Shortest Networks for Smooth Curves

In this paper we set up a new model of shortest networks that interconnects a set of smooth curves and avoids a set of smoothly bounded obstacles. Using the hexagonal coordinate system we show how the problem of determining a full Steiner tree with a given topology in such a network can be converted to a problem of solving a set of simultaneous equations. Moreover, the number of equations is linearly dependent on the number of curves and obstacles if all curves and all boundaries of obstacles are convex. Hence, any existing numerical methods and computer programs for solving equations can be used to solve this shortest network problem.