Virtual Monte Carlo (VMC) defines a detector simulation framework that allows to run different simulation Monte Carlo without changing the user code and therefore the input and output format as well as the geometry and detector response definition.
This repository geant3 includes the Geant3.21 and the TGeant3 (Geant3 VMC) package implementing the Virtual Monte Carlo (VMC) interface for Geant3.21.
Documentation: https://vmc-project.github.io