<div dir="auto">Vtkpolyhedron uses mean value coordinates.</div><div class="gmail_extra"><br><div class="gmail_quote">On May 8, 2017 1:13 PM, "Kurt Sansom" <<a href="mailto:kayarre@gmail.com">kayarre@gmail.com</a>> wrote:<br type="attribution"><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr">Hi,<div>  Does anyone have suggestions to take cell derivatives from a  polyhedral/polytopal surface mesh because the VTK documentation says that, "<span style="color:rgb(0,0,0);font-family:roboto,sans-serif;font-size:14px">derivatives calculated for polygons with more than 4 vertices are inaccurate in most cases"</span></div><div><font color="#000000" face="roboto, sans-serif"><span style="font-size:14px"><br></span></font></div><div><font color="#000000" face="roboto, sans-serif"><span style="font-size:14px">from: <a href="http://www.vtk.org/doc/nightly/html/classvtkCellDerivatives.html#details" target="_blank">http://www.vtk.org/doc/<wbr>nightly/html/<wbr>classvtkCellDerivatives.html#<wbr>details</a></span></font></div><div><font color="#000000" face="roboto, sans-serif"><span style="font-size:14px"><br></span></font></div><div><font color="#000000" face="roboto, sans-serif"><span style="font-size:14px"><br></span></font></div><div><font color="#000000" face="roboto, sans-serif"><span style="font-size:14px">Regards, </span></font></div><div><font color="#000000" face="roboto, sans-serif"><span style="font-size:14px">~Kurt<br></span></font><div><div><br></div>-- <br><div class="m_4978611642611960298gmail_signature">Kurt Sansom<br></div>
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