Resolve "Implement ci_GEM"

Closes #20 (closed)

src/ci_HCAL.cpp

+#include <XML/Helper.h>
+///////////////////////////
+// Central Ion GEM
+///////////////////////////
+
+using namespace dd4hep;
+
+static Ref_t createDetector(Detector& desc, xml_h handle, SensitiveDetector sens)
+{
+
+  xml::DetElement detElem = handle;
+  std::string     detName = "ci_HCAL";
+  int             detID   = 1;
+
+  //xml::Component dims = detElem.dimensions();
+  //Envelope volume specs
+  double RIn     = 0.   * dd4hep::cm;
+  double ROut    = 300. * dd4hep::cm;
+  double SizeZ   = 160. * dd4hep::cm;
+  double ShiftZ  = 5.   * dd4hep::cm;
+  double PosZ    = 0.   * dd4hep::cm;
+  double det_RIn = 80.  * dd4hep::cm;
+  Material mat_iron  = desc.material("Iron");
+  Material mat_air   = desc.material("Air");
+  Material mat_vac   = desc.material("Vacuum")
+
+
+  
+  Tube         ci_Hcal_Solid(RIn, ROut, SizeZ / 2., 0., 360 * deg);
+  Volume       envelopeVol("ci_Hcal_Logic", ci_Hcal_Solid, mat_vac);//check that this one is iron
+  envelopeVol.setVisAttributes(0.3, 0, 3.0, 0.1);
+
+  //Layer Specs
+  double det_ROut       = ROut - 1. * dd4hep::cm;
+  double det_ThicknessZ = 2.        * dd4hep::cm;
+  double det_GapZ       = 2.        * dd4hep::cm;
+  double Nlay           = 20;
+
+  Tube         ci_Hcal_detSolid(RIn, det_ROut, det_ThicknessZ / 2., 0., 360 * deg);
+  //Volume       detVol("ci_Hcal_det_Logic", ci_Hcal_detSolid, mat_iron);//extraneous
+  //detVol.setVisAttributes(0.6, 0, 0.6, 1);
+
+
+  
+  //Adding layers to placed detector volume
+  for (int lNum = 0; lNum < Nlay; lNum++){
+  	//xml_comp_t x_layer = c;
+  	string layer_name = detName + _toString(lNum, "_layer%d");
+  	double layer_Posz = -SizeZ / 2. + (lNum + 1) * det_ThicknessZ + (lNum + 1) * 5. * ddphep::cm;
+  	
+    Volume layer_vol(layer_name, ci_Hcal_detSolid, mat_iron);
+  	Position layer_pos(0, 0, layer_Posz);
+  	//DetElement layer(envelope_det, layer_name, detID);
+  	//layer.setVisAttributes(desc.visAttributes(det.visStr()));
+  	//layer.setAttributes(desc, layer_vol, desc.region(), desc.limits(), );//(region, limits, visable).
+  	PlacedVolume layer_phv = envelopeVol.placeVolume(layer_vol, layer_pos);
+  	layer_phv.addPhysVolID("layer", layerNum);
+  }
+
+  DetElement   det(detName, detID);
+  Volume       motherVol = desc.pickMotherVolume(det);
+  PlacedVolume detPV     = motherVol.placeVolume(envelopeVol, RotationZYX(0,0,0));
+  det.setPlacement(detPV);
+
+  return det;
+}
+// clang-format off
+DECLARE_DETELEMENT(ci_GEM, createDetector)