[vtkusers] Add ID to vtkImageActor

[Mathieu Coursolle]

Hi,

If I understand correctly, you are trying to easily retrieve a  
vtkActor instance based on some key.
I usually use a map where the key is a unique ID, and the value the  
actual vtkActor.
That way I can retrieve quickly the actor associated with a key.  
However, this has the inconvenient
of maintaining that map to make sure you remove actors which are  
deleted, and add newly created
actors.

Hope this helps,

Mathieu

____________________
Mathieu Coursolle, M.Ing.		
Rogue Research Inc.
www.rogue-research.com

On 6-Mar-09, at 11:02 AM, John Eke wrote:

> What I am trying to do is add a string Id as a private member to a  
> vtkImageActor. I have a scenario where I am inserting multiple  
> vtkImageActors into a renderer... and I want to selectively enable  
> and disable them. The only way I can forsee doing that is if each  
> image actor had an ID. That way I can iterate through the actors,  
> find the one with the ID I am looking for, then enable it.
>
> Is there a better way to do this? If not how can I add the ID field  
> to an image actor?
>
> I hope this clears things up
>
> - John
>
> Mathieu Malaterre wrote:
>>
>> On Fri, Mar 6, 2009 at 4:39 PM, John Eke <johne at annidis.com> wrote:
>>
>>> Hi Guys,
>>>
>>> Whats the easiest way to get a vtkImageActor with an ID field? I  
>>> tried
>>> inheritance, didn't work (maybe I didn't do it right). I tried  
>>> creating a
>>> replica of vtkImageActor, and renaming it to something else. But  
>>> with this,
>>> the New() method returns NULL
>>>
>> I did not quite followed what you are trying to do, but you  
>> understand
>> that vtkImageActor::New() returns a vtkOpenGLImageActor ?
>>
>> 2cts
>>
>
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