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diff --git a/intern/bsp/intern/BSP_CSGUserData.h b/intern/bsp/intern/BSP_CSGUserData.h
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+/**
+ * $Id$
+ * ***** BEGIN GPL/BL DUAL LICENSE BLOCK *****
+ *
+ * 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. The Blender
+ * Foundation also sells licenses for use in proprietary software under
+ * the Blender License.  See http://www.blender.org/BL/ for information
+ * about this.
+ *
+ * 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.
+ *
+ * The Original Code is Copyright (C) 2001-2002 by NaN Holding BV.
+ * All rights reserved.
+ *
+ * The Original Code is: all of this file.
+ *
+ * Contributor(s): none yet.
+ *
+ * ***** END GPL/BL DUAL LICENSE BLOCK *****
+ */
+
+#ifndef BSP_CSGUserData_h
+
+#define BSP_CSGUserData_h
+
+#include <vector>
+
+/**
+ * This data represents a continuous block of 
+ * data of unknown type. This holds the user
+ * data during a BSP operation.
+ */
+
+class BSP_CSGUserData 
+{
+public :
+
+	/**
+	 * width defines the size in bytes of a
+	 * single element (record) of user data
+	 */
+
+	BSP_CSGUserData(
+		const int width
+	);
+
+	/**
+	 * Reserve some space in the array
+	 */
+		void
+	Reserve(
+		int size
+	);
+
+	/**
+	 * Add a new uninitialized record to the end of the 
+	 * array
+	 */
+
+		void
+	IncSize(
+	);
+
+	/**
+	 * duplicate a recod and insert it into the end of the array
+	 * returns the index of the new record. Make sure that the
+	 * record does not belong to this buffer as this can cause errors.
+	 */
+
+		int
+	Duplicate(
+		void *
+	);
+
+		void
+	Duplicate(
+		int record_index
+	);
+
+	/**
+	 * Copies the record at position pos in the array to the
+	 * memory pointed to by output
+	 */
+
+		void
+	Copy(
+		void *output,
+		int pos
+	);	
+
+	/// Return the width of an individual record
+
+		int
+	Width(
+	) const;
+
+
+	/// return the current number of records stored in the array.
+		int
+	Size(
+	) const;
+
+
+	/// return a pointer to the start of the nth record in the array.
+
+		void *
+	operator [] (
+		const int pos
+	);
+
+private :
+
+	/// Private - force use of public constructor only.
+
+	BSP_CSGUserData(
+	);
+
+
+	/// The block of data.
+	std::vector<char> m_data;
+	/// The width of a record in this array.
+	int m_width;
+};
+
+
+#endif