From: Dorosky, Christopher G (christopher.g.dorosky++at++lmco.com)
Date: 06/11/2002 07:31:11
Here are two separate questions.
1. For some reason, a pfGroup that has only pfSwitches for children,
includes the geometry for
the pfSwitches that are both in some state of on, and PFSWITCH_OFF, in the
bsphere calculations.
Why is switched off geometry included? Is there any way to override this in
the bsphere calculations?
2. pfGetCullResult seems to behave very erratically in the pre-cull. Is it
perhaps getting the previous frame's cull result, since this one hasn't been
calculated yet?
IE.
precullCallback
{
if(pfGetCullResult()==(PFIS_FALSE))
{
return PFTRAV_PRUNE;
}
else
{
do something else
}
The point is to do some pre cull calculations if and only if the object
passes the cull (I am not doing post cull for display list reasons).
If I yaw at high rate, with this on, objects seem to disappear at the edges
for a frame, whereas if the PRUNE is changed to CONT, then everything is
normal.
I am running at least version 2.2.10, whatever comes with IRIX 6.5.12, in
the 2.2 release, on an Onyx2.
Thanks,
Christopher Dorosky
Lead Electronic Systems Engineer - Real Time Simulation, TOPSCENE
Lockheed Martin Missiles and Fire Control - Dallas
christopher.g.dorosky++at++lmco.com
972-603-2349
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