[vtkusers] vtkCamera::Elevation(...)

[Matthias Langer]

I'm a complete newbe in using the vtk library. So my question may be 
trivial ...
However: I use the c++ api of vtk-4.2.6. When trying to rotate a cone by 
somthing like

unsigned count = 0;
while(true)
{
     p_renderer->GetActiveCamera()->Elevation(1);
    ++count;
}

the image starts to flicker the moment count reaches 90.

Maybe anybody here in the list can explain me why ...

Thanks,
Matthias Langer