[Paraview] Paraview not using normals data when rendering WarpByVector

[Moreland, Kenneth]

Carlos,

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.

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.

-Ken


From: ParaView <paraview-bounces at paraview.org<mailto:paraview-bounces at paraview.org>> on behalf of Carlos Baumann <CBaumann at slb.com<mailto:CBaumann at slb.com>>
Date: Monday, April 25, 2016 at 11:16 AM
To: "paraview at paraview.org<mailto:paraview at paraview.org>" <paraview at paraview.org<mailto:paraview at paraview.org>>
Subject: [EXTERNAL] [Paraview] Paraview not using normals data when rendering WarpByVector

Hello Paraview !

The attached .vtk file has quad elements defining a tube,
for each point or node it has defined a scalar Pressure, and two vectors, Displacement and Normals.

When I render “Displacement Magnitude” on the surface, the normal are used, this is perfect and this is what I want, see attached snapshot,

However when I use WarpByVector to deform the geometry, and plotting “Displacement Magnitude” on the surface, the normals are not used,
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 ?

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,
can this be done automatically with GUI settings ?

Thank you in advance for your help.

Regards,
Carlos





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