When we set up the nodal equations, which is associated with ideal voltage sources, we can use an enclosed surface to encircle these nodes and think of it as a general node.

In this paper, is presented the technique of calculating the nodal values of the distributed contact forces on the contact surface from the nodal lumped contact forces.

The complex surfaces on a sculpture was fitted with elliptic curves in sets based on the surface nodal points and the elliptic fitting algorithm was presented.