Hi all,
I have a problem with changing viewports. The aim is to turn a stereo
modus or mono modus each time user has pressed a specified key.
In this way I try to turn stereo modus on:
----------------------------------------------------------------------
ViewportPtr vpleft,vpright;
ViewportPtr vp;
PerspectiveCameraPtr cam;
vp = pwin->getPort(0);
cam = PerspectiveCameraPtr::dcast(vp->getCamera());
// decorators
decoleft = ShearedStereoCameraDecorator::create();
decoright = ShearedStereoCameraDecorator::create();
beginEditCP(decoleft);
decoleft->setEyeSeparation(ed);
decoleft->setZeroParallaxDistance(zpp);
decoleft->setLeftEye(true); decoleft->setDecoratee(cam); endEditCP
(decoleft);
beginEditCP(decoright);
decoright->setEyeSeparation(ed);
decoright->setZeroParallaxDistance(zpp);
decoright->setLeftEye(false); decoright->setDecoratee(cam);
endEditCP (decoright);
// viewports
vpleft = vp;
vpright = Viewport::create();
beginEditCP(vpleft);
vpleft->setCamera(decoleft);
vpleft->setLeft(0);
vpleft->setRight(0.5);
vpleft->setBottom(0);
vpleft->setTop(1);
endEditCP (vpleft);
beginEditCP(vpright);
vpright->setCamera(decoright);
vpright->setLeft(0.5);
vpright->setRight(1);
vpright->setBottom(0);
vpright->setTop(1);
vpright->setBackground(vp->getBackground());
vpright->setRoot(vp->getRoot());
endEditCP (vpright);
// sub / add viewports
beginEditCP(pwin); pwin->subPort(vp); pwin->addPort(vpleft);
pwin->addPort(vpright); endEditCP (pwin); // make it notice the
changes
mgr->setWindow(pwin );
// show the whole scene
mgr->showAll();
----------------------------------------------------------------------
And in this way I try to turn on mono modus:
----------------------------------------------------------------------
vpleft = pwin->getPort(0);
vpright = pwin->getPort(1);
beginEditCP(vpleft);
vpleft->setLeft(0);
vpleft->setRight(1);
vpleft->setBottom(0);
vpleft->setTop(1);
endEditCP (vpleft);
beginEditCP(pwin); pwin->subPort(vpright);
endEditCP(pwin); // make it notice the changes
mgr->setWindow(pwin );
// show the whole scene
mgr->showAll();
----------------------------------------------------------------------
But it works only one time: start the program, turn to stereo modus,
turn to mono modus and than I get following message:
"Unhandled exception at 0x014fa44c in 01hello.exe: 0xC0000005: Access
violation reading location 0x00000000."
And after clicking on "break":
"There is no source code available for the current location."
Is there something important that have been done by changing viewports?
---
Sergej
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