surface Normals
 

Hi to all..
I generated 3D unstructured Mesh in gridgen. Now need surface normals.
So can anybody know how to take surface normals, by any commercial software package & aslo by C Programming..
Plz reply me ...

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Madhukar

Check any good Finite Element book and you should find this described in details: for a given planar surface (a polygonal face) take two intersecting vectors and calculate their cross product, this will give you the normal to that surface ...

Also you can try ... Google:

http://www.opengl.org/wiki/Calculating_a_Surface_Normal

Do


Do

Thank Q for reply,
Is there any method to get surface normals by commercial CFD softwares?..