最近開始學習html5，因為一直都是研究as，所以還是覺得as順眼一點，但是html5也不能不學，於是就想出了，可以把html5用as的語法來寫出來，做遊戲應該來的比較順手一些，下面開始第一篇
第一篇，顯示一張圖片
一，程式碼比較
as程式碼：
public var loader:Loader;
public function loadimg():void{
loader = new Loader();
loader.contentLoaderInfo.addEventListener(Event.COMPLETE,complete);
loader.load(new URLRequest("10594855.png"));
}
public function complete(event:Event):void{
var image:Bitmap = Bitmap(loader.content);
var bitmap:BitmapData = image.bitmapData;
addChild(image);
}js程式碼:
window.onload = function(){
var canvas = document.getElementById("myCanvas");
var context = canvas.getContext("2d");
image = new Image();
image.onload = function(){
context.drawImage(image, 0, 0, 240, 240);
};
image.src = "10594855.png";
};二,編寫jsend庫)後的程式碼
var loader;
function main(){
loader = new LLoader();
loader.addEventListener(LEvent.COMPLETE,loadBitmapdata);
loader.load("10594855.png","bitmapData");
}
function loadBitmapdata(event){
var bitmapdata = new LBitmapData(loader.content);
var bitmap = new LBitmap(bitmapdata);
addChild(bitmap);
}三,實作
1,建一個靜態類別,方便保存及存取公共的方法屬性,比如canvas等
var LGlobal = function (){}
LGlobal.type = "LGlobal";我們始終都用到canvas,所以要把canvas保存起來，給LGlobal類別添加屬性和方法
LGlobal.canvas = null;
LGlobal.width = 0;
LGlobal.height = 0;
LGlobal.setCanvas = function (id,width,height){
var canvasObj = document.getElementById(id);
if(width)canvasObj.width = width;
if(height)canvasObj.height = height;
LGlobal.width = canvasObj.width;
LGlobal.height = canvasObj.height;
LGlobal.canvas = canvasObj.getContext("2d");
}介面的顯示，為了能夠動態顯示，選擇不停的刷新canvas
給LGlobal類別添加一個不停刷新的方法
LGlobal.onShow = function (){
if(LGlobal.canvas == null)return;
LGlobal.canvas.clearRect(0,0,LGlobal.width,LGlobal.height);
}然後，我預先想把所有現實的物件等都保存在一個陣列裡面，然後按照順序顯示
而所有可以顯示的對象，都有一個show方法，用來把自己畫到canvas上
LGlobal類最後修改為
var LGlobal = function (){}
LGlobal.type = "LGlobal";
LGlobal.canvas = null;
LGlobal.width = 0;
LGlobal.height = 0;
LGlobal.childList = new Array();
LGlobal.setCanvas = function (id,width,height){
var canvasObj = document.getElementById(id);
if(width)canvasObj.width = width;
if(height)canvasObj.height = height;
LGlobal.width = canvasObj.width;
LGlobal.height = canvasObj.height;
LGlobal.canvas = canvasObj.getContext("2d");
}
LGlobal.onShow = function (){
if(LGlobal.canvas == null)return;
LGlobal.canvas.clearRect(0,0,LGlobal.width,LGlobal.height);
LGlobal.show(LGlobal.childList);
}
LGlobal.show = function(showlist){
var key;
for(key in showlist){
if(showlist[key].show){
showlist[key].show();
}
}
}2,as中，圖片顯示用到BitmapData和Bitmap兩個類，為了實現這兩個類別的功能，我們分別建立兩個類別LBitmapData和LBitmap
先來看LBitmapData類，LBitmapData類別用來儲存圖片的資料等，我們把Image()儲存到LBitmapData類別裡面
function LBitmapData(image,x,y,width,height){
var self = this;
self.type = "LBitmapData";
self.oncomplete = null;
if(image){
self.image = image;
self.x = (x==null?0:x);
self.y = (y==null?0:y);
self.width = (width==null?self.image.width:width);
self.height = (height==null?self.image.height:height);
}else{
self.x = 0;
self.y = 0;
self.width = 0;
self.height = 0;
self.image = new Image();
}
}在看LBitmap類，LBitmap類別用來顯示LBitmapData類別裡儲存的Image()
function LBitmap(bitmapdata){
var self = this;
self.type = "LBitmap";
self.x = 0;
self.y = 0;
self.width = 0;
self.height = 0;
self.scaleX=1;
self.scaleY=1;
self.visible=true;
self.bitmapData = bitmapdata;
if(self.bitmapData){
self.width = self.bitmapData.width;
self.height = self.bitmapData.height;
}
}關於Image()的顯示，我們用到一開始說的show方法，實作如下
LBitmap.prototype = {
show:function (){
var self = this;
if(!self.visible)return;
LGlobal.canvas.drawImage(self.bitmapData.image,
self.bitmapData.x,self.bitmapData.y,self.bitmapData.width,self.bitmapData.height,
self.x,self.y,self.width*self.scaleX,self.height*self.scaleY);
}
}function LLoader(){
var self = this;
self.loadtype = "";
self.content = null;
self.oncomplete = null;
self.event = {};
}
LLoader.prototype = {
addEventListener:function(type,listener){
var self = this;
if(type == LEvent.COMPLETE){
self.oncomplete = listener;
}
},
load:function (src,loadtype){
var self = this;
self.loadtype = loadtype;
if(self.loadtype == "bitmapData"){
self.content = new Image();
self.content.onload = function(){
if(self.oncomplete){
self.event.currentTarget = self.content;
self.oncomplete(self.event);
}
}
self.content.src = src;
}
}
}var LEvent = function (){};
LEvent.COMPLETE = "complete";
LEvent.ENTER_FRAME = "enter_frame";
LEvent.currentTarget = null;
LEvent.addEventListener = function (node, type, fun){
if(node.addEventListener){
node.addEventListener(type, fun, false);
}else if(node.attachEvent){
node['e' + type + fun] = fun;
node[type + fun] = function(){node['e' + type + fun]();}
node.attachEvent('on' + type, node[type + fun]);
}
}function addChild(DisplayObject){
LGlobal.childList.push(DisplayObject);
}
