Original Post
Hi, i don't know if this is the right place, but i am learning for an execise about subdivision and i don't really understand the difference scheme. My problem is, that in my script it is claimed, that if U is an subdivision scheme with Matrix U, for an polygon P=[......c(i).....] and its difference delta(P)=[.......c(i)-c(i-1)........] there exists an unique Matrix W, such that delta(PU)=(delta(P))W. There is nothing said about how to construct that Matrix, and for me it is not that obvious. I would be really happy aout some pdf's ore some other help thnx