Problem with Tcl/TK and AC3D

[thierry_st_malo]

I am writing a script to implement 3D guidelines (a very useful measurement and alignment tool) in AC3D.
For this I need to read the coordinates of the currently selected vertices.

I begin with:
set Vertex [ list ]

If there is only one vertex selected, no problem:
set Vertex [ ac3d get_selection_centre ]

If there are several selected vertices, I thought I could use:
set Vertex [ ac3d get_selected_objects ]

Apparently, what is returned is an empty list.
Can you help?

Thierry

[Andy]

That will give you a list of the AC3D objects (which will be nothing in vertex or surface mode).

I don't think it's possible to do what you want in a script but it should be easy to add some new commands. If you can give me more info on the commands you would like to see inside AC3D, I may be able to add them.

[thierry_st_malo]

I'm fairly confident that what I want to do can be done in a script, given two new commands.
First of all, let me convince you that I am serious about this by completing the 3D guideline script (for which I don't need anything new). At the moment, here is the GUI. It will show what I mean by "3D guideline".
Cheers,
Thierry