First off, a quick introduction to others - Marcus has been working on the libmsym library, which is now being used in Avogadro V1.x for point group symmetry detection and symmetrization.
He's been working on what looks like a cool integration for AvoV2...
Was wondering if anyone has some input on rendering symmetry elements in Avogadro v2. There is a need for “disc” (mirror plane)
I think a generic "plane" (e.g., square) would be useful for things like Miller planes in crystals. Some programs also allow you to define a best-fit plane through a set of atoms and then make measurements (e.g., atom X is 4.5Å from the plane, etc.)
and “vector” (rotation axis) geometries as well as alpha in order to make things look good. Im currently using the “cylinder” and “sphere” geometries, but as you can see they are not well suited for the job.
Vector/line would be useful primitives for a number of things.