ME0GeometryBuilderFromDDD.cc

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#include "Geometry/GEMGeometryBuilder/src/ME0GeometryBuilderFromDDD.h"
#include "Geometry/GEMGeometry/interface/ME0Geometry.h"
#include "Geometry/GEMGeometry/interface/ME0Chamber.h"
#include "Geometry/GEMGeometry/interface/ME0EtaPartitionSpecs.h"

#include "DetectorDescription/Core/interface/DDFilter.h"
#include "DetectorDescription/Core/interface/DDFilteredView.h"
#include "DetectorDescription/Core/interface/DDSolid.h"

#include "Geometry/MuonNumbering/interface/MuonDDDNumbering.h"
#include "Geometry/MuonNumbering/interface/MuonBaseNumber.h"
#include "Geometry/MuonNumbering/interface/ME0NumberingScheme.h"

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

#include "DataFormats/GeometryVector/interface/Basic3DVector.h"

#include "CLHEP/Units/GlobalSystemOfUnits.h"
#include "FWCore/MessageLogger/interface/MessageLogger.h"

#include <algorithm>
#include <iostream>
#include <string>

ME0GeometryBuilderFromDDD::ME0GeometryBuilderFromDDD()
{ 
  LogDebug("ME0GeometryBuilderfromDDD") <<"[ME0GeometryBuilderFromDDD::constructor]";
}

ME0GeometryBuilderFromDDD::~ME0GeometryBuilderFromDDD() 
{ }

ME0Geometry* ME0GeometryBuilderFromDDD::build(const DDCompactView* cview, const MuonDDDConstants& muonConstants)
{
  std::string attribute = "ReadOutName";
  std::string value     = "MuonME0Hits";

  // Asking only for the MuonME0's
  DDSpecificsMatchesValueFilter filter{DDValue(attribute, value, 0.0)};
  DDFilteredView fview(*cview,filter);

  return this->buildGeometry(fview, muonConstants);
}

ME0Geometry* ME0GeometryBuilderFromDDD::buildGeometry(DDFilteredView& fview, const MuonDDDConstants& muonConstants)
{
  LogDebug("ME0GeometryBuilderFromDDD") <<"Building the geometry service";
  ME0Geometry* geometry = new ME0Geometry();

  LogDebug("ME0GeometryBuilderFromDDD") << "About to run through the ME0 structure\n" 
                    <<" First logical part "
                    <<fview.logicalPart().name().name();

  bool doSubDets = fview.firstChild();
 
  LogDebug("ME0GeometryBuilderFromDDD") << "doSubDets = " << doSubDets;

  LogDebug("ME0GeometryBuilderFromDDD") <<"start the loop"; 

  int nChambers(0);
  while (doSubDets)
  {
    // Get the Base Muon Number
    MuonDDDNumbering mdddnum(muonConstants);
    LogDebug("ME0GeometryBuilderFromDDD") <<"Getting the Muon base Number";
    MuonBaseNumber mbn = mdddnum.geoHistoryToBaseNumber(fview.geoHistory());

    LogDebug("ME0GeometryBuilderFromDDD") <<"Start the ME0 Numbering Schema";
    ME0NumberingScheme me0num(muonConstants);

    ME0DetId rollDetId(me0num.baseNumberToUnitNumber(mbn));
    LogDebug("ME0GeometryBuilderFromDDD") << "ME0 eta partition rawId: " << rollDetId.rawId() << ", detId: " << rollDetId;

    // chamber id for this partition. everything is the same; but partition number is 0 and layer number is 0.
    LogDebug("ME0GeometryBuilderFromDDD") << "ME0 chamber rawId: " << ME0DetId(rollDetId.chamberId()).rawId() << ", detId: " << ME0DetId(rollDetId.chamberId());

    if (rollDetId.roll()==1) ++nChambers;

    std::vector<double> dpar=fview.logicalPart().solid().parameters();
    std::string name = fview.logicalPart().name().name();
    DDTranslation tran = fview.translation();
    DDRotationMatrix rota = fview.rotation();
    Surface::PositionType pos(tran.x()/cm, tran.y()/cm, tran.z()/cm);

    DD3Vector x, y, z;
    rota.GetComponents(x,y,z);

    Surface::RotationType rot(float(x.X()), float(x.Y()), float(x.Z()),
                  float(y.X()), float(y.Y()), float(y.Z()),
                  float(z.X()), float(z.Y()), float(z.Z())); 
    
    float be = dpar[4]/cm; // half bottom edge
    float te = dpar[8]/cm; // half top edge
    float ap = dpar[0]/cm; // half apothem
    float ti = 0.4/cm;     // half thickness

    //  TrapezoidalPlaneBounds* 
    Bounds* bounds = new TrapezoidalPlaneBounds(be, te, ap, ti);

    std::vector<float> pars;
    pars.emplace_back(be); 
    pars.emplace_back(te); 
    pars.emplace_back(ap);
    float nStrips = -999.;
    float nPads = -999.;
    pars.emplace_back(nStrips);
    pars.emplace_back(nPads);

    LogDebug("ME0GeometryBuilderFromDDD") 
      << "ME0 " << name << " par " << be << " " << te << " " << ap << " " << dpar[0];
    
    ME0EtaPartitionSpecs* e_p_specs = new ME0EtaPartitionSpecs(GeomDetEnumerators::ME0, name, pars);

    //Change of axes for the forward
    Basic3DVector<float> newX(1.,0.,0.);
    Basic3DVector<float> newY(0.,0.,1.);
    newY *= -1;
    Basic3DVector<float> newZ(0.,1.,0.);
    rot.rotateAxes (newX, newY, newZ);
    
    BoundPlane* bp = new BoundPlane(pos, rot, bounds);
    ReferenceCountingPointer<BoundPlane> surf(bp);

    // Set EtaPartition of RollDetId equal to 1
    ME0DetId rollDetId2(rollDetId.region(),rollDetId.layer(),rollDetId.station(),1);
    ME0EtaPartition* mep = new ME0EtaPartition(rollDetId2, surf, e_p_specs);

    // For Nick ... build also the layer
    ME0DetId layerDetId(rollDetId.layerId());
    ME0Layer* ml = new ME0Layer(layerDetId, surf);

    // Add the eta partition to the geometry
    geometry->add(mep);
    // Add the eta partition to the layer
    ml->add(mep);
    // Add the layer to the geometry
    geometry->add(ml);

    // go to next layer
    doSubDets = fview.nextSibling(); 
  }
  
  auto& partitions(geometry->etaPartitions());
  // build the chambers and add them to the geometry
  std::vector<ME0DetId> vDetId;
  int oldLayerNumber = 1;
  for (unsigned i=1; i<=partitions.size(); ++i){
    ME0DetId detId(partitions.at(i-1)->id());
    LogDebug("ME0GeometryBuilderFromDDD") << "Making ME0DetId = " <<detId;

    const int layerNumber(detId.layer());
    if (layerNumber < oldLayerNumber || i == partitions.size()) {

      // don't forget the last partition for the last chamber
      if (i == partitions.size()) vDetId.emplace_back(detId);

      ME0DetId fId(vDetId.front());
      ME0DetId chamberId(fId.chamberId());
      LogDebug("ME0GeometryBuilderFromDDD") << "ME0DetId = " << fId ;
      LogDebug("ME0GeometryBuilderFromDDD") << "ME0ChamberId = " << chamberId ;
      // compute the overall boundplane using the first eta partition
      const ME0EtaPartition* p(geometry->etaPartition(fId));
      const BoundPlane& bps = p->surface();
      BoundPlane* bp = const_cast<BoundPlane*>(&bps);
      ReferenceCountingPointer<BoundPlane> surf(bp);
      
      ME0Chamber* ch = new ME0Chamber(chamberId, surf); 
      LogDebug("ME0GeometryBuilderFromDDD")  << "Creating chamber " << chamberId << " with " << vDetId.size() << " eta partitions";
      
      for(auto id : vDetId){
    LogDebug("ME0GeometryBuilderFromDDD") << "Adding eta partition " << id << " to ME0 chamber";
    ch->add(const_cast<ME0EtaPartition*>(geometry->etaPartition(id)));
      }

      LogDebug("ME0GeometryBuilderFromDDD") << "Adding the chamber to the geometry";
      geometry->add(ch);
      vDetId.clear();
    }
    vDetId.emplace_back(detId);
    oldLayerNumber = layerNumber;
  }
  
  return geometry;
}