From 36f1690120abbb1d38781569cfdb3b8157c3c1a5 Mon Sep 17 00:00:00 2001
From: Andrey Antukh <niwi@niwi.nz>
Date: Sat, 30 Jan 2016 20:18:51 +0200
Subject: [PATCH] Add distance function to math ns.

---
 src/uxbox/util/math.cljs | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/src/uxbox/util/math.cljs b/src/uxbox/util/math.cljs
index ecea5997d..fc34cdc1b 100644
--- a/src/uxbox/util/math.cljs
+++ b/src/uxbox/util/math.cljs
@@ -67,3 +67,11 @@
   "Converts radians to degrees."
   [^number radiants]
   (math/toDegrees radiants))
+
+(defn distance
+  "Calculate the distance between two points."
+  [[x1 y1] [x2 y2]]
+  (let [dx (- x1 x2)
+        dy (- y1 y2)]
+    (-> (sqrt (+ (pow dx 2) (pow dy 2)))
+        (precision 2))))