[vtkusers] RemoveViewProp then AddViewProp of same actor changes results?

Ken Martin ken.martin at kitware.com
Thu Jan 19 16:59:09 EST 2017

It should be the same unless any of the actors are coincident or
translucent. In that case the order of the actors can make a difference.
alpha blending for transparency is order dependent and with coincident
geometry either first or last wins (I forget which in VTK). Not sure if
that applies in your example.

On Thu, Jan 19, 2017 at 4:54 PM, Sean McBride <sean at rogue-research.com>

> Hi all,
> I have a scene with various actors and everything draws and behaves
> correctly.  If I then simply remove and re-add an actor like so:
>         renderer->RemoveViewProp(actor);
>         renderer->AddViewProp(actor);
> then should I expect things to redraw exactly as they were?  I thought
> yes, but I have a case where the answer is no.  Here's a screenshot:
> <https://www.rogue-research.com/VTKRemoveAddBug.png>
> The left is correct and before the remove+add.  The right is after and
> incorrect.
> Is this expected? buggy?
> Thanks,
> --
> ____________________________________________________________
> Sean McBride, B. Eng                 sean at rogue-research.com
> Rogue Research                        www.rogue-research.com
> Mac Software Developer              Montréal, Québec, Canada
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Ken Martin PhD
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Kitware Inc.
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