HTML5 利用canvas构建 Web五子棋游戏程序设计
- <!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;//设置是否该轮到白棋
- var isWell = false;//设置该局棋盘是否赢了,如果赢了就不能再走了
- var img_b = new Image();
- img_b.src = "p_w_picpaths/b.png";//白棋图片
- var img_w = new Image();
- img_w.src = "p_w_picpaths/w.png";//黑棋图片
- var chessData = new Array(15);//这个为棋盘的二维数组用来保存棋盘信息,初始化0为没有走过的,1为白棋走的,2为黑棋走的
- 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() {//页面加载完毕调用函数,初始化棋盘
- canvas = document.getElementById("canvas");
- context = canvas.getContext("2d");
- for (var i = 0; i <= 640; i += 40) {//绘制棋盘的线
- 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) {//鼠标点击时发生
- var x = parseInt((e.clientX - 20) / 40);//计算鼠标点击的区域,如果点击了(65,65),那么就是点击了(1,1)的位置
- var y = parseInt((e.clientY - 20) / 40);
- if (chessData[x][y] != 0) {//判断该位置是否被下过了
- alert("你不能在这个位置下棋");
- return;
- }
- if (isWhite) {
- isWhite = false;
- drawChess(1, x, y);
- }
- else {
- isWhite = true;
- drawChess(2, x, y);
- }
- }
- function drawChess(chess, x, y) {//参数为,棋(1为白棋,2为黑棋),数组位置
- if (isWell == true) {
- alert("已经结束了,如果需要重新玩,请刷新");
- return;
- }
- if (x >= 0 && x < 15 && y >= 0 && y < 15) {
- if (chess == 1) {
- context.drawImage(img_w, x * 40 + 20, y * 40 + 20);//绘制白棋
- 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) {//判断该局棋盘是否赢了
- var count1 = 0;
- var count2 = 0;
- var count3 = 0;
- var count4 = 0;
- //左右判断
- for (var i = x; i >= 0; i--) {
- if (chessData[i][y] != chess) {
- break;
- }
- count1++;
- }
- for (var i = x + 1; i < 15; i++) {
- if (chessData[i][y] != chess) {
- break;
- }
- count1++;
- }
- //上下判断
- for (var i = y; i >= 0; i--) {
- if (chessData[x][i] != chess) {
- break;
- }
- count2++;
- }
- for (var i = y + 1; i < 15; i++) {
- if (chessData[x][i] != chess) {
- break;
- }
- count2++;
- }
- //左上右下判断
- for (var i = x, j = y; i >= 0, j >= 0; i--, j--) {
- if (chessData[i][j] != chess) {
- break;
- }
- count3++;
- }
- for (var i = x + 1, j = y + 1; i < 15, j < 15; i++, j++) {
- if (chessData[i][j] != chess) {
- break;
- }
- count3++;
- }
- //右上左下判断
- for (var i = x, j = y; i >= 0, j < 15; i--, j++) {
- if (chessData[i][j] != chess) {
- break;
- }
- count4++;
- }
- for (var i = x + 1, j = y - 1; i < 15, j >= 0; i++, j--) {
- if (chessData[i][j] != chess) {
- break;
- }
- count4++;
- }
- if (count1 >= 5 || count2 >= 5 || count3 >= 5 || count4 >= 5) {
- if (chess == 1) {
- alert("白棋赢了");
- }
- else {
- alert("黑棋赢了");
- }
- isWell = true;//设置该局棋盘已经赢了,不可以再走了
- }
- }
- </script>
- </head>
- <body onload="drawRect()">
- <div>
- <canvas width="640" id="canvas" onmousedown="play(event)" height="640">你的浏览器不支持HTML5 canvas ,请使用 google chrome 浏览器 打开.
- </canvas>
- </div>
- </body>
- </html>
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