<DIV>HI, All</DIV> <DIV> I have a problem,when I used vtkPolyData as the data structure to draw a triangle or a polygon in the window , the triangle or polygon was filled,but what i want was not a plane , just its boundry. what should i do? draw the line one by one?</DIV> <DIV> </DIV> <DIV>thank you all</DIV><p> 
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