javaScript实现网页版的弹球游戏

Z时代
2024-01-10
分类：IT

利用javeScript对象以及方法实现的网页弹球游戏，供大家参考，具体内容如下


<!DOCTYPE html>
<html>
<head>
<tilie>呼呼哈嘿的网页弹球</title>
</head>
<body>
<canvas id="canvas"width="400"height="400"></canvas>
 <script src="https://cdn.bootcdn.net/ajax/libs/jquery/3.6.0/jquery.js"></script>
<script>
var canv=document.getElementById("canvas");
var ctx=canv.getContext("2d");
//创建一个小球对象
var ball={
x: 100,
y: 100,
xSpeed: -5,
ySpeed: -5
};
//定义绘制小球的方法
ball.draw=function(){
  ctx.beginPath();
  ctx.arc(this.x,this.y,10,0,Math.PI*2,false);
  ctx.fill();
};
//定义小球运动的方法
ball.move=function(){
 this.x =this.x+this.xSpeed;
 this.y =this.y+this.ySpeed;
};
//边界判断
ball.checkCanvas=function(panelStart,panelEnd)
{
 if(this.x<0||this.x>400)
 this.xSpeed=-this.xSpeed;
if(this.y<0)
 this.ySpeed=-this.ySpeed;
if(this.y>390){
 if(this.x>panelStart && this.x<panelEnd)
   this.ySpeed=-this.ySpeed;
 else{
  alert("GAME OVER!!!");
  this.x= 50;
 this.y=100;
}
}
};
//定时功能使得小球动起来
setInterval(function()
{
  ctx.clearRect(0,0,400,400);
  ball.draw();
  panel.draw();
  ball.move();
  ball.checkCanvas(panel.x,panel.x+panel.xSize);
  ctx.strokeRect(0,0,400,400);
},30);  //定时函数，每30ms执行一次大括号中的代码；
//创建挡板的对象；
var panel ={
 x:200,
 y:390,
 xSize: 50,
 ySize: 5
};
//挡板移动方法
panel.draw=function(){
    ctx.fillRect(this.x,this.y,this.xSize,this.ySize);
};
//利用jquery实现按键交互；
$("body").keydown(function(event)
{
console.log(event.keyCode);
if(event.keyCode==37){
  panel.x=panel.x-5;
 if(panel.x<0){
panel.x=0;
   }
  }
if(event.keyCode==39){
 panel.x=panel.x+5;
if(panel.x>400-50){
panel.x=350;
    }
  }
} 
);
</script>
</body>
</html>