[vtkusers] layered renderers

[CLEMENTS, ROBERT]

I may have figured this out.  Try setting the interactorstyle on your render window with something similar to the following.  If i comment out the last 3 lines only 1 of my layers interacts.  See if that helps


set iact [[$renderWidget  GetRenderWindow] GetInteractor] 
set renWin2 [$renderWidget GetRenderWindow] 
vtkInteractorStyleTrackballCamera style
$iact SetInteractorStyle style 
$iact SetRenderWindow $renWin2 
$iact SetDesiredUpdateRate 0
 

Rob 


I tried precisely that. Without success.
Maybe there is some detail I overlooked.
DO you have any example-code ?

Kind regards,
oliver

2008/4/9, CLEMENTS, ROBERT <rclement at kent.edu>:
>
>  I to have had similar problems but  it seems that using something similar
> to below;
>
> ren4 SetActiveCamera [ren2 GetActiveCamera]
>
> makes both layers react to the same input.  Hope this helps .
>
> Rob
>
>
> Hello Steve,
> I am glad someone else has the same problems to solve ;)
> However, I fear you are right : The books do not contain any
> documentation on this. I even searched the archives without success.
> There is only one rudimentary CPP example.
> Anyway, I will try to do the same as you are doing and
> work myself through it. So maybe we can help each other out ?
>
> Kind regards,
> Oliver
>
> 2008/4/8, Steve Chall <stevec at renci.org>:
> >
> >
> > >Message: 18
> > >Date: Tue, 8 Apr 2008 14:12:32 +0200
> > >From: "Oliver Kania" <ptw.freiburg at googlemail.com>
> > >Subject: [vtkusers] Multiple rendering layers reacting to interaction
> > >To: vtkusers at vtk.org
> > >Message-ID:
> > >       <e22fb1100804080512q2b1ad655oee6f3581183bfb60 at mail.gmail.com>
> > >Content-Type: text/plain; charset="iso-8859-1"
> > >
> > >Hello,
> > >my application has several layers :
> > >
> > >vtkRenderer RenderImage2 = new vtkRenderer();
> > >vtkRenderer RenderImage = new vtkRenderer();
> > >
> > > RenderImage.SetLayer(0);
> > > RenderImage2.SetLayer(1);
> > >
> > > RenderImage.SetInteractive(1);
> > > RenderImage2.SetInteractive(1);
> > >
> > >
> > >  RenderImage.SetBackground(0.0, 0.0, 0.3);
> > >
> > >  vtkRenderWindow renWin = new vtkRenderWindow();
> > >  renWin.SetNumberOfLayers(2);
> > >  renWin.AddRenderer(RenderImage2);
> > >  renWin.AddRenderer(RenderImage);
> > >
> > >vtkRenderWindowInteractor iren = new vtkRenderWindowInteractor();
> > >iren.SetRenderWindow(renWin);
> > >//set image mode interaction style
> > >vtkInteractorStyleImage interactor = new vtkInteractorStyleImage();
> > >ren.SetInteractorStyle(interactor);
> > >
> > >What I find is that only one layer reacts to interaction.
> > >Since I used SetInteractive(), I was expecting that both layers do
> react.
> > >More generally, I want to have an arbitrary number of layers that do
> > >react to the same interaction. Maybe it is somehow possible to link
> > >the cameras of the renderers ?
> > >(I tried Renderer1.setCamera(Renderer2.getCamera()) but that does
> > >not work)
> > >
> > >kind regards,
> > >Oliver
> >
> > Thank you, Oliver, for bringing layered rendering to my attention.  This
> > sounds like it could resolve some visibility issues I'm experiencing.
> > However, I can't seem to find very much documentation on this
> > feature.  I've
> > bought and looked through the books, read the code in vtkRenderer.h, and
> > checked online, and pretty much all I've found out is that layers are
> > numbered and all but the bottom are transparent.  I can and, if
> necessary,
> > will work through it empirically, i.e., by writing code and seeing what
> > happens.  But it would be valuable and probably much more efficient if
> > there
> > were some more thorough documentation than what I've found thus far.
> Can
> > anyone point me to it?  Admittedly, once again I may have just
> overlooked
> > something obvious, but if so I'd appreciate someone shaking me out of my
> > tunnel vision.  Thanks all.
> >
> > -Steve
> >
> >
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>
>

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