Vector2 Fix for BouncingBall

Charles Petzold · Charles Petzold · commit 1b6933861e5e · 2016-11-23T16:27:48.000-05:00
diff --git a/Libraries/Xamarin.FormsBook.Toolkit/Xamarin.FormsBook.Toolkit/Vector2.cs b/Libraries/Xamarin.FormsBook.Toolkit/Xamarin.FormsBook.Toolkit/Vector2.cs
@@ -62,6 +62,11 @@ public static double AngleBetween(Vector2 v1, Vector2 v2)
             return 180 * (Math.Atan2(v2.Y, v2.X) - Math.Atan2(v1.Y, v1.X)) / Math.PI;
         }
 
+        public static double DotProduct(Vector2 v1, Vector2 v2)
+        {
+            return v1.X * v2.X + v1.Y * v2.Y;
+        }
+
         // Operators
         public static Vector2 operator +(Vector2 v1, Vector2 v2)
         {

Original file line number	Diff line number	Diff line change
`@@ -62,6 +62,11 @@ public static double AngleBetween(Vector2 v1, Vector2 v2)`
`62`	`62`	`return 180 * (Math.Atan2(v2.Y, v2.X) - Math.Atan2(v1.Y, v1.X)) / Math.PI;`
`63`	`63`	`}`
`64`	`64`
	`65`	`+ public static double DotProduct(Vector2 v1, Vector2 v2)`
	`66`	`+ {`
	`67`	`+ return v1.X * v2.X + v1.Y * v2.Y;`
	`68`	`+ }`
	`69`	`+`
`65`	`70`	`// Operators`
`66`	`71`	`public static Vector2 operator +(Vector2 v1, Vector2 v2)`
`67`	`72`	`{`