From f97759405a6b3d19caeb745d6c16dbe87b2f9a50 Mon Sep 17 00:00:00 2001
From: Robert Osfield <robert@openscenegraph.com>
Date: Mon, 2 Oct 2006 14:11:40 +0000
Subject: [PATCH] From Farshid Lashkari, "Here is the patch we discussed
 previously about adding a flag to CullSettings which allows CameraNode to
 inherit the clear color."

---
 include/osg/CullSettings    | 1 +
 src/osgUtil/CullVisitor.cpp | 9 ++++++++-
 2 files changed, 9 insertions(+), 1 deletion(-)

diff --git a/include/osg/CullSettings b/include/osg/CullSettings
index 63a509043..95bf9f108 100644
--- a/include/osg/CullSettings
+++ b/include/osg/CullSettings
@@ -70,6 +70,7 @@ class OSG_EXPORT CullSettings
             CULL_MASK                               = 0x0400,
             CULL_MASK_LEFT                          = 0x0800,
             CULL_MASK_RIGHT                         = 0x1000,
+            CLEAR_COLOR                             = 0x2000,
             
             NO_VARIABLES                            = 0x0000,
             ALL_VARIABLES                           = 0xFFFF
diff --git a/src/osgUtil/CullVisitor.cpp b/src/osgUtil/CullVisitor.cpp
index 1555523fc..666d51aea 100644
--- a/src/osgUtil/CullVisitor.cpp
+++ b/src/osgUtil/CullVisitor.cpp
@@ -1151,7 +1151,14 @@ void CullVisitor::apply(osg::CameraNode& camera)
 
 
         // set up the background color and clear mask.
-        rtts->setClearColor(camera.getClearColor());
+        if (camera.getInheritanceMask() & CLEAR_COLOR)
+        {
+            rtts->setClearColor(camera.getClearColor());
+        }
+        else
+        {
+            rtts->setClearColor(previous_stage->getClearColor());
+        }
         rtts->setClearMask(camera.getClearMask());
         
         // set the color mask.