forked from: Tween Circles
/**
* Copyright hongou_tarou ( http://wonderfl.net/user/hongou_tarou )
* MIT License ( http://www.opensource.org/licenses/mit-license.php )
* Downloaded from: http://wonderfl.net/c/5eam
*/
// forked from Fumio's Tween Circles
package {
import flash.display.DisplayObject;
import flash.display.Sprite;
import flash.display.Shape;
import flash.display.Graphics;
import flash.display.BlendMode;
import fl.transitions.Tween;
import fl.transitions.easing.Bounce;
import flash.events.MouseEvent;
public class TweenCircles extends Sprite {
private var circleCount:uint = 25;
private var circles:Vector.<DisplayObject> = new Vector.<DisplayObject>(circleCount);
private var tweensX:Vector.<Tween> = new Vector.<Tween>(circleCount);
private var tweensY:Vector.<Tween> = new Vector.<Tween>(circleCount);
private var activeCount:uint;
private var delay:Number = 1 / circleCount;
public function TweenCircles() {
var nWidth:int = stage.stageWidth;
var nHeight:int = stage.stageHeight;
var centerX:Number = nWidth / 2;
var centerY:Number = nHeight / 2;
// stage.color = 0x000000;
setBackground(nWidth, nHeight, 0x0);
for (var i:uint = 0; i < circleCount; i++) {
var nX:Number = Math.random() * nWidth;
var nY:Number = Math.random() * nHeight;
var circle:Shape = createCircle(10, 0x113355, (i + 1) * 3);
setAppearance(circle, nX, nY, 1 - i * 0.025, BlendMode.ADD);
setTween(circle, i, centerX, centerY, (0.5 + i * delay) * 1.5);
addChild(circle);
}
stage.addEventListener(MouseEvent.MOUSE_DOWN, startTween);
}
private function createCircle(stroke:Number, color:uint, radius:Number):Shape {
var circle:Shape = new Shape();
var myGraphics:Graphics = circle.graphics;
myGraphics.lineStyle(stroke, color);
myGraphics.drawCircle(0, 0, radius);
return circle;
}
private function setAppearance(instance:DisplayObject, nX:Number, nY:Number, nAlpha:Number, _blendMode:String):void {
instance.x = nX;
instance.y = nY;
instance.alpha = nAlpha;
instance.blendMode = _blendMode;
}
private function setTween(target:DisplayObject, id:uint, nX:Number, nY:Number, duration:Number):void {
var tweenX:Tween = new Tween(target, "x", Bounce.easeOut, target.x, nX, duration, true);
var tweenY:Tween = new Tween(target, "y", Bounce.easeOut, target.x, nX, duration, true);
circles[id] = target;
tweensX[id] = tweenX;
tweensY[id] = tweenY;
}
private function startTween(eventObject:MouseEvent):void {
var nX:Number = eventObject.stageX;
var nY:Number = eventObject.stageY;
for (var i:uint = 0; i < circleCount; i++) {
var circle:DisplayObject = circles[i];
changeTween(tweensX[i], circle, circle.x, nX);
changeTween(tweensY[i], circle, circle.y, nY);
}
}
private function changeTween(_tween:Tween, target:DisplayObject, begin:Number, finish:Number):void {
_tween.stop();
_tween.begin = begin;
_tween.finish = finish;
_tween.start();
}
private function setBackground(nWidth:Number, nHeight:Number, color:uint):void {
var background:Shape = new Shape();
var myGraphics:Graphics = background.graphics;
myGraphics.beginFill(color);
myGraphics.drawRect(0, 0, nWidth, nHeight);
stage.addChildAt(background, 0);
}
}
}