Index: draw_wireframe.h
===================================================================
--- draw_wireframe.h	(nonexistent)
+++ draw_wireframe.h	(revision 11028)
@@ -0,0 +1,82 @@
+/*
+ *                            COPYRIGHT
+ *
+ *  PCB, interactive printed circuit board design
+ *  Copyright (C) 1994,1995,1996 Thomas Nau
+ *  21 Aug 2017 : Draw functiuons extracted from crosshair.c
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; either version 2 of the License, or
+ *  (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program; if not, write to the Free Software
+ *  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+ *
+ *  Contact addresses for paper mail and Email:
+ *  Thomas Nau, Schlehenweg 15, 88471 Baustetten, Germany
+ *  Thomas.Nau@rz.uni-ulm.de
+ *
+ */
+#ifndef PCB_DRAW_WIREFRAME_H
+#define PCB_DRAW_WIREFRAME_H
+
+
+#include "config.h"
+#include "hid.h"
+/*#include "board.h"*/
+
+/*-----------------------------------------------------------
+ * Draws the outline of an arc
+ */
+static inline PCB_FUNC_UNUSED void 
+pcb_draw_wireframe_arc(pcb_hid_gc_t gc,pcb_arc_t * arc)
+{
+	pcb_coord_t wid = arc->Thickness / 2;
+	pcb_coord_t x1,y1,x2,y2;
+
+	pcb_arc_get_end(arc, 0, &x1, &y1);
+	pcb_arc_get_end(arc, 1, &x2, &y2);
+
+	pcb_gui->draw_arc(gc, arc->X, arc->Y, arc->Width + wid, arc->Height + wid, arc->StartAngle, arc->Delta);
+	if (wid > pcb_pixel_slop) {
+		pcb_gui->draw_arc(gc, arc->X, arc->Y, arc->Width - wid, arc->Height - wid, arc->StartAngle, arc->Delta);
+		pcb_gui->draw_arc(gc, x1, y1, wid, wid, arc->StartAngle, -180 * SGN(arc->Delta));
+		pcb_gui->draw_arc(gc, x2, y2, wid, wid, arc->StartAngle + arc->Delta, 180 * SGN(arc->Delta));
+	}
+}
+
+/*-----------------------------------------------------------
+ * Draws the outline of a line
+ */
+static inline PCB_FUNC_UNUSED void 
+pcb_draw_wireframe_line(pcb_hid_gc_t gc,pcb_coord_t x1, pcb_coord_t y1, pcb_coord_t x2, pcb_coord_t y2, pcb_coord_t thick)
+{
+	pcb_coord_t dx, dy, ox, oy;
+	double h;
+
+	dx = x2 - x1;
+	dy = y2 - y1;
+	if (dx != 0 || dy != 0)
+		h = 0.5 * thick / sqrt(PCB_SQUARE(dx) + PCB_SQUARE(dy));
+	else
+		h = 0.0;
+	ox = dy * h + 0.5 * SGN(dy);
+	oy = -(dx * h + 0.5 * SGN(dx));
+	pcb_gui->draw_line(gc, x1 + ox, y1 + oy, x2 + ox, y2 + oy);
+	if (coord_abs(ox) >= pcb_pixel_slop || coord_abs(oy) >= pcb_pixel_slop) {
+		pcb_angle_t angle = atan2(dx, dy) * 57.295779;
+		pcb_gui->draw_line(gc, x1 - ox, y1 - oy, x2 - ox, y2 - oy);
+		pcb_gui->draw_arc(gc, x1, y1, thick / 2, thick / 2, angle - 180, 180);
+		pcb_gui->draw_arc(gc, x2, y2, thick / 2, thick / 2, angle, 180);
+	}
+}
+
+#endif /* ! defined PCB_DRAW_WIREFRAME_H */
+