CSCTFDTReceiver.cc

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#include <L1Trigger/CSCTrackFinder/src/CSCTFDTReceiver.h>
#include <L1Trigger/DTTrackFinder/src/L1MuDTTFConfig.h>
#include <L1TriggerConfig/DTTPGConfig/interface/DTConfigTraco.h>
#include <DataFormats/MuonDetId/interface/CSCDetId.h>
#include <DataFormats/MuonDetId/interface/CSCTriggerNumbering.h>
#include <DataFormats/L1CSCTrackFinder/interface/CSCBitWidths.h>
#include <L1Trigger/CSCCommonTrigger/interface/CSCConstants.h>
#include <DataFormats/MuonDetId/interface/DTChamberId.h>

#include <L1Trigger/CSCTrackFinder/src/CSCTFDTReceiverLUT.h>

CSCTriggerContainer<csctf::TrackStub> CSCTFDTReceiver::process(const L1MuDTChambPhContainer* dttrig)
{
  dtstubs.clear();
  if( !dttrig ) return dtstubs;

  //Need a better way to get these values since this
  // violates CMSSW coding policy
  const int dt_minBX = L1MuDTTFConfig::getBxMinGlobally();
  const int dt_maxBX = L1MuDTTFConfig::getBxMaxGlobally();

  const int dt_toffs = 0;// changed since DT tpg now centers around zero //abs(dt_maxBX - dt_minBX);

  // consider all BX
  for(int bx = dt_minBX + dt_toffs; bx <= dt_maxBX + dt_toffs; ++bx)
    for(int e = CSCDetId::minEndcapId(); e <= CSCDetId::maxEndcapId(); ++e)
      for(int s = CSCTriggerNumbering::minTriggerSectorId(); s <= CSCTriggerNumbering::maxTriggerSectorId(); ++s)
    {
      int wheel = (e == 1) ? 2 : -2;
      int sector = 2*s - 1;
      int csc_bx = bx + 6;//Delay DT stubs by 6 bx.

      // combine two 30 degree DT sectors into a 60 degree CSC
      // sector.
      for(int is = sector; is <= sector+1; ++is)
        {
          int iss = (is == 12) ? 0 : is;
          const L1MuDTChambPhDigi* dtts[2];

          for(int stub = 0; stub < 2; ++stub)
        {
          dtts[stub] = (stub == 0) ? dttrig->chPhiSegm1(wheel,1,iss,bx) :
                                     dttrig->chPhiSegm2(wheel,1,iss,bx);
          if(dtts[stub])
            {

              // --------------------------------------------------------------
              // IKF: this code has been reformulated ...
              // --------------------------------------------------------------
              // // Convert stubs to CSC format (signed -> unsigned)
              // // phi was 12 bits (signed) for pi radians = 57.3 deg
              // // relative to center of 30 degree DT sector
              // double tmp = static_cast<const double> (dtts[stub]->phi()) /
              //    DTConfigTraco::RESOLPSIR * 180./M_PI + 15.;
              // int phi = static_cast<int> (tmp/62. * (1<<(CSCBitWidths::kGlobalPhiDataBitWidth)));
              // --------------------------------------------------------------
              // IKF  ...and is now this line, actually works a tiny bit better.
              // --------------------------------------------------------------
              //              float tmp = dtts[stub] -> phi() * 1.0;
              //
              //              tmp *= 90.0;
              //              tmp /= 31.0;
              //              //              tmp /= M_PI;
              //              tmp /= 3.1416;
              //              tmp += 1057.0;
              //
              //              int phi = static_cast<int> (tmp);

              // --------------------------------------------------------------
              // IKF  ...and is now this line, actually works a tiny bit better.
              // --------------------------------------------------------------
              int phi = dtts[stub] -> phi();

              if (phi < 0) phi += 4096;

              if (phi > 4096)
            { std::cout << "AAAAAAAAAAGH TOO BIG PHI:" << phi << std::endl;
              continue; 
            }
              if (phi < 0){
            std::cout << "AAAAAAAAH NEG PHI" << phi << std::endl;
            continue;
              }

              phi = CSCTFDTReceiverLUT::lut[phi];

              // --------------------------------------------------------------

              // DT chambers may lie outside CSC sector boundary
              // Eventually we need to extend CSC phi definition
              // --------------------------------------------------------------
              // IKF: this is a protection, physically can't happen in data (bus too narrow) - 
              // - what really happens in data?
              // --------------------------------------------------------------

              phi = (phi>0) ? phi : 0;
              phi = (phi<(1<<(CSCBitWidths::kGlobalPhiDataBitWidth))) ? phi :
            (1<<(CSCBitWidths::kGlobalPhiDataBitWidth))-1;


              // change phib from 10 bits to 5
              int phib = ((dtts[stub]->phiB() & 0x3FF) >> 5) & 0x1F;// 0x3FF=1023, 0x1F=31
              int qual = dtts[stub]->code();
              // barrel allows quality=0!
              qual = (qual + 1)%8;

              CSCCorrelatedLCTDigi dtinfo(stub+1,1, qual, 0, stub, 0, phib, csc_bx+stub, 1+(is+1)%2);
              DTChamberId dtid(wheel,1,iss+1);
              csctf::TrackStub tsCSC(dtinfo,dtid, phi, 0);

              dtstubs.push_back(tsCSC);
            }
        }
        }
    }

  return dtstubs;
}