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<DIV><FONT size=2>Hi, all,</FONT></DIV>
<DIV> </DIV>
<DIV><FONT size=2>I have a polydata pass through vtkDelaunay2D</FONT></DIV>
<DIV><FONT size=2></FONT> </DIV>
<DIV><FONT size=2>After that I use
vtkDelaunay2DGetOutput()->GetNumberOfCells() to query the number of
cells.</FONT></DIV>
<DIV><FONT size=2></FONT> </DIV>
<DIV><FONT size=2>The number is 0 which will cause the error of "no
data to contour" when vtkContourFilter applied.</FONT></DIV>
<DIV><FONT size=2></FONT> </DIV>
<DIV><FONT size=2>Why??</FONT></DIV>
<DIV><FONT size=2></FONT> </DIV>
<DIV><FONT size=2>Qin</FONT></DIV>
<DIV><FONT size=2></FONT> </DIV>
<DIV><FONT size=2></FONT> </DIV>
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