Allow user to set up the real space scene geometry
SceneGeometry.h
has a number of hard-coded scene parameters. We can allow users to change them.
struct SceneGeometry {
double layerSize = 100.0;
double layerBorderWidth = 5.0;
double topOrBottomLayerThickness = 25.0;
double layerMinimumThickness = 2.0;
unsigned long long maxNumberOfParticlesToShow = 20000;
};