[vtkusers] renderer.GetActors() returning 3d actors, but not 2d actors.

[Greg Schussman]

Hi, David.

Thanks!  That worked perfectly.

Greg



On Fri, Sep 12, 2014 at 5:20 PM, David Gobbi <david.gobbi at gmail.com> wrote:

> Use GetViewProps() and use IsA() to check the type of each prop.
>
> On Fri, Sep 12, 2014 at 6:04 PM, Greg Schussman
> <greg.schussman at gmail.com> wrote:
> > Hi.
> >
> > I'm using python-2.6 and vtk-5.10.1.
> >
> > I have a renderer, to which I'm adding actors.  Some are 3d actors
> > (surfaces, sets of cones), and some are 2d actors (filename text,
> > scalarbar).  To add them, I'm calling:
> >
> >   self.renderer.AddActor(my_actor)  #  Also tried AddViewProp(my_actor)
> >
> > They seem to add in ok, and they do get rendered.
> >
> > However, based on user input, sometimes actors need to be removed and new
> > ones added.  So I need to take a look at what's already there, which I do
> > this way:
> >
> >   c = self.renderer.GetActors()
> >   c.InitTraversal()
> >   num_items = c.GetNumberOfItems()
> >   result = []
> >   for i in xrange(num_items):
> >       result.append(c.GetNextActor())
> >
> > I notice that when I add a 3d actor and I check before/adter, the
> num_items
> > increments as expected.
> >
> > However, when I add 2d actors (ScalarBar, Text), although they also
> render,
> > when I check before/after, the num_items does not increment, and they are
> > not returned in the GetActors() list.
> >
> > How do I find out which 2d actors are in the renderer, so that I can
> > optionally remove some of them?
> >
> > Should I be doing something different?
> >
> > Thanks.
> >
> > Greg
> >
> > p.s.  I've tried calling renderer.GetActors2D(), but then when i try to
> call
> > GetNextActor() on that, I get "AttributeError: GetNextActor".
>
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