Gordon Tomlinson (gordon++at++paradigmsim.com)
Thu, 08 Apr 1999 08:00:49 -0500
When I worked for Pera VR in the UK we had 154º FOV
and had 3 channels driven by Barco projectors we did
the over lap using the projectors. Our Windows and channels
were set up as follows, we Used Vega and Performer all though
you can do it with a bit more effort in Performer.
This worked fine for us , but the edge blending of the projectors
has to be done well and the 3's color,contrast and brightness
match then great :-)
Heres the settings for the window and channels.
( if you have multipipe then the config is slightly different)
Window left = 0
right = 3072
bottom = 0
right = 768
channel:
Left:
left = 0
right = 0.333
bottom = 0
right = 1
HFOV = 56
VFOV = 46
Skew H = 50
------------
Centre:
left = 0.333
right = 0.666
bottom = 0
right = 1
HFOV = 56
VFOV = 46
Skew H = 0
------------
Right:
left = 0.666
right = 1.0
bottom = 0
right = 1
HFOV = 56
VFOV = 46
Skew H = -550
------------
Joaquin Casillas wrote:
> Hello. We are also managing a 3 channel display system (150º FOV, 3
> projectors, curved screen). The projectors need an overlap area to blend
> the edges of the adjacent channels, and we are not sure about the
> correct way to achieve this.
>
> One approach is to overlap the channels from performer code, letting the
> left and right channel to have a heading offset smaller than the fov for
> each channel. Another approach is to overlap the video channels with
> ircombine, and have the performer channels with the same heading offset
> and fov. We think the former is more correct than the latter, although
> if it would be possible to achieve the correct effect with the second
> approach we would be saving some extra drawing.
>
> Any suggestion would be greatly appreciated.
>
> -----------------------------------------------
> Joaquin Casillas Melendez mailto:jcasilla++at++glup.irobot.uv.es
> LISITT (ARTEC) Phone: +34 6 364 2253
> Dept. Electr. & Informatics Addr: Poligono de la Coma s/n
> University of Valencia Valencia (SPAIN)
> -----------------------------------------------------------------------
> List Archives, FAQ, FTP: http://www.sgi.com/software/performer/
> Submissions: info-performer++at++sgi.com
> Admin. requests: info-performer-request++at++sgi.com
--
Regards
Gordon.
Gordon Tomlinson | Multigen - Paradigm Inc Vega Software Engineer | Suite 400, 14900 Landmark Blvd Email: gordon++at++paradigmsim.com | Dallas, Texas 75240, USA Tel: 972 960 2301 | Fax: 972 960 2303 ______________________________________________________________
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This archive was generated by hypermail 2.0b2 on Thu Apr 08 1999 - 05:58:39 PDT