如何实现像http://www.bcaa.it/

Question

字符串效果我想做一个像这个网站的字符串效果http://www.bcaa.it/ 我可以学习什么样的脚本或教程？

基本上我想实现与网站相同。有弹跳的字符串效果，拖动项目，并远离其他项目，靠近它，拖动和子对象后跟缓动...

Answer 1

嘿刚开始编码这个，需要类似的图形显示我工作。这里是我的开始，只是两个按钮，但这个想法可以外推/优化：

<?xml version="1.0" encoding="utf-8"?> 
<s:WindowedApplication xmlns:fx="http://ns.adobe.com/mxml/2009" 
         xmlns:s="library://ns.adobe.com/flex/spark" 
         xmlns:mx="library://ns.adobe.com/flex/mx" 
         creationComplete="windowedapplication1_creationCompleteHandler(event)"> 

    <fx:Script> 
     <![CDATA[ 
      import mx.events.FlexEvent; 

      private var optimalDistanceUpdateTimer:Timer; 

      private var optimalDistance:Number = 100; 

      private var objectUserGrabbed:Button; 

      private var delayDenominator:Number = 6; 

      protected function button1_mouseDownHandler(event:MouseEvent):void 
      { 
       objectUserGrabbed = event.target as Button; 
       objectUserGrabbed.startDrag(); 
      } 

      protected function button1_mouseUpHandler(event:MouseEvent):void 
      { 
       objectUserGrabbed.stopDrag(); 
      } 

      protected function windowedapplication1_creationCompleteHandler(event:FlexEvent):void 
      { 
       optimalDistanceUpdateTimer = new Timer(33); 
       optimalDistanceUpdateTimer.addEventListener(TimerEvent.TIMER, optimalDistanceTickedHandler); 
       optimalDistanceUpdateTimer.start(); 
      } 
      private function optimalDistanceTickedHandler(event:TimerEvent):void 
      { 
       var targetPoint:Point; 
       var deltaX:Number; 
       var deltaY:Number; 

       if(!objectUserGrabbed) 
        return; 

       if(objectUserGrabbed == button1) 
       { 
        //Basically here I'm playing of Pythagorean theorem for a 45 degree triangle the x component and the y component are the distance of the hypotenuse over Sqrt(2) for different offsets, radially you'd need to adjust this to compute the target point for each object... would do something like var angleForEach:Number = 360/numObjects; then figure out the target point for each of the objects in a loop var angleForThis = angleForEach*index; (in this example only two objects, no loop needed) 
        targetPoint = new Point(objectUserGrabbed.x-optimalDistance/Math.SQRT2, objectUserGrabbed.y-optimalDistance/Math.SQRT2); 


        deltaX = (targetPoint.x-button2.x); 
        deltaY = (targetPoint.y-button2.y); 

        button2.move(button2.x+deltaX/delayDenominator, button2.y+deltaY/delayDenominator); 
       } 
       else 
       { 
        targetPoint = new Point(objectUserGrabbed.x+optimalDistance/Math.SQRT2, objectUserGrabbed.y + optimalDistance/Math.SQRT2); 

        deltaX = (targetPoint.x-button1.x); 
        deltaY = (targetPoint.y-button1.y); 

        button1.move(button1.x+deltaX/delayDenominator, button1.y+deltaY/delayDenominator); 
       } 
       lineDrawingArea.graphics.clear(); 
       lineDrawingArea.graphics.lineStyle(1); 
       lineDrawingArea.graphics.moveTo(button1.x + button1.width/2,button1.y + button1.height/2); 
       lineDrawingArea.graphics.lineTo(button2.x + button2.width/2,button2.y + button2.height/2); 
      } 
     ]]> 
    </fx:Script> 

    <fx:Declarations> 
     <!-- Place non-visual elements (e.g., services, value objects) here --> 
    </fx:Declarations> 
    <s:Group id="lineDrawingArea"/> 
    <s:Button id="button1" label="Item 1" mouseDown="button1_mouseDownHandler(event)" mouseUp="button1_mouseUpHandler(event)" x="0" y="0"/> 
    <s:Button id="button2" label="Item 2" mouseDown="button1_mouseDownHandler(event)" mouseUp="button1_mouseUpHandler(event)" x="0" y="0"/> 
</s:WindowedApplication>