Re: pfBuffer
John Rohlf (jrohlf++at++tubes)
Wed, 31 Jan 96 12:02:07 PST
>
> pfBuffers seem to act differently in the Performer 2.0 release than they did in
> the beta version that I had been playing with before. So far, I've had too
> different symptoms that I had not seen in previous attempts at using the
> buffers for database changes.
>
> With the beta version, I was able to simulate a switch node (sort of) by
> performing successive bufferRemoveChild, bufferAddChild calls in a forked
> process. Basically, I set things up, forked my process, created a new
> pfBuffer, selected the buffer, loaded two models, then began alternating the
> buffered add and removes to make the models switch in the scene graph being
> generated by the Performer process. (Keep in mind this was just a quick test
> program) Today, I recompiled this code with the release version of 2.0, and
> now I can't seem to get the same results. I've tracked the problem down to
> pfBuffer::merge, and even deeper where the merge seems to die in
> pfGroup::nb_clean() or something like that.
A bug in 2.0 requires you to create parents before children
in the DBASE task. Death in pfGroup::nb_clean() is symptomatic of
this problem.
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on Mon Aug 10 1998 - 17:52:19 PDT