利用Tweener製作動畫 – 數大便是美
套用徐志摩的名言:「數大」便是美,意思是說數量多就是美,不過雖然數大便是美,但如果要針對多個元件製作動畫,那利用程式一定會比手工來的輕鬆,甚至可以更漂亮和壯觀,以下的範例就是利用Tweener針對較多的元件來製作動畫的結果,分享給大家參考!希望各位未來不會「數大」便是累。
Tweener 滿天星斗:利用Tweener針對星形製作Alpha動畫,是一個很簡單的範例。
import caurina.transitions.Tweener import flash.display.MovieClip; setInterval(starFn,50) function starFn(){ var scale:Number=Math.random() var mc:MovieClip=new star mc.x=Math.random()*500 mc.y=Math.random()*500 mc.scaleX=scale mc.scaleY=scale mc.alpha=0 addChild(mc) Tweener.addTween(mc, {alpha:1, time:7, transition:"linear"}); Tweener.addTween(mc, {alpha:0, time:3,delay:8, transition:"linear"}); }
Tweener 擴散效果:利用Tweener針對球體來製作動畫,其中還應用到距離計算的Class,可以試著調整參數(彈出距離變數、彈出數量…等)來觀察改變的情況。
import flash.display.Sprite; import roMc; import flash.geom.Point; import caurina.transitions.Tweener; //變數定義區塊 var centerPoint:Point = new Point ;//圓形中心點 var i:int = 1;//迴圈變數 var radius:int = 50;//彈出距離變數 var no:int = 20;//彈出數量 var circleArray:Array=new Array//球體陣列(針對移除使用) var sec:int=1//動畫秒數 var hold:Number=0.1//延遲秒數 centerPoint.x = stage.stageWidth / 2; centerPoint.y = stage.stageHeight / 2; stage.addEventListener(MouseEvent.CLICK,clickFn); function clickFn(e:MouseEvent) { while (circleArray.length > 0) { removeChild(circleArray.pop()); } Tweener.removeAllTweens(); showFn(); } function showFn() { for (i=1; i<=no; i++) { var mc:Sprite = new ball ; circleArray.push(mc) var angle:Number = 2 * Math.PI / no * i; var targetPoint:Point = new Point(); targetPoint.x = radius * Math.cos(angle) + centerPoint.x; targetPoint.y = radius * Math.sin(angle) + centerPoint.y; addChild(mc); mc.x = centerPoint.x; mc.y = centerPoint.y; mc.alpha = 0; Tweener.addTween(mc, {alpha:1,x:targetPoint.x,y:targetPoint.y, time:sec, transition:"linear",delay:i*hold}); Tweener.addTween(mc, {alpha:0,x:centerPoint.x,y:centerPoint.y, time:sec, transition:"linear",delay:i*hold+(no*hold+1)}); } }
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