[vtkusers] Help with vtkWindowToImageFilter

[Berk Geveci]

The input to the filter is the render window not it's output
(which does not exist). Using 
  w2if->SetInput(renWin);
instead of
  w2if->SetInput(renWin->GetOutput());
should fix your problem.

-Berk

On Fri, 2002-04-26 at 15:51, Michael Györffy wrote:
> Hello:
> 	I'm a new user and am trying to save images from generated
> PolyData.
> Through the excellent help I've received from this forum (Thank you) I'm
> trying to take the screenshot and convert it to ImageData using
> vtkWindowToImageFilter.
> 	 I get an error of:"no matching function for call
> to
> `vtkRenderWindow::GetOutput ()'".
> 	I don't understand why this doesn't work, but works in examples
> such as OffScreenCone.tcl.
> 
> 	Briefly, the layout of my program is:
> 		PolyDataReader
> 		PolyDataMapper
> 		Actor
> 		Renderer
> 		Renderwindow
> then I use the following:
> 	vtkWindowToImageFilter *w2if = vtkWindowToImageFilter::New();
>   		w2if->SetInput(renWin->GetOutput());
> 
> 	vtkPNMWriter *pnmwriter=vtkPNMWriter::New();
>   		pnmwriter->SetInput(w2if->GetOutput());
> 		pnmwriter->SetFileName("3Dimagedata.pnm");
>   		pnmwriter->Write();
> 	Any suggestions would be very much appreciated.
> Thanks,
> 
> Mike
> 
> 
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