Implement V3::Direction

include/J3ML/LinearAlgebra/Vector3.h

@@ -37,6 +37,11 @@ public:
         b = b.Normalize();
     }
 
+
+    //Returns the DirectionVector for a given angle.
+    Vector3 Direction(const Vector3 &rhs) const;
+
+
     static void Orthonormalize(Vector3& a, Vector3& b, Vector3& c)
     {
         a = a.Normalize();