error in ivview/ivfix

[Seth Teller <teller@lcs.mit.edu>]

sean, fyi, from:

  http://www.geocrawler.com/archives/3/1290/2002/1/0/7553771/

this may be an indication that the MIT DOF contours,
or our revisions of them, have problem geometry.

FROM: John A. Stewart
   DATE: 01/15/2002 05:32:23
   SUBJECT: RE:  [Mesa3d-dev] What does this error mean??
    
   Karl;

   Indeed, I managed to get things better. The interesting thing is that 
   my code now runs on a SGI, core dumps on a linux machine with Nvidea
   drivers, and simply prints an error message under Mesa.

   One error message on the SGI was "need combine callback"; I managed
to
   fix one problem (duplicate vertices, as you indicated) but another
   problem still exists under Mesa.

   I'm learning as I go along; thanks very much for the problem
pointers.

   John Stewart
   Ottawa, Canada.

   > If src-glu, then one explanation might be that the tessellator
can't handle
   > the contour you're passing to it.  There might be a repeated
vertex, the
   > contour might self-intersect, or something else along those lines. 
I've
   > also seen this tesellator go into infinite loops.  I've not seen
your
   > ...