To Barycentric
What is it about?
This page covers the To Barycentric node of the Scene Nodes system in Cinema 4D. It expresses a position as barycentric coordinates relative to a triangle's vertices — the basis for interpolating data across triangle surfaces.
A given position can be described as a barycentric vector relative to the vertices of a triangle. If you like to convert a barycentric vector to a position, use the “From Barycentric” Node instead.