[vtkusers] Grab function in VTk4 (vtkrenderer windows)

[Seema Jaisinghani]

use vtkWindowToImageFilter

--- Farshid Dehmeshki
<farshid.dehmeshki at medicsight.com> wrote:
> 
> Hi all;
> in one application in vtk version3*  I used Grab 
> function in the vtkRendererwindow class for capture
> the renderer windows.
> when I wanted to convert my codes to vtk4 I realized
> that this function does not exist anymore in this
> class.
> (the aim of this function was that capture the
> renderer windows and create a ppm file as output.)
> the grab function in 
> does any body know how can capture windows now (by
> vtk)  in the vtk 4+.


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