Hi Enrico, hi Dirk,
On Mon, 4 Jul 2005, Dirk Reiners wrote:
On Mon, 2005-07-04 at 16:21 +0200, Enrico Borrione wrote:
Unfortunately i am still stuck on the first part. I dunno if it is even
possible from the client side to get the server texture chunks and edit
em separately. What do you think? Is it possible? If not... is there
another fast way to achieve the very same result?
The easiest way would be to use a Foreground. The best bet right now is
the PolygonForeground, with a gradient texture. I know Akos has done
something similar. Akos, what did you end up doing?
I simply modified the clusterServers to draw blended quads using plain
OpenGL to cover the overlapped areas (left and/or right side) after
rendering the OpenSG stuff. I actually never got around finishing it (i.e.
playing around with the blending parameters) with the old Powerwall at the
geoinformation-institute (and I don't have access to that wall currently)
and on our Powerwall the overlap is much less of an issue, so I can't
really say how well it works in practice.
With the PolygonForeground approach you have the problem that you must
have different Foregrounds on different servers, which might make your
life a bit more difficult, but I've never tried that. Anyway, I believe
that modifying the clusterServer is more practical since then you can
forget about adding chunks and stuff into all of your applications/scenes,
and once you get it right with your wall it will be completely transparent
for your apps. BTW I use command line parameters to pass the information
to the clusterServers about which sides to draw blends on, which are
written into the scripts that start/stop the servers on the
cluster-computers so that it's also transparent to the app. I think I sent
the code to Khai Binh Duong to try it on their wall, perhaps he can
comment on how well this method worked at their site.
Hope this helps,
Akos
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