<div style="line-height:1.7;color:#000000;font-size:14px;font-family:arial"><div>Hi David,</div><div>I've compiled the example. It works well, and I think it is exactly what I want. Thanks a lot for your timely reply.</div><div> </div><div>Regards,</div><div>Yue<br><br><br><br></div><div></div><div id="divNeteaseMailCard"></div><div></div>At 2013-11-21 21:03:04,"David Doria-2-3 [via VTK]" <<a href="/user/SendEmail.jtp?type=node&node=5724604&i=0" target="_top" rel="nofollow" link="external">[hidden email]</a>> wrote:<br> <blockquote style='border-left:2px solid #CCCCCC;padding:0 1em' style="margin: 0px 0px 0px 0.8ex; padding-left: 1ex; border-left-color: rgb(204, 204, 204); border-left-width: 1px; border-left-style: solid;" id="isReplyContent">
On Thu, Nov 21, 2013 at 7:35 AM, Green Hedgehog <<a href="/user/SendEmail.jtp?type=node&node=5724550&i=0" rel="nofollow" target="_top" link="external">[hidden email]</a>> wrote:
<br>> Hi all,
<br>> There's a point outside or inside a closed surface, and I want to find a
<br>> point on the surface which is closest to the specified point. The solution
<br>> may not be a vertex, but just a point lying on the triangle. Currently I
<br>> have no idea. Has anyone got any suggestions? Thanks in advance.
<br>>
<br>> Regards,
<br>> Yue
<br><br>I believe the FindClosestPoint function of vtkCellLocator does what
<br>you're looking for:
<br><a href="http://www.vtk.org/Wiki/VTK/Examples/Cxx/PolyData/CellLocator" rel="nofollow" target="_top" link="external">http://www.vtk.org/Wiki/VTK/Examples/Cxx/PolyData/CellLocator</a><br><br>If you can confirm that this works directly and let me know, I'll add
<br>notes and keywords to that example to the effect of "projecting a
<br>point onto a mesh" and "closest point on a mesh" as this is a very
<br>reasonable operation that has a not-so-intuitive name in VTK.
<br><br>David
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