@bluetale said: thx But I receive an error if the faces normal is parallel to Z_AXIS. I have added the following lines and it seems to work, but is it the correct solution? if !vector.parallel?(Z_AXIS) then > up = Z_AXIS > else > up = Y_AXIS > end It's a good trap! PS you don't need the 'then' and perhaps more 'simply' put if vector.parallel?(Z_AXIS) up = Y_AXIS else up = Z_AXIS end

No. You can stack your own Ruby Tools - but you can't stack the native ones unfortunately. You've have to recreate the tool.

@bluetale said: @dan rathbun said: I think you need to use MF_CHECKED for the active item, and MF_UNCHECKED (or MF_ENABLED ) for the other two. I tried it, but it did not work. Is there a way to get a radiobutton-like behaviour of toolbar-buttons? ..snip... Is there a way to get such a behaviour as explained above for the mac-version? There may be a bug in the Mac version. I see this issue has been discussed in more detail in your more recent topic: Toolbar Win vs Mac http://forums.sketchucation.com/viewtopic.php?f=180&t=32626

thanks for your advice, I will try your suggested methods.

A polygon mesh is all just triangles? hmm... That would be interesting for the Normal Probe I just made...