Hello Jie,
Jie Liu wrote:
> I would like to modify the camera settings of a SimpleSceneManager (SSM)
> object, in this way:
>
> MultiDisplayWindowPtr MDWndPtr = MultiDisplayWindow::create();* // a
> multi display window is involved*
> /* initialize multi display window
> ......
> */
>
> g_SceneManager = new SimpleSceneManager;
> g_SceneManager->setWindow(MDWndPtr);
> g_SceneManager->setRoot(g_SceneRoot);
>
> g_SceneManager->showAll();
>
> PerspectiveCameraPtr ptrCam = g_SceneManager->getCamera();
> beginEditCP(ptrCam);
> ptrCam->setFov(deg2rad(90));
> endEditCP(ptrCam);
> * g_SceneManager->setCamera(ptrCam);* // this line will cause a
> corruption of the heap
you don't need to set the camera again, since you are not replacing the
existing camera with a different one, but only change its parameters [1].
Incidentally this triggers a bug in the SSM, because setCamera does not
check against the new camera being the same as the old and at the end
has this sequence:
subRefCP(_camera);
_camera = newCamera;
addRefCP(_camera);
which kills the camera object if newCamera == _camera. I just committed
a fix for that.
Cheers,
Carsten
[1] in fact, setting the camera copies the beacon, near, far and fov
from the existing camera, so that is not what you want ;)
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