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diff --git a/source/kernel/gen_system/GEN_Matrix4x4.h b/source/kernel/gen_system/GEN_Matrix4x4.h
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+++ b/source/kernel/gen_system/GEN_Matrix4x4.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 GEN_MATRIX4X4
+#define GEN_MATRIX4X4
+
+#include "MT_Point3.h"
+
+class GEN_Matrix4x4
+{
+public:
+	// creators.
+	GEN_Matrix4x4();
+	GEN_Matrix4x4(const float value[4][4]);
+	GEN_Matrix4x4(const double value[16]);
+	GEN_Matrix4x4(const GEN_Matrix4x4 & other);
+	GEN_Matrix4x4(const MT_Point3& orig,
+				  const MT_Vector3& dir,
+				  const MT_Vector3 up);
+
+	void Identity();
+	void SetMatrix(const GEN_Matrix4x4 & other);
+	double*	getPointer();
+	const double* getPointer() const;
+	void setElem(int pos,double newvalue);
+
+	
+	MT_Vector3	GetRight() const;
+	MT_Vector3	GetUp() const;
+	MT_Vector3	GetDir() const;
+	MT_Point3	GetPos() const;
+	void		SetPos(const MT_Vector3 & v);
+
+	double& operator () (int row,int col)	{ return m_V[col][row]; }
+	
+	static GEN_Matrix4x4 Perspective(MT_Scalar inLeft,
+									 MT_Scalar inRight,
+									 MT_Scalar inBottom,
+									 MT_Scalar inTop,
+									 MT_Scalar inNear,
+									 MT_Scalar inFar);
+protected:
+	union
+	{
+		double m_V[4][4];
+		double m_Vflat[16];
+	};
+};
+
+#endif //GEN_MATRIX4X4