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<div>Carlos,</div>
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<div>I suspect the warp by vector filter is removing the normals because in general warping a surface invalidates the normals. Perhaps a feature request could be to add an option to warp by vector to preserve the normals.</div>
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<div>There is a filter to generate normals on a polygonal surface. It works by averaging the normals of incident polygons, but I don't think it is weighted by area.</div>
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<div>-Ken</div>
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<span style="font-weight:bold">From: </span>ParaView <<a href="mailto:paraview-bounces@paraview.org">paraview-bounces@paraview.org</a>> on behalf of Carlos Baumann <<a href="mailto:CBaumann@slb.com">CBaumann@slb.com</a>><br>
<span style="font-weight:bold">Date: </span>Monday, April 25, 2016 at 11:16 AM<br>
<span style="font-weight:bold">To: </span>"<a href="mailto:paraview@paraview.org">paraview@paraview.org</a>" <<a href="mailto:paraview@paraview.org">paraview@paraview.org</a>><br>
<span style="font-weight:bold">Subject: </span>[EXTERNAL] [Paraview] Paraview not using normals data when rendering WarpByVector<br>
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<p class="MsoNormal">Hello Paraview !<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">The attached .vtk file has quad elements defining a tube,<o:p></o:p></p>
<p class="MsoNormal">for each point or node it has defined a scalar Pressure, and two vectors, Displacement and Normals.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">When I render “Displacement Magnitude” on the surface, the normal are used, this is perfect and this is what I want, see attached snapshot,<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">However when I use WarpByVector to deform the geometry, and plotting “Displacement Magnitude” on the surface, the normals are not used,<o:p></o:p></p>
<p class="MsoNormal">each element uses its own normal, and I see the facets. How can I change this so that the normals that I have defined in the .vtk file are used ?<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Ideally I would want Paraview to use the normal at any point/node by averaging the normal of all the elements attached, weighted by the area,<o:p></o:p></p>
<p class="MsoNormal">can this be done automatically with GUI settings ?<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Thank you in advance for your help.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Regards,<br>
Carlos<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
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