/** * Creates a new QuadEdge quartet from {@link Vertex} o to {@link Vertex} d. * * @param o * the origin Vertex * @param d * the destination Vertex * @return the new QuadEdge quartet */ public static QuadEdge makeEdge(Vertex o, Vertex d) { QuadEdge q0 = new QuadEdge(); QuadEdge q1 = new QuadEdge(); QuadEdge q2 = new QuadEdge(); QuadEdge q3 = new QuadEdge(); q0.rot = q1; q1.rot = q2; q2.rot = q3; q3.rot = q0; q0.setNext(q0); q1.setNext(q3); q2.setNext(q2); q3.setNext(q1); QuadEdge base = q0; base.setOrig(o); base.setDest(d); return base; }