Flex3学习轨迹：自定义缓动函数实现一个弹跳缓动动画

<?xml version="1.0" encoding="utf-8"?>
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" layout="vertical" fontSize="12">
<!-- 自定义缓动函数 -->
<mx:Script>
<![CDATA[
private function myEasingFunction(t:Number, b:Number,c:Number, d:Number):Number
{
if ((t /= d) < (1 / 2.75))
{
return c * (7.5625 * t * t) + b;
}
else if (t < (2 / 2.75))
{
return c * (7.5625 * (t-=(1.5/2.75)) * t + .75) + b;
}
else if (t < (2.5 / 2.75))
{
return c * (7.5625 * (t-=(2.25/2.75)) * t + .9375) + b;
}
else
{
return c * (7.5625 * (t-=(2.625/2.75)) * t + .984375) + b;
}
}
]]>
</mx:Script>
<!-- 定义WipeLeft效果 -->
<mx:WipeLeft id="wipeLeft" target="{image}" moveEasingFunction="myEasingFunction" duration="5000" />
<mx:Panel width="400" height="300" title="创建自定义缓动函数"
horizontalAlign="center">
<mx:ApplicationControlBar dock="true" width="100%">
<mx:Button label="执行效果" click="wipeLeft.play();" />
</mx:ApplicationControlBar>
<mx:Image id="image" source="assets/logo.jpg"/>
</mx:Panel>
</mx:Application>