Hi Dirk,
i am still struggling after the second viewpor problem.
As you may remember my final goal is to make it run on
my cluster, to simulate the geometric distortion of a
cilindrical screen and the ovaerlapping between the projections.
In order to achieve this objective, i was thinking about
adding the second viewport trick to my cluster servers,
so half of the application works as a slave of the client
(rendering its part of the scene), and half of the app
uses the obtained buffer to texture the target mesh and
obtaining my desired effect.
I did a little experiment of mixing two programs (the
render to texture and cluster server) but i can't get
but a crash after another. In a few words I create
a second viewport, add a TextureGrabBackground and
add all this to the main window of the server:
winid = glutCreateWindow(name);
window = GLUTWindow::create();
window->setId(winid);
window->init();
.
.
.
server = new ClusterServer(window,name,connectionType,"");
// start the server
server->start();
.
.
.
ViewportPtr vp2 = Viewport::create();
beginEditCP(vp2);
vp2->setCamera(cam);
vp2->setRoot(tr);
vp2->setBackground(tg);
vp2->setLeft(0);
vp2->setRight(1);
vp2->setBottom(0);
vp2->setTop(1);
endEditCP(vp2);
beginEditCP(window);
window->addPort(vp2);
endEditCP(window);
I noticed that the program crashes as soon as i add the second
viewport to the window.
Probably i am misunderstanding something crucial in the
rendering pipeline of OSG :)
Does anyone has some clue to offer?
Many thanks,
enrico
Il lun, 2005-05-09 alle 21:59, Dirk Reiners ha scritto:
> Hi Enrico,
>
> On Fri, 2005-05-06 at 10:54 +0200, Enrico Borrione wrote:
> > Hi dirk,
> > after playing with the example you pointed me for a bit,
> > i understood the basic principles...
> > Now I am trying to change the textured quad in the
> > second viewport with a simple geometry (as you suggested).
> > So... I modelled a half tube with blender,
> > exported it in wrml along with the texture coordinates
> > and tried to use it as the *screen* of the application.
> > Surprise surprise, it isn't working, i just see the
> > solid background. My best guess is that the matrixcameraptr
> > is pointing in the wrong direction, so i pointlessy looked for a
> > way to move the camera.
> > I used to query the simple scene manager for the navigator
> > and then update the projection matrix all by myself, but
> > in this case i think the navigator is linked to the first vieport...
>
> Yup.
>
> > So: how can i update the camera position of the second vp?
> > and the target of the look at? :)
>
> The easiest would probably be to create your own Camera and use that in
> the second viewport, which should work just fine.
>
> Dirk
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