question: public void initialize ( ) { TextureState ts = new TextureState ( ) ; ts . setEnabled ( false ) ; setRenderState ( ts ) ; for ( int i = 0 ; i < toolList . size ( ) ; ++ i ) { ToolState state = toolList . get ( i ) ; addTool ( state , false ) ; } zBufferState = new ZBufferState ( ) ; zBufferState . setFunction ( ZBufferState . TestFunction . LessThanOrEqualTo ) ; zBufferState . setEnabled ( true ) ; setRenderState ( zBufferState ) ; }
target:  Create and add the tools to the scene graph