g4cad - A freecad workbench for converting CAD files to gdml

People usually spend most of the time developing mass model when developing a Geant4-based Monte Carlo simulation package. For simple geometries, it is relatively easy to describe them using CGS models. However, this becomes almost impossible for complex geometries. G4cad is a workbench for FreeCAD, which is a general-purpose parametric 3D computer-aided design (CAD) modeler. Its features include Material management. Users can define their own materials and set the predefined materials for different solids Adding simple CGS models to existing CAD models Users can define the physical volume names for a solid Users can define tessellation tolerance for each individual solid Convert models to gdml files providing various tools useful for converting CAD models to gdml, like measuring tools, tool to remove small part