CVS commits overview, a new feature and a bug fix

[James W. W. <ja...@wr...>]

I just committed changes to QuesaCustomElements.h, 
E3CustomElements.c, and E3View.c to do two things:

1.  Added pre and post-submit callbacks for picking, in analogy to 
the callbacks for rendering.

2.  Fixed a bug in picking involving certain decomposable objects. 
For example, consider a cylinder with both end caps.  If you clicked 
the top end cap, then a hit was detected but no object was returned 
by the pick.  This had to do with the fact that 
E3View_PickStack_PopGroup was clearing the picked object.

I also made a change to Geom Test to reveal this bug.
-- 
   James W. Walker, ScriptPerfection Enterprises, Inc.
   <http://www.write-brain.com/>