Hello there.
After testing, I'm starting to get confused. This is what I do now before
calling run:
osgGA::TrackballManipulator *manipulator = new
osgGA::TrackballManipulator();
manipulator->setCenter(osg::Vec3f(10.0, 10.0, 0.0));
manipulator->setDistance(50.0);
viewer.setCameraManipulator(manipulator);
viewer.run();
But no matter what value I set to center or distance the starting
transformation is the same. I've been looking about in the sources, can't
find the reason why the trackball manipulator isn't responding to my
settings. I'm thinking that either the viewer resets the manipulator values
or the center and distance doesn't work like I have pressumed.
It'd be nice to have the trackball manipulator working, but to be able to
set it's starting whereabouts.
/Peter
On 2007-07-28 (Sat) 22:08, Robert Osfield wrote:
> Hi Peter,
>
> I presume what you are up against is the use of a Camera Manipulator
> that is setting the viewer's Camera's View Matrix on each frame.
>
> If you don't want the standard manipulator then don't register one,
> and instead set the view matrix on each frame i.e
>
> viewer.realize();
> while(!viewer.done())
> {
> osg::Matrixd myViewMatrix = ....; // compute in some way.
> viewer.getCamera()->setViewMatrix(myViewMatrx);
> viewer.frame();
> }
>
> Or alternatively you could just set the home position of the camera
> manipulator.
>
> Robert.
>
> On 7/28/07, Peter Gebauer <[EMAIL PROTECTED]> wrote:
> > Hi all!
> >
> > I've found the Viewer very useful in creating quick, browsable scenegraphs,
> > but I've hit a problem.
> >
> > The viewer camera always translates and rotates to fit the entire
> > scenegraph at startup. This is a problem when I want to start with more
> > distance or slightly skewed angles. The result is that all my transforms
> > are "nullified" by the camera compensating for it when starting.
> >
> > I can move about the scenegraph using the default controls, that's not a
> > problem, the problem is only that the starting scenegraph render is not what
> > I want or what my manual scenegraph transforms should produce.
> >
> > Is there any way to get the default camera of the viewer and disable this
> > automatic transform? Maybe I can do it directly on the viewer instance?
> >
> > /Peter
> > _______________________________________________
> > osg-users mailing list
> > [email protected]
> > http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
> >
> _______________________________________________
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>
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