From b17d165d0c13ea1d7fccf84ee20fba07e27f6738 Mon Sep 17 00:00:00 2001
From: dibenedetto <marco.dibenedetto@isti.cnr.it>
Date: Tue, 6 Oct 2009 16:22:35 +0000
Subject: [PATCH] Added SquaredDistance and made the point-plane version
 redirect to the plane-point one.

---
 vcg/space/plane3.h | 22 +++++++++++++++++-----
 1 file changed, 17 insertions(+), 5 deletions(-)

diff --git a/vcg/space/plane3.h b/vcg/space/plane3.h
index 35f25bc0..046b4a85 100644
--- a/vcg/space/plane3.h
+++ b/vcg/space/plane3.h
@@ -174,14 +174,26 @@ public:
 typedef Plane3<float>  Plane3f;
 typedef Plane3<double> Plane3d;
 
-///Distance plane - point (Move this function to somewhere else)
-template<class T> T Distance(const Plane3<T> &plane, const Point3<T> &point) {   
+///Distance plane - point and vv. (Move these function to somewhere else)
+template<class T> T Distance(const Plane3<T> & plane, const Point3<T> & point)
+{
 	return plane.Direction().dot(point) - plane.Offset();
 }
 
-	///Distance point-plane (Move this function to somewhere else)
-template<class T> T Distance(const Point3<T> &point, const Plane3<T> &plane) {
-  return plane.Direction().dot(point) - plane.Offset();
+template<class T> T SquaredDistance(const Plane3<T> & plane, const Point3<T> & point)
+{
+	const T d = Distance(plane, point);
+	return (d * d);
+}
+
+template<class T> T Distance(const Point3<T> & point, const Plane3<T> & plane)
+{
+	return Distance(plane, point);
+}
+
+template<class T> T SquaredDistance(const Point3<T> & point, const Plane3<T> & plane)
+{
+	return SquaredDistance(plane, point);
 }
 
 } // end namespace