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<p class=MsoNormal><font size=3 color="#003366" face=新細明體><span lang=EN-US
style='font-size:12.0pt'>There is vtkHull filter for Convex hull shrinking of
Polydata, already,<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=3 color="#003366" face=新細明體><span lang=EN-US
style='font-size:12.0pt'>Is there a shrinking wrap filter of polydata, which
act as Shrinking film to wrap up the polydata, that is a non-convex hull
wrapper needed.<o:p></o:p></span></font></p>
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