113 lines
2.9 KiB
JavaScript
113 lines
2.9 KiB
JavaScript
'use strict';
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//活动对象构造
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function Item(options){
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options = options||{};
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var _ = this;
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var settings = {
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x:0, //横坐标
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y:0, //纵坐标
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width:20, //宽
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height:20, //高
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type:1, //对象类型
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status:1, //对象状态,1表示正常
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orientation:0, //当前定位方向,0表示上,1表示右,2表示下,3表示左
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vector:{ //目标坐标
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x:0,
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y:0
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},
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speed:1, //速度等级,1表示与刷新频率一致
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update:function(){}, //更新参数信息
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draw:function(){} //绘制
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};
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for(var i in settings){
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_[i] = options[i]||settings[i];
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}
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}
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//游戏对象
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function Game(id,options){
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var _ = this;
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var _settings = {
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name:'Eat Beans', //游戏名称
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width:960, //画布宽度
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height:640, //画布高度
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map:{ //地图信息
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x:0, //地图起点坐标
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y:0,
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size:20, //地图单元的宽度
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data:[]
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},
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fresh:100, //画布刷新频率,一秒10帧
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audio:[], //音频资源
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images:[], //图片资源
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};
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for(i in options){
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_settings[i] = options[i];
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}
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var $canvas = document.getElementById(id);
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$canvas.width = _settings.width;
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$canvas.height = _settings.height;
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var _context = $canvas.getContext('2d'); //画布上下文环境
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var _items = []; //动画对象队列
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var _status = 0; //页面状态
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var _t = 0; //内部计算器,交替帧数更新动画
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var _hander = null; //画布更新
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//开始画面
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this.launch = function(){
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_hander = setInterval(function(){
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_t++;
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var s = _t%4;
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//清除画布
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_context.clearRect(0,0,_settings.width,_settings.height);
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//logo
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_context.fillStyle = '#FC3';
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_context.beginPath();
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if(s<2){
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_context.arc(_settings.width/2,_settings.height*.45,50,.20*Math.PI,1.80*Math.PI,false);
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_context.lineTo(_settings.width/2,_settings.height*.45);
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}else{
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_context.arc(_settings.width/2,_settings.height*.45,50,.01*Math.PI,1.99*Math.PI,false);
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_context.lineTo(_settings.width/2,_settings.height*.45);
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}
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_context.closePath();
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_context.fill();
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_context.fillStyle = '#000';
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_context.beginPath();
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_context.arc(_settings.width/2+5,_settings.height*.45-27,7,0,2*Math.PI,false);
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_context.closePath();
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_context.fill();
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//游戏名
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_context.font = 'bold 42px Helvetica';
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_context.textAlign = 'center';
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_context.textBaseline = 'middle';
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_context.fillStyle = '#FFF';
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_context.fillText(_settings.name,_settings.width/2,_settings.height*.618);
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},_settings.fresh);
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};
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//动画停止
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this.stop = function(){
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_hander&&clearInterval(_hander);
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};
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//动画开始
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this.start = function(){
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_.stop();
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_hander = setInterval(function(){ //定时刷新画布
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_t++;
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_items.forEach(function(item,index){
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item.update(_t);
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});
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},_settings.fresh);
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};
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//添加对象
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this.addItem = function(item){
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_items.push(item);
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};
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//条件嗅探
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this.render = function(){
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};
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//绘图
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this.draw = function(){
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};
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} |