Bug 212371 [Regression] Auto-scale does not work correctly and gridline is not shown anymore when run the attached java file [13]
chart/org.eclipse.birt.chart.engine/src/org/eclipse/birt/chart/computation/withaxes/AutoScale.java
iType,
				dStart,
				dEnd,
				scModel,
				null,
				fs,
				rtc,
				direction,
				zoomFactor,
				iMarginPercent );
	}
	/**
	 * 
	 * @param xs
	 * @param ax
	 * @param dsi
	 * @param iType
	 * @param dStart
	 * @param dEnd
	 * @param scModel
	 * @param axisOrigin
	 * @param fs
	 * @param rtc
	 * @param direction
	 * @param zoomFactor
	 *            1 is default factor
	 * @param iMarginPercent
	 *            the percentage of margin area for display some charts, such as
	 *            bubble. 0 means no margin
	 * @return AutoScale instance