/data/refman/pasoursint/CMSSW_5_2_9/src/RecoTracker/TkHitPairs/src/CosmicHitPairGeneratorFromLayerPair.cc

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#include "RecoTracker/TkHitPairs/interface/CosmicHitPairGeneratorFromLayerPair.h"
#include "RecoTracker/TkTrackingRegions/interface/TrackingRegion.h"
#include "TrackingTools/DetLayers/interface/DetLayer.h"
#include "RecoTracker/TkHitPairs/interface/OrderedHitPair.h"
#include "RecoTracker/TkHitPairs/interface/OrderedHitPairs.h"
#include "Geometry/Records/interface/TrackerDigiGeometryRecord.h"
#include "FWCore/MessageLogger/interface/MessageLogger.h"
#include "TrackingTools/DetLayers/interface/BarrelDetLayer.h"
#include "FWCore/Framework/interface/ESHandle.h"
#include "RecoTracker/TransientTrackingRecHit/interface/TkTransientTrackingRecHitBuilder.h"
#include "TrackingTools/Records/interface/TransientRecHitRecord.h"

using namespace std;
typedef TransientTrackingRecHit::ConstRecHitPointer TkHitPairsCachedHit;

CosmicHitPairGeneratorFromLayerPair::CosmicHitPairGeneratorFromLayerPair(const LayerWithHits* inner, 
                                                             const LayerWithHits* outer, 
                                                                         //                                                          LayerCacheType* layerCache, 
                                                             const edm::EventSetup& iSetup)
  : TTRHbuilder(0),trackerGeometry(0),
    //theLayerCache(*layerCache), 
    theOuterLayer(outer), theInnerLayer(inner)
{

  edm::ESHandle<TrackerGeometry> tracker;
  iSetup.get<TrackerDigiGeometryRecord>().get(tracker);
  trackerGeometry = tracker.product();
}
void CosmicHitPairGeneratorFromLayerPair::hitPairs(
  const TrackingRegion & region, OrderedHitPairs & result,
  const edm::EventSetup& iSetup)
{
//  static int NSee = 0; static int Ntry = 0; static int Nacc = 0;


  typedef OrderedHitPair::InnerRecHit InnerHit;
  typedef OrderedHitPair::OuterRecHit OuterHit;


  if (theInnerLayer->recHits().empty()) return;

  if (theOuterLayer->recHits().empty()) return;
  //  const DetLayer* innerlay=theOuterLayer->layer();
  // const BarrelDetLayer *pippo=dynamic_cast<const BarrelDetLayer*>(theOuterLayer->layer());


  // ************ Daniele

  const DetLayer* blay1;
  const DetLayer* blay2;
  blay1 = dynamic_cast<const BarrelDetLayer*>(theInnerLayer->layer());
  blay2 = dynamic_cast<const BarrelDetLayer*>(theOuterLayer->layer());


  bool seedfromoverlaps= false;
  bool InTheBarrel = false;
  bool InTheForward = false;
  if (blay1 && blay2) {
    InTheBarrel = true;
  }
  else  InTheForward = true;

  if (InTheBarrel){
    float radius1 =dynamic_cast<const BarrelDetLayer*>(theInnerLayer->layer())->specificSurface().radius();
    float radius2 =dynamic_cast<const BarrelDetLayer*>(theOuterLayer->layer())->specificSurface().radius();
     seedfromoverlaps=(abs(radius1-radius2)<0.1) ? true : false;
  }

 
  vector<OrderedHitPair> allthepairs;
  std::string builderName = "WithTrackAngle";
  edm::ESHandle<TransientTrackingRecHitBuilder> builder;
  iSetup.get<TransientRecHitRecord>().get(builderName, builder);

  
  std::vector<const TrackingRecHit*>::const_iterator ohh;
  for(ohh=theOuterLayer->recHits().begin();ohh!=theOuterLayer->recHits().end();ohh++){
    TkHitPairsCachedHit oh= builder->build(*ohh);
    std::vector<const TrackingRecHit*>::const_iterator ihh;
    for(ihh=theInnerLayer->recHits().begin();ihh!=theInnerLayer->recHits().end();ihh++){
      TkHitPairsCachedHit ih= builder->build(*ihh);
      
      float z_diff =ih->globalPosition().z()-oh->globalPosition().z();
      float inny=ih->globalPosition().y();
      float outy=oh->globalPosition().y();
      float innx=ih->globalPosition().x();
      float outx=oh->globalPosition().x();;
      float dxdy=abs((outx-innx)/(outy-inny));
      float DeltaR=oh->globalPosition().perp()-ih->globalPosition().perp();;
      
      if( InTheBarrel && (abs(z_diff)<30) // && (outy > 0.) && (inny > 0.)
          //&&((abs(inny-outy))<30) 
          &&(dxdy<2)
          &&(inny*outy>0)
          && (abs(DeltaR)>0)) {

        //      cout << " ******** sono dentro inthebarrel *********** " << endl;
        if (seedfromoverlaps){
          //this part of code works for MTCC
          // for the other geometries must be verified
          //Overlaps in the difference in z is decreased and the difference in phi is
          //less than 0.05
          if ((DeltaR<0)&&(abs(z_diff)<18)&&(abs(ih->globalPosition().phi()-oh->globalPosition().phi())<0.05)&&(dxdy<2)) result.push_back( OrderedHitPair(ih, oh));
        }
        else  result.push_back( OrderedHitPair( ih, oh));
      
        


      }
      if( InTheForward &&  (abs(z_diff) > 1.)) {
        //      cout << " ******** sono dentro intheforward *********** " << endl;
        result.push_back( OrderedHitPair(ih,oh));
      }
    }
  }

//   stable_sort(allthepairs.begin(),allthepairs.end(),CompareHitPairsY(iSetup));
//   //Seed from overlaps are saved only if 
//   //no others have been saved

//   if (allthepairs.size()>0) {
//     if (seedfromoverlaps) {
//       if (result.size()==0) result.push_back(allthepairs[0]);
//     }
//     else result.push_back(allthepairs[0]);
//   }


}