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Say I have a mesh and I have colored the vertices using vertex paint, how can I then get the average of the colors or rather the color in the middle of the face or the color under the normal (shown below) using blender python?

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    $\begingroup$ I'm sort of guessing here but I think that point can be obtained using some barycentric coordinates function. $\endgroup$
    – MarcClintDion
    Commented Feb 25, 2015 at 0:26
  • $\begingroup$ The "middle" of the face might be vague. See wikipedia for the different definitions of midpoints. I think you refer to the median / centroid according to the site linked. $\endgroup$
    – pink vertex
    Commented Feb 28, 2015 at 19:35
  • $\begingroup$ Btw there exists a function to deal with barycentric coordinates -> mathutils.geometry.barycentric_transform though this is not needed for the median $\endgroup$
    – pink vertex
    Commented Feb 28, 2015 at 19:35

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In the middle of a face is an average color of all the vertices. For triangle this means:

Col_RGB = ((R1+R2+R3)/3, (G1+G2+G3)/3, (B1+B2+B3)/3)

Where each vert has color in form of (Rn, Gn, Bn) for n in (1..3).

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    $\begingroup$ It's cheaper to add all vertex vectors and divide once by the number of vertices. $\endgroup$
    – CodeManX
    Commented Feb 24, 2015 at 22:48

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