Move DIRECTION45 to common/geometry

This class is useful for generic geometric layout of 45-deg constrained
line chains, not only in the PNS router.

include/geometry/direction45.h

@@ -1,8 +1,9 @@
 /*
- * KiRouter - a push-and-(sometimes-)shove PCB router
+ * This program source code file is part of KiCad, a free EDA CAD application.
  *
  * Copyright (C) 2013-2015 CERN
  * Author: Tomasz Wlostowski <tomasz.wlostowski@cern.ch>
+ * Copyright (C) 2017 KiCad Developers, see AUTHORS.txt for contributors.
  *
  * 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
@@ -18,8 +19,8 @@
  * with this program.  If not, see <http://www.gnu.or/licenses/>.
  */
 
-#ifndef __DIRECTION_H
-#define __DIRECTION_H
+#ifndef DIRECTION45_H
+#define DIRECTION45_H
 
 #include <geometry/seg.h>
 #include <geometry/shape_line_chain.h>
@@ -354,4 +355,4 @@ private:
     Directions m_dir;
 };
 
-#endif    // __DIRECTION_H
+#endif    // DIRECTION45_H

pcbnew/router/pns_diff_pair.cpp

@@ -24,12 +24,12 @@
 #include <cmath>
 #include <limits>
 
+#include <geometry/direction45.h>
 #include <geometry/shape.h>
 #include <geometry/shape_rect.h>
 #include <geometry/shape_circle.h>
 #include <geometry/shape_segment.h>
 
-#include "direction.h"
 
 #include "pns_diff_pair.h"
 #include "pns_router.h"

pcbnew/router/pns_line.h

@@ -24,11 +24,11 @@
 
 #include <math/vector2d.h>
 
+#include <geometry/direction45.h>
 #include <geometry/seg.h>
 #include <geometry/shape.h>
 #include <geometry/shape_line_chain.h>
 
-#include "direction.h"
 #include "pns_item.h"
 #include "pns_via.h"
 

pcbnew/router/pns_routing_settings.cpp

@@ -21,8 +21,9 @@
 
 #include <tool/tool_settings.h>
 
+#include <geometry/direction45.h>
+
 #include "pns_routing_settings.h"
-#include "direction.h"
 
 namespace PNS {
 

pcbnew/tools/drawing_tool.cpp

@@ -40,7 +40,7 @@
 #include <view/view.h>
 #include <gal/graphics_abstraction_layer.h>
 #include <tool/tool_manager.h>
-#include <router/direction.h>
+#include <geometry/direction45.h>
 #include <ratsnest_data.h>
 #include <board_commit.h>
 #include <scoped_set_reset.h>