Towards an automatic geometry conversion: TGeoArbN — a ROOT-compatible triangle mesh geometry implementation

TGeoArbN is developed as a tool to automate the process of converting Computer Aided Design (CAD) models into ROOT geometries for physics simulations using the Virtual Monte Carlo (VMC) package. ROOT’s geometry package currently has a capability gap when it comes to handling arbitrary shapes. This, however, is central to automatically convert CAD models into simulatable ROOT geometries. To overcome this particular problem a ROOT-compatible geometry class called TGeoArbN was created to allow the use of triangle meshes in simulations using ROOT’s geometry package in combination with VMC. These triangle meshes can then be used to represent complex CAD parts without any more work needed.