protected void initialize(){
  int iwidth=m_plotPanel.getWidth();
  int iheight=m_plotPanel.getHeight();
  m_osi=m_plotPanel.createImage(iwidth,iheight);
  Graphics m=m_osi.getGraphics();
  m.fillRect(0,0,iwidth,iheight);
}

protected void initialize ( ) { int iwidth = m_plotPanel . getWidth ( ) ; int iheight = m_plotPanel . getHeight ( ) ; m_osi = m_plotPanel . createImage ( iwidth , iheight ) ; Graphics m = m_osi . getGraphics ( ) ; m . fillRect ( 0 , 0 , iwidth , iheight ) ; }
set up the off screen bitmap for rendering to
