[vtkusers] How to get length of contour in vtkContourWidget ?

沧海一粟 liyihai2009 at qq.com
Mon Jun 8 22:24:46 EDT 2015

I used vtkContourWidget to draw a contour, and tried to get length of it. I noticed that vtkSplineWidget has a public member function GetSummedLength (), but vtkContourWidget doesn't. How can I achieve this goal(get the length of contour)?
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