From bb84f1ea3c23625a645b9c2848202bca7c566efb Mon Sep 17 00:00:00 2001
From: "Konstantin S. Matveyev" <root@zorro.ev>
Date: Sat, 13 Jan 2018 15:46:53 +0300
Subject: [PATCH] osgViewer::ViewerBase setThreadingModel func fix: should not
 start threading, must only restart

---
 src/osgViewer/ViewerBase.cpp | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/osgViewer/ViewerBase.cpp b/src/osgViewer/ViewerBase.cpp
index 4b72f5c20..f5b325895 100644
--- a/src/osgViewer/ViewerBase.cpp
+++ b/src/osgViewer/ViewerBase.cpp
@@ -205,11 +205,13 @@ void ViewerBase::setThreadingModel(ThreadingModel threadingModel)
 {
     if (_threadingModel == threadingModel) return;
 
+    bool needSetUpThreading = _threadsRunning;
+
     if (_threadsRunning) stopThreading();
 
     _threadingModel = threadingModel;
 
-    setUpThreading();
+    if (needSetUpThreading) setUpThreading();
 }
 
 ViewerBase::ThreadingModel ViewerBase::suggestBestThreadingModel()