diff --git a/vcg/space/ray2.h b/vcg/space/ray2.h
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+/****************************************************************************
+* VCGLib                                                            o o     *
+* Visual and Computer Graphics Library                            o     o   *
+*                                                                _   O  _   *
+* Copyright(C) 2004                                                \/)\/    *
+* Visual Computing Lab                                            /\/|      *
+* ISTI - Italian National Research Council                           |      *
+*                                                                    \      *
+* All rights reserved.                                                      *
+*                                                                           *
+* 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 (http://www.gnu.org/licenses/gpl.txt)          *
+* for more details.                                                         *
+*                                                                           *
+****************************************************************************/
+/****************************************************************************
+  History
+
+$Log: not supported by cvs2svn $
+
+****************************************************************************/
+
+
+
+#ifndef __VCGLIB_RAY2
+#define __VCGLIB_RAY2
+
+#include <vcg/space/point2.h>
+
+namespace vcg {
+
+/** \addtogroup space */
+/*@{*/
+/** 
+Templated class for 3D rays.
+  This is the class for infinite rays in 3D space. A Ray is stored just as two Point3:
+	an origin and a direction (not necessarily normalized).
+	@param RayScalarType (template parameter) Specifies the type of scalar used to represent coords.
+	@param NORM: if on, the direction is always Normalized
+*/
+template <class RayScalarType, bool NORM=false>
+class Ray2
+{
+public: 
+
+	/// The scalar type
+	typedef RayScalarType ScalarType;
+
+	/// The point type
+	typedef Point2<RayScalarType> PointType;
+
+	/// The ray type
+	typedef Ray2<RayScalarType,NORM> RayType;
+
+private:
+
+	/// Origin
+	PointType _ori;
+
+	/// Direction (not necessarily normalized, unless so specified by NORM)
+	PointType _dir;
+
+public:
+
+//@{
+	 /** @name Members to access the origin or direction
+	   Direction() cannot be assigned directly.
+		 Use SetDirection() or Set() instead.
+	**/
+		/// 
+  inline const PointType &Origin() const { return _ori; } 
+  inline PointType &Origin() { return _ori; } 
+  inline const PointType &Direction() const { return _dir; } 
+		/// sets the origin
+	inline void SetOrigin( const PointType & ori )
+	{	_ori=ori; }
+		/// sets the direction
+	inline void SetDirection( const PointType & dir)
+	{	_dir=dir; if (NORM) _dir.Normalize();  }
+		/// sets origin and direction.
+	inline void Set( const PointType & ori, const PointType & dir )
+	{	SetOrigin(ori); SetDirection(dir); }
+//@}
+
+//@{
+	 /** @name Constructors 
+	**/
+ 		/// The empty constructor
+	Ray2() {};
+		/// The (origin, direction) constructor
+	Ray2(const PointType &ori, const PointType &dir) {SetOrigin(ori); SetDirection(dir);};
+//@}
+
+		/// Operator to compare two rays
+	inline bool operator == ( RayType const & p ) const
+	{	return _ori==p._ori && _dir==p._dir; }
+		/// Operator to dispare two rays
+	inline bool operator != ( RayType const & p ) const
+	{	return _ori!=p._ori || _dir!=p._dir; }
+		/// Projects a point on the ray
+	inline ScalarType Projection( const  PointType &p ) const
+	{ if (NORM) return ScalarType((p-_ori)*_dir); 
+		else      return ScalarType((p-_ori)*_dir/_dir.SquaredNorm()); 
+	}
+	  /// returns wheter this type is normalized or not
+	static bool IsNormalized() {return NORM;};
+	  /// calculates the point of parameter t on the ray.
+	inline PointType P( const ScalarType t ) const
+	{ return _ori + _dir * t; }
+		/// normalizes direction field (returns a Normalized Ray)
+	inline Ray2<ScalarType,true> &Normalize()
+	{ if (!NORM) _dir.Normalize(); return *((Ray2<ScalarType,true>*)this);}
+		/// normalizes direction field (returns a Normalized Ray) - static version
+	static Ray2<ScalarType,true> &Normalize(RayType &p)
+	{ p.Normalize(); return *((Ray2<ScalarType,true>*)(&p));}
+	  /// importer for different ray types (with any scalar type or normalization beaviour)
+	template <class Q, bool K>
+	inline void Import( const Ray2<Q,K> & b )
+	{ _ori.Import( b.Origin() );	_dir.Import( b.Direction() ); 
+	  if ((NORM) && (!K)) _dir.Normalize(); 
+		//printf("(=)%c->%c ",(!NORM)?'N':'n', NORM?'N':'n');
+	}
+		/// constructs a new ray importing it from an existing one
+	template <class Q, bool K>
+	static RayType Construct( const Ray2<Q,K> & b )
+	{ RayType res; res.Import(b);  return res;
+	}	
+	PointType ClosestPoint(const PointType & p) const{
+	return P(Projection(p));
+	}
+	  /// flips the ray
+	inline void Flip(){
+		_dir=-_dir;
+	};
+
+//@{
+	 /** @name Linearity for 3d rays 
+   (operators +, -, *, /) so a ray can be set as a linear combination
+	 of several rays. Note that the result of any operation returns 
+	 a non-normalized ray; however, the command r0 = r1*a + r2*b is licit 
+	 even if r0,r1,r2 are normalized rays, as the normalization will
+	 take place within the final assignement operation. 
+	**/
+	inline Ray2<ScalarType,false> operator + ( RayType const & p) const
+	{return Ray2<ScalarType,false> ( _ori+p.Origin(), _dir+p.Direction() );}
+	inline Ray2<ScalarType,false> operator - ( RayType const & p) const
+	{return Ray2<ScalarType,false> ( _ori-p.Origin(), _dir-p.Direction() );}
+	inline Ray2<ScalarType,false> operator * ( const ScalarType s ) const
+	{return Ray2<ScalarType,false> ( _ori*s, _dir*s );}
+	inline Ray2<ScalarType,false> operator / ( const ScalarType s ) const
+	{ScalarType s0=((ScalarType)1.0)/s; return RayType( _ori*s0, _dir*s0 );}
+//@}
+
+
+//@{
+	 /** @name Automatic normalized to non-normalized
+	 "Ray2dN r0 = r1" is equivalent to
+	 "Ray2dN r0 = r1.Normalize()" if r1 is a Ray2d
+	**/
+		/// copy constructor that takes opposite beaviour
+	Ray2(const Ray2<ScalarType,!NORM > &r) 
+	{ Import(r); };
+		/// assignment
+	inline RayType & operator = ( Ray2<ScalarType,!NORM> const &r) 
+	{ Import(r); return *this; };
+//@}
+
+}; // end class definition
+
+typedef Ray2<short>  Ray2s;
+typedef Ray2<int>    Ray2i;
+typedef Ray2<float>  Ray2f;
+typedef Ray2<double> Ray2d;
+
+typedef Ray2<short ,true> Ray2sN;
+typedef Ray2<int   ,true> Ray2iN;
+typedef Ray2<float ,true> Ray2fN;
+typedef Ray2<double,true> Ray2dN;
+
+	  /// returns closest point
+template <class ScalarType, bool NORM> 
+Point3<ScalarType> ClosestPoint( Ray2<ScalarType,NORM> r, const Point3<ScalarType> & p) 
+{
+	ScalarType t = r.Projection(p); 
+	if (t<0) return r.Origin();
+	return r.P(t); 
+}
+
+/*@}*/
+
+} // end namespace
+#endif