compute node normal on exterior surface of mesh

[Lesage,Anne Cecile J]

Dear all

 

I see in the python documentation that  the mesh class has a function normal_of_face

 

I would like to compute the mean normal at node points (mean of the faces normal to which this point belong) on the exterior surface of the mesh

I have the list of those points id

 

This is to do a direction test for setting boundary conditions

 

Thank you

Regards

Anne-Cecile

 

 

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