From d1453a41c20b2430c8e6a0ed42f973d0a8fcde77 Mon Sep 17 00:00:00 2001
From: "Konstantin S. Matveyev" <root@zorro.ev>
Date: Tue, 22 Aug 2017 10:12:36 +0300
Subject: [PATCH] Geometry::compileGLObjects function VAO fix

---
 src/osg/Geometry.cpp | 13 ++++++++-----
 1 file changed, 8 insertions(+), 5 deletions(-)

diff --git a/src/osg/Geometry.cpp b/src/osg/Geometry.cpp
index 5fe643a88..aff29211b 100644
--- a/src/osg/Geometry.cpp
+++ b/src/osg/Geometry.cpp
@@ -791,6 +791,9 @@ void Geometry::compileGLObjects(RenderInfo& renderInfo) const
             if ((*itr)->getBufferObject()) bufferObjects.insert((*itr)->getBufferObject());
         }
 
+        if (bufferObjects.empty())
+            return; // no buffers, nothing to compile
+
         //osg::ElapsedTime timer;
 
         // now compile any buffer objects that require it.
@@ -808,11 +811,7 @@ void Geometry::compileGLObjects(RenderInfo& renderInfo) const
 
         // OSG_NOTICE<<"Time to compile "<<timer.elapsedTime_m()<<"ms"<<std::endl;
 
-        // unbind the BufferObjects
-        extensions->glBindBuffer(GL_ARRAY_BUFFER_ARB,0);
-        extensions->glBindBuffer(GL_ELEMENT_ARRAY_BUFFER_ARB,0);
-
-        if (state.useVertexArrayObject(_useVertexArrayObject) && !bufferObjects.empty())
+        if (state.useVertexArrayObject(_useVertexArrayObject))
         {
             VertexArrayState* vas = 0;
 
@@ -826,6 +825,10 @@ void Geometry::compileGLObjects(RenderInfo& renderInfo) const
 
             state.unbindVertexArrayObject();
         }
+
+        // unbind the BufferObjects
+        extensions->glBindBuffer(GL_ARRAY_BUFFER_ARB,0);
+        extensions->glBindBuffer(GL_ELEMENT_ARRAY_BUFFER_ARB,0);
     }
     else
     {