Index: plugins/rt_topo/laa3_render.c
===================================================================
--- plugins/rt_topo/laa3_render.c	(revision 1465)
+++ plugins/rt_topo/laa3_render.c	(revision 1466)
@@ -93,7 +93,7 @@
 	rt_topo_laa_2net_t *tn;
 	laa2rbs_t *l2r, *ch;
 	int bi, tni;
-	long n, added;
+	long n, added, uid_2net = 0;
 	vtp0_t ord = {0};
 	uall_stacks_t ordstk = {0};
 	uall_sysalloc_t sys = {0};
@@ -167,6 +167,7 @@
 			res2net->x[0] = br1->x; res2net->y[0] = br1->y;
 			res2net->x[1] = br2->x; res2net->y[1] = br2->y;
 			res2net->net = br1->parent->net;
+			res2net->uid = uid_2net++;
 			gdl_append(lst, res2net, link);
 			l2r->inserted = 1;
 printf("Insert: %p\n", l2r);
Index: plugins/rt_topo/rt_topo.h
===================================================================
--- plugins/rt_topo/rt_topo.h	(revision 1465)
+++ plugins/rt_topo/rt_topo.h	(revision 1466)
@@ -6,6 +6,7 @@
 typedef struct {
 	double x[2], y[2];        /* endpoint coords */
 	rtrnd_net_t *net;         /* the net this 2net is part of */
+	long uid;
 	gdl_elem_t link;          /* part of an ordered list of 2nets on the same layer */
 } rt_topo_2net_t;