Does geometry.computeVertexNormals() use weighted normals?

Questions
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1

I understand that when calculating vertex normals, one can get the “weighted” average of normals attached to a vertex versus “unweighted” average of normals. With a “weighted” average, “bigger” triangles have a higher weight when calculating the average normal for a vertex. With an “unweighted” average, all the triangles attached to a vertex have equal weight, no matter their size.

Programmatically, a “weighted” average does not normalize each triangle’s normal vector before averaging, whereas an “unweighted” average normalizes each triangle’s normal vector before averaging.

Does the calculation for geometry.computeVertexNormals() use weighted normals?

2

Looking at the source code of computeVertexNormals(), the answer is NO. No weighted normals, just the plain average of the face normals of the faces sharing a vertex.

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5

You mean it is weighted, since the normals of the faces connected to a vertex are not being normalized before being averaged?

not normalized before averaging → weighted
normalized before averaging → unweighted