import aurelienribon.tweenengine.equations.Circ; //导入依赖的package包/类
/**
 * Takes an easing name and gives you the corresponding TweenEquation.
 * You probably won't need this, but tools will love that.
 *
 * @param easingName The name of an easing, like "Quad.INOUT".
 * @return The parsed equation, or null if there is no match.
 */
public static TweenEquation parseEasing(String easingName) {
	if (easings == null) {
		easings = new TweenEquation[] {Linear.INOUT,
			Quad.IN, Quad.OUT, Quad.INOUT,
			Cubic.IN, Cubic.OUT, Cubic.INOUT,
			Quart.IN, Quart.OUT, Quart.INOUT,
			Quint.IN, Quint.OUT, Quint.INOUT,
			Circ.IN, Circ.OUT, Circ.INOUT,
			Sine.IN, Sine.OUT, Sine.INOUT,
			Expo.IN, Expo.OUT, Expo.INOUT,
			Back.IN, Back.OUT, Back.INOUT,
			Bounce.IN, Bounce.OUT, Bounce.INOUT,
			Elastic.IN, Elastic.OUT, Elastic.INOUT
		};
	}

	for (int i=0; i<easings.length; i++) {
		if (easingName.equals(easings[i].toString()))
			return easings[i];
	}

	return null;
}