[vtkusers] vtkActor for a lowerleft 3-axes object ?

[Malcolm Drummond]

Oops ...

OK, in the header file you'll find

  // Description:
  // Set/Get the camera to perform scaling and translation of the
  // vtkAxes2D.
  vtkSetObjectMacro(Renderer,vtkRenderer);
  vtkGetObjectMacro(Renderer,vtkRenderer);

So there's a SetRenderer method (with irrelevant and misleading comments)
which you'll have to call with a renderer prior to rendering. I think you
should take care of this immediately you've created the filter.

You might want to look later at using the viewport argument instead (as the
renderer is a subclass). I think that's where I was heading next. If it
actually runs and you think it's worth persuing I don't mind spending some
time on it, once I've finished with the tesselator stuff.

BTW Some disciplines prefer different labels, I know a lot of the
geo-sciences people like N.E and Down. It would make sense to offer user
defined labels

All the best
Malcolm

----- Original Message -----
From: "Sebastien Auclair" <sxa at fluent.com>
To: "Malcolm Drummond" <malcolm at geovision.co.za>
Sent: Tuesday, January 21, 2003 12:26 AM
Subject: Re: [vtkusers] vtkActor for a lowerleft 3-axes object ?


> I and thanks !
>
> I tried to instantiate your actor :
>  m_axes = vtkAxes2D::New(); // OR m_axes = new vtkAxes2D;  I tried both...
>  m_Renderer->AddActor(m_axes) ;
>
> It works fine until its "RenderOpaqueGeometry" function gets called.
> It's just that the Renderer is NULL... (vtkCamera *Camera =
> Renderer->GetActiveCamera();)
> How should it receive a value ?
>
> Thanks in advance !
>
> ----- Original Message -----
> From: "Malcolm Drummond" <malcolm at geovision.co.za>
> To: "vtkusers" <vtkusers at public.kitware.com>
> Sent: Monday, January 20, 2003 4:27 PM
> Subject: Re: [vtkusers] vtkActor for a lowerleft 3-axes object ?
>
>
> > Hi Sebastien
> >
> > As an approach, here's something that I used in a project a couple of
> years
> > ago. I just hacked the CubeAxesActor, some of the comments are just
> > left-over from that and don't make sense! It needs XYZ text added (it
was
> > required in a hurry so I just put in some static coloured text as a
legend
> > underneath). Also needs things like position2. The whole thing needs
> > re-doing properly - if I remember right it wobbled at certain camera
> > distances.
> >
> > Hope it's of some use
> > Malcolm
> >
> > ----- Original Message -----
> > From: "Sebastien Auclair" <sxa at fluent.com>
> > To: <vtkusers at public.kitware.com>
> > Sent: Monday, January 20, 2003 9:50 PM
> > Subject: [vtkusers] vtkActor for a lowerleft 3-axes object ?
> >
> >
> > > Hi !
> > >
> > > Someone told me that VTK was already offering an actor for displaying
a
> > > 3-axis icon on the lower left part of the rendering window. I can't
find
> > > anything that would do that. (See 3ds MAX or Autocad...etc)
> > >
> > > Is VTK providing such an actor ? If not, does someone knows how to do
> that
> > ?
> > > An example... (We can't be the first to want such a feature so...)
> > >
> > > It needs to correspond to the World coordinates.  It needs to be
> displayed
> > > on the lower left part of all viewports and it must always be visible
!
> > >
> > > Thanks in advance !
> > >
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> >
>
>