[vtkusers] Updating render

[Elvis Stansvik]

2018-03-03 6:52 GMT+01:00 Gib Bogle <g.bogle at auckland.ac.nz>:
> Hello,
>
>
> I have a simple QVTK program that draws a collection of cylinder actors (Qt
> 4.8.1, VTK 5.10).  The function that updates the actor positions is a Qt
> slot; on receiving a signal from another thread the function is invoked with
> the array of new positions.  Everything is working fine, except that the
> scene does not get updated unless I interact with it (move the mouse).  I
> don't understand what is needed to force the scene update.  I'm sure it must
> be something simple.
>
>
> Please enlighten me.

If you're using QVTKOpenGLWidget, I think a call to update() should be
enough (it's a Qt function).

If you're using the old and deprecated QVTKWidget, then I think a call
to GetRenderWindow()->Render() is what is needed.

Hope that helps.

Elvis

>
>
> Thanks
>
> Gib
>
>
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