SimpleDetector/src/AirTube_geo.cpp

0001 //====================================================================
0002 //  // Simple tube filled with air
0003 //  // used for tracking purposes ...
0004 //
0005 //--------------------------------------------------------------------
0006 //
0007 //  Author     : F.Gaede
0008 //
0009 //====================================================================
0010 #include "DD4hep/DetFactoryHelper.h"
0011
0012 #include "DDRec/Surface.h"
0013 #include "DDRec/DetectorData.h"
0014
0015
0016 using namespace dd4hep;
0017 using namespace dd4hep::detail;
0018 using namespace dd4hep::rec ;
0019
0020 static Ref_t create_element(Detector& description, xml_h e, SensitiveDetector /* sens */)  {
0021
0022   xml_det_t    x_det = e;
0023   std::string  name  = x_det.nameStr();
0024
0025   DetElement airTube( name, x_det.id()  ) ;
0026
0027   PlacedVolume pv;
0028
0029   // ----- read xml ----------------------
0030
0031   xml_dim_t dim = x_det.dimensions();
0032
0033   double inner_r    =  dim.rmin() ;
0034   double outer_r    =  dim.rmax() ;
0035   double z_half     =  dim.zhalf() ;
0036   double tube_thick =  outer_r - inner_r ;
0037
0038   //--------------------------------------
0039
0040   Tube   tubeSolid (inner_r, outer_r, z_half ) ;
0041
0042   Volume tube_vol( name+"_inner_cylinder_air", tubeSolid ,  description.material("Air") ) ;
0043
0044   Vector3D ocyl(  inner_r + 0.5*tube_thick , 0. , 0. ) ;
0045
0046   VolCylinder cylSurf( tube_vol , SurfaceType( SurfaceType::Helper ) , 0.5*tube_thick  , 0.5*tube_thick , ocyl ) ;
0047
0048   volSurfaceList( airTube )->push_back( cylSurf ) ;
0049
0050
0051   //--------------------------------------
0052
0053   Volume mother =  description.pickMotherVolume( airTube ) ;
0054
0055   pv = mother.placeVolume( tube_vol ) ;
0056
0057   pv.addPhysVolID( "system", x_det.id() )  ;
0058
0059   airTube.setPlacement( pv );
0060
0061   return airTube;
0062 }
0063
0064 DECLARE_DETELEMENT( AirTube,create_element)