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<DIV><FONT face=Arial size=2><FONT face=arial size=2>Hi VTK
users,</FONT><BR> <BR><FONT face=arial size=2>I am working with
<STRONG>QUADRATIC </STRONG>cells (2D/3D) in unstructured grids and require a
view of all the cell edges on the bounding surface only. Using vtkGeometryFilter
gives an access violation - linear cells are fine.</FONT></FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2><FONT face=arial
size=2><B>vtkGeometryFilter</B>.cxx (revision 1.91) - about line 902 in
UnstructuredGridExecute() : </FONT></FONT><FONT face=Arial size=2><FONT
face=arial size=2>newCellId = Lines->InsertNextCell(2) should read <FONT
face=Arial size=2><FONT face=arial size=2>newCellId =
Polys->InsertNextCell(3). Same cut/paste mistake at about line 921.
</FONT></FONT></FONT></FONT></DIV>
<DIV><FONT face=Arial size=2><FONT face=arial size=2></FONT></FONT> </DIV>
<DIV><FONT face=Arial size=2><FONT face=arial size=2>Extracting the edges
using vtkFeatureEdges shows all the edges of the graphics primitives used
in triangulating the quadratic faces in addition to the original cell edges.
While vtkExtractEdges does not show the triangulation results, I am not aware of
how to extract only the surface edges. Has anybody got any
suggestions?</FONT></FONT></DIV>
<DIV><FONT face=Arial size=2><FONT face=arial size=2></FONT></FONT> </DIV>
<DIV><FONT face=Arial size=2><FONT face=arial size=2>Many thanks in
advance.</FONT></FONT></DIV>
<DIV><FONT face=Arial size=2><FONT face=arial size=2></FONT></FONT> </DIV>
<DIV><FONT face=Arial size=2><FONT face=arial size=2>PS thanks to Will Schroeder
for the very timely source updates.</FONT></FONT></DIV></BODY></HTML>