I understood this equation to mean that you start with some vertex v that represents a point on the skin surface, and for every bone that contributes to this vertex, calculate the vertex transformed by that bone’s transformation matrix, finally adding up all the transformed vertex values as a weighted sum based on how much each bone influences v.
I understood this equation to mean that you start with some vertex v that represents a point on the skin surface, and for every bone that contributes to this vertex, calculate the vertex transformed by that bone’s transformation matrix, finally adding up all the transformed vertex values as a weighted sum based on how much each bone influences v.