Updated the comments to be more relevant

git-svn-id: http://svn.openscenegraph.org/osg/OpenSceneGraph/trunk@14774 16af8721-9629-0410-8352-f15c8da7e697

examples/osgtexture3D/osgtexture3D.cpp

@@ -31,11 +31,9 @@
 #include <iostream>
 
 //
-// A simple demo demonstrating different texturing modes,
-// including using of texture extensions.
+// A simple demo demonstrating use osg::Texture3D to create a blended animation between four seperate images packed together into a 3d texture
 //
 
-
 typedef std::vector< osg::ref_ptr<osg::Image> > ImageList;
 
 osg::StateSet* createState()
@@ -176,27 +174,16 @@ osg::Drawable* createSquare(float textureCoordMax=1.0f)
 
 osg::Node* createModel()
 {
-
     // create the geometry of the model, just a simple 2d quad right now.
     osg::Geode* geode = new osg::Geode;
+
     geode->addDrawable(createSquare());
 
-    // normally we'd create the stateset's to contain all the textures
-    // etc here, but, the above technique uses osg::Image::scaleImage and
-    // osg::Image::copySubImage() which are implemented with OpenGL utility
-    // library, which unfortunately can't be used until we have a valid
-    // OpenGL context, and at this point in initilialization we don't have
-    // a valid OpenGL context, so we have to delay creation of state until
-    // there is a valid OpenGL context.  I'll manage this by using an
-    // app callback which will create the state during the first traversal.
-    // A bit hacky, and my plan is to reimplement the osg::scaleImage and
-    // osg::Image::copySubImage() without using GLU which will get round
-    // this current limitation.
     geode->setUpdateCallback(new UpdateStateCallback());
+
     geode->setStateSet(createState());
 
     return geode;
-
 }