[vtkusers] subtract volume depending on the scalar values

[Andres Barrera]

you can define a function

vtkPiecewiseFunction * opacityTransferFunction    = 
vtkPiecewiseFunction::New();
          opacityTransferFunction->AddPoint(     0, 0.0 );
          opacityTransferFunction->AddPoint( 199, 0.0 );
          opacityTransferFunction->AddPoint( 200, 1.0 );
          opacityTransferFunction->AddPoint( 255, 1.0 );

and  then you only save 1s

   Andres


>From: "Jianlong Zhou" <zhou at isg.cs.uni-magdeburg.de>
>To: vtkusers at public.kitware.com
>Subject: [vtkusers] subtract volume depending on the scalar values
>Date: Tue, 13 May 2003 17:06:14 +0200
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>Hi, all,
>
>I want to extract a subvolume (sub-scalar range not sub-region range)
>depending on the scalar range, e.g. I want to extract a CT volume and only
>extract the scalar value between 200 and 255 and save the extracted
>volume data in this range in another raw file. Would anyone tell me how to
>do this?
>
>Thank you inadvance.
>
>Jianlong
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