From: Tomlinson, Gordon (GORDON.TOMLINSON++at++ca.com)
Date: 11/29/2000 11:33:17
Most of the Performer team if not all
will at I/ITSEC 2000.
If you really need a answer then your better off
email the Performer team directly, as you get
no guarantee when some has time to answer on
the list
Gordon.
_________________________________________________________________
Gordon Tomlinson
Senior Software Engineer
Visualization Engineering
MultiGen-Paradigm Inc
"a Computer Associates Company"
Suite 400, 14900 Landmark Blvd Dallas Texas 75240 USA
Tel: 972 960 2301 ext 309 Fax: 972 960 9049
Email: gordon.tomlinson++at++cai.com <mailto:gordon.tomlinson++at++cai.com>
______________________________________________________________
'Smoke me a kipper, I'll be back before breakfast'
__________________________________________________________________
NOTE:
All opinions here within this email are solely mine and DO NOT
reflect those of Computer Associate CA or any other employee.
-----Original Message-----
From: Anthony Bavuso [mailto:a.t.bavuso++at++larc.nasa.gov]
Sent: Wednesday, November 29, 2000 12:51 PM
To: info-performer++at++sgi.com
Subject: pfEarthSky question....
Is there still SGI support for performer on this list? Is anyone at SGI
going to respond to my problem?
> -----Original Message-----
> From: Anthony Bavuso [SMTP:a.t.bavuso++at++larc.nasa.gov]
> Sent: Wednesday, November 22, 2000 1:43 PM
> To: info-performer++at++sgi.com
> Subject: 3 channels and pfEarthSky
>
> I am having problems with using pfEarthSky in three channels. I have read
> through the archives and found a similar problem to mine in 1999 with the
> subject 'Whatever happened to "Earthsky with 3 channels"' But I did not
> find a good solution that I can use.
>
> I am displaying an out the cockpit terrain database scene on 3 channels on
> 3
> pipes on an Onyx2 each channel having a 40 degree field of view and when
> combined has a total of 120 degree field of view. The 0 channel is on the
> left, the 1 channel is the center, and the 2 channel is on the right. The
> channels are in a channel group with channel 1 as the master and channels
> 0
> and 2 and slaves. My display projectors are all tiled 90 degrees for
> hardware reasons so I use pfChannel::setViewOffsets to offset each channel
> in roll and heading.
>
> ChannelNumber HeadingOffset PitchOffset RollOffset
> 0 (left) 40 0 -90
> 1 (center) 0 0 -90
> 2 (right) -40 0 -90
>
> When I share a common pfEarthSky set to the master channel, I observer the
> following: the sky on the left channel is black, the sky on the center
> channel is correct, and the sky on the right channel is deep blue.
>
> To me it looks like what is happening is that the pfEarthSky performs the
> view offset rotations in a different order than the pfChannel applies them
> for the eyepoint. It looks like the pfEarthSky first performs the roll
> rotation, then performs the heading rotation. Which explains why on my
> left
> channel I am rotated sideways in roll and then down in heading to see only
> black. On the right channel I am rotated sideways in roll and then up in
> heading to see the deep blue sky of the pfEarthSky model near the top of
> the
> sky.
>
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