[vtkusers] Freeing up memory

[rashedk]

Thanks Mike and Dominik. I didnt know smart pointers existed in VTK. I have
used them in ITK and they are great. Thanks again. 



Dominik Szczerba wrote:
> 
> I don't know why but why don't you use vtkSmartPointer's.
> - Dominik
> 
> rashed karim wrote:
>> Hi VTK users,
>> 
>> Inside a function I do this:
>> vtkRendererCollection* rendererCollection = renderWin->GetRenderers();
>> 
>> Where I am basically getting the renderers associated with a rendering
>> window. Further down in the code I extract the renderer from the
>> collection
>> and delete any existing actors in the renderer and replace it with a new
>> actor.
>> 
>> When exiting the function, I start freeing up the memory by invoking on
>> Delete( ) on the renderer, actor, etc. But here is where it gets all
>> wierd -
>> when I delete the rendererCollection object, I can no longer interact
>> with
>> my actor. Does anyone know why?
>> 
>> Thanks
>> Rashed Karim.
>> 
>> 
>> 
>> ------------------------------------------------------------------------
>> 
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> 
> -- 
> Dominik Szczerba, Ph.D.
> Computer Vision Lab CH-8092 Zurich
> http://www.vision.ee.ethz.ch/~domi
> _______________________________________________
> This is the private VTK discussion list. 
> Please keep messages on-topic. Check the FAQ at:
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> 

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