玉兔吃月饼小游戏
原生canvas实现
在线demo:http://idoube.com/proj/tuzibenyue/
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请教一下js面向对象和构造函数的用法...
var gameMonitor = {
run : function(ctx){
var _this = gameMonitor;
ctx.clearRect(0, 0, _this.bgWidth, _this.bgHeight);
_this.rollBg(ctx);
//绘制飞船
_this.ship.paint();
_this.ship.eat(_this.foodList);
//产生月饼
_this.genorateFood();
//绘制月饼
for(i=_this.foodList.length-1; i>=0; i--){
var f = _this.foodList[i];
if(f){
f.paint(ctx);
f.move(ctx);
}
}
_this.timmer = setTimeout(function(){
gameMonitor.run(ctx);
}, Math.round(1000/60));
_this.time++;
}
}
- 为什么要用_this引用this?
- _this.ship.paint()中paint()方法,是在Ship()构造函数中声明的啊。这么用,不明白:blush:
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