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<!doctype html>
<html>
<head>
<meta charset="utf-8">
<title>五子棋</title>
<style type="text/css">
*{
margin: 0px;
padding: 0px;
}
canvas{
background: url(images/bg.jpg);
}
canvas:hover{
cursor: pointer;
}
</style>
</head>
<body>
<canvas width="800" height="800" id="canvas"></canvas>
<script type="text/javascript">
//初始化
var canvas = document.getElementById(‘canvas‘);
var context = canvas.getContext(‘2d‘);
var flag = 1;
//定义二维数组
var data = new Array();
for(var i=1; i<16; i++){
data[i] = new Array();
for(var j=1; j<16; j++){
data[i][j] = 0;
}
}
window.onload = function() {
// 1.绘制网格
drawGrid();
// 2.绘制棋子
drawPiece();
}
function drawGrid() {
for(var i=1; i<16; i++){
context.beginPath();
context.moveTo(50, 50*i);
context.lineTo(750, 50*i);
context.closePath();
context.stroke();
}
for(var i=1; i<16; i++){
context.beginPath();
context.moveTo(50*i, 50);
context.lineTo(50*i, 750);
context.closePath();
context.stroke();
}
}
function drawPiece() {
canvas.onclick = function(){
var x = Math.round(event.clientX/50);
var y = Math.round(event.clientY/50);
if(data[x][y] !=0){
alert("棋子不能重复"); return false;
}
if(flag == 1){
data[x][y] = 1;
context.fillStyle = "#000";
context.beginPath();
context.arc((x*50), (y*50), 20, 0*Math.PI, 2*Math.PI, false);
context.closePath();
context.fill();
bunko(x, y, flag);
flag = 2;
}else{
data[x][y] = 2;
context.fillStyle = "#fff";
context.beginPath();
context.arc((x*50), (y*50), 20, 0*Math.PI, 2*Math.PI, false);
context.closePath();
context.fill();
bunko(x, y, flag);
flag = 1;
}
}
function bunko(x, y, flag) {
var count1 = 0;
var count2 = 0;
var count3 = 0;
var count4 = 0;
/* 1.水平方向判断 */
//向左判断
for(var n=x; n>0; n--){
if(data[n][y] != flag){
break;
}
count1 = count1+1;
}
//向右判断 x+1 表示在水平方向上判断时不包含当前棋子本身
for(var n=x+1; n<16; n++){
if(data[n][y] != flag){
break;
}
count1 = count1+1;
}
/* 2.垂直方向判断 */
//向上判断
for(var n=y; n>0; n--){
if(data[x][n] != flag){
break;
}
count2 = count2+1;
}
//向下判断 y+1 表示在垂直方向上判断时不包含当前棋子本身
for(var n=y+1; n<16; n++){
if(data[x][n] != flag){
break;
}
count2 = count2+1;
}
/* 3.斜对角（右下左上方向）*/
//右下左上
for(var n=x, m=y; n>1 && m>1; n--, m--){
if(data[n][m] != flag){
break;
}
count3 = count3+1;
}
for(var n=x+1, m=y+1; n<16 && m<16; n++, m++){
if(data[n][m] != flag){
break;
}
count3 = count3+1;
}
for(var n=x, m=y; n<16 && m>1; n++, m--){
if(data[n][m] != flag){
break;
}
count4 = count4+1;
}
for(var n=x-1, m=y+1; n>0 && m<16; n--, m++){
if(data[n][m] != flag){
break;
}
count4 = count4+1;
}
if(count1>=5 || count2>=5 || count3>=5 || count4>=5){
if(flag == 1){
alert("黑棋赢了！");
return false;
}else{
alert("白起赢了！");
}
}
}
}
</script>
</body>
</html>
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原文地址：http://www.cnblogs.com/chenshuo/p/4231605.html
