From 614a5fec168ab2ae456ca4cbdf7d7425c8dbff32 Mon Sep 17 00:00:00 2001
From: nicopietroni <nico.pietroni@isti.cnr.it>
Date: Fri, 22 Jun 2012 14:25:35 +0000
Subject: [PATCH] first release version

---
 vcg/space/distance2.h | 62 +++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 62 insertions(+)
 create mode 100644 vcg/space/distance2.h

diff --git a/vcg/space/distance2.h b/vcg/space/distance2.h
new file mode 100644
index 00000000..06baf919
--- /dev/null
+++ b/vcg/space/distance2.h
@@ -0,0 +1,62 @@
+/****************************************************************************
+* 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.                                                         *
+*                                                                           *
+****************************************************************************/
+/****************************************************************************/
+
+#ifndef __VCG_DISTANCE2
+#define __VCG_DISTANCE2
+
+#include <limits>
+#include <vcg/space/segment2.h>
+#include <vcg/space/intersection2.h>
+
+namespace vcg {
+
+	/*
+	* Computes the minimum distance between a two segments
+	* @param[in] S0				The input segment0
+	* @param[in] S1				The input segment1
+	* return the distance between the two segments
+	*/
+	template<class ScalarType>
+	ScalarType Segment2DSegment2DDistance(const vcg::Segment2<ScalarType> &S0,
+									const vcg::Segment2<ScalarType> &S1,
+									vcg::Point2<ScalarType> &p_clos)
+	{
+		///first test if they intersect
+		if (vcg:: SegmentSegmentIntersection(S0,S1,p_clos))return 0;
+		vcg::Point2<ScalarType> Pclos0=ClosestPoint(S0,S1.P0());
+		vcg::Point2<ScalarType> Pclos1=ClosestPoint(S0,S1.P1());
+		vcg::Point2<ScalarType> Pclos2=ClosestPoint(S1,S0.P0());
+		vcg::Point2<ScalarType> Pclos3=ClosestPoint(S1,S0.P1());
+		ScalarType d0=(Pclos0-S1.P0()).Norm();
+		ScalarType d1=(Pclos1-S1.P1()).Norm();
+		ScalarType d2=(Pclos2-S0.P0()).Norm();
+		ScalarType d3=(Pclos3-S0.P1()).Norm();
+		///then return the minimuim distance
+		return (std::min(d0,std::min(d1,std::min(d2,d3))));
+	}
+
+
+}///end namespace vcg
+
+#endif