[vtkusers] save a volume view as a MetaImage file

[Kevin H. Hobbs]

On Thursday 15 January 2009 06:55:32 Stéphane CALANDE wrote:
> Hi vtk users,
>
>
> I'm doing volume rendering but I would like to save a view into a MetaImage
> file.
>
> I don't know exactly which input I have to give to the meta image writer.
>
> Can you help me ?
>

It sounds like you are trying to save a 2D image of what you see on the 
screen. You need something like :

	// Renderer
	vtkRenderer * renderer = vtkRenderer::New();
	renderer->AddVolume( volume );

	// Render Window
	vtkRenderWindow * render_window = vtkRenderWindow::New();
	render_window->AddRenderer( renderer );

	// Window to Image	
	vtkWindowToImageFilter * win_2_image 
		= vtkWindowToImageFilter::New();
        win_2_image->SetInputBufferTypeToRGBA();
	win_2_image->SetInput( render_window );

	// PNG Writer
	vtkPNGWriter * writer = vtkPNGWriter::New();
	writer->SetFileName( out_file_name );
	writer->SetInputConnection( win_2_image->GetOutputPort() );

	render_window->Render();

	writer->Write();

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