Re: the new pfMQueryHit()

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Jim Helman (jimh++at++surreal)
Mon, 11 Oct 93 11:12:26 -0700

  Date: Mon, 11 Oct 93 12:11:00 -0400
  From: marrou++at++melange.vsl.ist.ucf.edu (Lance Marrou)
  To: info-performer++at++sgi.sgi.com
  Subject: the new pfMQueryHit()
   
  Does the pfMQueryHit() in v1.2 (Beta) return world coordinates
  for the PFQHIT_POINT vector? If not, where is the transformation?
  Also, is the PFQHIT_NORM vector normalized?
   
As with the now defunct pfIsect structure, the point is in local
coordinates. You *would* be able to get the transformation both in
discriminator callbacks and upon return of pfSegsIsectNode, except
for a bug in the beta (alpha 53), which has since been fixed. The
normal is normalized.

  So far, these new intersection routines seem a lot easier to
  implement

Good.

  but the man pages are horrible.

What would you like to see more detail on?

  pfSegsIsectNode() doesn't even exist in our copy! :)

Then something went wrong with your inst. I just double checked both
the Irix4 (/usr/catman/p_man/cat3/Performer_pf/pfSegsIsectNode.z) and
Irix5 (/usr/share/catman/p_man/cat3/Performer_pf/pfSegsIsectNode.z)
distributions.
   
rgds,

-jim helman

jimh++at++surreal.asd.sgi.com
415/390-1151

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