THcDC.cxx

	for(Int_t itr=0;itr < fNDCTracks;itr++) {
	  printf("%s %5d \n","Hit info for track number = ",itr+1);
          printf("%5s %-15s %-15s %-15s \n","Plane","WIRE_COORD","Fit postiion","Residual");
         THcDCTrack *theDCTrack = static_cast<THcDCTrack*>( fDCTracks->At(itr));
	 for(Int_t ihit=0;ihit < theDCTrack->GetNHits();ihit++) {
	  THcDCHit* hit=theDCTrack->GetHit(ihit);
	  Int_t plane=hit->GetPlaneNum()-1;
	  Double_t coords_temp;
      if(fFixLR) {
	if(fFixPropagationCorrection) {
	  coords_temp = hit->GetPos()
	    + theDCTrack->GetHitLR(ihit)*theDCTrack->GetHitDist(ihit);
	} else {
	  coords_temp = hit->GetPos()
	    + theDCTrack->GetHitLR(ihit)*hit->GetDist();
	}
      } else {
	if(fFixPropagationCorrection) {
	  coords_temp = hit->GetPos()
	    + hit->GetLR()*theDCTrack->GetHitDist(ihit);
	} else {
	  coords_temp = hit->GetCoord();
	}
      }
      printf("%-5d %15.7e %15.7e %15.7e \n",plane+1,coords_temp,theDCTrack->GetCoord(plane),theDCTrack->GetResidual(plane));
	 }
        }
      }

  //
}
Double_t THcDC::DpsiFun(Double_t ray[4], Int_t plane)
{
  /*
    this function calculates the psi coordinate of the intersection
    of a ray (defined by ray) with a hms wire chamber plane. the geometry
    of the plane is contained in the coeff array calculated in the
    array hplane_coeff
    Note it is call by MINUIT via H_FCNCHISQ and so uses double precision
    variables

    the ray is defined by
    x = (z-zt)*tan(xp) + xt
    y = (z-zt)*tan(yp) + yt
     at some fixed value of zt*
    ray(1) = xt
    ray(2) = yt
    ray(3) = tan(xp)
    ray(4) = tan(yp)
  */

  Double_t infinity = 1.0E+20;
  Double_t cinfinity = 1/infinity;
  Double_t DpsiFun = 
    ray[2]*ray[1]*fPlaneCoeffs[plane][0] +
    ray[3]*ray[0]*fPlaneCoeffs[plane][1] +
    ray[2]*fPlaneCoeffs[plane][2] +
    ray[3]*fPlaneCoeffs[plane][3] +
    ray[0]*fPlaneCoeffs[plane][4] +
    ray[1]*fPlaneCoeffs[plane][5];
  Double_t denom = ray[2]*fPlaneCoeffs[plane][6]
    + ray[3]*fPlaneCoeffs[plane][7]
    + fPlaneCoeffs[plane][8];
  if(TMath::Abs(denom) < cinfinity) {
    DpsiFun = infinity;
  } else { 
    DpsiFun = DpsiFun/denom;
  }
  return(DpsiFun);
}	    

//_____________________________________________________________________________
Int_t THcDC::End(THaRunBase* run)
{
  //  EffCalc();
  return 0;
}

//_____________________________________________________________________________
void THcDC::EffInit()
{
  // Create, and initialize counters used to calculate
  // efficiencies.  Register the counters in gHcParms so that the
  // variables can be used in end of run reports.

  delete [] fNChamHits;  fNChamHits = new Int_t [fNChambers];
  delete [] fPlaneEvents; fPlaneEvents = new Int_t [fNPlanes];
  
  fTotEvents = 0;
  for(Int_t i=0;i<fNChambers;i++) {
    fNChamHits[i] = 0;
  }
  for(Int_t i=0;i<fNPlanes;i++) {
    fPlaneEvents[i] = 0;
  }
  gHcParms->Define(Form("%sdc_tot_events",fPrefix),"Total DC Events",fTotEvents);
  gHcParms->Define(Form("%sdc_cham_hits[%d]",fPrefix,fNChambers),"N events with hits per chamber",*fNChamHits);
  gHcParms->Define(Form("%sdc_events[%d]",fPrefix,fNPlanes),"N events with hits per plane",*fPlaneEvents);
}

//_____________________________________________________________________________
void THcDC::Eff()
{
  // Accumulate statistics for efficiency calculations

  fTotEvents++;
  for(Int_t i=0;i<fNChambers;i++) {
    if(fChambers[i]->GetNHits()>0) fNChamHits[i]++;
  }
  for(Int_t i=0;i<fNPlanes;i++) {
    if(fPlanes[i]->GetNHits() > 0) fPlaneEvents[i]++;
  }
  return;
}

ClassImp(THcDC)
////////////////////////////////////////////////////////////////////////////////