public static void swapEdge(QuadEdge e) {
QuadEdge a = e.oprev();
QuadEdge b = e.sym().oprev();
splice(e, a);
splice(e.sym(), b);
splice(e, a.lnext());
splice(e.sym(), b.lnext());
e.orig = a.dest();
e.sym().orig = b.dest();
}
/**
* Create a new QuadEdge by connecting 2 QuadEdges
*
* @param e1,e2 the 2 QuadEdges to connect
* @return the new QuadEdge
*/
public static QuadEdge connect(QuadEdge e1, QuadEdge e2) {
QuadEdge q = makeEdge(e1.dest(), e2.orig());
splice(q, e1.lnext());
splice(q.sym(), e2);
return q;
}
