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<p class="MsoNormal">Dear, All,<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">I am sure the following had come up before, but I can’t find all the information I need to get this done.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">I have a point cloud with a scalar value attached to each point. I would like to reconstruct the surface from the point cloud as a triangular mesh and interpolate the scalar values on this mesh. I am using Paraview 4.3.1. I found a couple
of messages from David DeMarle on exactly this theme back in January of 2015. The instruction on his email get me almost there, but not quite.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Here is what I did:<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoListParagraph" style="text-indent:-.25in;mso-list:l1 level1 lfo2"><![if !supportLists]><span style="mso-list:Ignore">(1)<span style="font:7.0pt "Times New Roman"">
</span></span><![endif]>I read the .csv data into Paraview (data read as x,y,z,fval)<o:p></o:p></p>
<p class="MsoListParagraph" style="text-indent:-.25in;mso-list:l1 level1 lfo2"><![if !supportLists]><span style="mso-list:Ignore">(2)<span style="font:7.0pt "Times New Roman"">
</span></span><![endif]>Attached a Table to Points filter and made sure that the X,Y,Z columns point to the appropriate values.<o:p></o:p></p>
<p class="MsoListParagraph" style="text-indent:-.25in;mso-list:l1 level1 lfo2"><![if !supportLists]><span style="mso-list:Ignore">(3)<span style="font:7.0pt "Times New Roman"">
</span></span><![endif]>I can now visualize the points in 3D space and the points are colored according to fval.<o:p></o:p></p>
<p class="MsoListParagraph" style="text-indent:-.25in;mso-list:l1 level1 lfo2"><![if !supportLists]><span style="mso-list:Ignore">(4)<span style="font:7.0pt "Times New Roman"">
</span></span><![endif]>Per David’s email, I attached a programmable filter to the table, as output I chose “same as input” then wrote the following in the script box:<o:p></o:p></p>
<p class="MsoListParagraph"><o:p> </o:p></p>
<p class="MsoListParagraph">import vtk<o:p></o:p></p>
<p class="MsoListParagraph">pdi = self.GetPolyDataInput()<o:p></o:p></p>
<p class="MsoListParagraph">subf1 = vtk.vtkSurfaceReconstructionFilter()<o:p></o:p></p>
<p class="MsoListParagraph">subf1.SetInputData(pdi)<o:p></o:p></p>
<p class="MsoListParagraph">subf2 = vtk.vtkContourFilter()<o:p></o:p></p>
<p class="MsoListParagraph">subf2.SetInputConnection(subf1.GetOutputPort())<o:p></o:p></p>
<p class="MsoListParagraph">subf2.Update()<o:p></o:p></p>
<p class="MsoListParagraph">pdo = self.GetPolyDataOutput()<o:p></o:p></p>
<p class="MsoListParagraph">pdo.ShallowCopy(subf2.GetOutput())<o:p></o:p></p>
<p class="MsoListParagraph"><o:p> </o:p></p>
<p class="MsoListParagraph" style="text-indent:-.25in;mso-list:l1 level1 lfo2"><![if !supportLists]><span style="mso-list:Ignore">(5)<span style="font:7.0pt "Times New Roman"">
</span></span><![endif]>A beautiful triangular mesh from the point cloud is now available. But the fval values are not available. As data arrays I see ImageScalars with range [0,0] and Normals. So I guess fval is not being passed along.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Thank you in advance for any help.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Best regards,<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Gonzalo<o:p></o:p></p>
<p class="MsoListParagraph"><o:p></o:p></p>
<p class="MsoNormal" style="line-height:115%"><span style="font-size:10.0pt;line-height:115%;font-family:"Arial","sans-serif"">Gonzalo R. Feijóo<o:p></o:p></span></p>
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