From 0e1f5f68b6947eb11d713208ca2a6b0281ba9bcb Mon Sep 17 00:00:00 2001
From: Andrei Kortunov <andrei.kortunov@yandex.ru>
Date: Thu, 21 Mar 2019 08:52:13 +0400
Subject: [PATCH] Do not allow different threads to compile the same composite
 map

---
 components/terrain/compositemaprenderer.cpp | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/components/terrain/compositemaprenderer.cpp b/components/terrain/compositemaprenderer.cpp
index 355ef6c16f..ee4a66fcde 100644
--- a/components/terrain/compositemaprenderer.cpp
+++ b/components/terrain/compositemaprenderer.cpp
@@ -70,14 +70,17 @@ void CompositeMapRenderer::drawImplementation(osg::RenderInfo &renderInfo) const
     while (!mCompileSet.empty() && timeLeft > 0)
     {
         osg::ref_ptr<CompositeMap> node = *mCompileSet.begin();
+        mCompileSet.erase(node);
 
         mMutex.unlock();
         compile(*node, renderInfo, &timeLeft);
         mMutex.lock();
 
-        if (node->mCompiled >= node->mDrawables.size())
+        if (node->mCompiled < node->mDrawables.size())
         {
-            mCompileSet.erase(node);
+            // We did not compile the map fully.
+            // Place it back to queue to continue work in the next time.
+            mCompileSet.insert(node);
         }
     }
     mTimer.setStartTick();