From e9e7f100f84428a8f958c48fbaf0b2e58d942116 Mon Sep 17 00:00:00 2001
From: David Manthey <david.manthey@kitware.com>
Date: Mon, 5 Dec 2016 13:11:53 -0500
Subject: [PATCH] Older versions of firefox can use trig functions with
 constant arguments as a constant.

---
 src/gl/lineFeature.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/gl/lineFeature.js b/src/gl/lineFeature.js
index ecc7a731f1..8482ca8f57 100644
--- a/src/gl/lineFeature.js
+++ b/src/gl/lineFeature.js
@@ -103,7 +103,7 @@ var gl_lineFeature = function (arg) {
           'varying vec4 info;',  /* near mode, far mode, offset */
           'varying vec4 angles;', /* near angle cos, sin, far angle cos, sin */
 
-          'const float PI = acos(-1.0);',
+          'const float PI = 3.14159265358979323846264;',
 
           'void main(void)',
           '{',