epic/src/CompositeTracker_geo.cpp

0001 // SPDX-License-Identifier: LGPL-3.0-or-later
0002 // Copyright (C) 2022 Sylvester Joosten, Whitney Armstrong
0003
0004 //==========================================================================
0005 //  Based off DD4hep_SubDetectorAssembly
0006 //
0007 //  This is a simple plugin to allow compositing different detectors
0008 //  into a single barrel or endcap for ACTS
0009 //  Note: positive/negative position strings differentiate between
0010 //        positive/negative endcaps
0011 //--------------------------------------------------------------------------
0012
0013 #include "DD4hep/DetFactoryHelper.h"
0014 #include "DD4hep/Printout.h"
0015 #include "XML/Utilities.h"
0016 #include "DD4hepDetectorHelper.h"
0017
0018 using namespace dd4hep;
0019 using namespace dd4hep::detail;
0020
0021 static Ref_t create_element(Detector& description, xml_h e, Ref_t) {
0022   xml_det_t x_det(e);
0023   const std::string det_name = x_det.nameStr();
0024   DetElement sdet(det_name, x_det.id());
0025   Volume vol;
0026   Position pos;
0027
0028   const bool usePos = x_det.hasChild(_U(position));
0029
0030   // Set detector type flag
0031   dd4hep::xml::setDetectorTypeFlag(x_det, sdet);
0032   auto& params = DD4hepDetectorHelper::ensureExtension<dd4hep::rec::VariantParameters>(sdet);
0033
0034   // Add the volume boundary material if configured
0035   for (xml_coll_t bmat(x_det, _Unicode(boundary_material)); bmat; ++bmat) {
0036     xml_comp_t x_boundary_material = bmat;
0037     DD4hepDetectorHelper::xmlToProtoSurfaceMaterial(x_boundary_material, params,
0038                                                     "boundary_material");
0039   }
0040
0041   if (usePos) {
0042     pos = Position(x_det.position().x(), x_det.position().y(), x_det.position().z());
0043   }
0044   vol = Assembly(det_name);
0045   vol.setAttributes(description, x_det.regionStr(), x_det.limitsStr(), x_det.visStr());
0046
0047   Volume mother = description.pickMotherVolume(sdet);
0048   PlacedVolume pv;
0049   if (usePos) {
0050     pv = mother.placeVolume(vol, pos);
0051   } else {
0052     pv = mother.placeVolume(vol);
0053   }
0054   sdet.setPlacement(pv);
0055   for (xml_coll_t c(x_det, _U(composite)); c; ++c) {
0056     xml_dim_t component   = c;
0057     const std::string nam = component.nameStr();
0058     description.declareParent(nam, sdet);
0059   }
0060   return sdet;
0061 }
0062
0063 DECLARE_DETELEMENT(epic_CompositeTracker, create_element)