Hi Robert,
>What do you mean by "doesn't help"? >By default View's are constructed
>without a CameraManipulator so normally one would not need to do a
>view->setCameraManipulator(0);
I'm directly modifying the compositeview example in OSG page and I only modify
the "view two" code portion to discard the manipulator, as per your statement
there is not even supposed to be manipulator at all. But in my case trackball
is still operating even after I call "view->setCameraManipulator(NULL);" "
view->setCameraManipulator(0);"consecutively and has drastical effects in ortho
view.
Code portion :// view two { osgViewer::View* view = new
osgViewer::View; view->setName("View two");
viewer.addView(view);
view->setSceneData( rootnode );
view->getCamera()->setName("Cam two");
view->getCamera()->setViewport(new osg::Viewport(traits->width/2,0,
traits->width/2, traits->height/2));
view->getCamera()->setGraphicsContext(gc.get());
view->getCamera()->setProjectionMatrixAsOrtho2D(-50,50,-50,50);
view->setCameraManipulator(NULL);
view->setCameraManipulator(0); view->addEventHandler(new
PickHandler()); }
Regards,
Date: Sat, 19 Jul 2014 10:44:23 +0100
From: [email protected]
To: [email protected]
Subject: Re: [osg-users] Disabling cameramanipulator in CompositeViewer
Hi Sonya,
On 19 July 2014 09:16, Sonya Blade <[email protected]> wrote:
Dear All,I need to switch off the camera manipulator in one of the views in
composite viewer. Setting the view->setCameraManipulator(NULL); doesn't work
in my case, setting camera
manipulator to the 0 value doesn't help also.
What do you mean by "doesn't help"?
If there is no CameraManipulator assigned to a View then View's Camera's
ViewMatrix will be left alone completely and will be up to your application to
update directly. By default View's are constructed without a CameraManipulator
so normally one would not need to do a view->setCameraManipulator(0);
Furthermore, having calling the
view->getCamera()->setProjectionMatrixAsOrtho2D(-newx,newx,-newy,newy);
in each scrolling doesn't cause any wreak havoc or any performance penalty,
right?
It's very lightweight to update Camera's View and Projection matrix on each
frame, there is essentially negligible cost.
The only thing I'd add is that normally one doesn't implementing panning of
view by updating the projection matrix, but by updating the view matrix.
Robert.
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