a first implementation of doors to switch between sectors

[supertux.git] / src / vector.h

diff --git a/src/vector.h b/src/vector.h
index 21f4a6a..e45a337 100644 (file)
--- a/src/vector.h
+++ b/src/vector.h
@@ -1,3 +1,21 @@
+//  $Id$
+//
+//  SuperTux -  A Jump'n Run
+//  Copyright (C) 2004 Matthias Braun <matze@braunis.de
+//
+//  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., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 #ifndef __VECTOR_HPP__
 #define __VECTOR_HPP__
 
@@ -46,6 +64,11 @@ public:
     return Vector(x / s, y / s);
   }
 
+  Vector operator-() const
+  {
+    return Vector(-x, -y);
+  }
+
   const Vector& operator +=(const Vector& other)
   {
     x += other.x;