From acf359777eb58b06c20d8843afd6fb261a347894 Mon Sep 17 00:00:00 2001
From: Daniel Emminizer <emminizer@enews.nrl.navy.mil>
Date: Thu, 14 Jun 2018 07:33:08 -0400
Subject: [PATCH] FLT: Missing optional attr files on textures no longer
 generates a console warning.

---
 src/osgPlugins/OpenFlight/PaletteRecords.cpp | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/src/osgPlugins/OpenFlight/PaletteRecords.cpp b/src/osgPlugins/OpenFlight/PaletteRecords.cpp
index 659736a4e..cdffe75af 100644
--- a/src/osgPlugins/OpenFlight/PaletteRecords.cpp
+++ b/src/osgPlugins/OpenFlight/PaletteRecords.cpp
@@ -344,8 +344,13 @@ protected:
         texture->setImage(image.get());
         stateset->setTextureAttributeAndModes(0, texture, osg::StateAttribute::ON);
 
-        // Read attribute file
+        // Since the .attr file is optional according to the OpenFlight spec, check to see
+        // if the file exists before reading it, to avoid printing an unnecessary warning.
         std::string attrname = filename + ".attr";
+        if (!osgDB::fileExists(attrname))
+            return stateset;
+
+        // Read optional attribute file
         osg::ref_ptr<AttrData> attr = osgDB::readRefFile<AttrData>(attrname,document.getOptions());
         if (attr.valid())
         {