(New in v2.5.1)
The basic simulator design assumes a single source at a given position . This is important for the roulette simulator which expands around the apparent position corresponding to .
The SourceConstellation makes it possible to add multiple sources
to one constellation. This should work fine with raytrace, but there
is not yet support to manage this with a roulette simulation.
To use a SourceConstellation each constituent source is created as
usual and added to the constellation at a given coordinate,
using the addLens() method.