本文实例为大家分享了js实现AI五子棋人机大战的具体代码，供大家参考，具体内容如下
实现原理就是计算五子棋所有赢的种类，利用canvas实现五子棋排版落子。
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<title>五子棋</title>
<style>
#canvas{
display: block;
margin:50px auto;
box-shadow: -2px -2px 2px #EFEFEF, 5px 5px 5px #b9b9b9;
}
</style>
</head>
<body>
<canvas id="canvas" width="450px" height="450px"></canvas>
<script>
var canvas = document.getElementById('canvas');
var context = canvas.getContext('2d');
var me = true; //true黑子， false， 白子
var over = false;
var box = []; //全部落子点
var wins = []; //全部赢的方法 三维数组
for(var i = 0; i< 15 ;i++) {
box[i] = [];
wins[i] = [];
for(var j = 0; j < 15; j++) {
box[i][j] = 0;
wins[i][j] = [];
}
}
var count = 0; //总共赢的数量572种
//横向
for(var a = 0; a < 15; a++) {
for(var b = 0; b < 11;b++) {
//wins[0][0][0]
//wins[0][1][0]
//wins[0][2][0]
for(var c = 0; c < 5;c++) {
wins[a][b + c][count] = true;
}
count++;
}
}
//纵向
for(var a = 0; a < 15; a++) {
for(var b = 0; b < 11;b++) {
//wins[0][0][0]
//wins[0][1][0]
//wins[0][2][0]
for(var c = 0; c < 5;c++) {
wins[b + c][a][count] = true;
}
count++;
}
}
//斜 '\'
for(var a = 0; a < 11; a++) {
for(var b = 0; b < 11;b++) {
//a = 0, b = 10
//win[0][10]
//win[1][11]
for(var c =0; c < 5;c++) {
wins[a + c][b + c][count] = true;
}
count++;
}
}
//反斜 '/'
for(var a = 0; a < 11; a++) {
for(var b = 4; b < 15;b++) {
//a = 0, b = 0
//win[0][5]
//win[1][4]
for(var c =0; c < 5;c++) {
wins[a + c][b - c][count] = true;
}
count++;
}
}
//我方、计算机方总共可以赢的数量，每在某一方式上可以赢的位置下一颗子，myWin[i]++
//当myWin[i] == 5,说明我方在这个方式上赢的落子已经达到5颗，说明我方已经赢了
var myWin = []; //
var computerWin = [];
for(var i = 0; i < count;i++) {
myWin[i] = 0;
computerWin[i] = 0;
}
//画纵横线条
function drawLine() {
context.strokeStyle = '#ccc';
for(var i = 0; i < 15; i++) {
context.moveTo(15 + 30 * i, 15);
context.lineTo(15 + 30 * i, 435);
context.stroke();
context.moveTo(15, 15 + 30 * i);
context.lineTo(435, 15 + 30 * i);
context.stroke();
}
}
drawLine()
//走一步，画黑白子，并记录，黑子为1，白子为2
function oneStep(i, j, me) {
context.beginPath();
context.arc(15 + i * 30, 15 + j*30, 13, 0, Math.PI * 2);
context.closePath();
var gradient = context.createRadialGradient(15 + i * 30 + 2, 15 + j*30 - 2, 13, 15 + i * 30 + 2, 15 + j*30 - 2, 0)
if(me) { //黑子
gradient.addColorStop(0, '#0A0A0A');
gradient.addColorStop(1, '#636766');
box[i][j] = 1;
} else { //白子
gradient.addColorStop(0, '#D1D1D1');
gradient.addColorStop(1, '#F9F9F9');
box[i][j] = 2;
}
context.fillStyle = gradient;
context.fill();
}
canvas.onclick = function(e) {
if(over) return;
if(!me) return;
var x = Math.floor(e.offsetX/30);
var y = Math.floor(e.offsetY/30);
if(box[x][y] == 0) { //判断没有落子
oneStep(x, y, me);
for(var k = 0; k<count; k++) {//第几种赢法
if(wins[x][y][k]) {
myWin[k]++;
computerWin[k] = 6; //因为我方在这个点上已经落子，所以计算机不可能在这个点上赢，
if(myWin[k] == 5) {
console.log('你赢了')
over = true;
}
}
}
if(!over) {
me = !me;
computerAI();
}
}
}
//计算机
function computerAI() {
var myScore = []; //我方分数
var computerScore = []; //计算机分数
var max = 0; //最大分数
var u = 0, v = 0; //最大分数点
for(var i =0; i < 15; i++) {
myScore[i] = [];
computerScore[i] = [];
for(var j =0; j < 15; j++) {
myScore[i][j] = 0;
computerScore[i][j] = 0;
}
}
for(var i =0; i < 15; i++) {
for(var j =0; j < 15; j++) {
if(box[i][j] == 0) { //每个空闲点上进行计算分数
for(var k =0;k<count;k++) { //遍历所有可以赢的，数量
if(wins[i][j][k]) { //可以赢的点进行算分
if(myWin[k] == 1) {
myScore[i][j] += 200;
} else if(myWin[k] == 2) {
myScore[i][j] += 400;
} else if(myWin[k] == 3) {
myScore[i][j] += 2000;
} else if(myWin[k] == 4) {
myScore[i][j] += 10000;
}
if(computerWin[k] == 1) {
computerScore[i][j] += 220;
} else if(computerWin[k] == 2) {
computerScore[i][j] += 420;
} else if(computerWin[k] == 3) {
computerScore[i][j] += 2100;
} else if(computerWin[k] == 4) {
computerScore[i][j] += 20000;
}
}
}
//得出最大分数的点，并赋给u,v
if(myScore[i][j] > max) {
max = myScore[i][j];
u = i;
v = j;
} else if(myScore[i][j] == max) {
if(computerScore[i][j] > computerScore[u][v]) {
u = i;
v = j;
}
}
if(computerScore[i][j] > max) {
max = computerScore[i][j];
u = i;
v = j;
} else if(computerScore[i][j] == max) {
if(myScore[i][j] > myScore[u][v]) {
u = i;
v = j;
}
}
}//所有空闲点上进行计算分数
}
}
oneStep(u, v, false); //走一步
for(var k = 0; k<count; k++) {//第几种赢法
if(wins[u][v][k]) {
computerWin[k]++;
myWin[k] = 6;
if(computerWin[k] == 5) {
console.log('计算机赢了--')
over = true;
}
}
}
if(!over) {
me = !me;
}
}
</script>
</body>
</html>
效果图如下
实际操作效果还行，但相比真正ai实现还是有很多不足。
