plugins/dd4hep/DDBHMAngular.cc

0001 #include "DataFormats/Math/interface/GeantUnits.h"
0002 #include "DetectorDescription/Core/interface/DDSplit.h"
0003 #include "DetectorDescription/DDCMS/interface/DDPlugins.h"
0004 #include "FWCore/MessageLogger/interface/MessageLogger.h"
0005 #include "DD4hep/DetFactoryHelper.h"
0006
0007 //#define EDM_ML_DEBUG
0008 using namespace geant_units::operators;
0009
0010 static long algorithm(dd4hep::Detector& /* description */, cms::DDParsingContext& ctxt, xml_h e) {
0011   cms::DDNamespace ns(ctxt, e, true);
0012   cms::DDAlgoArguments args(ctxt, e);
0013   int units = args.value<int>("number");
0014   double rr = args.value<double>("radius");
0015   double dphi = args.value<double>("deltaPhi");
0016 #ifdef EDM_ML_DEBUG
0017   edm::LogVerbatim("ForwardGeom") << "DDBHMAngular debug: Parameters for positioning-- " << units
0018                                   << " copies at radius " << convertMmToCm(rr) << " cm with delta(phi) "
0019                                   << convertRadToDeg(dphi);
0020 #endif
0021   std::string rotMat = args.value<std::string>("Rotation");
0022   std::string childName = args.value<std::string>("ChildName");
0023   dd4hep::Volume parent = ns.volume(args.parentName());
0024   dd4hep::Volume child = ns.volume(ns.prepend(childName));
0025 #ifdef EDM_ML_DEBUG
0026   edm::LogVerbatim("ForwardGeom") << "DDBHMAngular debug: Parent " << parent.name() << "\tChild " << child.name()
0027                                   << "\tRotation matrix " << rotMat;
0028 #endif
0029   std::string rotstr = DDSplit(rotMat).first;
0030   dd4hep::Rotation3D rot;
0031   if (rotstr != "NULL") {
0032     rot = ns.rotation(rotMat);
0033   }
0034   static const int startpos = 16;
0035   static const double fac1 = 0.5;
0036   static const double fac2 = 1.5;
0037   for (int jj = 0; jj < units; jj++) {
0038     double driverX(0), driverY(0), driverZ(0);
0039     if (jj < startpos) {
0040       driverX = rr * cos((jj + fac1) * dphi);
0041       driverY = sqrt(rr * rr - driverX * driverX);
0042     } else if (jj == startpos) {
0043       driverX = rr * cos((startpos - fac1) * dphi);
0044       driverY = -sqrt(rr * rr - driverX * driverX);
0045     } else if (jj == startpos + 1) {
0046       driverX = rr * cos((startpos - fac2) * dphi);
0047       driverY = -sqrt(rr * rr - driverX * driverX);
0048     } else if (jj == startpos + 2) {
0049       driverX = rr * cos(fac1 * dphi);
0050       driverY = -sqrt(rr * rr - driverX * driverX);
0051     } else if (jj == startpos + 3) {
0052       driverX = rr * cos(fac2 * dphi);
0053       driverY = -sqrt(rr * rr - driverX * driverX);
0054     }
0055     dd4hep::Position tran(driverX, driverY, driverZ);
0056
0057     parent.placeVolume(child, jj + 1, dd4hep::Transform3D(rot, tran));
0058 #ifdef EDM_ML_DEBUG
0059     edm::LogVerbatim("ForwardGeom") << "DDBHMAngular test: " << child.name() << " number " << jj + 1
0060                                     << " positioned in " << parent.name() << " at " << tran << " with " << rotMat
0061                                     << " : " << rot;
0062 #endif
0063   }
0064   return 1;
0065 }
0066
0067 // first argument is the type from the xml file
0068 DECLARE_DDCMS_DETELEMENT(DDCMS_bhmalgo_DDBHMAngular, algorithm)