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diff --git a/apps/plugins/doom/m_bbox.h b/apps/plugins/doom/m_bbox.h
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+++ b/apps/plugins/doom/m_bbox.h
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+/* Emacs style mode select   -*- C++ -*-
+ *-----------------------------------------------------------------------------
+ *
+ *
+ *  PrBoom a Doom port merged with LxDoom and LSDLDoom
+ *  based on BOOM, a modified and improved DOOM engine
+ *  Copyright (C) 1999 by
+ *  id Software, Chi Hoang, Lee Killough, Jim Flynn, Rand Phares, Ty Halderman
+ *  Copyright (C) 1999-2000 by
+ *  Jess Haas, Nicolas Kalkhof, Colin Phipps, Florian Schulze
+ *
+ *  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.
+ *
+ * DESCRIPTION:
+ *    Simple bounding box datatype and functions.
+ *
+ *-----------------------------------------------------------------------------*/
+
+
+#ifndef __M_BBOX__
+#define __M_BBOX__
+
+#include <limits.h>
+#include "m_fixed.h"
+
+/* Bounding box coordinate storage. */
+enum
+{
+   BOXTOP,
+   BOXBOTTOM,
+   BOXLEFT,
+   BOXRIGHT
+};  /* bbox coordinates */
+
+/* Bounding box functions. */
+
+void M_ClearBox(fixed_t* box);
+
+void M_AddToBox(fixed_t* box,fixed_t x,fixed_t y);
+
+#endif