DTResolutionAnalysisTask.cc

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/*
 *  See header file for a description of this class.
 *
 *  \author G. Cerminara - INFN Torino
 */

#include "DTResolutionAnalysisTask.h"

// Framework
#include "FWCore/Framework/interface/Event.h"
#include "FWCore/Framework/interface/EventSetup.h"
#include "FWCore/ServiceRegistry/interface/Service.h"
#include "FWCore/Framework/interface/LuminosityBlock.h"
#include "FWCore/ParameterSet/interface/ParameterSet.h"

#include "FWCore/MessageLogger/interface/MessageLogger.h"

#include "DQMServices/Core/interface/DQMStore.h"
#include "DQMServices/Core/interface/MonitorElement.h"

//Geometry
#include "Geometry/DTGeometry/interface/DTGeometry.h"
#include "Geometry/Records/interface/MuonGeometryRecord.h"

//RecHit
#include "DataFormats/DTRecHit/interface/DTRecHitCollection.h"


#include <iterator>

using namespace edm;
using namespace std;

DTResolutionAnalysisTask::DTResolutionAnalysisTask(const ParameterSet& pset) {

  edm::LogVerbatim ("DTDQM|DTMonitorModule|DTResolutionAnalysisTask") << "[DTResolutionAnalysisTask] Constructor called!" << endl;

  // the name of the 4D rec hits collection
  recHits4DToken_ = consumes<DTRecSegment4DCollection>(
      edm::InputTag(pset.getParameter<string>("recHits4DLabel")));

  prescaleFactor  = pset.getUntrackedParameter<int>("diagnosticPrescale", 1);
  resetCycle = pset.getUntrackedParameter<int>("ResetCycle", -1);
  // top folder for the histograms in DQMStore
  topHistoFolder  = pset.getUntrackedParameter<string>("topHistoFolder","DT/02-Segments");

  thePhiHitsCut = pset.getUntrackedParameter<u_int32_t>("phiHitsCut",8);
  theZHitsCut = pset.getUntrackedParameter<u_int32_t>("zHitsCut",4);

}


DTResolutionAnalysisTask::~DTResolutionAnalysisTask(){

  edm::LogVerbatim ("DTDQM|DTMonitorModule|DTResolutionAnalysisTask") << "[DTResolutionAnalysisTask] Destructor called!" << endl;

}

void DTResolutionAnalysisTask::dqmBeginRun(const Run& run, const EventSetup& setup) {

  // Get the DT Geometry
  setup.get<MuonGeometryRecord>().get(dtGeom);

}

void DTResolutionAnalysisTask::bookHistograms(DQMStore::IBooker & ibooker,
                                             edm::Run const & iRun,
                                             edm::EventSetup const & /* iSetup */) {

  // Book the histograms
  vector<const DTChamber*> chambers = dtGeom->chambers();
  for(vector<const DTChamber*>::const_iterator chamber = chambers.begin();
      chamber != chambers.end(); ++chamber) {  // Loop over all chambers
    DTChamberId dtChId = (*chamber)->id();
    for(int sl = 1; sl <= 3; ++sl) { // Loop over SLs
      if(dtChId.station() == 4 && sl == 2) continue;
      const  DTSuperLayerId dtSLId(dtChId,sl);
      bookHistos(ibooker,dtSLId);
    }
  }

}




void DTResolutionAnalysisTask::beginLuminosityBlock(const LuminosityBlock& lumiSeg,
                            const EventSetup& context) {

  edm::LogVerbatim ("DTDQM|DTMonitorModule|DTResolutionAnalysisTask") << "[DTResolutionTask]: Begin of LS transition"<<endl;

  if(resetCycle != -1 && lumiSeg.id().luminosityBlock() % resetCycle == 0) {
    for(map<DTSuperLayerId, vector<MonitorElement*> > ::const_iterator histo = histosPerSL.begin();
    histo != histosPerSL.end();
    histo++) {
      int size = (*histo).second.size();
      for(int i=0; i<size; i++){
    (*histo).second[i]->Reset();
      }
    }
  }
}

void DTResolutionAnalysisTask::analyze(const edm::Event& event, const edm::EventSetup& setup) {

  edm::LogVerbatim ("DTDQM|DTMonitorModule|DTResolutionAnalysisTask") << "[DTResolutionAnalysisTask] Analyze #Run: " << event.id().run()
     << " #Event: " << event.id().event() << endl;


  // Get the 4D segment collection from the event
  edm::Handle<DTRecSegment4DCollection> all4DSegments;
  event.getByToken(recHits4DToken_, all4DSegments);

  // check the validity of the collection
  if(!all4DSegments.isValid()) return;

  // Loop over all chambers containing a segment
  DTRecSegment4DCollection::id_iterator chamberId;
  for (chamberId = all4DSegments->id_begin();
       chamberId != all4DSegments->id_end();
       ++chamberId) {
    // Get the range for the corresponding ChamerId
    DTRecSegment4DCollection::range  range = all4DSegments->get(*chamberId);

    // Get the chamber
    const DTChamber* chamber = dtGeom->chamber(*chamberId);

    // Loop over the rechits of this ChamerId
    for (DTRecSegment4DCollection::const_iterator segment4D = range.first;
     segment4D!=range.second;
     ++segment4D) {

      // If Statio != 4 skip RecHits with dimension != 4
      // For the Station 4 consider 2D RecHits
      if((*chamberId).station() != 4 && (*segment4D).dimension() != 4) {
    edm::LogVerbatim ("DTDQM|DTMonitorModule|DTResolutionAnalysisTask") << "[DTResolutionAnalysisTask]***Warning: RecSegment dimension is not 4 but "
           << (*segment4D).dimension() << "!" << endl;
    continue;
      } else if((*chamberId).station() == 4 && (*segment4D).dimension() != 2) {
    edm::LogVerbatim ("DTDQM|DTMonitorModule|DTResolutionAnalysisTask") << "[DTResolutionAnalysisTask]***Warning: RecSegment dimension is not 2 but "
           << (*segment4D).dimension() << "!" << endl;
    continue;
      }


      // Get all 1D RecHits at step 3 within the 4D segment
      vector<DTRecHit1D> recHits1D_S3;


      // Get 1D RecHits at Step 3 and select only events with
      // 8 hits in phi and 4 hits in theta (if any)

      if((*segment4D).hasPhi()) { // has phi component
    const DTChamberRecSegment2D* phiSeg = (*segment4D).phiSegment();
    vector<DTRecHit1D> phiRecHits = phiSeg->specificRecHits();

    if(phiRecHits.size() < thePhiHitsCut) {
      continue;
    }
    copy(phiRecHits.begin(), phiRecHits.end(), back_inserter(recHits1D_S3));
      } else {

      }

      if((*segment4D).hasZed()) {
    const DTSLRecSegment2D* zSeg = (*segment4D).zSegment();
    vector<DTRecHit1D> zRecHits = zSeg->specificRecHits();
    if(zRecHits.size() < theZHitsCut) {

      continue;
    }
    copy(zRecHits.begin(), zRecHits.end(), back_inserter(recHits1D_S3));
      }

      // Loop over 1D RecHit inside 4D segment
      for(vector<DTRecHit1D>::const_iterator recHit1D = recHits1D_S3.begin();
      recHit1D != recHits1D_S3.end();
      recHit1D++) {
    const DTWireId wireId = (*recHit1D).wireId();

    // Get the layer and the wire position
    const DTLayer* layer = chamber->superLayer(wireId.superlayerId())->layer(wireId.layerId());
    float wireX = layer->specificTopology().wirePosition(wireId.wire());

    // Distance of the 1D rechit from the wire
    float distRecHitToWire = fabs(wireX - (*recHit1D).localPosition().x());

    // Extrapolate the segment to the z of the wire

    // Get wire position in chamber RF
    LocalPoint wirePosInLay(wireX,(*recHit1D).localPosition().y(),(*recHit1D).localPosition().z());
    GlobalPoint wirePosGlob = layer->toGlobal(wirePosInLay);
    LocalPoint wirePosInChamber = chamber->toLocal(wirePosGlob);

    // Segment position at Wire z in chamber local frame
    LocalPoint segPosAtZWire = (*segment4D).localPosition()
      + (*segment4D).localDirection()*wirePosInChamber.z()/cos((*segment4D).localDirection().theta());

    // Compute the distance of the segment from the wire
    int sl = wireId.superlayer();

    double distSegmToWire = -1;
    if(sl == 1 || sl == 3) {
      // RPhi SL
      distSegmToWire = fabs(wirePosInChamber.x() - segPosAtZWire.x());
    } else if(sl == 2) {
      // RZ SL
      distSegmToWire = fabs(wirePosInChamber.y() - segPosAtZWire.y());
    }

    if(distSegmToWire > 2.1)
      edm::LogVerbatim ("DTDQM|DTMonitorModule|DTResolutionAnalysisTask") << "  Warning: dist segment-wire: " << distSegmToWire << endl;

    double residual = distRecHitToWire - distSegmToWire;
    // FIXME: Fill the histos
    fillHistos(wireId.superlayerId(), distSegmToWire, residual);

      }// End of loop over 1D RecHit inside 4D segment
    }// End of loop over the rechits of this ChamerId
  }
  // -----------------------------------------------------------------------------
}


// Book a set of histograms for a given SL
void DTResolutionAnalysisTask::bookHistos(DQMStore::IBooker & ibooker, DTSuperLayerId slId) {

  edm::LogVerbatim ("DTDQM|DTMonitorModule|DTResolutionAnalysisTask") << "   Booking histos for SL: " << slId << endl;

  // Compose the chamber name
  stringstream wheel; wheel << slId.wheel();
  stringstream station; station << slId.station();
  stringstream sector; sector << slId.sector();
  stringstream superLayer; superLayer << slId.superlayer();


  string slHistoName =
    "_W" + wheel.str() +
    "_St" + station.str() +
    "_Sec" + sector.str() +
    "_SL" + superLayer.str();

  ibooker.setCurrentFolder(topHistoFolder + "/Wheel" + wheel.str() +
               "/Sector" + sector.str() +
               "/Station" + station.str());
  // Create the monitor elements
  vector<MonitorElement *> histos;
  // Note the order matters
  histos.push_back(ibooker.book1D("hResDist"+slHistoName,
                  "Residuals on the distance from wire (rec_hit - segm_extr) (cm)",
                  200, -0.4, 0.4));
  histosPerSL[slId] = histos;
}


// Fill a set of histograms for a given SL
void DTResolutionAnalysisTask::fillHistos(DTSuperLayerId slId,
                      float distExtr,
                      float residual) {
  vector<MonitorElement *> histos =  histosPerSL[slId];
  histos[0]->Fill(residual);
}

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