利用js canvas实现五子棋游戏
本文实例为大家分享了canvas实现五子棋游戏的具体代码，供大家参考，具体内容如下
html部分
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document</title>
</head>
<body style="margin: 0;">
<canvas style="margin-left: 20px;" id="five"></canvas>
<h1 style="font-size: 40px;font-weight: bolder;margin-left: 200px;margin-top: 0;margin-bottom: 0;">五子棋</h1>
<h2 style="font-size: 40px;font-weight: bolder;margin-left: 200px;margin-top: 0;" id="currole">轮到:黑</h2>
<div id="res" style="font-size: 40px;font-weight: bolder;margin-left: 200px;">胜者:</div>
</body>
<script>
let cav = document.getElementById('five')
let ctx = cav.getContext('2d')
let k = 50 //倍数
let r = k/4
cav.width = cav.height = 16*k
ctx.strokeStyle="#000000";
for(let i = 0;i<15;i++){
ctx.beginPath();
ctx.moveTo((i+1)*k,k);
ctx.lineTo((i+1)*k,15*k);
ctx.stroke();
}
for(let i = 0;i<15;i++){
ctx.beginPath();
ctx.moveTo(k,(i+1)*k);
ctx.lineTo(15*k,(i+1)*k);
ctx.stroke();
}
function initer(event){
let x = event.offsetX - k
let y = event.offsetY - k
let xclose = close(x,0,14)
let yclose = close(y,0,14)
let nodearr = []
let minxd = Math.abs(x-xclose[0]*k)<Math.abs(x-xclose[1]*k)?
Math.abs(x-xclose[0]*k)<r?xclose[0]*k:undefined
:
Math.abs(x-xclose[1]*k)<r?xclose[1]*k:undefined
let maxyd = Math.abs(y-yclose[0]*k)<Math.abs(y-yclose[1]*k)?
Math.abs(y-yclose[0]*k)<r?yclose[0]*k:undefined
:
Math.abs(y-yclose[1]*k)<r?yclose[1]*k:undefined
if((minxd!==undefined)&&(maxyd!==undefined)){
nodearr = [minxd,maxyd]
}
if(nodearr.length!==0){
setNode(nodearr)
}
}
cav.addEventListener("click",initer)
function close(coo,lort,rorb){
coo<0?coo=0:coo=coo
coo>14*k?coo=14*k:coo=coo
let dect = rorb - lort
if(dect===1){
return [lort,rorb]
}else{
if(coo<(lort+Math.ceil(dect/2))*k){
let nlort=lort
let nrorb=lort+Math.ceil(dect/2)
return close(coo,nlort,nrorb)
}else{
let nlort=lort+Math.ceil(dect/2)
let nrorb=rorb
return close(coo,nlort,nrorb)
}
}
}
let colorflag = 0
function setNode(arr){
if(gomoku[arr[0]/k][arr[1]/k]!==undefined){
return
}
if(colorflag===0){
ctx.fillStyle="black"
ctx.beginPath();
ctx.arc(arr[0]+k,arr[1]+k,r,0,2*Math.PI);
ctx.stroke();
ctx.fill();
checkFinish([arr[0]/k,arr[1]/k])
gomoku[arr[0]/k][arr[1]/k] = colorflag
colorflag = 1
document.getElementById('currole').innerHTML="轮到:白"
}else{
ctx.fillStyle="white"
ctx.beginPath();
ctx.arc(arr[0]+k,arr[1]+k,r,0,2*Math.PI);
ctx.stroke();
ctx.fill();
checkFinish([arr[0]/k,arr[1]/k])
gomoku[arr[0]/k][arr[1]/k] = colorflag
colorflag = 0
document.getElementById('currole').innerHTML="轮到:黑"
}
}
</script>
<script src="./five.js"></script>
</html>
外部js文件部分
let gomoku = new Array(15)
for(let i = 0;i<gomoku.length;i++){
gomoku[i]=new Array(15)
}
//black 0 white 1
function checkFinish(curnode){
for(let i =0;i<4;i++){
let totalLength = 1
let aflag = true
let bflag = true
for(let j=0;j<4;j++){
let dictNum = j+1
switch(i){
case 0:
if(aflag){
(gomoku[curnode[0]+dictNum][curnode[1]]===colorflag)
&&((curnode[0]+dictNum)<=14)?
totalLength++:aflag=false
}
if(bflag){
(gomoku[curnode[0]-dictNum][curnode[1]]===colorflag)
&&((curnode[0]-dictNum)>=0)?
totalLength++:bflag=false
}
break;
case 1:
if(aflag){
(gomoku[curnode[0]][curnode[1]+dictNum]===colorflag)
&&((curnode[1]+dictNum)<=14)?
totalLength++:aflag=false
}
if(bflag){
(gomoku[curnode[0]][curnode[1]-dictNum]===colorflag)
&&((curnode[1]-dictNum)>=0)?
totalLength++:bflag=false
}
break;
case 2:
if(aflag){
(gomoku[curnode[0]+dictNum][curnode[1]+dictNum]===colorflag)
&&((curnode[1]+dictNum)<=14)
&&((curnode[0]+dictNum)<=14)?
totalLength++:aflag=false
}
if(bflag){
(gomoku[curnode[0]-dictNum][curnode[1]-dictNum]===colorflag)
&&((curnode[1]-dictNum)>=0)
&&((curnode[0]-dictNum)>=0)?
totalLength++:bflag=false
}
break;
case 3:
if(aflag){
(gomoku[curnode[0]+dictNum][curnode[1]-dictNum]===colorflag)
&&((curnode[1]-dictNum)>=0)
&&((curnode[0]+dictNum)<=14)?
totalLength++:aflag=false
}
if(bflag){
(gomoku[curnode[0]-dictNum][curnode[1]+dictNum]===colorflag)
&&((curnode[1]+dictNum)<=14)
&&((curnode[0]-dictNum)>=0)?
totalLength++:bflag=false
}
break;
}
if(totalLength>=5){
if(colorflag===0){
document.getElementById('res').innerHTML='胜者:黑方'
cav.removeEventListener("click",initer)
}else{
document.getElementById('res').innerHTML='胜者:白方'
cav.removeEventListener("click",initer)
}
break;
}
if((aflag===false)&&(bflag===false)){
break;
}
}
if(totalLength>=5){
break;
}
}
}
//all work and no play makes jack a dull boy
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