[vtkusers] vtk iteration over actors to change entity parameters, how?

[Dr. A. M. Zsaki]

Hello,

I'm building my first 'real' application using VTK. I have a set of actors
and I would like to change their appearance after they have been created.
I'm using the FOX GUI as the user interface. Where I'm stuck at the moment
is that, say, I have three actors (0, 1, 2). I want to change the color of
the second one but so far I have not discovered any means of differentiating
actors from each other...

Is there a better way of doing this other than keeping track of which actor
is where in the list of actors (and when it was added,etc), like assigning a
name to an actor or something similar?!?


Any pointers are appreciated!

Attila


My code 'works' like this so far:

FXColorDialog* colordlg=new FXColorDialog(this,"Mesh color picker");

if(colordlg->execute()) {
    FXColor color=colordlg->getRGBA();
    int iRed=FXREDVAL(color);
    int iGreen=FXGREENVAL(color);
    int iBlue=FXBLUEVAL(color);
    vtkActorCollection* actors=vtkActorCollection::New();
    actors=ren->GetActors();
    actors->InitTraversal();
    int iNumberOfActors=actors->GetNumberOfItems();
    if (iNumberOfActors>0) {
        for (int i=0;i<iNumberOfActors;++i) {
            if (i==1) {
                vtkActor* actor=actors->GetNextActor();

actor->GetProperty()->SetColor((float)(iRed/256),(float)(iGreen/256),(float)
(iBlue/256));
                break;
            }
            actors->GetNextActor();
        }
    }
    actors->Delete();
}