Here my first pointless little bit of AS 3.0.

Its just an example of implementing the Tween object with a Sprite object.

AS 3.0 Moving Circle.

**EDIT – ive added another quick example based on mulitple circles.

Create a new ActionScript Project in Flex builder 2, and paste the following code.

MovingCircle[as]package
{

import flash.display.MovieClip;
import flash.display.Sprite;
import flash.display.Shape;
import mx.effects.Tween;

public class example extends MovieClip
{

private var _movingCircle:MovingCircle;

public function example()
{
this._movingCircle = new movingCircle();
}

}

private class MovingCircle extends Sprite
{

private var testShape:Shape;

private var _x_tween:Tween;
private var _y_tween:Tween;

private var _targetX_num:Number;
private var _targetY_num:Number;

private var _startX_num:Number;
private var _startY_num:Number;

public function MovingCircle()
{

this.testShape = new Shape();

this.testShape.graphics.beginFill(0xffffff);
this.testShape.graphics.lineStyle(1, 0×000000);
this.testShape.graphics.drawCircle(0, 0, 20);
this.testShape.graphics.endFill();
this.addChild(this.testShape);

this.startXTween();
this.startYTween();
}

private function startXTween():Void
{
this._startX_num = this.x;
this._targetX_num = Math.random() * 200;

delete this._y_tween;

this._x_tween = new Tween(this, this._startX_num, this._targetX_num, (Math.random() * 1000) + 500, 31);
this._x_tween.setTweenHandlers(this.onXTweenUpdate, this.onXTweenEnd);
}

private function startYTween():Void
{
this._startY_num = this.y;
this._targetY_num = Math.random() * 200;

delete this._y_tween;

this._y_tween = new Tween(this, this._startY_num, this._targetY_num, (Math.random() * 1000) + 500, 31);
this._y_tween.setTweenHandlers(this.onYTweenUpdate, this.onYTweenEnd);
}

private function onXTweenUpdate(val:Object):Void
{
this.x = val;
}

private function onXTweenEnd(val:Object):Void
{
this.x = val;

this.startXTween();
}

private function onYTweenUpdate(val:Object):Void
{
this.y = val;
}

private function onYTweenEnd(val:Object):Void
{
this.y = val;

this.startYTween();
}
}

}[/as]

MovingCircles[as]package
{
import flash.display.Sprite;
import flash.display.Shape;
import mx.effects.Tween;
import flash.util.trace;

public class MovingCircles extends Sprite
{
private var _circles_array:Array;
private var _movingCircle2:MovingCircle;

public function MovingCircles()
{
super();

this.initMovingCircles();
}

private function initMovingCircles():Void
{
this._circles_array = new Array();

for(var i:Number = 0; i < 20; i++)
{
this._circles_array.push(new MovingCircle())
this.addChild(this._circles_array[i]);
}
}
}

private class MovingCircle extends Sprite
{
private var _myCircle:Shape;

private var _x_tween:Tween;
private var _y_tween:Tween;

public function MovingCircle()
{
super();

this.initMovieCircle();
}

private function initMovieCircle():Void
{
this._myCircle = new Shape();

this._myCircle.graphics.beginFill(0xffffff);
this._myCircle.graphics.lineStyle(1, 0×000000);
this._myCircle.graphics.drawCircle(0, 0, 10);
this._myCircle.graphics.endFill();
this.addChild(this._myCircle);

this.startXTween();
this.startYTween();
}

private function startXTween():Void
{
delete this._x_tween;

this._x_tween = new Tween(this, this.x, Math.random() * 200, (Math.random() * 1000) + 500, 31);
this._x_tween.setTweenHandlers(this.onXTweenUpdate, this.onXTweenEnd);
}

private function startYTween():Void
{
delete this._y_tween;

this._y_tween = new Tween(this, this.y, Math.random() * 200, (Math.random() * 1000) + 500, 31);
this._y_tween.setTweenHandlers(this.onYTweenUpdate, this.onYTweenEnd);
}

private function onXTweenUpdate(val:Object):Void
{
this.x = val;
}

private function onXTweenEnd(val:Object):Void
{
this.x = val;

this.startXTween();
}

private function onYTweenUpdate(val:Object):Void
{
this.y = val;
}

private function onYTweenEnd(val:Object):Void
{
this.y = val;

this.startYTween();
}
}
}[/as]

This entry was posted on Tuesday, October 18th, 2005 at 1:49 am and is filed under ActionScript, ActionScript 3.0, Flash Player 9. You can follow any responses to this entry through the RSS 2.0 feed. You can leave a response, or trackback from your own site.