From 2a394a3652ae024d54078e93f4047f3fef970872 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Re=CC=81my=20Bouquet?= <remy.bouquet@gmail.com>
Date: Wed, 18 Jul 2018 12:40:10 +0200
Subject: [PATCH] Fixes 0 division when camera is aligne on the x axis

---
 sources/osgGA/OrbitManipulator.js | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/sources/osgGA/OrbitManipulator.js b/sources/osgGA/OrbitManipulator.js
index 7d776ed49..d1953005d 100644
--- a/sources/osgGA/OrbitManipulator.js
+++ b/sources/osgGA/OrbitManipulator.js
@@ -251,6 +251,9 @@ utils.createPrototypeObject(
 
             return function(dx, dy) {
                 var prevPitch = Math.atan(-this._rotation[6] / this._rotation[5]);
+                if (isNaN(prevPitch)) {
+                    prevPitch = 0.0;
+                }
                 var pitch = this._computePitch(prevPitch, dy);
 
                 var deltaYaw = dx / 10.0;