<table cellspacing="0" cellpadding="0" border="0" ><tr><td valign="top" style="font: inherit;"><DIV>Hi, there,</DIV>
<DIV> </DIV>
<DIV>I would like to display arrows on a closed surface mesh. Given that the the arrows may point inside and outside the surface, I can see the arrows pointing outside the surface using vtkGlyph3D and vtkArrowSource. However, the arrows pointing inside is not visable. How can I pull out the arrows pointing inside?</DIV>
<DIV> </DIV>
<DIV>Is there any function by which I can chang the role between the start point and end point of an arrow?</DIV>
<DIV>or How can I manage to solve the problem? Is there any other way?</DIV>
<DIV> </DIV>
<DIV>Thanks a lot!</DIV>
<DIV> </DIV>
<DIV>yuanchao </DIV></td></tr></table><br>
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