<div dir="ltr"><div class="gmail_default" style="font-size:small">Hi all,</div><div class="gmail_default" style="font-size:small">In order to introduce more triangles, I don't think that there is any need to do multiple successive extrusions.</div><div class="gmail_default" style="font-size:small">I would suggest using vtkLinearSubdivisionFilter to achieve what I think you want.</div><div class="gmail_default" style="font-size:small"><br></div><div class="gmail_default" style="font-size:small">Please see the attached modification of your code.</div><div class="gmail_default" style="font-size:small"><br></div><div class="gmail_default" style="font-size:small">Note:</div><div class="gmail_default" style="font-size:small">1) You need to pass extrude through vtkTriangleFilter then apply vtkLinearSubdivisionFilter.</div><div class="gmail_default" style="font-size:small">2) Experiment with changing numberOfSubdivisions in the attached code.</div><div class="gmail_default" style="font-size:small"><br></div><div class="gmail_default" style="font-size:small">Regards</div><div class="gmail_default" style="font-size:small"> Andrew</div><div class="gmail_extra"><br><div class="gmail_quote"><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><br>---------- Forwarded message ----------<br>From: <div class="gmail_default" style="font-size:small;display:inline"></div>Girish Lande <<a href="mailto:girish.lande@agiliad.com">girish.lande@agiliad.com</a>><br>To: <div class="gmail_default" style="font-size:small;display:inline"></div>arwtyxouymz <<a href="mailto:arw.tyx-ouy_mz@ezweb.ne.jp">arw.tyx-ouy_mz@ezweb.ne.jp</a>><br>Cc: <a href="mailto:vtkusers@vtk.org">vtkusers@vtk.org</a><br>Bcc: <br>Date: Fri, 28 Jul 2017 10:00:44 +0530<br>Subject: Re: [vtkusers] Normal vector of the surface of ellipstic cylinder<br><div dir="ltr">I think you need to find a way to introduce more triangles in your polydata.<div><br></div><div>One way I can think of is to create multiple successive extrusions instead of creating one single extrusion. And then append polydata of these multiple extrusions which will definitely have more points and triangles. (Please see attached image). Your current polydata is represented by fig. A. and what you need is polydata as per figure B.</div><div><img src="cid:ii_15d877598bcdf25c" alt="Inline images 1" width="472" height="289"><br></div></div><div class="gmail_extra"><br><div class="gmail_quote">On 28 July 2017 at 09:19, arwtyxouymz <span dir="ltr"><<a href="mailto:arw.tyx-ouy_mz@ezweb.ne.jp" target="_blank">arw.tyx-ouy_mz@ezweb.ne.jp</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">Thank you Girish Lande!<br>
<br>
Can I not get normals the side surface of about my extruded object?<br>
Should i change the extrusion method to create elliptic cylinder if I want<br>
to get the side surface normals?<br>
<br>
But I don't know other ways....<br>
<br>
please tell me!<br>
<br>
<br>
<br>
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</div></div></blockquote></div><br><br clear="all"><div><br></div>-- <br><div class="gmail-m_-4289773330618687635gmail_signature"><div dir="ltr">thanks & regards,<div>Girish</div><div><br></div></div></div>
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</blockquote></div><div><br></div>-- <br><div class="gmail_signature">___________________________________________<br>Andrew J. P. Maclean<br><br>___________________________________________</div>
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