[ REQ 5224]: picky, picky, picky

[roseman at dimension4.math.uiowa.edu]

I am trying to use pick in geomview.  The reson is that I am trying  
to write a module.

In this module I want the user to (possibly) use either Orthographic  
or Perspective projection, possibly changing back and forth. 


The problem seems to be in Orthographic projection.  (This is on a  
Next using the Next version--have not tried other machines or the  
"X-rated" version.)  Pick does not seem to pick properly.  It picks  
points near the hot spot of the coursor, but not quite at it.  I am  
using standard dodecahedron (dodec), with normalization off.

If I use Nose, here's what I see:

In Perspective, when I right click, I see the pick cube appear  
visually "under" the tip of the cursor arrow.

In Orthogonal, when I right click, what happens depends on the  
position of the cursor in the Camera window.  In the middle of the  
window it is as above.  Otherwise, cube  is displaced in a direction  
radially away from the center of the window!  


So it looks like a normalization bug--might be in geomview, might be  
in QuickRenderman.

No time to look into further at the moment.  


D.