Multi-Curve to Multi-Curve Contact represents contact forces between curves. Multi-Curve to Multi-Curve Contact supports spring, damping and friction forces. Action and base geometries are represented by using Multi-Curves of Curvesets as shown in Surface Based on Multiple Curves in the Motion Theory Reference. Curvesets on the action and base bodies must be specified before creating the contact. Multi-Curve to Multi-Curve Contact calculates its force based on the penetration and relative velocities between the curves at the contact point. The action force is applied at the contact point on the action surface and an equal and opposite reaction force is applied at the same position on the base surface. Multi-Curve to Multi-Curve Contact is only available for contact between rigid bodies.