From 5e2a1e5df90686a39f617e79af0e138ff476079e Mon Sep 17 00:00:00 2001
From: liabru <liambrum@gmail.com>
Date: Thu, 24 Apr 2014 12:19:52 +0100
Subject: [PATCH] added Vector.angle

---
 src/geometry/Vector.js | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/src/geometry/Vector.js b/src/geometry/Vector.js
index 628709e..924fbae 100644
--- a/src/geometry/Vector.js
+++ b/src/geometry/Vector.js
@@ -163,4 +163,15 @@ var Vector = {};
         return { x: -vector.x, y: -vector.y };
     };
 
+    /**
+     * Returns the angle in radians between the two vectors relative to the x-axis
+     * @method angle
+     * @param {vector} vectorA
+     * @param {vector} vectorB
+     * @return {number} The angle in radians
+     */
+    Vector.angle = function(vectorA, vectorB) {
+        return Math.atan2(vectorB.y - vectorA.y, vectorB.x - vectorA.x);
+    };
+
 })();
\ No newline at end of file