Index: trunk/src/plugins/rt_topo/crbs_cdt.c
===================================================================
--- trunk/src/plugins/rt_topo/crbs_cdt.c	(revision 1360)
+++ trunk/src/plugins/rt_topo/crbs_cdt.c	(revision 1361)
@@ -31,6 +31,54 @@
 #include "geo.h"
 #include "gengeo2d/cline.h"
 
+static void long_constrained_edge(cdt_t *cdt, point_t *p1, point_t *p2, double maxlen2, double maxlen, void *udata)
+{
+	edge_t *e;
+	double dx = p2->pos.x - p1->pos.x, dy = p2->pos.y - p1->pos.y;
+	double len2 = dx*dx + dy*dy;
+
+
+	if (len2 > maxlen2) {
+		double d, len, x, y;
+		long spn, n;
+		point_t *lp, *p;
+
+		len = sqrt(len2);
+		spn = ceil(len/maxlen);
+printf("A dx;dy=%f;%f\n", dx, dy);
+		dx /= ((double)spn+1);
+		dy /= ((double)spn+1);
+printf("B dx;dy=%f;%f\n", dx, dy);
+		x = p1->pos.x;
+		y = p1->pos.y;
+		lp = p1;
+
+printf("spn=%d\n", spn);
+		for(n = 0; n < spn; n++) {
+			x += dx;
+			y += dy;
+printf(" [%ld] %f %f\n", n, x, y);
+			p = cdt_insert_point(cdt, x, y);
+			if (p == NULL) {
+printf("  oops\n");
+				continue;
+			}
+			e = cdt_insert_constrained_edge(cdt, lp, p);
+			e->data = udata;
+			lp = p;
+		}
+printf(" end   %f %f\n", p2->pos.x, p2->pos.y);
+
+		e = cdt_insert_constrained_edge(cdt, lp, p2);
+		e->data = udata;
+printf("ok\n");
+	}
+	else {
+		e = cdt_insert_constrained_edge(cdt, p1, p2);
+		e->data = udata;
+	}
+}
+
 void rt_topo_crbs_cdt_init(rtrnd_t *ctx, rtrnd_layer_t *ly, crbs_t *crbs)
 {
 	rtrnd_any_obj_t *obj;
@@ -41,7 +89,10 @@
 	rtp_vertex_t *v;
 	edge_t *e;
 	long n;
+	double maxl2, maxlen = (rt_topo_cfg.wire_thick + rt_topo_cfg.wire_clr/2) * 50; /* split long constrained edges so that no segment is longer than this value */
 
+	maxl2 = maxlen*maxlen;
+
 	cdt_init(cdt, ctx->board->hdr.bbox.x1, ctx->board->hdr.bbox.y1, ctx->board->hdr.bbox.x2, ctx->board->hdr.bbox.y2);
 
 	for(via = rtrnd_rtree_all_first(&it, &ctx->board->vias); via != NULL; via = rtrnd_rtree_all_next(&it))
@@ -52,10 +103,7 @@
 			case RTRND_LINE:
 				p1 = cdt_insert_point(&crbs->cdt, obj->line.cline.p1.x, obj->line.cline.p1.y);
 				p2 = cdt_insert_point(&crbs->cdt, obj->line.cline.p2.x, obj->line.cline.p2.y);
-				if (p1 != p2) {
-					e = cdt_insert_constrained_edge(cdt, p1, p2);
-					e->data = obj;
-				}
+				long_constrained_edge(&crbs->cdt, p1, p2, maxl2, maxlen, obj);
 				break;
 			case RTRND_POLY:
 				v = gdl_last(&obj->poly.rtpoly.lst);
@@ -62,8 +110,7 @@
 				p2 = cdt_insert_point(&crbs->cdt, v->x, v->y);
 				for(v = gdl_first(&obj->poly.rtpoly.lst); v != NULL; v = gdl_next(&obj->poly.rtpoly.lst, v)) {
 					p1 = cdt_insert_point(&crbs->cdt, v->x, v->y);
-					e = cdt_insert_constrained_edge(cdt, p1, p2);
-					e->data = obj;
+					long_constrained_edge(&crbs->cdt, p1, p2, maxl2, maxlen, obj);
 					p2 = p1;
 				}
 				break;
@@ -75,7 +122,7 @@
 
 	if (crbs->enable_mid_virt) {
 		vtd0_t np = {0};
-		double minlen2 = (rt_topo_cfg.wire_thick + rt_topo_cfg.wire_clr/2) * 4; /* minimum length of an edge to split */
+		double minlen2 = (rt_topo_cfg.wire_thick + rt_topo_cfg.wire_clr/2) * 16; /* minimum length of an edge to split */
 
 		minlen2 = minlen2 * minlen2;