【AS3.0】纯AS代码实现图片的像素点渐现效果

Flash 2007-8-29 13:12

利用 BitmapData 类和 Bitmap 类打造像素点渐现的效果, 纯AS代码. 不错. 请看效果, 如果想重看效果, 就刷新本页一次:

源文件: 压缩包下载

package {

import flash.display.MovieClip;

import flash.display.BitmapData;

import flash.display.Bitmap;

import flash.display.Loader;

import flash.net.URLLoader;

import flash.events.Event;

import flash.net.URLRequest;

import flash.geom.Matrix;

import flash.utils.Timer;

import flash.events.TimerEvent;

import flash.geom.Rectangle;

import flash.geom.Point;

public class DisplayList extends MovieClip {

private var _bitmapData:BitmapData;

private var _temporaryBitmapData:BitmapData;

private var _loader:Loader;

private var _timer:Timer;

private var _randomValue:uint;

public function DisplayList() {

var bitmapData:BitmapData = new BitmapData(250, 200, true, 0xFFFFFF);

var bitmap:Bitmap = new Bitmap(bitmapData);

addChild(bitmap);

_bitmapData = bitmapData;

_loader = new Loader();

_loader.contentLoaderInfo.addEventListener(Event.COMPLETE,onLoad);

var request:URLRequest = new URLRequest("http://www.rightactionscript.com/samplefiles/image2.jpg");

_loader.load(request);

_temporaryBitmapData = new BitmapData(250, 200, true, 0xFFFFFF);

}

private function onLoad(event:Event):void{

_temporaryBitmapData.draw(_loader, new Matrix(.5, 0, 0, .5));

_timer = new Timer(50, 50);

_timer.addEventListener(TimerEvent.TIMER, onTimer);

_timer.start();

_randomValue = 0;

}

private function onTimer(event:TimerEvent):void{

_randomValue = _bitmapData.pixelDissolve(_temporaryBitmapData, new Rectangle(0, 0, 250, 200), new Point(0, 0), _randomValue, 250 * 200 / 50);

}

标签集:TAGS:flash AS3 Flex

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