disp_geom.C

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void disp_geom()
{
  gGeoManager = TGeoManager::Import("geom.root");
  //gGeoManager = TGeoManager::Import("GenFitExtrapolatorGeom.root");
  //gGeoManager->Export("geom.root");
  TGeoNode *current = gGeoManager->GetCurrentNode();
  current->GetVolume()->Draw("ogl");
}