[vtkusers] rotating vtkCamera

[Mark Wyszomierski]

Hi Marc,

Elevation seems to work - kind of. I keep calling elevate with the
amount of degrees I want to change by:

     for (int i = 0; i < 64; i++) {
        pCamera->Elevation(360.0 / 64.0);
     }

It works fine through about a 90 degree rotation - but then I start
getting debug error messages about the view up having to be
recalculated, and the volume starts spinning around out of control!

Thanks,
Mark

On 4/19/07, Marc Cotran <marc at cotran.ca> wrote:
> Hi there,
>
> Try vtkCamera::Elevation() and Azimuth() - both methods take an angle
> parameter. Sounds like you are looking for Elevation(). Pitch(), on the
> other hand, changes the focal point, not the camera position.
>
> hth
>
> Marc
>
>
> Mark Wyszomierski wrote:
> > Hi,
> >
> > Is there a method of vtkCamera to rotate about the focal point?
> > Something like:
> >
> > for (int i = 0; i < 64; i++) {
> >     double dPitch = i * (360.0 / 64);
> >     pCamera->Pitch(dPitch);
> >     // render..
> > }
> >
> > The effect I'm looking for is to have the camera orbit around its
> > focal point in the direction of its view up.
> >
> > Thanks,
> > Mark
> > _______________________________________________
> > This is the private VTK discussion list. Please keep messages
> > on-topic. Check the FAQ at: http://www.vtk.org/Wiki/VTK_FAQ
> > Follow this link to subscribe/unsubscribe:
> > http://www.vtk.org/mailman/listinfo/vtkusers
>
>