From 6e38d819bb543b7c92f821c1e7947ca2ec39295e Mon Sep 17 00:00:00 2001
From: ganovelli <fabio.ganovelli@isti.cnr.it>
Date: Tue, 9 Nov 2004 15:49:07 +0000
Subject: [PATCH] added GetUV

---
 vcg/space/point3.h | 30 +++++++++++++++++++++++++++++-
 1 file changed, 29 insertions(+), 1 deletion(-)

diff --git a/vcg/space/point3.h b/vcg/space/point3.h
index ed360b3e..fad39566 100644
--- a/vcg/space/point3.h
+++ b/vcg/space/point3.h
@@ -24,6 +24,9 @@
   History
 
 $Log: not supported by cvs2svn $
+Revision 1.18  2004/10/13 12:45:51  cignoni
+Better Doxygen documentation
+
 Revision 1.17  2004/09/10 14:01:40  cignoni
 Added polar to cartesian
 
@@ -88,7 +91,7 @@ protected:
 
 public:
 	typedef P3ScalarType ScalarType;
-
+	enum {Dimension = 3};
 	
 	
 //@{
@@ -456,6 +459,31 @@ P3ScalarType PSDist( const Point3<P3ScalarType> & p,
 }
 
 
+template <class P3ScalarType>
+void GetUV( Point3<P3ScalarType> &n,Point3<P3ScalarType> &u, Point3<P3ScalarType> &v, Point3<P3ScalarType> up=Point3<P3ScalarType>(0,1,0))
+{
+	n.Normalize();
+	const double LocEps=double(1e-7);
+	u=n^up;
+  double len = u.Norm();
+ 	if(len < LocEps)
+	{
+		if(fabs(n[0])<fabs(n[1])){
+			if(fabs(n[0])<fabs(n[2])) up=Point3<P3ScalarType>(1,0,0); // x is the min 
+			                         else up=Point3<P3ScalarType>(0,0,1); // z is the min 
+		}else {
+			if(fabs(n[1])<fabs(n[2])) up=Point3<P3ScalarType>(0,1,0); // y is the min 
+			                         else up=Point3<P3ScalarType>(0,0,1); // z is the min 
+		}
+		u=n^up;
+	}
+	u.Normalize();
+	v=n^u;
+	v.Normalize();
+	Point3<P3ScalarType> uv=u^v;
+}
+
+
 typedef Point3<short>  Point3s;
 typedef Point3<int>	   Point3i;
 typedef Point3<float>  Point3f;