Hello,
I found a Mail from the 09.May.2006 where Marcus Roth answers to a question
posted by Chuck Bueche.
I am developing quite the same as Chuck did.
I implemented my own framework for initializing the cluster environment and
successfully tested it
with the stereo example that can be found in the related pages in the api
documentation.
It even worked with mouse navigation.
Now I followed Marcus's description of what needs to be done in order to set up
different projection planes.
Marcus answered Chuck:
The MultiDisplayWindow is the right Window to use even for a Cave.
If you have e.g. 10 projectors, then place 10 viewports into the
MultiDisplayWindow
xxxxxxxxxx
If you have a resolution of 1280x1024 for your projectors, Set the size of the
MultDisplayWindow to 12800 x 1024.
First Viewport goes form 0,0 - 1279,1023. second from 1280,0 - 2559,1024 , ...
You can adjust the viewports so that they overlap with your projection area.
Assign a root to all viewports.
Assign a different ProjectionCameraDecorator to all viewports and configure the
projection plane
Assign your camera to all Decorators.
I think I followed the description and replacing the type of the
ShearedStereoCameraDecorator by
a ProjectionCameraDecorator and then setting up the projection surface had been
almost everything I did.
But after that my running application crashes with a segmentation fault the
moment all three windows appear and the first draw is attempted.
Setting H and V servers or not does not change anything just as leaving the
setNear, setFar, setFov for the Camera.
Setting the Viewports size to relative or absolute values doesn't change a
thing.
Every single object is initialized, none of the objects points to NullFC, I
know that for sure.
Does someone of you know what I need to do to get rid of the seg-fault and get
properly rendered perspectives?
I am grateful for any hint you might have.
Thanks in advance
Lennart
--------------------------------------
Here is what I do:
beginEditCP(m_clientCamera);
{
m_clientCamera->setBeacon(m_client_beacon);
m_clientCamera->setFov(deg2rad(90));
m_clientCamera->setNear(0.1);
m_clientCamera->setFar(100);
}
endEditCP(m_clientCamera);
SolidBackgroundPtr bkg = SolidBackground::create();
beginEditCP(bkg);
{
bkg->setColor(Color3f(0,0,0));
}
endEditCP(bkg);
ViewportPtr leftViewport = Viewport::create();
ViewportPtr rightViewport = Viewport::create();
ProjectionCameraDecoratorPtr cameraDecorator =
ProjectionCameraDecorator::create();
beginEditCP(cameraDecorator);
{
cameraDecorator->setLeftEye(true);
cameraDecorator->setEyeSeparation(0.06);
cameraDecorator->setDecoratee(m_clientCamera);
cameraDecorator->getSurface ().push_back (Pnt3f ( 1.f, 1.f,-1.f));
cameraDecorator->getSurface ().push_back (Pnt3f (-1.f, 1.f,-1.f));
cameraDecorator->getSurface ().push_back (Pnt3f (-1.f,-1.f,-1.f));
cameraDecorator->getSurface ().push_back (Pnt3f ( 1.f,-1.f,-1.f));
beginEditCP(leftViewport);
{
leftViewport->setCamera (cameraDecorator);
leftViewport->setBackground(bkg);
leftViewport->setRoot (m_root);
leftViewport->setSize (0,0,639,639);
}
endEditCP(leftViewport);
}
endEditCP(cameraDecorator);
cameraDecorator = ProjectionCameraDecorator::create();
beginEditCP(cameraDecorator);
{
cameraDecorator->setLeftEye(false);
cameraDecorator->setEyeSeparation(0.06);
cameraDecorator->setDecoratee(m_clientCamera);
cameraDecorator->getSurface ().push_back (Pnt3f ( 1.f,-1.f,-1.f));
cameraDecorator->getSurface ().push_back (Pnt3f (-1.f,-1.f,-1.f));
cameraDecorator->getSurface ().push_back (Pnt3f (-1.f,-1.f, 1.f));
cameraDecorator->getSurface ().push_back (Pnt3f ( 1.f,-1.f, 1.f));
beginEditCP(rightViewport);
{
rightViewport->setCamera (cameraDecorator);
rightViewport->setBackground(bkg);
rightViewport->setRoot (m_root);
rightViewport->setSize (640,0,1279,639);
}
endEditCP(rightViewport);
}
endEditCP(cameraDecorator);
beginEditCP(m_clusterWin);
{
m_clusterWin->setConnectionType("Multicast");
m_clusterWin->getServers().push_back("Server1");
m_clusterWin->getServers().push_back("Server2");
m_clusterWin->setSize (1280,640);
m_clusterWin->addPort(leftViewport);
m_clusterWin->addPort(rightViewport);
m_clusterWin->init();
}
endEditCP(m_clusterWin);
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