nearest snap to non-uniformly scaled block

Using 2004.

(setq ent (nentselp "\nSelect pline in a non-uniformly scaled block: "))
(setq pt (osnap (cadr ent) "_NEAR")) ;returns nil

I guess this makes sense since you can't nearest snap to such an object in the
graphics window.

Question: is that the only condition which would cause the osnap function to return
nil? IOW, can I assume for error trapping purposes, the user picked an object type
contained in a non-uniformly scaled block which doesn't support nearest snap?

Note, nearest snap works with a line contained in a non-uniformly scaled block, but
not with a lwpline. I wonder why.

Thanks for any thoughts.

Joe Burke

 

From Juerg in my post "vlax-curve-getclosestpointto... or endpoint of?"

------------------------------------------------------------------------
Forgot one:

Circles, arcs and arc segments in old style polylines, not parallel to the
current UCS have no osnap 'NEAR'.
This is an extremely ugly (and old) bug in AutoCAD.

Cheers

 

Thanks, James. That will need some thought.

Joe Burke