本文实例为大家分享了js掷骰子小游戏的具体代码，供大家参考，具体内容如下
因为这次作业是第一个实验，比较简单，但是要求面向对象来做，而我这个时候又刚好在学JS，JS来做骰子游戏即有前端了，又省了后台处理，代码量会比用JAVA来做少了非常非常多。考虑到这种实验实在不想浪费时间去用JAVA写，于是有了一下JS实现的版本。但是大家都知道JS的面向对象其实是伪面向对象。我感觉并不好用，因为用句柄的方式无法传值，你封装成对象了还得拆出来成为过程（单一方法）来用。
版本1： （没有用面向对象）
<!DOCTYPE>
<html>
<head>
<title>掷骰子游戏 author:SenDog</title>
<meta charset="UTF-8">
<script>
var leftX = 150;
var topY = 100;
var diceX = 80;
var diceY = 80;
var dotR = 4;
var count = 0;
var lastNum = 0;
var flag = false;
function clickMe() {
count = 0;
if(flag) {
return false;
}
flag = true;
var ctx = document.getElementById("canvas").getContext('2d');
ctx.beginPath();
// ctx.strokeRect(leftX,topY,diceX,diceY);//绘制矩形 加粗
//ctx.strokeRect(leftX+150,topY,diceX,diceY);
setTimeout(function(){
random(ctx);},200);
}
function drawDice(ctx,randomNum,randomNum2) {//绘制 骰子 123456的点数
ctx.clearRect(leftX,topY,diceX,diceY);
switch(randomNum) {
case 1:
draw1();
break;
case 2:
draw2();
break;
case 3:
draw3();
break;
case 4:
draw4();
break;
case 5:
draw5();
break;
case 6:
draw6();
break;
}
ctx.clearRect(leftX+150,topY,diceX,diceY);
switch(randomNum2) {
case 1:
draw11();
break;
case 2:
draw22();
break;
case 3:
draw33();
break;
case 4:
draw44();
break;
case 5:
draw55();
break;
case 6:
draw66();
break;
}
count++;
if(count>=20) {
if(randomNum+randomNum2==7) {
alert("骰子1："+randomNum+"，骰子2:"+randomNum2+"总和为7您赢了");
}
else {
alert("骰子1："+randomNum+"；骰子2:"+randomNum2);
}
flag = false;
return false;
} else {
setTimeout(function(){
random(ctx);
},200-count);
}
}
function random(ctx) {//生成骰子点数，如果和上一步的点数相同重新生成点数，并绘制
var randomNum = Math.floor(Math.random()*6)+1;
var randomNum2 = Math.floor(Math.random()*6)+1;
if(randomNum == lastNum) {
random(ctx);
} else {
lastNum = randomNum;
drawDice(ctx,randomNum,randomNum2);
}
}
function commonDraw(ctx,dotX,dotY) {
ctx.beginPath();
ctx.arc(dotX,dotY,dotR,0,2*Math.PI,false);
ctx.stroke();
ctx.fill();
}
function draw1() {
var ctx = document.getElementById("canvas").getContext('2d');
ctx.fillStyle="#0000ff";
var dotX = leftX+diceX/2;
var dotY = topY+diceY/2;
commonDraw(ctx,dotX,dotY);
}
function draw2() {
var ctx = document.getElementById("canvas").getContext('2d');
ctx.fillStyle="#99FF66";
var dotX = leftX+4*dotR;
var dotY = topY+4*dotR;
commonDraw(ctx,dotX,dotY);
var dotX = leftX+diceX-4*dotR;
var dotY = topY+diceY-4*dotR;
commonDraw(ctx,dotX,dotY);
}
function draw3() {
draw1();
draw2();
}
function draw4() {
draw2();
var ctx = document.getElementById("canvas").getContext('2d');
ctx.fillStyle="#99CC00";
var dotX = leftX+diceX-4*dotR;
var dotY = topY+4*dotR;
commonDraw(ctx,dotX,dotY);
var dotX = leftX+4*dotR;
var dotY = topY+diceY-4*dotR;
commonDraw(ctx,dotX,dotY);
}
function draw5(){
draw1();
draw4();
}
function draw6(){
var ctx = document.getElementById("canvas").getContext('2d');
ctx.fillStyle="#996633";
var dotX = leftX+4*dotR;
var dotY = topY+diceY/2
commonDraw(ctx,dotX,dotY);
var dotX = leftX+diceY-4*dotR;
commonDraw(ctx,dotX,dotY);
draw4();
}
/* -------------骰子2----------------*/
function draw11() {
var ctx = document.getElementById("canvas").getContext('2d');
ctx.fillStyle="#0000ff";
var dotX = leftX+diceX/2+150;
var dotY = topY+diceY/2;
commonDraw(ctx,dotX,dotY);
}
function draw22() {
var ctx = document.getElementById("canvas").getContext('2d');
ctx.fillStyle="#99FF66";
var dotX = leftX+4*dotR+150;
var dotY = topY+4*dotR;
commonDraw(ctx,dotX,dotY);
var dotX = leftX+diceX-4*dotR+150;
var dotY = topY+diceY-4*dotR;
commonDraw(ctx,dotX,dotY);
}
function draw33() {
draw11();
draw22();
}
function draw44() {
draw22();
var ctx = document.getElementById("canvas").getContext('2d');
ctx.fillStyle="#99CC00";
var dotX = leftX+diceX-4*dotR+150;
var dotY = topY+4*dotR;
commonDraw(ctx,dotX,dotY);
var dotX = leftX+4*dotR+150;
var dotY = topY+diceY-4*dotR;
commonDraw(ctx,dotX,dotY);
}
function draw55(){
draw11();
draw44();
}
function draw66(){
var ctx = document.getElementById("canvas").getContext('2d');
ctx.fillStyle="#996633";
var dotX = leftX+150+4*dotR;
var dotY = topY+diceY/2
commonDraw(ctx,dotX,dotY);
var dotX = leftX+150+diceY-4*dotR;
commonDraw(ctx,dotX,dotY);
draw44();
}
function init() {
var ctx = document.getElementById("canvas").getContext('2d');
ctx.beginPath();
ctx.strokeRect(leftX,topY,diceX,diceY);//绘制灰色框框 第一个骰子
ctx.strokeRect(leftX+150,topY,diceX,diceY);//第二个骰子的灰色框框
ctx.stroke();
draw6();
draw66();
}
</script>
</head>
<body οnlοad="init();">
<canvas width="600" height="300" >
your brower is not support html5
</canvas>
<input type="button" value="开始" οnclick="clickMe();"/>
</body>
</html>
