Index: trunk/src/buffer.c
===================================================================
--- trunk/src/buffer.c	(revision 5111)
+++ trunk/src/buffer.c	(revision 5112)
@@ -305,10 +305,7 @@
 	PCB_ENDALL_LOOP;
 	PCB_ARC_ALL_LOOP(Buffer->Data);
 	{
-		pcb_r_delete_entry(layer->arc_tree, (pcb_box_t *) arc);
-		pcb_rotate(&arc->X, &arc->Y, Buffer->X, Buffer->Y, cosa, sina);
-		arc->StartAngle = pcb_normalize_angle(arc->StartAngle + angle);
-		pcb_r_insert_entry(layer->arc_tree, (pcb_box_t *) arc, 0);
+		pcb_arc_rotate(layer, arc, Buffer->X, Buffer->Y, cosa, sina, angle);
 	}
 	PCB_ENDALL_LOOP;
 	/* FIXME: rotate text */
Index: trunk/src/obj_arc.c
===================================================================
--- trunk/src/obj_arc.c	(revision 5111)
+++ trunk/src/obj_arc.c	(revision 5112)
@@ -540,6 +540,14 @@
 	pcb_box_rotate90(&Arc->BoundingBox, X, Y, Number);
 }
 
+void pcb_arc_rotate(pcb_layer_t *layer, pcb_arc_t *arc, pcb_coord_t X, pcb_coord_t Y, double cosa, double sina, pcb_angle_t angle)
+{
+	pcb_r_delete_entry(layer->arc_tree, (pcb_box_t *) arc);
+	pcb_rotate(&arc->X, &arc->Y, X, Y, cosa, sina);
+	arc->StartAngle = pcb_normalize_angle(arc->StartAngle + angle);
+	pcb_r_insert_entry(layer->arc_tree, (pcb_box_t *) arc, 0);
+}
+
 /* rotates an arc */
 void *RotateArc(pcb_opctx_t *ctx, pcb_layer_t *Layer, pcb_arc_t *Arc)
 {
Index: trunk/src/obj_arc.h
===================================================================
--- trunk/src/obj_arc.h	(revision 5111)
+++ trunk/src/obj_arc.h	(revision 5112)
@@ -56,7 +56,9 @@
 /*** Utility ***/
 void pcb_arc_bbox(pcb_arc_t *Arc);
 void pcb_arc_rotate90(pcb_arc_t *Arc, pcb_coord_t X, pcb_coord_t Y, unsigned Number);
+void pcb_arc_rotate(pcb_layer_t *layer, pcb_arc_t *arc, pcb_coord_t X, pcb_coord_t Y, double cosa, double sina, pcb_angle_t angle);
 
+
 pcb_box_t *pcb_arc_get_ends(pcb_arc_t *Arc);
 void pcb_arc_set_angles(pcb_layer_t *Layer, pcb_arc_t *a, pcb_angle_t new_sa, pcb_angle_t new_da);
 void pcb_arc_set_radii(pcb_layer_t *Layer, pcb_arc_t *a, pcb_coord_t new_width, pcb_coord_t new_height);