[vtkusers] how to avoid resize a sphere object when render window gets changed

[Oleksandr Malyushytsky]

First thing to understand is that geometry is not changed.  Sphere radius
remains the same.
Your camera does change according to viewport change . So visually you see
it different on the screen.

If you want object to appear always the same size on the screen you might
check:
https://www.vtk.org/Wiki/VTK/Examples/Cxx/Visualization/DistanceToCamera

It uses vtkDistanceToCamera to scaler the objects.



On Mon, Aug 6, 2018 at 7:05 AM, sergii shynkaruk <
sergii.shynkaruk at atracsys.com> wrote:

> Hello everyone!
> I've just recently started using VTK and in my project I need to keep a
> sphere unchanged. I tried this example -
> https://www.vtk.org/Wiki/VTK/Examples/Cxx/GeometricObjects/Sphere. But
> when
> I resize a window, my sphere automatically resizes as well.
>
>
> Or if I set radius = SetRaduis(10) or  SetRaduis(0.1), sphere appears with
> the same size, which I think is automatically adjusted with respect to main
> window size.
>
> Could you please suggest anything about it?
>
>
> Thanks in advance,
> Sergii
>
>
>
>
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