From: Tomlinson, Gordon (GORDON.TOMLINSON++at++ca.com)
Date: 10/17/2000 18:21:51
Hi Ken
The bounding sphere is used first as a rough check for intersections
if sphere passes then performer checks at pfGeoset level which is
a bounding box and much tighter.
You can always reset the bounding sphere to someting tighter and
set it PFBOUND_STATIC so its not recalculated
Gordon.
-----Original Message-----
From: Ken Lindsay
To: info-performer++at++sgi.com
Sent: 10/17/2000 8:27 PM
Subject: almost trivial, but . . .
hi,
I'm setting a bounding volume on some geometry and discover that the
radius of the pfSphere
is almost double what Creator 2.4 generates for the same model. I don't
do any scaling in
performer so the measure should be almost identical to what Creator
calculates, don't you
think? is pfNode->getBound() doing the right thing or is it really
returning the diameter
of the pfSphere or something? I need this for intersection testing so
I'd like to be as
tight as possible for the effect to work well.
thanks
ken
-==-
ken "fire a few neurons" lindsay kl++at++mars.arc.nasa.gov
NASA Ames Research Center QSS Group, Inc.
Bldg 269, Room 281 (650) 604 0461 (lab)
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