTrajectoryParameters trackgtp(initialfts.position(),initialfts.momentum(),initialfts.charge(),&nullField);
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const FreeTrajectoryState trackfts(trackgtp,initialfts.cartesianError(),initialfts.curvilinearError());
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const TrajectoryStateOnSurface &bsstate = extrapolator.extrapolate(trackfts, RecoVertex::convertPos(thebs.position()));
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if (bsstate.isValid()) {
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double zbeamline = bsstate.globalPosition().z();
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zbeamlineerr = sqrt((bsstate.cartesianError().matrix())(2,2));
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if (0) {
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math::XYZVector mom(inConversion->refittedPairMomentum());
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double zbeamlineconv = (vtx.z()) - ((vtx.x()-thebs.position().x())*mom.x()+(vtx.y()-thebs.position().y())*mom.y())/mom.rho() * mom.z()/mom.rho();
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double zbeamlinetrk = (refittedTrack->vertex().z()) - ((refittedTrack->vertex().x()-thebs.position().x())*refittedTrack->momentum().x()+(refittedTrack->vertex().y()-thebs.position().y())*refittedTrack->momentum().y())/refittedTrack->momentum().rho() * refittedTrack->momentum().z()/refittedTrack->momentum().rho();
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printf("zbeamlineconv = %5f, zbeamlinetrk = %5f, zbeamline = %5f, zbeamlineerr = %5f\n",zbeamlineconv,zbeamlinetrk,zbeamline,zbeamlineerr);
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}
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}
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}
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const mithep::Particle *daughter = GetMitParticle(mitedm::refToBaseToPtr(trackRef));
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mithep::StableData *outStable = stableData_->Allocate();
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new (outStable) mithep::StableData(daughter,
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refittedTrack->px(),refittedTrack->py(),refittedTrack->pz());
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if (nHitsBeforeVtx.size()>i) {
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outStable->SetNHitsBeforeVtx(nHitsBeforeVtx.at(i));
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}
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if (dlClosestHitToVtx.size()>i) {
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outStable->SetDlClosestHitToVtx(dlClosestHitToVtx.at(i).value());
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outStable->SetDlClosestHitToVtxErr(dlClosestHitToVtx.at(i).error());
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}
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outConversion->AddDaughterData(outStable);
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}
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}
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outConversion->SetDzBeamlineError(zbeamlineerr);
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reco::ConversionRef theRef(hConversionProduct, inConversion-inConversions.begin());
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conversionMap_->Add(theRef, outConversion);
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}
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decays_->Trim();
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}
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//--------------------------------------------------------------------------------------------------
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mithep::Particle *FillerConversionsDecay::GetMitParticle(edm::Ptr<reco::Track> ptr) const
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{
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// Return our particle referenced by the edm pointer.
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mithep::Particle *mitPart = 0;
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for (std::vector<const mithep::TrackPartMap*>::const_iterator bmap = stablePartMaps_.begin();
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bmap!=stablePartMaps_.end(); ++bmap) {
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const mithep::TrackPartMap *theMap = *bmap;
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if (theMap->HasMit(ptr)) {
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mitPart = theMap->GetMit(ptr);
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return mitPart;
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}
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}
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if (!mitPart)
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throw edm::Exception(edm::errors::Configuration, "FillerConversionsDecay::FillDataBlock()\n")
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<< "Error! MITHEP Object "
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<< "not found in AssociationMaps (" << typeid(*this).name() << ")." << std::endl;
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return mitPart;
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}
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