Hello, Is there any way in rhino python to select a mesh, create a dictionary of the mesh face indices as the key, and then create values corresponding to the normals of that mesh face index? If the mesh faces have indices, can you reference the data, like the normals, of those triangles? I have b…

[image] touradnik9: Is there any way in rhino python to select a mesh, create a dictionary of the mesh face indices as the key, and then create values corresponding to the normals of that mesh face index? If the mesh faces have indices, can you reference the data, like the normals, of those tria…

Sure thing! I would like to go through triangle by triangle and change the color of the triangle based on the angle with respect to the XY plane. I need the normals in order to calculate the angle. Any help is appreciated! Tim

Thank you for that response! Can you provide an example of what the code would look like if you imported a mesh and wanted to print out each normal? Tim

With Python it would be something like: me = GetYourMesh() # method to implemented by yourself # ensure normals exist me.RebuildNormals() # loop over normals for fn in me.FaceNormals: print(fn) # fn is now a Vector3f in C# it would be something like Rhino.Geometry.Mesh mesh = GetYourMesh(); …

Use the face index of a mesh

Scripting

nathanletwory (Nathan 'jesterKing' Letwory) November 12, 2021, 6:18am 4

You can iterate over mesh faces using Mesh.Faces Property. You can iterate over face normals using Mesh.FaceNormals Property.

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Use the face index of a mesh

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