Index: trunk/src/obj_arc.c
===================================================================
--- trunk/src/obj_arc.c	(revision 25996)
+++ trunk/src/obj_arc.c	(revision 25997)
@@ -175,19 +175,6 @@
 	Arc->bbox_naked  = pcb_arc_bbox_(Arc, 1);
 }
 
-
-void pcb_arc_get_endpt(pcb_coord_t cx, pcb_coord_t cy, pcb_coord_t width, pcb_coord_t height, pcb_angle_t astart, pcb_angle_t adelta, int which, pcb_coord_t *x, pcb_coord_t *y)
-{
-	if (which == 0) {
-		*x = pcb_round((double)cx - (double)width * cos(astart * PCB_M180));
-		*y = pcb_round((double)cy + (double)height * sin(astart * PCB_M180));
-	}
-	else {
-		*x = pcb_round((double)cx - (double)width * cos((astart + adelta) * PCB_M180));
-		*y = pcb_round((double)cy + (double)height * sin((astart + adelta) * PCB_M180));
-	}
-}
-
 void pcb_arc_get_end(pcb_arc_t *arc, int which, pcb_coord_t *x, pcb_coord_t *y)
 {
 	pcb_arc_get_endpt(arc->X, arc->Y, arc->Width, arc->Height, arc->StartAngle, arc->Delta, which, x, y);
Index: trunk/src/polyarea.h
===================================================================
--- trunk/src/polyarea.h	(revision 25996)
+++ trunk/src/polyarea.h	(revision 25997)
@@ -122,10 +122,8 @@
 pcb_bool pcb_polyarea_contour_inside(pcb_polyarea_t * c, pcb_vector_t v0);
 pcb_bool pcb_polyarea_touching(pcb_polyarea_t * p1, pcb_polyarea_t * p2);
 
-/**********************************************************************/
+/*** tools for clipping ***/
 
-/* tools for clipping */
-
 /* checks whether point lies within contour
 independently of its orientation */
 
@@ -162,4 +160,26 @@
 /* Move each point of pa1 by dx and dy */
 void pcb_polyarea_move(pcb_polyarea_t *pa1, pcb_coord_t dx, pcb_coord_t dy);
 
+/*** Tools for building polygons for common object shapes ***/
+
+
+#ifndef M_PI
+#define M_PI  3.14159265358979323846
+#endif
+double pcb_round(double x); /* from math_helper.h */
+
+/* Calculate an endpoint of an arc and return the result in *x;*y */
+PCB_INLINE void pcb_arc_get_endpt(pcb_coord_t cx, pcb_coord_t cy, pcb_coord_t width, pcb_coord_t height, pcb_angle_t astart, pcb_angle_t adelta, int which, pcb_coord_t *x, pcb_coord_t *y)
+{
+	if (which == 0) {
+		*x = pcb_round((double)cx - (double)width * cos(astart * (M_PI/180.0)));
+		*y = pcb_round((double)cy + (double)height * sin(astart * (M_PI/180.0)));
+	}
+	else {
+		*x = pcb_round((double)cx - (double)width * cos((astart + adelta) * (M_PI/180.0)));
+		*y = pcb_round((double)cy + (double)height * sin((astart + adelta) * (M_PI/180.0)));
+	}
+}
+
+
 #endif /* PCB_POLYAREA_H */