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diff --git a/intern/decimation/extern/LOD_decimation.h b/intern/decimation/extern/LOD_decimation.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 *****
+ */
+
+/**
+
+ * @author Laurence Bourn
+ * @date 6/7/2001
+ *
+ * This is the external interface for the decimation module.
+ */
+
+#ifndef NAN_INCLUDED_LOD_decimation_h
+#define NAN_INCLUDED_LOD_decimation_h
+
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/** 
+ * External decimation structure
+ */
+
+typedef struct LOD_Decimation_Info {
+	float * vertex_buffer;
+	float * vertex_normal_buffer;
+	int * triangle_index_buffer;
+	int vertex_num;
+	int face_num;
+	void * intern;
+} LOD_Decimation_Info; 
+
+typedef LOD_Decimation_Info* LOD_Decimation_InfoPtr;
+
+/** 
+ * Create internal mesh representation from 
+ * LOD_Decimation_Info structure.
+ * @return 1 on successful loading
+ * @return 0 on failure
+ * @warning This should be changed to return an enumeration
+ * detailing the error encountered
+ */
+
+extern int LOD_LoadMesh(LOD_Decimation_InfoPtr info);
+
+/**
+ * Allocate and Compute internal data strucures required for
+ * decimation.
+ * @return 1 on successful computation of data
+ * @return 0 on failure
+ * @warning This should be changed to return an enumeration
+ * detailing the error encountered
+ */
+
+extern int LOD_PreprocessMesh(LOD_Decimation_InfoPtr info);
+
+/** 
+ * Once both the stages above have been completed
+ * this function collapses a single edge in the mesh.
+ * The LOD_Decimation_Info structure is updated
+ * to represent the new mesh.
+ * @return 1 if an edge was collapsed.
+ * @return 0 if no suitable edge was found to be collapsable
+ * You should stop calling this method in this case
+ * @warning Do not expect that the order of polygons, vertices or
+ * vertex normals will be preserved by this operation. This function
+ * returns a packed array of polygons and vertices and so necessarily
+ * the order will be different. This means you should not expect to
+ * find the same polygon in the same place in the polygon array after 
+ * this function has been called.
+ */
+
+extern int LOD_CollapseEdge(LOD_Decimation_InfoPtr info);
+
+/** 
+ * Free any memory the decimation process used 
+ * during the decimation process
+ * @return 1 if internal data successfully freed
+ * @return 0 if no data was freed
+ */
+
+extern int LOD_FreeDecimationData(LOD_Decimation_InfoPtr);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif // NAN_INCLUDED_LOD_decimation_h
+
+
+