AnimationCurve.EaseInOut 淡入淡出
static function EaseInOut (timeStart : float, valueStart : float, timeEnd : float, valueEnd : float) : AnimationCurve
Description描述
An ease-in and out curve starting at timeStart, valueStart and ending at timeEnd, valueEnd.
一个渐入渐出的曲线, 开始于timeStart, valueStart 终止于 timeEnd, valueEnd
