This C++ codes are developed by Shin Yoshizawa at the MPII, Saarbruecken, Germany. The method is described in my paper "Free-form Skeleton-driven Mesh Deformations", Shin Yoshizawa, Alexander G. Belyaev, and Hans-Peter Seidel, ACM Solid Modeling 2003, pp. 247-253, June 16-20, 2003, University of Washington, Seattle.