From f179d1caa6541fbf098563f78beda83fa9da8e48 Mon Sep 17 00:00:00 2001
From: mtarini <marco.tarini@isti.cnr.it>
Date: Mon, 8 Mar 2004 16:15:48 +0000
Subject: [PATCH] first version (tarini)

---
 vcg/space/line3.h | 117 ++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 117 insertions(+)
 create mode 100644 vcg/space/line3.h

diff --git a/vcg/space/line3.h b/vcg/space/line3.h
new file mode 100644
index 00000000..4e99cf5f
--- /dev/null
+++ b/vcg/space/line3.h
@@ -0,0 +1,117 @@
+/****************************************************************************
+* 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_LINE3
+#define __VCGLIB_LINE3
+
+#include <vcg/space/point3.h>
+
+namespace vcg {
+
+/** \addtogroup space */
+/*@{*/
+/** 
+Templated class for 3D lines.
+  This is the class for infinite lines in 3D space. A Line is stored just as two Point3:
+	an origin and a direction (not necessarily normalized).
+	@param LineScalarType (template parameter) Specifies the type of scalar used to represent coords.
+*/
+template <class LineScalarType >
+class Line3
+{
+public: 
+
+	/// The scalar type
+	typedef LineScalarType ScalarType;
+
+	/// The point type
+	typedef Point3<LineScalarType> PointType;
+
+	/// The point type
+	typedef Line3<LineScalarType> LineType;
+
+private:
+
+	/// Origin
+	PointType _ori;
+
+	/// Direction (not necessarily normalized)
+	PointType _dir;
+
+public:
+
+		/// Members to access the origin, direction
+  inline const PointType &Ori() const { return _ori; } 
+  inline const PointType &Dir() const { return _dir; } 
+  inline PointType &Ori() { return _ori; } 
+  inline PointType &Dir() { return _dir; } 
+
+		/// The empty constructor
+	Line3() {};
+		/// The (origin, direction) constructor
+	LineType(const PointType &ori, const PointType &dir) { _ori=ori; _dir=dir; };
+		/// Operator to compare two bounding box
+	inline bool operator == ( LineType const & p ) const
+	{	return _ori==p._ori && _dir==p._dir; }
+		/// Operator to dispare two bounding box
+	inline bool operator != ( LineType const & p ) const
+	{	return _ori!=p._ori || _dir!=p._dir; }
+		/// initializes the bounding box
+	inline PointType Projection( const  PointType &p ) const
+	{ ScalarType l = dire.SquaredNorm();
+		return ScalarType((p-_ori)*_dir/l); }
+		///set up of the line.
+	void Set( const PointType & ori, const PointType & dir )
+	{	_ori = ori; _dir=dir }
+	  /// calculates the point of parameter t on the line.
+	inline PointType P( const ScalarType t ) const
+	{ return orig + dire * t; }
+		/// normalizes direction field
+	LineType &Normalize()
+	{ _dir.Normalize(); return *this;}
+	static LineType &Normalize(LineType &p)
+	{ p.Normalize(); return p;}
+
+}; // end class definition
+
+
+
+typedef Line3<short>  Line3s;
+typedef Line3<int>	  Line3i;
+typedef Line3<float>  Line3f;
+typedef Line3<double> Line3d;
+
+
+/*@}*/
+
+} // end namespace
+#endif
\ No newline at end of file