Nacho Sanz-Pastor Computer Arts + Developments VISSIM Div. (nacho++at++comarts.es)
Mon, 6 Feb 95 17:47:45 GMT
There is a Peformer MP issue that we have been discussing for some time
now, with both SGI and non SGI users, in Spain, Cortaillod and France.
Since we have been unable to reach a definitive conclusion, I would like
to open its discussion in the info performer , since we feel this same
issue could be of interest for more users.
Ok, there it goes:
When you fork the Intersections with PFMP_FORK_ISECT, a new asyncronous
process is created for the length of the Isect call. Is that correct ?
Why does the man page say isect can be syncr. or asyncr. ?
Does a buffered copy of the data get created then ? What if your app
modifies vertex positions for each frame ? Do you have to buffer that
by yourself ?
What if you miss a frame, extending the forked process into the next frame ?
Would you just get the previous frame isect data ? Is there a method for
monitoring frame skips ?
When you fork additional processes , Do you have to buffer the data by
yourself ? You have to share memory and put everything in PassIsectData ?
Besides those MP doubts,
If a geoset has no normals and you ask for them in the isect, what you get?
Are they computed ?
I hope all this is useful for somebody.
Thanks in advance, best regards.
Nacho Sanz-Pastor nacho++at++comarts.es
Computer Arts & Developments
Anita Vindel 10 bajo
28023 Madrid Spain
tel ++ 34 1 357 27 51 fax ++ 34 1 307 03 39
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Computer Arts & Developments Visual Simulation Group
An asteriod has crashed on Earth, and the Dinosaurs are close to being extinct
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