Index: trunk/src/search.c
===================================================================
--- trunk/src/search.c	(revision 14219)
+++ trunk/src/search.c	(revision 14220)
@@ -1153,6 +1153,28 @@
 #undef angle_in_range
 }
 
+pcb_line_t *pcb_line_center_cross_point(pcb_layer_t *layer, pcb_coord_t x, pcb_coord_t y, pcb_angle_t *ang, pcb_bool no_subc_part, pcb_bool no_term)
+{
+	pcb_rtree_it_t it;
+	pcb_rtree_box_t pt;
+	pcb_line_t *l;
+
+/* TODO: set pt coords to x and y */
+
+	for(l = pcb_rtree_first(&it, &layer->line_tree, &pt); l != NULL; l = pcb_rtree_next(&it)) {
+		/* check if line needs to be ignored and "continue;" if so:
+		   l->term is non-NULL if it's a terminal,
+		   pcb_lobj_parent_subc(pcb_parenttype_t pt, pcb_parent_t *p) returns non-NULL if it's in a subc
+		 */
+		/* if the line shouldn't be ignored, check if x;y is on the centerline and
+		   "continue;" if bad */
+		/* check if angle is required and is correct; "continue;" on mismatch */
+		return l;
+	}
+	return NULL; /* found nothing */
+}
+
+
 /* ---------------------------------------------------------------------------
  * searches for any kind of object or for a set of object types
  * the calling routine passes two pointers to allocated memory for storing
Index: trunk/src/search.h
===================================================================
--- trunk/src/search.h	(revision 14219)
+++ trunk/src/search.h	(revision 14220)
@@ -34,6 +34,7 @@
 #include "global_typedefs.h"
 #include "rats.h"
 #include "misc_util.h"
+#include "layer.h"
 
 int pcb_lines_intersect(pcb_coord_t ax1, pcb_coord_t ay1, pcb_coord_t ax2, pcb_coord_t ay2, pcb_coord_t bx1, pcb_coord_t by1, pcb_coord_t bx2, pcb_coord_t by2);
 pcb_bool pcb_arc_in_box(pcb_arc_t *arc, pcb_box_t *b);
@@ -175,6 +176,13 @@
 /* Return the distance^2 between a line-center and a point */
 double pcb_point_line_dist2(pcb_coord_t X, pcb_coord_t Y, pcb_line_t *Line);
 
+/* Return the first line object that has its centerline crossing the point;
+   if ang is not NULL, only return lines that are pointing in the right
+   angle (also accept 180 degree rotation)
+   if no_subc_part is true, ignore lines that are part of subcircuits;
+   if no_term is true, ignore lines that are terminals */
+pcb_line_t *pcb_line_center_cross_point(pcb_layer_t *layer, pcb_coord_t x, pcb_coord_t y, pcb_angle_t *ang, pcb_bool no_subc_part, pcb_bool no_term);
+
 int pcb_search_screen(pcb_coord_t X, pcb_coord_t Y, int Type, void **Result1, void **Result2, void **Result3);
 int pcb_search_grid_slop(pcb_coord_t X, pcb_coord_t Y, int Type, void **Result1, void **Result2, void **Result3);
 int pcb_search_obj_by_location(unsigned long Type, void **Result1, void **Result2, void **Result3, pcb_coord_t X, pcb_coord_t Y, pcb_coord_t Radius);