[vtkusers] RenderLargeImage multiple times

[Christian Poecher]

Hi,

I would like to add a "Save Image in High Res" button to my
appliacation. Therefore
I used the class vtkRenderLargeImage in conjuction with vtkBMPWriter.
The
code is nearly identical to the example in
contrib\examplesTcl\largeImage.tcl:

vtkRenderLargeImage renderLarge
vtkBMPWriter writer

proc snapshot {renWin} {
    set types { { {Images BMP} {.bmp} } }
    set fileSnap [tk_getSaveFile -title "Save Snapshot" -filetypes
$types]

    renderLarge SetInput ren1
    renderLarge SetMagnification 2
    renderLarge Update 
    writer SetInput [renderLarge GetOutput]
    writer SetFileName $fileSnap
    writer Write
    $renWin Render 
}

But if I move the object I display a little bit and press on "Save" and
trigger the procedure again, the _old_ image is written again. So it
looks like
there is an update problem.
Can anybody tell me why?

Another inconveniece: If I have something over the visualization window
(e.g. the window with the GUI-Controls), the image shows those
overlapping
windows. This behaviour has already been posted by several individuals
before me.
Is there a solution for this problem by now?

chris

-- 
________________________________________________________________________
Christian Poecher                      mailto:poecher at icom-consulting.de
ICOM GmbH   					Phone: +49 241 9367-1554
Schloss-Rahe-Str. 15, 52072 Aachen, Germany     Fax  : +49 241 9367-1589
________________________________________________________________________