static functions zero() an one() added to points

vcg/space/deprecated_point2.h

@@ -309,6 +309,16 @@ public:
     return Point2(b.X(),b.Y());
 	}
 
+	static inline Point2 Zero(void)
+    {
+      return Point2(0,0);
+    }
+
+    static inline Point2 One(void)
+    {
+      return Point2(1,1);
+    }
+
 
 }; // end class definition
 

vcg/space/deprecated_point3.h

@@ -208,6 +208,11 @@ public:
     return Point3(0,0,0);
   }
 
+  static inline Point3 One(void)
+  {
+    return Point3(1,1,1);
+  }
+
 //@}
 
 //@{

vcg/space/deprecated_point4.h

@@ -128,6 +128,16 @@ public:
     return Point4(T(b[0]),T(b[1]),T(b[2]),T(b[3]));
   }
 
+  static inline Point4 Zero(void)
+  {
+    return Point4(0,0,0,0);
+  }
+
+  static inline Point4 One(void)
+  {
+    return Point4(1,1,1,1);
+  }
+
 //@}
 
 //@{