The OpenSG Scenegraph

Hi Aleksander,

Aleksander Stroin'ski wrote:
> Hi,
> 
> I want to run OpenSG application in Windows Compute Cluster Server(WCCS).
> On each cluster node is running 12ClusterServer app (exactly the same as this in tutorial), 
> and there is a one computer with monitor which runs 28SortLastClusterClient to display scene
> (exactly the same as this in tutorial).
> 
> There is a little problem, because WCCS doeasn't let application to open its own window.
> When i start both application(only for test: there are 2 machines - one cluster node and one display machine)
> I get black screen on display machine(which is running 28SortLastClusterClient) 
> and in the concole this error:
> "WARNING:  Window::frameExit: Caught stray OpenGL error invalid enumerant (0x500)". 
> Each movement of mouse generate the same WARNING.
> 
> i think the problem is in "creating window".
> 12ClusterServer want to open its own window but it cant(because WCCS doesn't let for this).
> 
> It is possible to create OpenSG app without window(create ClusterServer object without window)??

I don't know much (i.e. anything ;) about WCCS, so I'm not sure what 
exactly creating window means.

If you're not allowed to open any window that's a problem that we 
probably won't be able to get around. You have to have a window handle 
(HWND) to access OpenGL. If it's just about
having an actual displayed window that should be possible by using an 
FBOWindow for rendering, which is not actually visible anywhere.

But then again, I don't use Windows very much, so I might be missing 
something here. Anybody else tried this before?

Yours

	Dirk

hi

>  If you're not allowed to open any window that's a problem that we
>  probably won't be able to get around. You have to have a window handle
>  (HWND) to access OpenGL. If it's just about
>  having an actual displayed window that should be possible by using an
>  FBOWindow for rendering, which is not actually visible anywhere.

i ve just recently used mesa3d on windows (osmesa) with opensg's
passivewindow to have absolutly no window at all for my 3d stuff.

works quite nice.

br, mathias
-- 
 [uid] mathias gumz [mail] akira at fluxbox dot org [pgp] 1024D/F6F6B18C
 [www] http://www.darkshed.net/ [irc] ak|ra (#fluxbox at freenode.org)

>  If you're not allowed to open any window that's a problem that we
>  probably won't be able to get around. You have to have a window handle
>  (HWND) to access OpenGL. If it's just about
>  having an actual displayed window that should be possible by using an
>  FBOWindow for rendering, which is not actually visible anywhere.

i ve just recently used mesa3d on windows (osmesa) with opensg's
passivewindow to have absolutly no window at all for my 3d stuff.

works quite nice.

br, mathias
-- 
 [uid] mathias gumz [mail] akira at fluxbox dot org [pgp] 1024D/F6F6B18C
 [www] http://www.darkshed.net/ [irc] ak|ra (#fluxbox at freenode.org)

Hi Mathias,

Mathias Gumz wrote:
> 
> i ve just recently used mesa3d on windows (osmesa) with opensg's
> passivewindow to have absolutly no window at all for my 3d stuff.
> 
> works quite nice.

True, that's an option. The only disadvantage is that you lose hardware 
acceleration, and that limit the usefulness for some applications. ;)

But yes, that's an option.

Yours

	Dirk

>  True, that's an option. The only disadvantage is that you lose hardware
>  acceleration, and that limit the usefulness for some applications. ;)

well .. that depends :) osmesa suppoers the glsl just fine. and on a
recent quadcore each core rendering only a 4th of the "picture" ..
well, i am almost think that scales pretty well in a HUGE cluster :)
clustering graphic cards is a bit more tricky than just pure cpus.

another advantage is that you dont move memory around to access the
rgba / depth data. its just a uchar* right next to your code. so no
need to fbos or other complex stuff to fetch data back into main
memory.

but afterall it depends on the application.

cheers, mathias
-- 
 [uid] mathias gumz [mail] akira at fluxbox dot org [pgp] 1024D/F6F6B18C
 [www] http://www.darkshed.net/ [irc] ak|ra (#fluxbox at freenode.org)

Hello,

I tried to run OpenSG on Windows Server 2003 64bit. But some of
example application returned:
"WARNING:  Window::frameExit: Caught stray OpenGL error invalid
enumerant (0x500)" and nothing appears on the screen(black screen).


It is possible to run OpenSG on 64bit architecture?
Maybe i should recompile the source of OpenSG in VS2005 on 64bit machines?
Any suggestion?

-- 
Aleksander