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<DIV><SPAN class=921033709-08022007><FONT face=Arial color=#0000ff>Yes, but
those filters give me ALL the edges in one group..</FONT></SPAN></DIV>
<DIV><SPAN class=921033709-08022007><FONT face=Arial color=#0000ff>I am looking
for a way to separate them to say, 4 edges, in the quad
case.</FONT></SPAN></DIV>
<DIV><SPAN class=921033709-08022007><FONT face=Arial
color=#0000ff>Gil</FONT></SPAN></DIV>
<BLOCKQUOTE dir=ltr style="MARGIN-RIGHT: 0px">
<DIV class=OutlookMessageHeader dir=ltr align=left><FONT
face=Tahoma>-----Original Message-----<BR><B>From:</B> John Platt
[mailto:jcplatt@dsl.pipex.com]<BR><B>Sent:</B> Thursday, February 08, 2007
11:02 AM<BR><B>To:</B> 'Gil'<BR><B>Cc:</B> vtkusers@vtk.org<BR><B>Subject:</B>
RE: [vtkusers] Extracting edge regions of a surface<BR><BR></FONT></DIV>
<DIV class=Section1>
<P class=MsoNormal><FONT face=Arial color=navy><SPAN
style="FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: Arial">Have you looked at
vtkExtractEdges or vtkFeatureEdges?</SPAN></FONT></P>
<P class=MsoNormal><FONT face=Arial color=navy><SPAN
style="FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: Arial"></SPAN></FONT> </P>
<P class=MsoNormal><FONT face=Arial color=navy><SPAN
style="FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: Arial">John.</SPAN></FONT></P>
<P class=MsoNormal><FONT face=Arial color=navy><SPAN
style="FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: Arial"></SPAN></FONT> </P>
<P class=MsoNormal style="MARGIN-LEFT: 36pt"><FONT face=Tahoma><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Tahoma">-----Original
Message-----<BR><B><SPAN style="FONT-WEIGHT: bold">From:</SPAN></B>
vtkusers-bounces+jcplatt=dsl.pipex.com@vtk.org
[mailto:vtkusers-bounces+jcplatt=dsl.pipex.com@vtk.org] <B><SPAN
style="FONT-WEIGHT: bold">On Behalf Of </SPAN></B>Gil<BR><B><SPAN
style="FONT-WEIGHT: bold">Sent:</SPAN></B> 08 February 2007 08:06<BR><B><SPAN
style="FONT-WEIGHT: bold">To:</SPAN></B> vtkusers<BR><B><SPAN
style="FONT-WEIGHT: bold">Subject:</SPAN></B> [vtkusers] Extracting edge
regions of a surface</SPAN></FONT></P>
<P class=MsoNormal style="MARGIN-LEFT: 36pt"><FONT
face="Times New Roman"><SPAN style="FONT-SIZE: 12pt"></SPAN></FONT> </P>
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<P class=MsoNormal style="MARGIN-LEFT: 36pt"><FONT face=Arial><SPAN
style="FONT-SIZE: 12pt; FONT-FAMILY: Arial">Hi,</SPAN></FONT></P></DIV>
<DIV>
<P class=MsoNormal style="MARGIN-LEFT: 36pt"><FONT face=Arial><SPAN
style="FONT-SIZE: 12pt; FONT-FAMILY: Arial">To extract faces of a volume I do
the following:</SPAN></FONT></P></DIV>
<DIV>
<P class=MsoNormal style="MARGIN-LEFT: 36pt"><FONT face=Arial><SPAN
style="FONT-SIZE: 12pt; FONT-FAMILY: Arial">vtkDataSetSurfaceFilter ->
vtkPolyDataNormals -> vtkConnectivityFilter(for each
region).</SPAN></FONT></P></DIV>
<DIV>
<P class=MsoNormal style="MARGIN-LEFT: 36pt"><FONT
face="Times New Roman"><SPAN
style="FONT-SIZE: 12pt"></SPAN></FONT> </P></DIV>
<DIV>
<P class=MsoNormal style="MARGIN-LEFT: 36pt"><FONT face=Arial><SPAN
style="FONT-SIZE: 12pt; FONT-FAMILY: Arial">Is there a way to do it for
surfaces - extract each edges as a region? (i.e. for a quad - extract 4
different edges).</SPAN></FONT></P></DIV>
<DIV>
<P class=MsoNormal style="MARGIN-LEFT: 36pt"><FONT
face="Times New Roman"><SPAN
style="FONT-SIZE: 12pt"></SPAN></FONT> </P></DIV>
<DIV>
<P class=MsoNormal style="MARGIN-LEFT: 36pt"><FONT face=Arial><SPAN
style="FONT-SIZE: 12pt; FONT-FAMILY: Arial">Thanks,</SPAN></FONT></P></DIV>
<DIV>
<P class=MsoNormal style="MARGIN-LEFT: 36pt"><FONT face=Arial><SPAN
style="FONT-SIZE: 12pt; FONT-FAMILY: Arial">Gil<BR>-----------------------------------</SPAN></FONT>
</P></DIV>
<DIV>
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face="Times New Roman"><SPAN
style="FONT-SIZE: 12pt"></SPAN></FONT> </P></DIV></DIV></BLOCKQUOTE></BODY></HTML>