[vtkusers] Cut volume with freehand curve

[Bill Lorensen]

See my reply to your other question.

On Thu, Mar 29, 2012 at 6:27 PM, qwcbeyond <340181048 at qq.com> wrote:
> I found an  inefficient way  to work out it : let every voxel in volume use
> the vtkPolygon::PointInPolygon method  to check if it is in the polygon. But
> it seems very slow.
>
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