[vtkusers] question on memory + vtkactorcollection in c++

[Koning, P.J.H. de (LKEB)]

19-09-02 15:19:24, "Gopalakrishnan, Gowri" <Gowri.Gopalakrishnan at inteq.com> wrote:

The actor is still being referenced by the actor collection. If you call col->Delete() both the actor and the collection will be deleted, assuming you haven't attached the 
actor to a renderer.

vtkActor *myactor = vtkActor::New()
vtkActorCollection *col = vtkactorCollection::New()

col -> AddItem(myactor);

myactor -> Delete(); // this does not delete the actor, it just decreases the ref coun tfrom 2 to 1
col->Delete(); // Deletes both the actor and the actor collection

>
>
>  From:   "Gopalakrishnan, Gowri" <Gowri.Gopalakrishnan at inteq.com>
>
>  To:     "'vtkusers at public.kitware.com'" <vtkusers at public.kitware.com>
>  Subject:[vtkusers] question on memory + vtkactorcollection in c++
>  Date:   Thu, 19 Sep 2002 08:19:24 -0500
>
>
>
>  Hi In the following scenario
>   
>
>   
>
>  vtkActor *myactor = vtkActor::New()
>  vtkActorCollection *col = vtkactorCollection::New()
>
>  col -> AddItem(myactor);
>   
>
>  myactor -> Delete() // this deletes the  myactor (may be)
>
>   
>  I can do,
>
>   
>  Col -> GetItem()->GetProperty->SetColor() to change the color of the
>
>  original actor......This works....
>   
>
>  Does that mean myactor -> Delete() did not actually delete the actor since
>
>  its reference count is not zero....
>  So when will this actor be deleted?. When the reference goes to zero is it
>
>  automatically deleted?.
>   
>
>   
>
>  In addition before quitting the program if I do col->getActor()->Delete()
>  ....this crashes ( possibly correct behaviour since this was not created
>
>  with a new....)
>   
>
>  Can some one shed some light on this please.......
>   
>
>  Thanks a lot
>
>   
>  Regards
>
>  Gowri
>   
>
>   
>
>   
>