[vtkusers] create and delete vtkActor and vtk3DWidget

[Thales Luis Rodrigues Sabino]

The way I'm doing things is just to remove the actors from the renderer.
Since I'm sure my program doesn't hold any other reference, I do trust that
the vtkSmartPointer is doing its job.

On Thu, Feb 25, 2016 at 5:51 PM, Weiguang guan <guanw at rhpcs.mcmaster.ca>
wrote:

> Hello,
>
> In my program (C++), a user can create/remove an object (cone, cylinder,
> ...) or a widget (vtkBoxWidget, ...). What's the right way of doing so
> without causing memory leaking or trashing?
>
> In "Examples/Tutorial/Step6/Cxx/Cone6.cxx", I see the last section of code
> doing clean-up at the end as follows:
>  170   cone->Delete();
>  171   coneMapper->Delete();
>  172   coneActor->Delete();
>  173   callback->Delete();
>  174   boxWidget->Delete();
>  175   ren1->Delete();
>  176   renWin->Delete();
>  177   iren->Delete();
>  178   style->Delete();
> when it exits.
>
> Lines 170-172 won't delete coneActor because ren1 still use it 99
> ren1->AddActor( coneActor ). This example works fine as it delete ren1,
> renWin, and iren as well at exit point. Shall I do
> ren1-RemoveActor(coneActor) in addtion to coneActor->Delete()? I just want
> to "undo" the creation as if cone had never been created.
>
> How about the widget boxWidget? It may be trickier. In addition to
> boxWidget->Delete(), do I need to do something like
> boxWidget->SetInteractor(NULL);
> boxWidget->UnRegister(iren);
> ?
>
> Weiguang
>
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-- 
Thales Luis Rodrigues Sabino

PhD Student at PGMC-UFJF <http://www.ufjf.br/pgmc/>
Lattes <http://lattes.cnpq.br/0601030410417146> | LinkedIn
<https://br.linkedin.com/in/tluisrs> | ResearchGate
<https://www.researchgate.net/profile/Thales_Luis_Sabino>
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