RPixPlaneCombinatoryTracking.h

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/*
 *
* This is a part of CTPPS offline software.
* Author:
*   Fabrizio Ferro (ferro@ge.infn.it)
*   Enrico Robutti (robutti@ge.infn.it)
*   Fabio Ravera   (fabio.ravera@cern.ch)
*
*/
#ifndef RecoCTPPS_PixelLocal_RPixPlaneCombinatoryTracking_H
#define RecoCTPPS_PixelLocal_RPixPlaneCombinatoryTracking_H

#include "FWCore/ParameterSet/interface/ParameterSet.h"
#include "DataFormats/Common/interface/DetSetVector.h"
#include "FWCore/ParameterSet/interface/ParameterSet.h"

#include "DataFormats/CTPPSReco/interface/CTPPSPixelLocalTrack.h"
#include "RecoCTPPS/PixelLocal/interface/RPixDetTrackFinder.h"
#include "DataFormats/GeometryVector/interface/GlobalPoint.h"

#include <vector>
#include <map>

class RPixPlaneCombinatoryTracking : public RPixDetTrackFinder{

  public:
    RPixPlaneCombinatoryTracking(edm::ParameterSet const& parameterSet);
    ~RPixPlaneCombinatoryTracking() override;
    void initialize() override;
    void findTracks(int run) override;

  private:
    typedef std::vector<std::vector<uint32_t> > PlaneCombinations;
    typedef std::vector<RPixDetPatternFinder::PointInPlane> PointInPlaneList;
    typedef std::map<CTPPSPixelDetId, size_t> HitReferences;
    typedef std::map< HitReferences, PointInPlaneList > PointAndReferenceMap;
    typedef std::pair<HitReferences, PointInPlaneList > PointAndReferencePair;

    int verbosity_;
    uint32_t trackMinNumberOfPoints_;
    double maximumChi2OverNDF_;
    double maximumXLocalDistanceFromTrack_;
    double maximumYLocalDistanceFromTrack_;
    PlaneCombinations possiblePlaneCombinations_;
    
    void getPlaneCombinations(const std::vector<uint32_t> &inputPlaneList, uint32_t numberToExtract, PlaneCombinations &planeCombinations) const;
    CTPPSPixelLocalTrack fitTrack(PointInPlaneList pointList);
    void getHitCombinations(
        const std::map<CTPPSPixelDetId, PointInPlaneList > &mapOfAllHits, 
        std::map<CTPPSPixelDetId, PointInPlaneList >::iterator mapIterator,
        HitReferences tmpHitPlaneMap,
        const PointInPlaneList &tmpHitVector,
        PointAndReferenceMap &outputMap);
    PointAndReferenceMap produceAllHitCombination(PlaneCombinations inputPlaneCombination);
    bool calculatePointOnDetector(CTPPSPixelLocalTrack *track, CTPPSPixelDetId planeId, GlobalPoint &planeLineIntercept);
    static bool functionForPlaneOrdering(
        PointAndReferencePair a,
        PointAndReferencePair b) { 
        return (a.second.size() > b.second.size()); }
    std::vector<PointAndReferencePair > orderCombinationsPerNumberOrPoints(
        PointAndReferenceMap inputMap);


    inline uint32_t factorial(uint32_t x) const {
      if(x==0) return 1;
      return (x == 1 ? x : x * factorial(x - 1));
    }

};

#endif