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diff --git a/source/blender/include/BDR_isect.h b/source/blender/include/BDR_isect.h
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+++ b/source/blender/include/BDR_isect.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 *****
+ * Some geometrical operations (intersection and such).
+ */
+
+#ifndef BDR_ISECT_H
+#define BDR_ISECT_H
+
+
+struct EditVert;
+struct EditVlak;
+
+/** 
+ * Intersect a face and a linesegment 
+ *
+ * @param v1 Vertex 1 of the face
+ * @param v2 Vertex 2 of the face
+ * @param v3 Vertex 3 of the face
+ * @param v4 Point 1 on the line
+ * @param v5 Point 2 on the line
+ * @param vec Location of the intersection (if it exists)
+ * 
+ * @retval -1 colliniar
+ * @retval  0 no intersection
+ * @retval  1 exact intersection of edge and line
+ * @retval  2 cross-intersection
+ */
+short IsectFL(float *v1, float *v2, float *v3,                    
+			  float *v4, float *v5, float *vec);
+
+/** 
+ * Intersect two lines
+ *
+ * @param v1 Point 1 of line 1
+ * @param v2 Point 2 of line 1
+ * @param v3 Point 1 of line 2
+ * @param v4 Point 2 of line 2
+ * @param cox projection (?)
+ * @param coy projection (?)
+ * @param labda answer (?)
+ * @param mu answer (?)
+ * @param vec answer (?)
+ * 
+ * @retval -1 colliniar
+ * @retval  0 no intersection of segments
+ * @retval  1 exact intersection of segments
+ * @retval  2 cross-intersection of segments
+ */
+short IsectLL(float *v1, float *v2, float *v3, float *v4,
+			  short cox, short coy,
+			  float *labda, float *mu, float *vec);
+
+int count_comparevlak(struct EditVlak *vl1, struct EditVlak *vl2);
+void empty(void);
+void addisedge(float *vec, short* edflag,                          
+			   struct EditVlak *vl1, struct EditVlak *vl2,
+			   short tel);
+void oldedsort_andmake(struct EditVert **olded, int edcount, int proj);
+short maxco(float *v1, float *v2);
+void newfillvert(struct EditVert *v1);
+void addisfaces(struct EditVlak *evl);
+void intersect_mesh(void);        
+
+#endif /*  BDR_ISECT_H */