<!DOCTYPE html>
< html xmlns="http://www.w3.org/1999/xhtml">
< head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title></title>
<style type="text/css">
body {
margin: 10px;
}
</style>
<script type="text/javascript">
var canvas;
var context;
var isWhite = true;//設置是否該輪到白棋
var isWell = false;//設置該局棋盤是否贏了，如果贏了就不能再走了
var img_b = new Image();
img_b.src = "images/b.png";//白棋圖片
var img_w = new Image();
img_w.src = "images/w.png";//黑棋圖片
var chessData = new Array(15);//這個為棋盤的二維數組用來保存棋盤信息，初始化0為沒有走過的，1為白棋走的，2為黑棋走的
for (var x = 0; x < 15; x++) {
chessData[x] = new Array(15);
for (var y = 0; y < 15; y++) {
chessData[x][y] = 0;
}
}
function drawRect() {//頁面加載完畢調用函數，初始化棋盤
canvas = document.getElementById("canvas");
context = canvas.getContext("2d");
for (var i = 0; i <= 640; i += 40) {//繪制棋盤的線
context.beginPath();
context.moveTo(0, i);
context.lineTo(640, i);
context.closePath();
context.stroke();
context.beginPath();
context.moveTo(i, 0);
context.lineTo(i, 640);
context.closePath();
context.stroke();
}
}
function play(e) {//鼠標點擊時發生
var x = parseInt((e.clientX - 20) / 40);//計算鼠標點擊的區域，如果點擊了（65，65），那么就是點擊了（1，1）的位置
var y = parseInt((e.clientY - 20) / 40);
if (chessData[x][y] != 0) {//判斷該位置是否被下過了
alert("你不能在這個位置下棋");
return;
}
if (isWhite) {
isWhite = false;
drawChess(1, x, y);
}
else {
isWhite = true;
drawChess(2, x, y);
}
}
function drawChess(chess, x, y) {//參數為，棋（1為白棋，2為黑棋），數組位置
if (isWell == true) {
alert("已經結束了，如果需要重新玩，請刷新");
return;
}
if (x >= 0 && x < 15 && y >= 0 && y < 15) {
if (chess == 1) {
context.drawImage(img_w, x * 40 + 20, y * 40 + 20);//繪制白棋
chessData[x][y] = 1;
}
else {
context.drawImage(img_b, x * 40 + 20, y * 40 + 20);
chessData[x][y] = 2;
}
judge(x, y, chess);
}
}
function judge(x, y, chess) {//判斷該局棋盤是否贏了
var count1 = 0;
var count2 = 0;
var count3 = 0;
var count4 = 0;
//左右判斷
for (var i = x; i >= 0; i--) {
if (chessData
[y] != chess) {
break;
}
count1++;
}
for (var i = x + 1; i < 15; i++) {
if (chessData
[y] != chess) {
break;
}
count1++;
}
//上下判斷
for (var i = y; i >= 0; i--) {
if (chessData[x]
!= chess) {
break;
}
count2++;
}
for (var i = y + 1; i < 15; i++) {
if (chessData[x]
!= chess) {
break;
}
count2++;
}
//左上右下判斷
for (var i = x, j = y; i >= 0, j >= 0; i--, j--) {
if (chessData
[j] != chess) {
break;
}
count3++;
}
for (var i = x + 1, j = y + 1; i < 15, j < 15; i++, j++) {
if (chessData
[j] != chess) {
break;
}
count3++;
}
//右上左下判斷
for (var i = x, j = y; i >= 0, j < 15; i--, j++) {
if (chessData
[j] != chess) {
break;
}
count4++;
}
for (var i = x + 1, j = y - 1; i < 15, j >= 0; i++, j--) {
if (chessData
[j] != chess) {
break;
}
count4++;
}
if (count1 >= 5 || count2 >= 5 || count3 >= 5 || count4 >= 5) {
if (chess == 1) {
alert("白棋贏了");
}
else {
alert("黑棋贏了");
}
isWell = true;//設置該局棋盤已經贏了，不可以再走了
}
}
</script>
< /head>
< body onload="drawRect()">
<div>
<canvas width="640" id="canvas" onmousedown="play(event)" height="640">你的瀏覽器不支持HTML5 canvas，請使用 google chrome 瀏覽器 打開.
</canvas>
</div>
< /body>
< /html>
