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diff --git a/pcbnew/router/pns_utils.h b/pcbnew/router/pns_utils.h
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+/*
+ * KiRouter - a push-and-(sometimes-)shove PCB router
+ *
+ * Copyright (C) 2013-2014  CERN
+ * Author: Tomasz Wlostowski <tomasz.wlostowski@cern.ch>
+ *
+ * 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 3 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, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef __PNS_UTILS_H
+#define __PNS_UTILS_H
+
+#include <math/vector2d.h>
+#include <math/box2.h>
+#include <geometry/shape_line_chain.h>
+#include <geometry/shape_segment.h>
+#include <geometry/shape_rect.h>
+#include <geometry/shape_convex.h>
+
+#define HULL_MARGIN 10
+
+class PNS_ITEM;
+
+/** Various utility functions */
+
+const SHAPE_LINE_CHAIN OctagonalHull( const VECTOR2I& aP0, const VECTOR2I& aSize,
+                                      int aClearance, int aChamfer );
+
+const SHAPE_LINE_CHAIN SegmentHull( const SHAPE_SEGMENT& aSeg, int aClearance,
+                                    int aWalkaroundThickness );
+
+/**
+ * Function ConvexHull()
+ *
+ * Creates an octagonal hull around a convex polygon.
+ * @param convex The convex polygon.
+ * @param clearance The minimum distance between polygon and hull.
+ * @return A closed line chain describing the octagon.
+ */
+const SHAPE_LINE_CHAIN ConvexHull( const SHAPE_CONVEX& convex, int aClearance );
+
+SHAPE_RECT ApproximateSegmentAsRect( const SHAPE_SEGMENT& aSeg );
+
+void DrawDebugPoint( VECTOR2I aP, int aColor );
+void DrawDebugBox( BOX2I aB, int aColor );
+void DrawDebugSeg( SEG aS, int aColor );
+void DrawDebugDirs( VECTOR2D aP, int aMask, int aColor );
+
+OPT_BOX2I ChangedArea( const PNS_ITEM* aItemA, const PNS_ITEM* aItemB );
+
+#endif    // __PNS_UTILS_H