[vtkusers] Surface Normal Vectors

[Frederic DANESI]

Hi Steve,

 

As mentioned briefly in the class description : “ Sharp edges can be split
and points duplicated with separate normals to give crisp (rendered) surface
definition”

You may have to turn the splitting off (SplittingOff, and obviously
ComputePointNormalsOn and ComputeCellNormalsOff) 


 

HTH,

Fred,

 

Cordialement,

F.Danesi

-- 

Responsable Développement Informatique et Travail Collaboratif

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Conception Collaborative et la Simulation)

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www.dinccs.com

 

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De : vtkusers-bounces at vtk.org [mailto:vtkusers-bounces at vtk.org] De la part
de SHACKELFORD Steve (AREVA)
Envoyé : lundi 15 novembre 2010 22:41
À : vtkusers at vtk.org
Objet : [vtkusers] Surface Normal Vectors

 

Greetings,

 

I have a laser line scanned surface created using triangle strips.  When I
interrogate the input vtkPolyData, I find that I have 107639 points.  When I
create the vtkPolyDataNormals, I find that this contains 108698 points --
there is obviously not a one-to-one correlation between the input data and
the output for the normal filter.  I understand that the vtkPolyDataNormals
filter takes some liberties with the data to achieve a better visual
presentation, but what I am interested in is an accurate association of the
normal vectors with the original input data.

 

Any suggestions?

 

Regards,

 

Steve Shackelford

Design Engineer

Areva NP Inc., an AREVA and Siemens company

155 Mill Ridge Road

Lynchburg,  VA 24502

 

PH: (434) 832-2424

EMail: Steve.Shackelford at areva.com

 

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Merci.

 

 

 

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