From a73e9250ee1545bc9df5e7ac852cb2485fc5605f Mon Sep 17 00:00:00 2001
From: Robert Osfield <robert@openscenegraph.com>
Date: Wed, 15 Nov 2006 20:29:28 +0000
Subject: [PATCH] Added alpha test setting

---
 examples/osgvolume/osgvolume.cpp | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/examples/osgvolume/osgvolume.cpp b/examples/osgvolume/osgvolume.cpp
index 1466683ba..112473851 100644
--- a/examples/osgvolume/osgvolume.cpp
+++ b/examples/osgvolume/osgvolume.cpp
@@ -731,6 +731,8 @@ osg::Node* createShaderModel(osg::ref_ptr<osg::Image>& image_3d, osg::ref_ptr<os
     osg::StateSet* stateset = geode->getOrCreateStateSet();
     
     stateset->setEventCallback(new FollowMouseCallback);
+    
+    stateset->setMode(GL_ALPHA_TEST,osg::StateAttribute::ON);
 
     // set up the 3d texture itself,
     // note, well set the filtering up so that mip mapping is disabled,