本文实例为大家分享了canvas实现五子棋小游戏的具体代码，供大家参考，具体内容如下
效果
思路
canvans 绘制棋盘，绘制时候边缘预留棋子位置 监听点击事件绘制落子并记录到字典中 获胜判定，在四个方向上检测是否有足够数量的连贯棋子
代码
<!DOCTYPE html>
< html lang = "en" >
< head >
< meta charset = "UTF-8" >
< title >ym</ title >
< style >
canvas {
display: block;
margin: 0 auto;
border: 0
}
.result {
text-align: center;
}
button{
display: block;
margin: 0 auto;
padding: 4px 20px;
border:0;
color: #fff;
outline: none;
border-radius: 3px;
background: #43a6ff
}
button:hover{
font-weight: bold;
cursor: pointer;
}
</ style >
</ head >
< body >
< canvas id = "cv" width = "200px" height = "200px" ></ canvas >
< p class = "result" ></ p >
< button onclick = "loadPanel(400, 400,30,13)" >刷新</ button >
< script >
loadPanel(400, 400,30,13);
/**
* 1) 点击落子并切换执子者
* 2）以当前落子位置为基准，以‘米'字型判定，是否能构成五连及以上
* @param w 棋盘宽度
* @param h 棋盘高度
* @param cs 格子尺寸
* @param ps 棋子半径
*/
function loadPanel(w, h, cs, ps) {
let i, j, k;
let chks = [[1, 0], [0, 1], [1, 1], [1, -1]];//水平，纵向，斜下，斜上 四个方向
let successNum = 5;//赢棋标准
let resultEl = document.querySelector('.result');
//1)绘制棋盘,边缘应隔开棋子半径的距离
cs = cs || 16;//默认格子宽高
ps = ps || 4;//棋子半径
h = h || w;//高度默认等于宽度
let el = document.getElementById('cv');
el.setAttribute('width', w + 'px');
el.setAttribute('height', h + 'px');
let context = el.getContext("2d");
//计算棋盘分割，向下取整
let splitX = ~~((w - 2 * ps) / cs), splitY = ~~((h - 2 * ps) / cs);
//初始化落子位置使用字典存储，相较于数组简单且减少内存占用
let pieces = {};
//循环划线
context.translate(ps, ps);
context.beginPath();
context.strokeStyle = '#000';
//垂直线
for (i = 0; i < splitX + 1; i++) {
context.moveTo(cs * i, 0);
context.lineTo(cs * i, splitY * cs);
context.stroke();
}
//水平线
for ( j = 0 ; j < splitY + 1; j++) {
context.moveTo(0, cs * j);
context.lineTo(splitX * cs, cs * j);
context.stroke();
}
context.closePath();
let user = 0 , colors = ['#000', '#fefefe'];
el.addEventListener('click', function (e) {
let x = e .offsetX,
y = e .offsetY,
//计算落子范围
rx = ~~((x - ps) / cs) + (((x - ps) % cs <= cs / 2) ? 0 : 1),
ry = ~~((y - ps) / cs) + (((y - ps) % cs <= cs / 2) ? 0 : 1);
//绘制棋子
context.beginPath();
context.arc(cs * rx, cs * ry, ps, 2 * Math.PI, false);
context.fillStyle = colors [user];
context.strokeStyle = '#000' ;
user ? user = 0 : user = 1 ;//切换执子者
context.fill();
context.stroke();
context.closePath();
//记录棋子位置
let piece = pieces [rx + '-' + ry] = user;
//米字型计算结果，以当前落子位置计算是否存在某个方向上具有连续的五个相同棋子
for ( j = 0 ; j < chks.length; j++) {
let num = 1 , chk = chks [j];
for ( i = 1 ; i <= 4; i++) {
if (pieces[(rx + chk[0] * i) + '-' + (ry + chk[1] * i)] == piece) {
num++
} else {
for (i = -1; i >= -4; i--) {
if (pieces[(rx + chk[0] * i) + '-' + (ry + chk[1] * i)] == piece) {
num++
}
}
break
}
}
if (num == successNum) {
resultEl.innerHTML = ['白', '黑'][user] + '方赢';
break;
}
}
})
}
</ script >
</ body >
</ html >
以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持服务器之家。原文链接：https://blog.csdn.net/weixin_43954962/article/details/112863298
查看更多关于js canvas实现五子棋小游戏的详细内容...