private void drawChordalAxis()
	{
		if(model.getChordalAxis()==null)
			return;
		ChordalAxis axis;
		if(!showPruned && !showSubdivided)
			axis = model.getChordalAxis();
		else
			axis = model.getPrunedChordalAxis();
		drawChordalAxis(axis);
		if(showRaisedAxis)
		{
			axis = model.getRaisedChordalAxis();
			drawChordalAxis(axis);
			drawDownwardLines(axis);
			axis = model.getLoweredChordalAxis();
			drawChordalAxis(axis);
			drawUpwardLines(axis);
		}
	}