From 3a89fc251055202ae8a7151871a36eea942b61c2 Mon Sep 17 00:00:00 2001
From: Ferix9288 <felix9288@gmail.com>
Date: Wed, 26 Jun 2019 18:49:07 -0700
Subject: [PATCH] fix panic issue if addition of 2 y coordinates is too big for
 FastCos

---
 distance.go | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/distance.go b/distance.go
index bbf7196..6bc99e6 100644
--- a/distance.go
+++ b/distance.go
@@ -45,7 +45,7 @@ func FastSine(x float64) float64 {
 // FastCos calculates cosinus from sinus
 func FastCos(x float64) float64 {
 	x += math.Pi / 2.0
-	if x > math.Pi {
+	for x > math.Pi {
 		x -= 2 * math.Pi
 	}