Hello Dirk,
Following your hints concerning my problem with thick black lines worked
immediatly, so I hoped this would be the case for this problem too;-)
Unfortunatly not. Perhaps you find find some time to have a quick look
on the following code. It is from the ClusterClient tutorial with my
additions. Execution result (with a wrl file as input) are two black
server windows, after the client connects to the two servers. The client
console shows no problems.
NodePtr scene=NullFC;
ChangeList::setReadWriteDefault();
osgInit(argc,argv);
int winid = setupGLUT(&argc, argv);
MultiDisplayWindowPtr mwin= MultiDisplayWindow::create();
beginEditCP(mwin);
// evaluate params, add servers.
// ...
MFViewportPtr* vps = mwin->getMFPort();
for (char c=0; c < vps->size(); c++) {
mwin->subPort(c);
}
endEditCP(mwin);
mgr = new SimpleSceneManager;
NodePtr rootnode = makeCoredNode<Group>();
PerspectiveCameraPtr camera = PerspectiveCamera::create();
vector<ViewportPtr> viewports;
vector<MatrixCameraDecoratorPtr> cameras;
for (char c=0; c<2; c++) {
ViewportPtr vp = Viewport::create();
MatrixCameraDecoratorPtr cam = MatrixCameraDecorator::create();
beginEditCP(cam);
cam->setDecoratee(camera);
endEditCP(cam);
beginEditCP(vp);
vp->setCamera(cam);
vp->setRoot(rootnode);
endEditCP(vp);
beginEditCP(mwin);
mwin->addPort(vp);
endEditCP(mwin);
viewports.push_back(vp);
cameras.push_back(cam);
}
beginEditCP(scene);
scene->setCore(osg::Transform::create());
endEditCP(scene);
NodePtr cam_beacon = osg::Node::create();
TransformPtr cam_trans = osg::Transform::create();
beginEditCP(cam_beacon);
cam_beacon->setCore(cam_trans);
endEditCP(cam_beacon);
beginEditCP(camera);
camera->setBeacon(cam_beacon);
endEditCP(camera);
beginEditCP(rootnode);
rootnode->addChild(cam_beacon);
rootnode->addChild(scene);
endEditCP(rootnode);
mgr->setWindow(mwin );
mgr->setRoot (rootnode);
mgr->showAll();
mwin->init();
glutMainLoop();
cheers,
thomas
Am Mittwoch, den 21.03.2007, 18:40 -0500 schrieb Dirk Reiners:
> Hi Thomas,
>
> Thomas Kulessa wrote:
> > Hi list,
> >
> > following mostly
> > http://www.mail-archive.com/[email protected]/msg05374.html
> > I try to set up a cluster with one client and six servers. I have 2
> > adjacent wall projections and 2x2 adjacent floor projections in front of
> > the wall. Something like 1/3 of a CAVE.
> > If I understand the above mentioned post right, one way to achieve it,
> > is to create 6 MatrixCameraDecorators and 6 Viewports, add one camera to
> > one viewport and finally add the six viewports to the
> > MultiDisplayWindow.
>
> Close. You need to add the camera to all the decorators, or they won't know
> what
> to do. And you need to remove the original viewport, or there will be some
> overlap.
>
> > Then I can manipulate the PostView matrices of each
> > Decorator and so the content of each server window.
>
> The alternative to using the MatrixDeco is to use the ProjectionCameraDeco,
> which knows a lot more about asymmetric viewing frustra and Caves. But if
> you're
> ok with calculating all the matrices yourself that's fine, too.
>
> > Unfortunatly this
> > doesn't work. The application behaves exactly as before with only one
> > viewport and one camera (besides a powered by OpenSG logo that somehow
> > appeared)
>
> That sounds like something basic is wrong.The logo only appears when you tell
> the SSM to show it.
>
> > , all windows/viewports are horizontally aligned.
> > Im also not sure if i understand the whole concept of Decorators,
>
> For a basic description see http://en.wikipedia.org/wiki/Decorator_pattern .
> The
> Decorator looks like a Camera (and can be added to a Viewport), and it uses
> another Camera underneath, but it changes the behavior somewhat.
>
> > 1. Do I need a beacon for each camera? Or just one? Or none? I mean,
> > whats the sense of the matrix decorator? Just for the easy access to the
> > matrices? Couldn't do the same with the beacons transform core?
>
> The main reason for the decorator is to be able to use the same camera for
> all
> the different views that you need. The idea is to have one Camera (and
> therefore
> one beacon), and insert a Decorator between it and the actual Viewport.
>
> > 2. How does the MultiDisplayWindow know, which server belongs to which
> > viewport? Simply by order?
>
> Yes.
>
> > Does it know how to transform the matrices in
> > the right way, when the Navigator changes position? (Since it is
> > associated with just one viewport and one beacon.)
>
> That's what the Decorators are for.
>
> Hope it helps
>
> Dirk
>
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