This example demonstrates integration of the navigation elements of VecGeom, to investigate the performance benefits.

This integration is in development. Supporting Placement volumes – other volumes would be handled by existing Geant4 navigation.

The example loads a GDML file for the geometry, and can execute a batch file (vecgeomNav.in) or run interactive commands or both.

Installation / Configuration

Dependencies

In addition to Geant4, two projects: are required VecGeom and G4VecGeomNav. VecCore is also required, but can be found through VecGeom.

It is optionally possible to use Root in G4VecGeomNav to store voxel information for safety computation. These can require significant computation to calculate if at least one logical volume contains many daughter volume.

Configuration

To configure you must set:

setenv CMAKE_PREFIX_PATH "${VECCORE_DIR}:${VECGEOM_DIR}"

or if you are using Vc from Root

setenv CMAKE_PREFIX_PATH "${ROOTSYS}:${VECGEOM_DIR}"

where VecGeom has also been built with the same installation of Vc from Root.