Samples an attribute from another mesh.
This is similar to the intent of a Houdini attribute transfer,
but the sampling takes surface faces into account instead of just point proximity.
Each indexed point on an Input Surface gets an interpolated
value from the nearest face on the Source Surface.
A barycentric evaluation on the source face is used to interpolate
the attributes values of that face's vertices.
A string Attribute specifies the name of the attribute
on the source to be sampled and the name of the attribute on the input
to be created.
tested in Houdini
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