From 88107edef1c3df6648eb771d46b59f900e691a74 Mon Sep 17 00:00:00 2001
From: cnr-isti-vclab <paolo.cignoni@isti.cnr.it>
Date: Thu, 17 Feb 2011 09:58:16 +0000
Subject: [PATCH] Added Shot::GetViewDir() method

---
 vcg/math/shot.h | 16 +++++++++++++---
 1 file changed, 13 insertions(+), 3 deletions(-)

diff --git a/vcg/math/shot.h b/vcg/math/shot.h
index 332225f9..3187fd2a 100644
--- a/vcg/math/shot.h
+++ b/vcg/math/shot.h
@@ -164,9 +164,11 @@ public:
 	/// GET the i-th axis of the coordinate system of the camera
 	vcg::Point3<S> Axis(const int & i)const;
 
-	/// GET the viewpoint
-	const vcg::Point3<S> GetViewPoint()const;
-	/// SET the viewpoint
+  /// GET the viewdir
+  const vcg::Point3<S> GetViewDir()const;
+  /// GET the viewpoint
+  const vcg::Point3<S> GetViewPoint()const;
+  /// SET the viewpoint
 	void SetViewPoint(const vcg::Point3<S> & viewpoint);
 
 	/// GET fov from focal
@@ -252,6 +254,14 @@ public:
 
 
 
+template <class S, class RotationType>
+const vcg::Point3<S> Shot<S,RotationType>::GetViewDir() const
+{
+  return  Extrinsics.Rot().GetRow3(2);
+}
+
+
+
 //---
 /// GET the viewpoint
 template <class S, class RotationType>