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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:Calibri">Chiranjib,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:Calibri"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:Calibri">You can use either the Probe Location or the Resample With Dataset filter to find out if one or more points are in the space of a data set (including a surface). Both these filters use
the same VTK filter under the covers. They just define the probing points differently. That will tell you if a point is on the surface (but not inside or outside).<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:Calibri"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:Calibri">These filters have an output array named vtkValidPointMask that is set to 1 for points in the cells and 0 for points outside the cells.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:Calibri"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:Calibri">Be aware though that you might run into problems with determining whether a point is exactly in a polygon. I’m not sure how the tolerance works in these filters.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:Calibri"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:Calibri">-Ken<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:Calibri"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:Calibri"><o:p> </o:p></span></p>
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<p class="MsoNormal"><b><span style="font-family:Calibri;color:black">From: </span>
</b><span style="font-family:Calibri;color:black">Paraview-developers <paraview-developers-bounces@paraview.org> on behalf of Chiranjib Sur <sur.chiranjib@gmail.com><br>
<b>Date: </b>Wednesday, April 6, 2016 at 8:58 AM<br>
<b>To: </b>Paraview Developer Mailing list <paraview-developers@paraview.org><br>
<b>Subject: </b>[EXTERNAL] [Paraview-developers] determine points on the surface of a polydata<o:p></o:p></span></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal"> <o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">Hi All, <o:p></o:p></p>
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<p class="MsoNormal">I am wondering if there is any method to determine whether a given point is on the surface of a polydata?<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">The following example : <a href="http://www.vtk.org/Wiki/VTK/Examples/Cxx/PolyData/PointInsideObject" target="_blank">http://www.vtk.org/Wiki/VTK/Examples/Cxx/PolyData/PointInsideObject</a><o:p></o:p></p>
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<p class="MsoNormal">shows how to determine whether a point is inside or outside of a polydata surface. <o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">What I am looking for is a method to determine if the point in just on the surface?<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">I have posted this to the VTk developer mailing list and posting here with a hope that somebody might look at this thread.<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">Thanks much for your time and suggestions. <o:p></o:p></p>
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<p class="MsoNormal"><span style="color:#888888"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="color:#888888">Chiranjib<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="color:#888888"><o:p> </o:p></span></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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