Eric Heft (eheft++at++dnaco.net)
Thu, 3 Oct 1996 17:36:36 -0400 (EDT)
I'd like to thank all the nice people who pointed me in the right
direction for doing a star field simulation using 400 points at
60 hz. The next problem is maintaining the frame rate when using
our MCO to display Left/Center/Right sides.
Hardware:
1 Onyx, 2 100mz CPU's with 64 megs ram.
2 RM's, 1 hardware pipeline, and the MCO.
Currently , I've modified the code in lpstate.c to have the points
randomly thoughout an area, then inbetween pfSync and pfFrame I
translate each point along the y-axis toward the viewer. When the
y value is < 0 , reset the point randomly in the volume. With this
pretty staight forward method I'm getting a steady 60 hz.
I then switched the MCO to 3++at++960x680(?). With no mods to my program
the frame rate goes from 60 to 8.6! Checking the stats , the draw
part has jumped from 9.5 msec to 90 msec! I've try different cpu
models with no luck. Anyone have any ideas on what to try next?
Eventually I'm supposed to be displaying 3 views of the field on each
channel, hopefully at 30+ hz.
Thanks for any advice you can give this performer newbie :)
-- Eric
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