[Maya-Python] How to link polyNormalPerVertex with a locator orientation ?

[f***@gmail.com]

Hello there

I got the normals vertex with:


cmds.select( ** my vertex **, r=True )
resultNormalVertex=cmds.polyNormalPerVertex( query=True, xyz=True )


Result -> [0.9876886606216431, 0.0, -0.15643233060836792] which I guess is a vector.

I create a locator at the same vertex position, but would like also to have a correct orientation based on the vertex normals.

What would be the right python command for that ?

[Marcus Ottosson]

One way of getting an orientation from that, is by creating locator A at
that point, locator B at the origin, and aim constrain B to A. Then B will
contain one (of many possible) orientations for that vector. If you like
math, you can also have a look at (pun!) calculating the orientation from
three points; that vector, the origin and an "up vector", for example (0,
1, 0). In OpenGL, such an operation is called "look at"
<https://stackoverflow.com/questions/21830340/understanding-glmlookat> and
is what the aim constraint is doing too.

Post by f***@gmail.com
Hello there
cmds.select( ** my vertex **, r=True )
resultNormalVertex=cmds.polyNormalPerVertex( query=True, xyz=True )
Result -> [0.9876886606216431, 0.0, -0.15643233060836792] which I guess is a vector.
I create a locator at the same vertex position, but would like also to
have a correct orientation based on the vertex normals.
What would be the right python command for that ?
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