ValidateGeometry.cc

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// -*- C++ -*-
//
//

#include "FWCore/Framework/interface/Frameworkfwd.h"
#include "FWCore/Framework/interface/EDAnalyzer.h"
#include "FWCore/Framework/interface/Event.h"
#include "FWCore/Framework/interface/MakerMacros.h"
#include "FWCore/Framework/interface/Event.h"
#include "FWCore/Framework/interface/EventSetup.h"
#include "FWCore/Framework/interface/ESHandle.h"

#include "FWCore/ParameterSet/interface/ParameterSet.h"

#include "Geometry/DTGeometry/interface/DTGeometry.h"
#include "Geometry/RPCGeometry/interface/RPCGeometry.h"
#include "Geometry/CSCGeometry/interface/CSCGeometry.h"
#include "Geometry/DTGeometry/interface/DTLayer.h"

#include "Geometry/CaloGeometry/interface/CaloGeometry.h"
#include "Geometry/CaloGeometry/interface/CaloSubdetectorGeometry.h"

#include "Geometry/Records/interface/MuonGeometryRecord.h"
#include "Geometry/Records/interface/CaloGeometryRecord.h"
#include "Geometry/Records/interface/TrackerDigiGeometryRecord.h"

#include "Geometry/TrackerGeometryBuilder/interface/TrackerGeometry.h"
#include "Geometry/TrackerGeometryBuilder/interface/PixelGeomDetUnit.h"
#include "Geometry/TrackerGeometryBuilder/interface/StripGeomDetUnit.h"
#include "Geometry/TrackerGeometryBuilder/interface/RectangularPixelTopology.h"
#include "Geometry/TrackerGeometryBuilder/interface/StripGeomDetType.h"

#include "Geometry/CommonTopologies/interface/PixelTopology.h"

#include "Geometry/CommonTopologies/interface/StripTopology.h"
#include "Geometry/CommonTopologies/interface/RectangularStripTopology.h"
#include "Geometry/CommonTopologies/interface/TrapezoidalStripTopology.h"

#include "Fireworks/Core/interface/FWGeometry.h"
#include "Fireworks/Core/interface/fwLog.h"
#include "Fireworks/Tracks/interface/TrackUtils.h"

#include "DataFormats/HcalDetId/interface/HcalSubdetector.h"
#include "DataFormats/EcalDetId/interface/EcalSubdetector.h"
#include "DataFormats/MuonDetId/interface/DTWireId.h"
#include "DataFormats/HcalDetId/interface/HcalCastorDetId.h"
#include "DataFormats/HcalDetId/interface/HcalZDCDetId.h"

#include "DataFormats/GeometrySurface/interface/RectangularPlaneBounds.h"
#include "DataFormats/GeometrySurface/interface/TrapezoidalPlaneBounds.h"

#include <string>
#include <iostream>

#include <TEveGeoNode.h>
#include <TGeoVolume.h>
#include <TGeoBBox.h>
#include <TGeoArb8.h>
#include <TFile.h>
#include <TH1.h>

class ValidateGeometry : public edm::EDAnalyzer 
{
public:
  explicit ValidateGeometry(const edm::ParameterSet&);
  ~ValidateGeometry() override;

private:
  void beginJob() override;
  void analyze(const edm::Event&, const edm::EventSetup&) override;
  void endJob() override;  

  void validateRPCGeometry(const int regionNumber, 
                           const char* regionName);

  void validateDTChamberGeometry();
  void validateDTLayerGeometry();

  void validateCSChamberGeometry(const int endcap,
                                 const char* detname);

  void validateCSCLayerGeometry(const int endcap,
                                const char* detname);

  void validateCaloGeometry(DetId::Detector detector, int subdetector,
                            const char* detname);

  void validateTrackerGeometry(const TrackerGeometry::DetContainer& dets, 
                               const char* detname);

  void validatePixelTopology(const TrackerGeometry::DetContainer& dets,
                             const char* detname);
                   
  void validateStripTopology(const TrackerGeometry::DetContainer& dets,
                             const char* detname);
        
  void compareTransform(const GlobalPoint& point, const TGeoMatrix* matrix);

  void compareShape(const GeomDet* det, const float* shape);
  
  double getDistance(const GlobalPoint& point1, const GlobalPoint& point2);

  void makeHistograms(const char* detector);
  void makeHistogram(const std::string& name, std::vector<double>& data);
  
  std::string infileName_;
  std::string outfileName_;

  edm::ESHandle<RPCGeometry>     rpcGeometry_;
  edm::ESHandle<DTGeometry>      dtGeometry_;
  edm::ESHandle<CSCGeometry>     cscGeometry_;
  edm::ESHandle<CaloGeometry>    caloGeometry_;
  edm::ESHandle<TrackerGeometry> trackerGeometry_;

  FWGeometry fwGeometry_;

  TFile* outFile_;

  std::vector<double> globalDistances_;
  std::vector<double> topWidths_;
  std::vector<double> bottomWidths_;
  std::vector<double> lengths_;
  std::vector<double> thicknesses_;

  void clearData()
    {
      globalDistances_.clear();
      topWidths_.clear();
      bottomWidths_.clear();
      lengths_.clear();
      thicknesses_.clear();
    }

  bool dataEmpty()
    {
      return (globalDistances_.empty() && 
              topWidths_.empty() && 
              bottomWidths_.empty() && 
              lengths_.empty() && 
              thicknesses_.empty());
    }

  bool doTracker_;
  bool doMuon_;
  bool doCalo_;
};


ValidateGeometry::ValidateGeometry(const edm::ParameterSet& iConfig)
  : infileName_(iConfig.getUntrackedParameter<std::string>("infileName")),
    outfileName_(iConfig.getUntrackedParameter<std::string>("outfileName"))
{
  doTracker_ = iConfig.getUntrackedParameter<bool>( "Tracker", true );
  doMuon_ = iConfig.getUntrackedParameter<bool>( "Muon", true );
  doCalo_ = iConfig.getUntrackedParameter<bool>( "Calo", true );

  fwGeometry_.loadMap(infileName_.c_str());

  outFile_ = new TFile(outfileName_.c_str(), "RECREATE");
}


ValidateGeometry::~ValidateGeometry()
{}


void 
ValidateGeometry::analyze(const edm::Event& event, const edm::EventSetup& eventSetup)
{
  if( doMuon_ )
  {
    eventSetup.get<MuonGeometryRecord>().get(rpcGeometry_);

    if ( rpcGeometry_.isValid() )
    {
      std::cout<<"Validating RPC -z endcap geometry"<<std::endl;
      validateRPCGeometry(-1, "RPC -z endcap");

      std::cout<<"Validating RPC +z endcap geometry"<<std::endl;
      validateRPCGeometry(+1, "RPC +z endcap");

      std::cout<<"Validating RPC barrel geometry"<<std::endl;
      validateRPCGeometry(0, "RPC barrel");
    }
    else
      fwLog(fwlog::kWarning)<<"Invalid RPC geometry"<<std::endl; 


    eventSetup.get<MuonGeometryRecord>().get(dtGeometry_);

    if ( dtGeometry_.isValid() )
    {
      std::cout<<"Validating DT chamber geometry"<<std::endl;
      validateDTChamberGeometry();

      std::cout<<"Validating DT layer geometry"<<std::endl;
      validateDTLayerGeometry();
    }
    else
      fwLog(fwlog::kWarning)<<"Invalid DT geometry"<<std::endl; 


    eventSetup.get<MuonGeometryRecord>().get(cscGeometry_);

    if ( cscGeometry_.isValid() )
    {
      std::cout<<"Validating CSC -z geometry"<<std::endl;
      validateCSChamberGeometry(-1, "CSC chamber -z endcap");

      std::cout<<"Validating CSC +z geometry"<<std::endl;
      validateCSChamberGeometry(+1, "CSC chamber +z endcap");

      std::cout<<"Validating CSC layer -z geometry"<<std::endl;
      validateCSCLayerGeometry(-1, "CSC layer -z endcap");

      std::cout<<"Validating CSC layer +z geometry"<<std::endl;
      validateCSCLayerGeometry(+1, "CSC layer +z endcap");
    }
    else
      fwLog(fwlog::kWarning)<<"Invalid CSC geometry"<<std::endl;
  }

  if( doTracker_ )
  {
    eventSetup.get<TrackerDigiGeometryRecord>().get(trackerGeometry_);

    if ( trackerGeometry_.isValid() )
    {
      std::cout<<"Validating TIB geometry and topology"<<std::endl;
      validateTrackerGeometry(trackerGeometry_->detsTIB(), "TIB");
      validateStripTopology(trackerGeometry_->detsTIB(), "TIB");

      std::cout<<"Validating TOB geometry and topology"<<std::endl;
      validateTrackerGeometry(trackerGeometry_->detsTOB(), "TOB");
      validateStripTopology(trackerGeometry_->detsTOB(), "TOB");

      std::cout<<"Validating TEC geometry and topology"<<std::endl;
      validateTrackerGeometry(trackerGeometry_->detsTEC(), "TEC");
      validateStripTopology(trackerGeometry_->detsTEC(), "TEC");

      std::cout<<"Validating TID geometry and topology"<<std::endl;
      validateTrackerGeometry(trackerGeometry_->detsTID(), "TID");
      validateStripTopology(trackerGeometry_->detsTID(), "TID");

      std::cout<<"Validating PXB geometry and topology"<<std::endl;
      validateTrackerGeometry(trackerGeometry_->detsPXB(), "PXB");
      validatePixelTopology(trackerGeometry_->detsPXB(), "PXB");

      std::cout<<"Validating PXF geometry and topology"<<std::endl;
      validateTrackerGeometry(trackerGeometry_->detsPXF(), "PXF");
      validatePixelTopology(trackerGeometry_->detsPXF(), "PXF");
    }
    else
      fwLog(fwlog::kWarning)<<"Invalid Tracker geometry"<<std::endl;
  }

  if( doCalo_ )
  {
    eventSetup.get<CaloGeometryRecord>().get(caloGeometry_);


    if ( caloGeometry_.isValid() )
    {
      std::cout<<"Validating EB geometry"<<std::endl;
      validateCaloGeometry(DetId::Ecal, EcalBarrel, "EB");

      std::cout<<"Validating EE geometry"<<std::endl;
      validateCaloGeometry(DetId::Ecal, EcalEndcap, "EE");

      std::cout<<"Validating ES geometry"<<std::endl;
      validateCaloGeometry(DetId::Ecal, EcalPreshower, "ES");

      std::cout<<"Validating HB geometry"<<std::endl;
      validateCaloGeometry(DetId::Hcal, HcalBarrel, "HB");
  
      std::cout<<"Validating HE geometry"<<std::endl;
      validateCaloGeometry(DetId::Hcal, HcalEndcap, "HE");

      std::cout<<"Validating HO geometry"<<std::endl;
      validateCaloGeometry(DetId::Hcal, HcalOuter, "HO");
    
      std::cout<<"Validating HF geometry"<<std::endl;
      validateCaloGeometry(DetId::Hcal, HcalForward, "HF");

      std::cout<<"Validating Castor geometry"<<std::endl;
      validateCaloGeometry(DetId::Calo, HcalCastorDetId::SubdetectorId, "Castor");

      std::cout<<"Validating ZDC geometry"<<std::endl;
      validateCaloGeometry(DetId::Calo, HcalZDCDetId::SubdetectorId, "ZDC");
    }
    else
      fwLog(fwlog::kWarning)<<"Invalid Calo geometry"<<std::endl; 
  }
}


void
ValidateGeometry::validateRPCGeometry(const int regionNumber, const char* regionName)
{
  clearData();
 
  std::vector<double> centers;
 
  auto const& rolls = rpcGeometry_->rolls();
  
  for ( auto it = rolls.begin(), 
      itEnd = rolls.end();
        it != itEnd; ++it )
  {
    const RPCRoll* roll = *it;

    if ( roll )
    {
      RPCDetId rpcDetId = roll->id();

      if ( rpcDetId.region() == regionNumber )
      {  
        const GeomDetUnit* det = rpcGeometry_->idToDetUnit(rpcDetId);
        GlobalPoint gp = det->surface().toGlobal(LocalPoint(0.0, 0.0, 0.0)); 
      
        const TGeoMatrix* matrix = fwGeometry_.getMatrix(rpcDetId.rawId());

        if ( ! matrix )
        {
          std::cout<<"Failed to get matrix of RPC with detid: "
                   << rpcDetId.rawId() <<std::endl;
          continue;
        }

        compareTransform(gp, matrix);

        const float* shape = fwGeometry_.getShapePars(rpcDetId.rawId());

        if ( ! shape )
        {
          std::cout<<"Failed to get shape of RPC with detid: "
                   << rpcDetId.rawId() <<std::endl;
          continue;
        }
      
        compareShape(det, shape);

        const float* parameters = fwGeometry_.getParameters(rpcDetId.rawId());

        if ( parameters == nullptr )
        {
          std::cout<<"Parameters empty for RPC with detid: "
                   << rpcDetId.rawId() <<std::endl;
          continue;
        }
              
        // Yes, I know that below I'm comparing the equivalence
        // of floating point numbers
       
        int nStrips = roll->nstrips();
        assert(nStrips == parameters[0]); 
        
        float stripLength = roll->specificTopology().stripLength();
        assert(stripLength == parameters[1]);

        float pitch = roll->specificTopology().pitch();
        assert(pitch == parameters[2]);

        float offset = -0.5*nStrips*pitch;

        for ( int strip = 1; strip <= roll->nstrips(); ++strip )
        {
          LocalPoint centreOfStrip1 = roll->centreOfStrip(strip);        
          LocalPoint centreOfStrip2 = LocalPoint((strip-0.5)*pitch + offset, 0.0);

          centers.push_back(centreOfStrip1.x()-centreOfStrip2.x());
        }      
      }
    }
  }

  std::string hn(regionName);
  makeHistogram(hn+": centreOfStrip", centers);
 

  makeHistograms(regionName);
}


void 
ValidateGeometry::validateDTChamberGeometry()
{
  clearData();

  auto const& chambers = dtGeometry_->chambers();
  
  for ( auto it = chambers.begin(), 
      itEnd = chambers.end(); 
        it != itEnd; ++it)
  {
    const DTChamber* chamber = *it;
      
    if ( chamber )
    {
      DTChamberId chId = chamber->id();
      GlobalPoint gp = chamber->surface().toGlobal(LocalPoint(0.0, 0.0, 0.0)); 
     
      const TGeoMatrix* matrix = fwGeometry_.getMatrix(chId.rawId());
 
      if ( ! matrix )   
      {     
        std::cout<<"Failed to get matrix of DT chamber with detid: " 
                 << chId.rawId() <<std::endl;
        continue;
      }

      compareTransform(gp, matrix);

      const float* shape = fwGeometry_.getShapePars(chId.rawId());

      if ( ! shape )
      {
        std::cout<<"Failed to get shape of DT chamber with detid: "
                 << chId.rawId() <<std::endl;
        continue;
      }
      
      compareShape(chamber, shape);
    }
  }

  makeHistograms("DT chamber");
}


void 
ValidateGeometry::validateDTLayerGeometry()
{
  clearData();
  
  std::vector<double> wire_positions;

  auto const& layers = dtGeometry_->layers();
  
  for ( auto it = layers.begin(), 
      itEnd = layers.end(); 
        it != itEnd; ++it)
  {
    const DTLayer* layer = *it;
      
    if ( layer )
    {
      DTLayerId layerId = layer->id();
      GlobalPoint gp = layer->surface().toGlobal(LocalPoint(0.0, 0.0, 0.0)); 
     
      const TGeoMatrix* matrix = fwGeometry_.getMatrix(layerId.rawId());
 
      if ( ! matrix )   
      {     
        std::cout<<"Failed to get matrix of DT layer with detid: " 
                 << layerId.rawId() <<std::endl;
        continue;
      }

      compareTransform(gp, matrix);

      const float* shape = fwGeometry_.getShapePars(layerId.rawId());

      if ( ! shape )
      {
        std::cout<<"Failed to get shape of DT layer with detid: "
                 << layerId.rawId() <<std::endl;
        continue;
      }
      
      compareShape(layer, shape);

        
      const float* parameters = fwGeometry_.getParameters(layerId.rawId());
      
      if ( parameters == nullptr )
      {
        std::cout<<"Parameters empty for DT layer with detid: " 
                 << layerId.rawId() <<std::endl;
        continue;
      }
           
      float width = layer->surface().bounds().width();
      assert(width == parameters[6]); 

      float thickness = layer->surface().bounds().thickness();
      assert(thickness == parameters[7]);

      float length = layer->surface().bounds().length();
      assert(length == parameters[8]);

      int firstChannel = layer->specificTopology().firstChannel();
      assert(firstChannel == parameters[3]);

      int lastChannel  = layer->specificTopology().lastChannel();
      int nChannels = parameters[5];
      assert(nChannels == (lastChannel-firstChannel)+1);

      for ( int wireN = firstChannel; wireN - lastChannel <= 0; ++wireN )
      {
        double localX1 = layer->specificTopology().wirePosition(wireN);
        double localX2 = (wireN -(firstChannel-1)-0.5)*parameters[0] - nChannels/2.0*parameters[0];

        wire_positions.push_back(localX1-localX2);

        //std::cout<<"wireN, localXpos: "<< wireN <<" "<< localX1 <<" "<< localX2 <<std::endl;

      }
    }
  }

  makeHistogram("DT layer wire localX", wire_positions);

  makeHistograms("DT layer");
}


void 
ValidateGeometry::validateCSChamberGeometry(const int endcap, const char* detname)
{
  clearData();

  auto const& chambers = cscGeometry_->chambers();
     
  for ( auto it = chambers.begin(), 
      itEnd = chambers.end(); 
        it != itEnd; ++it )
  {
    const CSCChamber* chamber = *it;
         
    if ( chamber && chamber->id().endcap() == endcap )
    {
      DetId detId = chamber->geographicalId();
      GlobalPoint gp = chamber->surface().toGlobal(LocalPoint(0.0,0.0,0.0));

      const TGeoMatrix* matrix = fwGeometry_.getMatrix(detId.rawId());
  
      if ( ! matrix ) 
      {     
        std::cout<<"Failed to get matrix of CSC chamber with detid: " 
                 << detId.rawId() <<std::endl;
        continue;
      }

      compareTransform(gp, matrix);

      const float* shape = fwGeometry_.getShapePars(detId.rawId());

      if ( ! shape )
      {
        std::cout<<"Failed to get shape of CSC chamber with detid: "
                 << detId.rawId() <<std::endl;
        continue;
      }
      
      compareShape(chamber, shape);
    }
  }

  makeHistograms(detname);
}

void 
ValidateGeometry::validateCSCLayerGeometry(const int endcap, const char* detname)
{
  clearData();
  std::vector<double> strip_positions;
  std::vector<double> wire_positions;

  std::vector<double> me11_wiresLocal;
  std::vector<double> me12_wiresLocal;
  std::vector<double> me13_wiresLocal;
  std::vector<double> me14_wiresLocal;
  std::vector<double> me21_wiresLocal;
  std::vector<double> me22_wiresLocal;
  std::vector<double> me31_wiresLocal;
  std::vector<double> me32_wiresLocal;
  std::vector<double> me41_wiresLocal;
  std::vector<double> me42_wiresLocal;
  
  auto const& layers = cscGeometry_->layers();
     
  for ( auto it = layers.begin(), 
      itEnd = layers.end(); 
        it != itEnd; ++it )
  {
    const CSCLayer* layer = *it;
         
    if ( layer && layer->id().endcap() == endcap )
    {
      DetId detId = layer->geographicalId();
      GlobalPoint gp = layer->surface().toGlobal(LocalPoint(0.0,0.0,0.0));
      
      const TGeoMatrix* matrix = fwGeometry_.getMatrix(detId.rawId());
  
      if ( ! matrix ) 
      {     
        std::cout<<"Failed to get matrix of CSC layer with detid: " 
                 << detId.rawId() <<std::endl;
        continue;
      }

      compareTransform(gp, matrix);
      
      const float* shape = fwGeometry_.getShapePars(detId.rawId());

      if ( ! shape )
      {
        std::cout<<"Failed to get shape of CSC layer with detid: "
                 << detId.rawId() <<std::endl;
        continue;
      }
      
      compareShape(layer, shape);

      double length;
 
      if ( shape[0] == 1 )
      {
        length = shape[4];
      }
       
      else
      {      
        std::cout<<"Failed to get trapezoid from shape for CSC layer with detid: "
                 << detId.rawId() <<std::endl;
        continue;
      }

      const float* parameters = fwGeometry_.getParameters(detId.rawId());

      if ( parameters == nullptr )
      {
        std::cout<<"Parameters empty for CSC layer with detid: "
                 << detId.rawId() <<std::endl;
        continue;
      }

      int yAxisOrientation = layer->geometry()->topology()->yAxisOrientation();
      assert(yAxisOrientation == parameters[0]);
     
      float centreToIntersection = layer->geometry()->topology()->centreToIntersection();
      assert(centreToIntersection == parameters[1]);

      float yCentre = layer->geometry()->topology()->yCentreOfStripPlane();
      assert(yCentre == parameters[2]);

      float phiOfOneEdge = layer->geometry()->topology()->phiOfOneEdge();
      assert(phiOfOneEdge == parameters[3]);

      float stripOffset = layer->geometry()->topology()->stripOffset();
      assert(stripOffset == parameters[4]);

      float angularWidth = layer->geometry()->topology()->angularWidth();
      assert(angularWidth == parameters[5]);

      for ( int nStrip = 1; nStrip <= layer->geometry()->numberOfStrips(); 
            ++nStrip )
      {
        float xOfStrip1 = layer->geometry()->xOfStrip(nStrip);
      
        double stripAngle = phiOfOneEdge + yAxisOrientation*(nStrip-(0.5-stripOffset))*angularWidth;
        double xOfStrip2 = yAxisOrientation*(centreToIntersection-yCentre)*tan(stripAngle);

        strip_positions.push_back(xOfStrip1-xOfStrip2);
      }

      int station = layer->id().station();
      int ring    = layer->id().ring();

      double wireSpacingInGroup = layer->geometry()->wireTopology()->wireSpacing();
      assert(wireSpacingInGroup == parameters[6]);

      double wireSpacing = 0.0;
      // we calculate an average wire group 
      // spacing from radialExtentOfTheWirePlane / numOfWireGroups
      
      double extentOfWirePlane = 0.0;

      if ( ring == 2 )
      {
        if ( station == 1 )
          extentOfWirePlane = 174.81; //wireSpacing = 174.81/64;
        else
          extentOfWirePlane = 323.38; //wireSpacing = 323.38/64;
      }
      else if ( station == 1 && (ring == 1 || ring == 4))
        extentOfWirePlane = 150.5; //wireSpacing = 150.5/48;
      else if ( station == 1 && ring == 3 )
        extentOfWirePlane = 164.47; //wireSpacing = 164.47/32;
      else if ( station == 2 && ring == 1 )
        extentOfWirePlane = 189.97; //wireSpacing = 189.97/112;
      else if ( station == 3 && ring == 1 )
        extentOfWirePlane = 170.01; //wireSpacing = 170.01/96;
      else if ( station == 4 && ring == 1 )
        extentOfWirePlane = 149.73; //wireSpacing = 149.73/96;

      float wireAngle = layer->geometry()->wireTopology()->wireAngle();
      assert(wireAngle == parameters[7]);

      //float cosWireAngle = cos(wireAngle);

      /* NOTE
         Some parameters don't seem available in a public interface
         so have to perhaps hard-code. This may not be too bad as there
         seems to be a lot of degeneracy. 
      */

      double alignmentPinToFirstWire;
      double yAlignmentFrame = 3.49;
   
      if ( station == 1 ) 
      { 
        if ( ring == 1 || ring == 4 )
        {
          alignmentPinToFirstWire = 1.065;
          yAlignmentFrame = 0.0;
        }
        
        else // ME12, ME 13 
          alignmentPinToFirstWire = 2.85;
      }

      else if ( station == 4 && ring == 1 )
        alignmentPinToFirstWire = 3.04;
      
      else if ( station == 3 && ring == 1 )
        alignmentPinToFirstWire =  2.84;
      
      else  // ME21, ME22, ME32, ME42 
        alignmentPinToFirstWire = 2.87;
       
      double yOfFirstWire = (yAlignmentFrame-length) + alignmentPinToFirstWire;

      int nWireGroups = layer->geometry()->numberOfWireGroups();
      double E = extentOfWirePlane/nWireGroups;

      for ( int nWireGroup = 1; nWireGroup <= nWireGroups; ++nWireGroup )
      {         
        LocalPoint centerOfWireGroup = layer->geometry()->localCenterOfWireGroup(nWireGroup); 
        double yOfWire1 = centerOfWireGroup.y(); 

        //double yOfWire2 = (-0.5 - (nWireGroups*0.5 - 1) + (nWireGroup-1))*E; 
        //yOfWire2 += 0.5*E;
        double yOfWire2 = yOfFirstWire + ((nWireGroup-1)*E);
        yOfWire2 += wireSpacing*0.5;

        double ydiff_local = yOfWire1 - yOfWire2; 
        wire_positions.push_back(ydiff_local);

        //GlobalPoint globalPoint = layer->surface().toGlobal(LocalPoint(0.0,yOfWire1,0.0));

        /*
        float fwLocalPoint[3] = 
        {
          0.0, yOfWire2, 0.0
        };
        
        float fwGlobalPoint[3]; 
        fwGeometry_.localToGlobal(detId.rawId(), fwLocalPoint, fwGlobalPoint);
        double ydiff_global = globalPoint.y() - fwGlobalPoint[1]; 
        */

        if ( station == 1 )
        {
          if ( ring == 1 )
          {
            me11_wiresLocal.push_back(ydiff_local);
          }
          else if ( ring == 2 )
          {
            me12_wiresLocal.push_back(ydiff_local);
          }
          else if ( ring == 3 )
          {
            me13_wiresLocal.push_back(ydiff_local);
          }
          else if ( ring == 4 )
          {
            me14_wiresLocal.push_back(ydiff_local);
          }
        }
        else if ( station == 2 ) 
        {
          if ( ring == 1 )
          {
            me21_wiresLocal.push_back(ydiff_local);
          }
          else if ( ring == 2 )
          {
            me22_wiresLocal.push_back(ydiff_local);
          }
        }
        else if ( station == 3 )
        {
          if ( ring == 1 )
          {
            me31_wiresLocal.push_back(ydiff_local);
          }
          else if ( ring == 2 )
          {
            me32_wiresLocal.push_back(ydiff_local);
          }
        }
        else if ( station == 4 )
        {
          if ( ring == 1 )
          {
            me41_wiresLocal.push_back(ydiff_local);
          }
          else if ( ring == 2 )
          {
            me42_wiresLocal.push_back(ydiff_local);
          }
        }
      } 
    }
  }
  
  std::string hn(detname);
  makeHistogram(hn+": xOfStrip", strip_positions);

  makeHistogram(hn+": local yOfWire", wire_positions);
  
  makeHistogram("ME11: local yOfWire", me11_wiresLocal);
  makeHistogram("ME12: local yOfWire", me12_wiresLocal);
  makeHistogram("ME13: local yOfWire", me13_wiresLocal);
  makeHistogram("ME14: local yOfWire", me14_wiresLocal);
  makeHistogram("ME21: local yOfWire", me21_wiresLocal);
  makeHistogram("ME22: local yOfWire", me22_wiresLocal);
  makeHistogram("ME31: local yOfWire", me31_wiresLocal);
  makeHistogram("ME32: local yOfWire", me32_wiresLocal);
  makeHistogram("ME41: local yOfWire", me41_wiresLocal);
  makeHistogram("ME42: local yOfWire", me42_wiresLocal);

  makeHistograms(detname);
}

void 
ValidateGeometry::validateCaloGeometry(DetId::Detector detector, 
                                       int subdetector,
                                       const char* detname)
{
  clearData();

  const CaloSubdetectorGeometry* geometry = 
    caloGeometry_->getSubdetectorGeometry(detector, subdetector);

  const std::vector<DetId>& ids = geometry->getValidDetIds(detector, subdetector);

  for (auto it = ids.begin(), 
     iEnd = ids.end(); 
       it != iEnd; ++it) 
  {
    unsigned int rawId = (*it).rawId();

    const float* points = fwGeometry_.getCorners(rawId);

    if ( points == nullptr )
    { 
      std::cout <<"Failed to get points of "<< detname 
                <<" element with detid: "<< rawId <<std::endl;
      continue;
    }

    const CaloCellGeometry* cellGeometry = geometry->getGeometry(*it);
    const CaloCellGeometry::CornersVec& corners = cellGeometry->getCorners();
    
    assert(corners.size() == 8);
    
    for ( unsigned int i = 0, offset = 0; i < 8; ++i )
    {
      offset = 2*i;

      double distance = getDistance(GlobalPoint(points[i+offset], points[i+1+offset], points[i+2+offset]), 
                                    GlobalPoint(corners[i].x(), corners[i].y(), corners[i].z()));
     
      globalDistances_.push_back(distance);
    }
  }

  makeHistograms(detname);
}


void
ValidateGeometry::validateTrackerGeometry(const TrackerGeometry::DetContainer& dets,
                                          const char* detname)
{
  clearData();

  for ( TrackerGeometry::DetContainer::const_iterator it = dets.begin(), 
                                                   itEnd = dets.end(); 
        it != itEnd; ++it )
  {
    GlobalPoint gp = (trackerGeometry_->idToDet((*it)->geographicalId()))->surface().toGlobal(LocalPoint(0.0,0.0,0.0));
    unsigned int rawId = (*it)->geographicalId().rawId();

    const TGeoMatrix* matrix = fwGeometry_.getMatrix(rawId);

    if ( ! matrix )
    {
      std::cout <<"Failed to get matrix of "<< detname 
                <<" element with detid: "<< rawId <<std::endl;
      continue;
    }

    compareTransform(gp, matrix);

    const float* shape = fwGeometry_.getShapePars(rawId);

    if ( ! shape )
    {
      std::cout<<"Failed to get shape of "<< detname 
               <<" element with detid: "<< rawId <<std::endl;
      continue;
    }

    compareShape(*it, shape);
  }
  
  makeHistograms(detname);
}


void 
ValidateGeometry::validatePixelTopology(const TrackerGeometry::DetContainer& dets,
                                        const char* detname)
{
  std::vector<double> pixelLocalXs;
  std::vector<double> pixelLocalYs;

  for ( TrackerGeometry::DetContainer::const_iterator it = dets.begin(),
                                                   itEnd = dets.end();
        it != itEnd; ++it )
  {
    unsigned int rawId = (*it)->geographicalId().rawId();

    const float* parameters = fwGeometry_.getParameters(rawId);

    if ( parameters == nullptr )
    {
      std::cout<<"Parameters empty for "<< detname <<" element with detid: "
               << rawId <<std::endl;
      continue;
    }

    if ( const PixelGeomDetUnit* det = 
         dynamic_cast<const PixelGeomDetUnit*>(trackerGeometry_->idToDetUnit((*it)->geographicalId())) )
    {           
      if ( const PixelTopology* rpt = &det->specificTopology() )
      { 
        int nrows = rpt->nrows();
        int ncolumns = rpt->ncolumns();
                
        for ( int row = 1; row <= nrows; ++row )
        {
          for ( int column = 1; column <= ncolumns; ++column )
          {
            LocalPoint localPoint = rpt->localPosition(MeasurementPoint(row, column));

            pixelLocalXs.push_back(localPoint.x() - fireworks::pixelLocalX(row, parameters));
            pixelLocalYs.push_back(localPoint.y() - fireworks::pixelLocalY(column, parameters));
           }
        }
      }
       
      else
        std::cout<<"No topology for "<< detname <<" "<< rawId <<std::endl; 
    }

    else
      std::cout<<"No geomDetUnit for "<< detname <<" "<< rawId <<std::endl;
  }

  std::string hn(detname);
  makeHistogram(hn+" pixelLocalX", pixelLocalXs);
  makeHistogram(hn+" pixelLocalY", pixelLocalYs);
}

void 
ValidateGeometry::validateStripTopology(const TrackerGeometry::DetContainer& dets,
                                        const char* detname)
{
  std::vector<double> radialStripLocalXs;
  std::vector<double> rectangularStripLocalXs;

  for ( TrackerGeometry::DetContainer::const_iterator it = dets.begin(),
                                                   itEnd = dets.end();
        it != itEnd; ++it )
  {
    unsigned int rawId = (*it)->geographicalId().rawId();
    
    const float* parameters = fwGeometry_.getParameters(rawId);

    if ( parameters == nullptr )
    {    
      std::cout<<"Parameters empty for "<< detname <<" element with detid: "
               << rawId <<std::endl;
      continue;
    }

    if ( const StripGeomDetUnit* det = 
         dynamic_cast<const StripGeomDetUnit*>(trackerGeometry_->idToDet((*it)->geographicalId())) )
      {
      // NOTE: why the difference in dets vs. units between these and pixels? The dynamic cast above 
      // fails for many of the detids...
      
      const StripTopology* st = dynamic_cast<const StripTopology*>(&det->specificTopology()); 
      
      if ( st ) 
      {
        //assert(parameters[0] == 0);
        int nstrips = st->nstrips();
        assert(parameters[1] == nstrips);                             
        assert(parameters[2] == st->stripLength());
        
        if( const RadialStripTopology* rst = dynamic_cast<const RadialStripTopology*>(&(det->specificType().specificTopology())) ) 
        {
          assert(parameters[0] == 1);
          assert(parameters[3] == rst->yAxisOrientation());
          assert(parameters[4] == rst->originToIntersection());
          assert(parameters[5] == rst->phiOfOneEdge());
          assert(parameters[6] == rst->angularWidth());

          for ( uint16_t strip = 1; strip <= nstrips; ++strip )
          {
            float stripAngle1 = rst->stripAngle(strip);
            float stripAngle2 = parameters[3] * (parameters[5] + strip*parameters[6]);
        
            assert((stripAngle1-stripAngle2) == 0); 
            
            LocalPoint stripPosition = st->localPosition(strip);
            
            float stripX = parameters[4]*tan(stripAngle2);
            radialStripLocalXs.push_back(stripPosition.x()-stripX);
          }
        }
         
        else if( dynamic_cast<const RectangularStripTopology*>(&(det->specificType().specificTopology())) )
        {
          assert(parameters[0] == 2);
          assert(parameters[3] == st->pitch());

          for ( uint16_t strip = 1; strip <= nstrips; ++strip )
          {
            LocalPoint stripPosition = st->localPosition(strip);
            float stripX = -parameters[1]*0.5*parameters[3];
            stripX += strip*parameters[3];
            rectangularStripLocalXs.push_back(stripPosition.x()-stripX);
          }
        }
        
        else if( dynamic_cast<const TrapezoidalStripTopology*>(&(det->specificType().specificTopology())) )
        {
          assert(parameters[0] == 3); 
          assert(parameters[3] == st->pitch());                               
        }
        
        else
          std::cout<<"Failed to get pitch for "<< detname <<" "<< rawId <<std::endl;
      }
      
      else
        std::cout<<"Failed cast to StripTopology for "<< detname <<" "<< rawId <<std::endl;
    }
    
    //else
    //  std::cout<<"Failed cast to StripGeomDetUnit for "<< detname <<" "<< rawId <<std::endl;
  }

  std::string hn(detname);
  makeHistogram(hn+" radial strip localX", radialStripLocalXs);
  makeHistogram(hn+" rectangular strip localX", rectangularStripLocalXs);
}


void    
ValidateGeometry::compareTransform(const GlobalPoint& gp,
                                   const TGeoMatrix* matrix)
{
  double local[3] = 
    {
      0.0, 0.0, 0.0
    };
      
  double global[3];

  matrix->LocalToMaster(local, global);

  double distance = getDistance(GlobalPoint(global[0], global[1], global[2]), gp);
  globalDistances_.push_back(distance);
}

void 
ValidateGeometry::compareShape(const GeomDet* det, const float* shape)
{
  double shape_topWidth;
  double shape_bottomWidth;
  double shape_length;
  double shape_thickness;

  if ( shape[0] == 1 )
  {
    shape_topWidth = shape[2];
    shape_bottomWidth = shape[1];
    shape_length = shape[4];
    shape_thickness = shape[3];
  }
  
  else if ( shape[0] == 2 )
  {
    shape_topWidth = shape[1];
    shape_bottomWidth = shape[1];
    shape_length = shape[2];
    shape_thickness = shape[3];
  }
  
  else
  {
    std::cout<<"Failed to get box or trapezoid from shape"<<std::endl;
    return;
  }

  double topWidth, bottomWidth;
  double length, thickness;

  const Bounds* bounds = &(det->surface().bounds());
 
  if ( const TrapezoidalPlaneBounds* tpbs = dynamic_cast<const TrapezoidalPlaneBounds*>(bounds) )
  {
      std::array<const float, 4> const & ps = tpbs->parameters();

    assert(ps.size() == 4);
    
    bottomWidth = ps[0];
    topWidth = ps[1];
    thickness = ps[2];
    length = ps[3];
  }

  else if ( (dynamic_cast<const RectangularPlaneBounds*>(bounds)) )
  {
    length = det->surface().bounds().length()*0.5;
    topWidth = det->surface().bounds().width()*0.5;
    bottomWidth = topWidth;
    thickness = det->surface().bounds().thickness()*0.5;
  }
  
  else
  {
    std::cout<<"Failed to get bounds"<<std::endl;
    return;
  }
   
  //assert((tgeotrap && trapezoid) || (tgeobbox && rectangle)); 

  /*
  std::cout<<"topWidth: "<< shape_topWidth <<" "<< topWidth <<std::endl;
  std::cout<<"bottomWidth: "<< shape_bottomWidth <<" "<< bottomWidth <<std::endl;
  std::cout<<"length: "<< shape_length <<" "<< length <<std::endl;
  std::cout<<"thickness: "<< shape_thickness <<" "<< thickness <<std::endl;
  */

  topWidths_.push_back(fabs(shape_topWidth - topWidth));
  bottomWidths_.push_back(fabs(shape_bottomWidth - bottomWidth));
  lengths_.push_back(fabs(shape_length - length));
  thicknesses_.push_back(fabs(shape_thickness - thickness));

  return;
}




double 
ValidateGeometry::getDistance(const GlobalPoint& p1, const GlobalPoint& p2)
{
  /*
  std::cout<<"X: "<< p1.x() <<" "<< p2.x() <<std::endl;
  std::cout<<"Y: "<< p1.y() <<" "<< p2.y() <<std::endl;
  std::cout<<"Z: "<< p1.z() <<" "<< p2.z() <<std::endl;
  */

  return sqrt((p1.x()-p2.x())*(p1.x()-p2.x())+
              (p1.y()-p2.y())*(p1.y()-p2.y())+
              (p1.z()-p2.z())*(p1.z()-p2.z()));
}


void
ValidateGeometry::makeHistograms(const char* detector)
{
  outFile_->cd();

  std::string d(detector);
  
  std::string gdn = d+": distance between points in global coordinates";
  makeHistogram(gdn, globalDistances_);

  std::string twn = d + ": absolute difference between top widths (along X)";
  makeHistogram(twn, topWidths_);

  std::string bwn = d + ": absolute difference between bottom widths (along X)";
  makeHistogram(bwn, bottomWidths_);

  std::string ln = d + ": absolute difference between lengths (along Y)";
  makeHistogram(ln, lengths_);

  std::string tn = d + ": absolute difference between thicknesses (along Z)";
  makeHistogram(tn, thicknesses_);

  return;
}


void
ValidateGeometry::makeHistogram(const std::string& name, std::vector<double>& data)
{
  if ( data.empty() )
    return;

  std::vector<double>::iterator it;
  
  it = std::min_element(data.begin(), data.end());
  double minE = *it;

  it = std::max_element(data.begin(), data.end());
  double maxE = *it;

  std::vector<double>::iterator itEnd = data.end();

  TH1D hist(name.c_str(), name.c_str(), 100, minE*(1+0.10), maxE*(1+0.10));
  
  for ( it = data.begin(); it != itEnd; ++it )
    hist.Fill(*it);
 
  hist.GetXaxis()->SetTitle("[cm]");
  hist.Write();
}

void 
ValidateGeometry::beginJob()
{
  outFile_->cd();
}


void 
ValidateGeometry::endJob() 
{
  std::cout<<"Done. "<<std::endl;
  std::cout<<"Results written to "<< outfileName_ <<std::endl;
  outFile_->Close();
}

DEFINE_FWK_MODULE(ValidateGeometry);