This package provides a SimWatcher which invokes the overlap checking tool
of GEANT4. It works on the basis of two untracked parameters: "NodeName"
which tells the name of the physical volume at the node from where
downward the scan of overlap to be performed (if none specified, it starts
from the top of the tree - WorldVolume) and "Resolution" which is the
number of points on the surface used in the search for overlaps.
An example of using this is provided in test/data/run.cfg
The essential addition is
replace g4SimHits.Watchers = {
{ string type = "CheckOverlap"
untracked string NodeName = "HCal"
untracked int32 Resolution = 1000
} }