public void zoom(double magnification)
	{
		focalLength *= magnification;
//		double xInc = (magnification - 1)*(viewedPoint.getX() - viewPoint.getX());
//		double yInc = (magnification - 1)*(viewedPoint.getY() - viewPoint.getY());
//		double zInc = (magnification - 1)*(viewedPoint.getZ() - viewPoint.getZ());
//		viewPoint = viewPoint.translate(xInc, yInc, zInc);
	}