View Full Version : Is there a Way to know the rotatation of a face?

08 August 2005, 10:23 AM
Hi guys, is there a way to know the rotation or translation of, say, a face in the world? NOT an object.



08 August 2005, 03:01 PM
if you can access the normal of the face you should get what you are looking for, never testet it so it is just pure cg science theorie ;)
another methode would be to get the vertiece position information of your face, interpolate between them and you get the middle of your face, this would be the position of your face in worldspace.

would be interesting to know if there is a predefined procedure for this within mel...

good luck and post your results here

08 August 2005, 03:15 PM
Thanks dude. I've thought about that normal thing, but I quickly searched the MEL reference, and I didnt find any command that would query the normals. Perhaps if I have more time, or if somebody could help, we would solve this!

Cheers Guys


08 August 2005, 03:37 PM
The command you are looking for is polyInfo.

08 August 2005, 04:26 PM
I canīt find use for that command. Cause it doesnt return the world position of a face in the space. And that is what I want. Thanks anyway


08 August 2005, 06:21 PM
It returns the vector for the face normals. Transform them by the matrix of the object to get the face normals in world space.

Then you can get the dot product of the face normal in world space and the vector [1,1,1] to detect the world space angle of rotation.

I think maya works in radians.

If I am incorrect, let me know. It's friday.

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08 August 2005, 06:21 PM
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