Re: Picture wobbling

New Message Reply Date view Thread view Subject view Author view

Angus Dorbie (dorbie++at++multipass)
Mon, 8 Dec 1997 11:53:21 -0800


You need to genlock the pipes,
then swapready them.

Generally I find the second step isn't required if you set
the pfPhase to PFPHASE_LIMIT, but genlock wiring and genlocked
video settings are essential.

Get Len to ask Graham Jackson to get Graham Russell
there to help you if you have any problems genlocking.

On ONYX(1) you need to setmon -g to gnlock two of the pipes
and wire the sync from the non genlocked piped to
gen in on one pipe then loop through gen out on that pipe
to the third pipe then terminate gen out.

Cheers,
Angus.

On Dec 1, 10:49am, Pete Smithies wrote:
> Subject: Picture wobbling
> Hi there,
>
> I have a flight simulator application producing a three channel output
> consisting of centre , left and right . The left and right channels are
> pfAttached to the centre thus sharing channel attributes including , I
> assume PFCHAN_SWAPBUFFERS.
>
> The problem is , often , the channels update out of sync producing a
> 'picture wobble' effect. The left and right channels appear to display
> this tendency most frequently.
>
> Is this a phenomena observed by others or am I doing something wrong.
> Thinking It may be the time taken to draw a channel I have tried
> lowering the frame rate and still this is observed.
>
> The kit we are using Is a 4 processor ,2 RM, Onyx RE2 with 64MB ram.
> Any suggestions to a solution would be greatly appreciated.
>
> Ta Very Much.
>
> --
>
> Pete Smithies, Visual Software Engineer,
> Intersim Limited, Units 7-8, Thorgate Road, Littlehampton. Sussex. UK
> Tel: +44 (0)1903 733428 Fax: +44 (0)1903 730246
> email: modellers++at++intersim.co.uk Internet: http://www.intersim.co.uk
>
>
> =======================================================================
> List Archives, FAQ, FTP: http://www.sgi.com/Technology/Performer/
> Submissions: info-performer++at++sgi.com
> Admin. requests: info-performer-request++at++sgi.com
>-- End of excerpt from Pete Smithies

=======================================================================
List Archives, FAQ, FTP: http://www.sgi.com/Technology/Performer/
            Submissions: info-performer++at++sgi.com
        Admin. requests: info-performer-request++at++sgi.com


New Message Reply Date view Thread view Subject view Author view

This archive was generated by hypermail 2.0b2 on Mon Aug 10 1998 - 17:56:21 PDT

This message has been cleansed for anti-spam protection. Replace '++at++' in any mail addresses with the '@' symbol.