public static DoublyConnectedEdgeList linesToDCEdgeList(LineCollection lc) {
DoublyConnectedEdgeList p = new DoublyConnectedEdgeList();
Vector<Line> l = lc.getAllLines();
for (int i = 0; i < l.size(); i++) {
p.addHalfEdge(new DCHalfEdge(l.get(i).start.copy(), l.get(i).end.copy()));
}
return p;
}
