PndSdsChargeWeightedPixelMapping.cxx

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#include "PndSdsChargeWeightedPixelMapping.h"
#include "TGeoManager.h"
#include "TGeoBBox.h"
#include "TClonesArray.h"
#include "TMath.h"

PndSdsChargeWeightedPixelMapping::PndSdsChargeWeightedPixelMapping()
:PndSdsPixelBackMapping(),
      fChargeConverter(NULL),
      flx(0.),
      fly(0.),
      fcols(0),
      frows(0)
{}
PndSdsChargeWeightedPixelMapping::PndSdsChargeWeightedPixelMapping(PndGeoHandling* geo)
:PndSdsPixelBackMapping(geo),
      fChargeConverter(NULL),
      flx(0.),
      fly(0.),
      fcols(0),
      frows(0)
{}

PndSdsHit PndSdsChargeWeightedPixelMapping::GetCluster(std::vector<PndSdsDigiPixel> pixelArray)
{
fDigiArray = pixelArray;
        Double_t col = 0, row = 0, charge = 0;
        Double_t tempCol = 0, tempRow = 0;
        std::vector<Double_t> timeValues;
        std::vector<Double_t> timeValueErrors;

        Int_t count = 0, mcindex=-1;
        //Double_t local[2], master[2];
  //TODO: Get away from default 10 Frontends per column?

        if (fDigiArray.size() == 1){
                if (fChargeConverter->DigiValueToCharge(fDigiArray[0]) > 0){
                        col = fDigiArray[0].GetPixelColumn() + ((Int_t)(fDigiArray[0].GetFE()%10)) * fcols;
                        if (col < 0){
                                col -= 0.5;
                                col += frows / 2;
                        }
                        else col += 0.5;
                        row = fDigiArray[0].GetPixelRow()+ (fDigiArray[0].GetFE()/10) * frows;
                        if (row < 0){
                                row -= 0.5;
                                row += flx /2;
                        }
                        else row += 0.5;
                        if (fVerbose > 1)
                                std::cout << "GetCluster:col/row " << col << " " << row << std::endl;
                        count = 1;
                        charge = fChargeConverter->DigiValueToCharge(fDigiArray[0]);
                          for(Int_t mcI = 0; mcI<fDigiArray[0].GetNIndices();mcI++){
                                if (fDigiArray[0].GetIndex(mcI) > -1) {
                                  mcindex = fDigiArray[0].GetIndex(mcI);
                                  break;
                                }
                          }
                          timeValues.push_back(fDigiArray[0].GetTimeStamp());
                          timeValueErrors.push_back(fDigiArray[0].GetTimeStampError());
                }
        }
        else {
                //cout << "Multiple Hits!" << std::endl;
                for (UInt_t i = 0; i < fDigiArray.size(); i++){
                        //cout << "ActCol / Row" << col << " " << row << " added Col/Row " << fDigiArray[i].GetPixelColumn() << " " << fDigiArray[i].GetPixelRow() << endl;
                        if (fChargeConverter->DigiValueToCharge(fDigiArray[i]) > 0){
                                tempCol = fDigiArray[i].GetPixelColumn() + (Int_t)(fDigiArray[0].GetFE()%10) * fcols;
                                tempRow = fDigiArray[i].GetPixelRow() + fDigiArray[0].GetFE()/10 * frows;
                                col += (tempCol*fChargeConverter->DigiValueToCharge(fDigiArray[i]));
                                row += (tempRow*fChargeConverter->DigiValueToCharge(fDigiArray[i]));
                                charge += fChargeConverter->DigiValueToCharge(fDigiArray[i]);
                                timeValues.push_back(fDigiArray[i].GetTimeStamp());
                                timeValueErrors.push_back(fDigiArray[i].GetTimeStampError());
                                count++;
        if(mcindex < 0){
          for(Int_t mcI = 0; mcI<fDigiArray[i].GetNIndices();mcI++){ 
            if (fDigiArray[i].GetIndex(mcI) > -1) {
              mcindex = fDigiArray[i].GetIndex(mcI);
              break;
            }
          }
        }//mcindex
        
                        }
                }
                if (count > 0){
                        if (charge > 0){
                                col /= charge;
                                row /= charge;
                        }
                        col += 0.5;
                        row += 0.5;
                }
                else col = row = 0;
        }
        if (fVerbose > 1){
                std::cout << "Col: " << col << " Row: " << row << std::endl;
        }

  TVector3 offset = GetSensorDimensions(fDigiArray[0].GetSensorID());
  TVector3 locpos( col*flx - offset.X(), row*fly - offset.Y(), 0);
  TVector3 pos = fGeoH->LocalToMasterShortId(locpos,fDigiArray[0].GetSensorID());

  Double_t errZ = 2.*fGeoH->GetSensorDimensionsShortId(fDigiArray[0].GetSensorID()).Z();
  TMatrixD locCov(3,3);
  locCov[0][0]=flx*flx/12.;
  locCov[1][1]=fly*fly/12.;
  locCov[2][2]=errZ*errZ/12;
  TMatrixD hitCov=fGeoH->LocalToMasterErrorsShortId(locCov,fDigiArray[0].GetSensorID());
  TVector3 dpos(sqrt(hitCov[0][0]),sqrt(hitCov[1][1]),sqrt(hitCov[2][2]));
 //std::cout << "-I- PndSdsChargeWeightedPixelMapping Error DPos: " << dpos.x() << " " << dpos.y() << " " << dpos.z() << std::endl;

  Double_t meanTime = 0;
  //Double_t meanTimeError = 0;
  Double_t sumVar = 0;

  for (UInt_t t = 0; t < timeValues.size(); t++){
          meanTime += timeValues[t] / (timeValueErrors[t] * timeValueErrors[t]);
          sumVar += 1/(timeValueErrors[t] * timeValueErrors[t]);
  }

  if (sumVar > 0)
          meanTime /= sumVar;



  PndSdsHit thehit(fDigiArray[0].GetDetID(),fDigiArray[0].GetSensorID(), pos, dpos, -1, charge, fDigiArray.size(),mcindex);
  thehit.SetCov(hitCov);
  thehit.SetTimeStamp(meanTime);
  thehit.SetTimeStampError(1/sumVar);
  //std::cout << "-I- PndSdsChargeWeightedPixelMapping TimeStamp: " << tempTime/count << std::endl;
  return thehit;
}

TGeoHMatrix PndSdsChargeWeightedPixelMapping::GetTransformation(Int_t sensorID)
{
  gGeoManager->cd(fGeoH->GetPath(sensorID));
  TGeoHMatrix* transMat = gGeoManager->GetCurrentMatrix();
  if (fVerbose > 2)
        transMat->Print("");
  return *transMat;
}

TVector3 PndSdsChargeWeightedPixelMapping::GetSensorDimensions(Int_t sensorID)
{
        gGeoManager->cd(fGeoH->GetPath(sensorID));
        TGeoVolume* actVolume = gGeoManager->GetCurrentVolume();
        TGeoBBox* actBox = (TGeoBBox*)(actVolume->GetShape());
        TVector3 result;
        result.SetX(actBox->GetDX());
        result.SetY(actBox->GetDY());
        result.SetZ(actBox->GetDZ());

        //result.Dump();

        return result;
}