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diff --git a/src/game-server/collisiondetection.h b/src/game-server/collisiondetection.h
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+/*
+ *  The Mana Server
+ *  Copyright (C) 2004-2010  The Mana World Development Team
+ *
+ *  This file is part of The Mana Server.
+ *
+ *  The Mana Server 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
+ *  any later version.
+ *
+ *  The Mana Server 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 The Mana Server.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef COLLISIONDETECTION_H
+#define COLLISIONDETECTION_H
+
+class Point;
+
+/**
+ * This namespace collects all needed collision detection functions
+ */
+namespace Collision
+{
+
+    bool circleWithCirclesector(const Point &circlePos, int circleRadius,
+                                const Point &secPos, int secRadius,
+                                float secAngle, float secSize);
+
+    /**
+     * Checks if a disk and a circle-sector collide
+     *
+     * @param halfTopAngle
+     *        The half-top-angle of the circle sector in degrees (0,359).
+     * @param placeAngle
+     *        The placement-angle of the circle sector in degrees (0,359).
+     */
+    bool diskWithCircleSector(const Point &diskCenter, int diskRadius,
+                              const Point &sectorCenter, int sectorRadius,
+                              int halfTopAngle, int placeAngle);
+
+    /**
+     * Checks if two circles intersect.
+     */
+    bool circleWithCircle(const Point &center1, int radius1,
+                          const Point &center2, int radius2);
+}
+
+#endif