Using custom objects

[stevebaer]

@Dani_Abalde

My reason for using Custom Objects is to handle the relevant events that a Rhino object takes (transform, duplicate, save, add or remove from the document, …anything else missing?). It seems that UserData doesn’t allow me to handle all this right (just transforms and duplication with the same problem as in Issue 1)? I would have to resort to RhinoDoc events and since I have to do this, I can do it all that way (without UserData I mean), right? or do you think that UserData is better for some reason?

Custom objects are pretty fragile. Simple tasks like moving control points on a curve has the potential to call Replace on the document with non-custom curve geometry resulting in a custom object turning into a non-custom object. UserData in this case does properly get duplicated and attached to the new object.

User data does have callbacks for Read, Write, Duplicate and Transform. Are there other events that you need to watch?

We probably need to add functionality to RhinoCommon to be of any serious help with this project. Is this a possibility or are you constrained to a version of Rhino we aren’t going to be adding SDK enhancements to (pre-Rhino 7)?