BlitPlayer类-位图块播放器

发布:kinglong | 发布时间: 2010年7月1日

在Flash游戏开发过程中，位图块操作是比较常用方式。块传输有哪些好处可以看这里：http://hi.baidu.com/sl19880127sl/blog/item/2a34e144a212328eb3b7dc78.html
我这里对于位图块操作进行了集成做成了播放器类

图片：

块图片

演示：

演示代码：

package com.klstudio.test { import flash.display.Bitmap; import com.klstudio.bd.BlitPlayer; import flash.display.Sprite; /** * BlitPlayer类演示代码 * @author Kinglong(kinglong@gmail.com) * @since:2010-6-30 */ [SWF(backgroundColor="#FF00000", frameRate="31", width="550", height="400")] public class TestPlayer extends Sprite { [Embed(source="bmp1.png")] private var Bmp1Class : Class; public function TestPlayer() { var player:BlitPlayer = new BlitPlayer(40, 40); player.data = Bitmap(new Bmp1Class()).bitmapData; addChild(player); player.play(true); } } } 
BlitPlayer类

package com.klstudio.bd { import flash.geom.Rectangle; import flash.events.Event; import flash.geom.Point; import flash.events.TimerEvent; import flash.utils.Timer; import flash.utils.Dictionary; import flash.display.Bitmap; import flash.display.BitmapData; /** * 位图块播放器 * @author Kinglong(kinglong@gmail.com) * @since:2010-6-30 */ public class BlitPlayer extends Bitmap { private var _frames:Array; private var _index:uint; private var _data:BitmapData; private var _frame:int; private var _rects:Array; private var _timer:Timer; private var _loop:Boolean; /** * @param width 宽度; * @param height 高度; */ public function BlitPlayer(width:uint,height:uint) { if(width > 0 && height > 0){ var canvas:BitmapData = new BitmapData(width, height); _frame = -1; _timer = new Timer(80); _rects = new Array(); super(canvas, "auto", smoothing); }else{ throw Error("width和height值无效! "); } } /** * 总数; */ public function get total():uint{ return _rects.length; } /** * 当前帧数; */ public function get frame():uint{ return _frame; } /** * 跳转帧 * @param value 帧 */ public function set frame(value:uint):void{ if(_rects == null || _rects.length == 0)return; stop(); goto(value); } /** * 设置位图块 * @param value 位图; */ public function set data(value:BitmapData):void{ if(value == null || value.width < 1 || value.height < 1){ return; } clear(); _data = value; var mw:uint = Math.ceil(_data.width / bitmapData.width); var mh:uint = Math.ceil(_data.height / bitmapData.height); for(var j:uint=0;j<mh;j++){ for(var i:uint=0;i<mw;i++){ _rects.push(new Rectangle(i * bitmapData.width, j * bitmapData.height,bitmapData.width,bitmapData.height)); } } } /** * 播放 * @param loop 循环 * @param frames 播放帧组 * @param delay 间隔时间 */ public function play(loop:Boolean=false,frames:Array=null,delay:int=80):void{ if(_data == null) return; _loop = loop; _frames = frames; if(_frames == null || _frames.length == 0) { _frames = []; for(var i:uint=0;i<_rects.length;i++){ _frames.push(i); } } _index = 0; goto(_frames[_index]); _timer.delay = delay; if(_frames.length > 1) { _timer.addEventListener(TimerEvent.TIMER, timerHandler); _timer.start(); }else{ loop = false; } } /** * 位置 * @param x * @param y */ public function move(x:int,y:int):void{ this.x = x; this.y = y; } /** * 关闭 */ public function close():void{ clear(); bitmapData.dispose(); } private function clear():void{ _rects = []; _frames = []; _frame = -1; stop(); bitmapData = new BitmapData(bitmapData.width, bitmapData.height, bitmapData.transparent); } private function stop():void{ if(_timer.running) { _timer.stop(); _timer.removeEventListener(TimerEvent.TIMER, timerHandler); } } private function goto(frame:uint):void{ if(frame > _rects.length - 1) { return; } if(_frame == frame) { return; } _frame = frame; bitmapData.copyPixels(_data, _rects[_frame], new Point(),null, null, false); } private function timerHandler(event:TimerEvent):void{ if(_index < _frames.length - 1) { _index ++; }else{ _index = 0; if(!_loop) { stop(); dispatchEvent(new Event(Event.COMPLETE)); return; } } goto(_frames[_index]); } } }