From 0775ed75ea67f75d06b1f59363bc8e5e2f09409b Mon Sep 17 00:00:00 2001
From: mrcheko <cheko@sevas.ua>
Date: Sat, 3 Sep 2016 17:41:03 +0300
Subject: [PATCH] fix zero div in getXAngleToDir

---
 apps/openmw/mwmechanics/pathfinding.cpp | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/apps/openmw/mwmechanics/pathfinding.cpp b/apps/openmw/mwmechanics/pathfinding.cpp
index ef60a85a4..85e120d18 100644
--- a/apps/openmw/mwmechanics/pathfinding.cpp
+++ b/apps/openmw/mwmechanics/pathfinding.cpp
@@ -89,7 +89,8 @@ namespace MWMechanics
 
     float getXAngleToDir(const osg::Vec3f& dir)
     {
-        return -std::asin(dir.z() / dir.length());
+        float dirLen = dir.length();
+        return (dirLen != 0) ? -std::asin(dir.z() / dirLen) : 0;
     }
 
     float getZAngleToPoint(const ESM::Pathgrid::Point &origin, const ESM::Pathgrid::Point &dest)
@@ -276,7 +277,7 @@ namespace MWMechanics
         const ESM::Pathgrid::Point &nextPoint = *mPath.begin();
         osg::Vec3f dir = MakeOsgVec3(nextPoint) - osg::Vec3f(x,y,z);
 
-        return -std::asin(dir.z() / dir.length());
+        return getXAngleToDir(dir);
     }
 
     bool PathFinder::checkPathCompleted(float x, float y, float tolerance)