[vtkusers] Visualize cell normal vector of polydata

[woshizyc at gmail.com]

Thanks for your reply. It works.

The normals of the triangles are correct. What if I want to visualize only some of the normals?
Can I just modify the normal vector of the point data of centers?
I tried to set all the normal vectors that I do not want to visualize to (0,0,0). However, it does not work out as I expected. Please see the attached figure.

I want to set the vectors of red regions to be zero and leave the vectors of the blue regions untouched.

I set the normals of the red regions to be zero.

I got the attached figure, which is not what I want

Thanks a lot.






woshizyc at gmail.com
 
From: Favre Jean
Date: 2017-11-29 00:21
To: woshizyc at gmail.com; Cory Quammen
CC: vtkusers
Subject: RE: [vtkusers] Visualize cell normal vector of polydata
more specifically:

centers = vtk.vtkCellCenters()
centers.SetInputConnection(normals.GetOutputPort())

glyph.SetInputConnection(centers.GetOutputPort())

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://public.kitware.com/pipermail/vtkusers/attachments/20171129/fe6c2ab1/attachment.html>