//Set up the GUI.
	GLCapabilities caps = new GLCapabilities();
	Canvas cvs = null;
	GLDrawableFactory gldf = GLDrawableFactory.getFactory();
	if(gldf instanceof SunJDK13GLDrawableFactory)
	{
		SunJDK13GLDrawableFactory sgldf = 
			(SunJDK13GLDrawableFactory)gldf;
		GraphicsConfiguration grcfg = 
			sgldf.getGraphicsConfiguration(caps);
		cvs = new Canvas (grcfg);
	} else {
		cvs = new Canvas ();
	}
	cvs.