DDHCalXtalAlgo.cc

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// File: DDHCalXtalAlgo.cc
// Description: Positioning the crystal (layers) in the mother volume

#include <cmath>
#include <algorithm>

#include "FWCore/MessageLogger/interface/MessageLogger.h"
#include "DataFormats/Math/interface/GeantUnits.h"
#include "DetectorDescription/Core/interface/DDLogicalPart.h"
#include "DetectorDescription/Core/interface/DDCurrentNamespace.h"
#include "Geometry/HcalAlgo/plugins/DDHCalXtalAlgo.h"

//#define EDM_ML_DEBUG
using namespace geant_units::operators;

DDHCalXtalAlgo::DDHCalXtalAlgo() {
#ifdef EDM_ML_DEBUG
  edm::LogVerbatim("HCalGeom") << "DDHCalXtalAlgo info: Creating an instance";
#endif
}

DDHCalXtalAlgo::~DDHCalXtalAlgo() {}

void DDHCalXtalAlgo::initialize(const DDNumericArguments & nArgs,
                const DDVectorArguments & ,
                const DDMapArguments & ,
                const DDStringArguments & sArgs,
                const DDStringVectorArguments & vsArgs) {

  radius     = nArgs["Radius"];
  offset     = nArgs["Offset"];
  dx         = nArgs["Dx"];
  dz         = nArgs["Dz"];
  angwidth   = nArgs["AngWidth"];
  iaxis      = int (nArgs["Axis"]);
  names      = vsArgs["Names"];

#ifdef EDM_ML_DEBUG
  edm::LogVerbatim("HCalGeom") << "DDHCalXtalAlgo::Parameters for positioning:"
                   << " Axis " << iaxis << "\tRadius " << radius 
                   << "\tOffset " << offset << "\tDx " << dx
                   << "\tDz " << dz << "\tAngWidth " 
                   << convertRadToDeg(angwidth) << "\tNumbers "
                   << names.size();
  for (unsigned int i = 0; i < names.size(); i++)
    edm::LogVerbatim("HCalGeom") << "\tnames[" << i << "] = " << names[i];
#endif
  idNameSpace = DDCurrentNamespace::ns();
  idName      = sArgs["ChildName"]; 
#ifdef EDM_ML_DEBUG
  edm::LogVerbatim("HCalGeom") << "DDHCalXtalAlgo: Parent " << parent().name()
                   << "\tChild " << idName << " NameSpace "
                   << idNameSpace;
#endif
}

void DDHCalXtalAlgo::execute(DDCompactView& cpv) {

  double theta[3], phi[3], pos[3];
  phi[0] = 0;
  phi[1] = 90._deg;
  theta[1-iaxis] = 90._deg;
  pos[1-iaxis]   = 0;
  int number = (int)(names.size());
  for (int i=0; i<number; i++) {
    double angle = 0.5*angwidth*(2*i+1-number);
    theta[iaxis] = 90._deg + angle;
    if (angle>0) {
      theta[2]   = angle;
      phi[2]     = iaxis*90._deg;
    } else {
      theta[2]   =-angle;
      phi[2]     = (2-3*iaxis)*90._deg;
    }
    pos[iaxis]   = angle*(dz+radius);
    pos[2]       = dx*std::abs(sin(angle)) + offset;
  
    DDRotation rotation;
    std::string rotstr = names[i];
    DDTranslation tran(pos[0], pos[1], pos[2]);
    DDName parentName = parent().name(); 

    static const double tol = 0.01_deg; // 0.01 degree
    if (std::abs(angle) > tol) {
#ifdef EDM_ML_DEBUG
      edm::LogVerbatim("HCalGeom") << "DDHCalXtalAlgo: Creating a rotation " 
                   << rotstr << "\t" 
                   << convertRadToDeg(theta[0]) << "," 
                   << convertRadToDeg(phi[0]) << "," 
                   << convertRadToDeg(theta[1]) << "," 
                   << convertRadToDeg(phi[1]) << "," 
                   << convertRadToDeg(theta[2]) << ","
                   << convertRadToDeg(phi[2]);
#endif
      rotation = DDrot(DDName(rotstr, idNameSpace), theta[0], phi[0], theta[1],
               phi[1], theta[2], phi[2]);
    }
    cpv.position(DDName(idName, idNameSpace), parentName, i+1, tran, rotation);
#ifdef EDM_ML_DEBUG
    edm::LogVerbatim("HCalGeom") << "DDHCalXtalAlgo: "
                 << DDName(idName,idNameSpace) << " number "
                 << i+1 << " positioned in " << parentName
                 << " at " << tran << " with " << rotation;
#endif
  }
}