Develop an enhancement program (RWCap_gds2cap) for the RWCap program set.This program is to convert the industry-standard GDS-II layout data of circuit design to the inherent input format (".cap3d" file) of RWCap solver.

RWCap is a fast 3D capacitance extraction solver for interconnect wires in VLSI circuit. (see http://learn.tsinghua.edu.cn:8080/2012210858/site/#/home).