From 4d5df6dc9a220ba4754ac1ee0ed04afd7f7402fd Mon Sep 17 00:00:00 2001
From: Vitaly Ovchinnikov <vitaly.ovchinnikov@gmail.com>
Date: Thu, 11 Feb 2016 12:19:06 +1300
Subject: [PATCH] use NormalizeSafe to prevent NaN when normalizing zero
 vectors

---
 code/SmoothingGroups.inl | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/code/SmoothingGroups.inl b/code/SmoothingGroups.inl
index 4f072ad1a..42c500070 100644
--- a/code/SmoothingGroups.inl
+++ b/code/SmoothingGroups.inl
@@ -119,7 +119,7 @@ void ComputeNormalsWithSmoothingsGroups(MeshWithSmoothingGroups<T>& sMesh)
             {
                 vNormals += sMesh.mNormals[(*a)];
             }
-            vNormals.Normalize();
+            vNormals.NormalizeSafe();
 
             // write back into all affected normals
             for (std::vector<unsigned int>::const_iterator