pfPhase()

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William Briggs (stimpy++at++niesten.arc.nasa.gov)
Fri, 17 Jun 94 14:06:08 -0700


We are using: SkyWriter VGXT, IRIX 4.0.5, Performer 1.0

My situation: Our app has always been used with pfPhase set to
              PFPHSE_FREE_RUN. Now we need a fixed frame rate
              for taking experimental data. By setting the
              phase to PFPHASE_LOCK the app is still looping,
              but the display is frozen. I can change at will
              between PFPHASE_LOCK and PFPHASE_FLOAT and the app
              loops with no new display. Whenever I set the phase
              back to PFPHASE_FREE_RUN, the app loops three more
              times, then hangs. I have tried making PFPHASE_LOCK
              the default (so we are not changing it dynamically)
              but with the same results. We have never had any
              problems changing the framerate while in PFPHASE_FREE_RUN.

My questions: How do I get it to work? :^) More specifically, are
              we supposed to be able to change the phase dynamically?
              Is this frozen display a bug in our code, or somewhere
              else? Why would it hang when going to PFPHASE_FREE_RUN?

-------------------+------------------------------+------------------------
William Briggs | MailStop 262-2 | "The computer screen
NASA Ames Research | PO Box 1000 | has become the retina
(415) 604-6438 | Moffett Field, CA 94035-1000 | of the mind's eye."
-------------------+------------------------------+------------------------


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