[eq-dev] using equalizer for custom shaped screens

[Thomas Besson]

On 7/3/07, Stefan Eilemann <eilemann at gmail.com> wrote:
>
>
>
> On 7/3/07, Thomas Besson < thomas.besson at gmail.com> wrote:
>
> >  - non square screens ?
>
>
> Yes - rectangular screens work. But you probably have something else in
> mind!?
>

Sorry I meant non-rectangle displays, and not each one the same size.


The long version:
>
> Right now Equalizer supports a wall description for compounds. A wall
> defines a rectangular area in meters, relative to the origin (viewer) by
> defining the top-left, bottom-left and bottom-right points of the wall.
> Support for projector coordinates (origin, field of view, wall distance) is
> planned.
>
> Movable screens should be easy to support, it is just a matter of finding
> an API so that the application can describe the wall parameters for all
> views to the server. The frustum computation is already done per-frame, so
> it is just a matter of changing the walls.
>
> Are you really moving your screens? I'm just asking because there is
> already a head matrix for tracking.
>

not at the moment but there are some engine-mounted lcd screens already
going on tv shows, and
we sometime use video projectors on "lyre" - I don't know how to say it in
english here is a picture :
http://www.ivstechnologies.com/webfeatures/images/hd/PhotoLyre+BarcoR12.bmp

Anyway, it was just to know the limits, not actual needs that we have right
now, the important one is the ability to use different screens, with
different sizes, resolution, and aspect ratio.
edge blending would be a cool feature too.
http://local.wasp.uwa.edu.au/~pbourke/texture_colour/edgeblend/

-- 
Thomas Besson
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