Hi marcus,
i tryied to make some experiment with the display calibration,
as you suggested, but i can't get on top of it.
Using the source files and some examples i've found,
i tried to run a simple cluster, with one client and
two servers. To set up the calibration i use this xml file:
<?xml version="1.0"?>
<displaycalibration>
<server name="test1">
<gamma> 0.5f </gamma>
</server>
<server name="test2">
</server>
</displaycalibration>
as you can see i try just to alter the gamma correction
of one of the servers, while the other remains unchanged.
I load this via:
std::filebuf fb;
fb.open ("test_due.xml",std::ios::in);
std::istream os(&fb);
mwin->loadCalibration(os);
//DisplayCalibrationPtr calibPtr = DisplayCalibration::create();
//
mwin->getCalibration()[0]->calibrate(mwin,(RenderAction*)mgr->getAction());
std::cout << "GAMMA1 " << mwin->getCalibration()[0]->getGamma() <<
std::endl;
fb.close();
and for what i can see the xml is correctly parsed. (the
Gamma corresponds).
The problem is that the corrisponding server window remains all black,
no matter what parameter i pass in it. Why? What's wrong?
I tried also a more direct approach with:
mwin->getCalibration()[0]->calibrate(mwin,(RenderAction*)mgr->getAction());
but it just segmentation faults (i admit i haven't experimented much
this second way).
Any suggestion? thanks Enrico
Il ven, 2005-05-13 alle 14:49, Marcus Roth ha scritto:
> Hi,
>
> it ist possible to render the contents of a cluster server into a
> texture and the do color correction and
> geometrical correction to this texture. This is done by the
> DisplayCalibration class.
>
> A clusterwindow has a multi field clusterCalibration. This field
> can hold references to a DisplayCalibration object. A display
> calibration can hold a grid that
> can be used to do distortion.
>
> Marcus
>
> Enrico Borrione wrote:
>
> >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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