athena/src/CompositeTracker_geo.cpp

0001 //==========================================================================
0002 //  Based off DD4hep_SubDetectorAssembly
0003 //
0004 //  This is a simple plugin to allow compositing different detectors
0005 //  into a single barrel or endcap for ACTS
0006 //  Note: positive/negative position strings differentiate between
0007 //        positive/negative endcaps
0008 //--------------------------------------------------------------------------
0009
0010 #include "DD4hep/DetFactoryHelper.h"
0011 #include "DD4hep/Printout.h"
0012 #include "XML/Utilities.h"
0013
0014 #if defined(USE_ACTSDD4HEP)
0015 #include "ActsDD4hep/ActsExtension.hpp"
0016 #else
0017 #include "Acts/Plugins/DD4hep/ActsExtension.hpp"
0018 #endif
0019
0020 using namespace dd4hep;
0021 using namespace dd4hep::detail;
0022
0023 static Ref_t create_element(Detector& description, xml_h e, Ref_t)
0024 {
0025   xml_det_t         x_det(e);
0026   const std::string det_name = x_det.nameStr();
0027   DetElement        sdet(det_name, x_det.id());
0028   Volume            vol;
0029   Position          pos;
0030
0031   const bool usePos = x_det.hasChild(_U(position));
0032
0033   sdet.setType("compound");
0034   xml::setDetectorTypeFlag(e, sdet);
0035
0036   const std::string actsType = getAttrOrDefault(x_det, _Unicode(actsType), "endcap");
0037   printout(DEBUG, det_name, "+++ Creating composite tracking detector (type: " + actsType + ")");
0038   assert(actsType == "barrel" || actsType == "endcap");
0039
0040   // ACTS extension
0041   {
0042     Acts::ActsExtension* detWorldExt = new Acts::ActsExtension();
0043     detWorldExt->addType(actsType, "detector");
0044     sdet.addExtension<Acts::ActsExtension>(detWorldExt);
0045   }
0046
0047   if (usePos) {
0048     pos = Position(x_det.position().x(), x_det.position().y(), x_det.position().z());
0049   }
0050   vol = Assembly(det_name);
0051   vol.setAttributes(description, x_det.regionStr(), x_det.limitsStr(), x_det.visStr());
0052
0053   Volume       mother = description.pickMotherVolume(sdet);
0054   PlacedVolume pv;
0055   if (usePos) {
0056     pv = mother.placeVolume(vol, pos);
0057   } else {
0058     pv = mother.placeVolume(vol);
0059   }
0060   sdet.setPlacement(pv);
0061   for (xml_coll_t c(x_det, _U(composite)); c; ++c) {
0062     xml_dim_t         component = c;
0063     const std::string nam       = component.nameStr();
0064     description.declareParent(nam, sdet);
0065   }
0066   return sdet;
0067 }
0068
0069 DECLARE_DETELEMENT(athena_CompositeTracker, create_element)