五子棋

效果

 

 

html代码

<canvas id="chess" width="450px" height="450px" ></canvas>

css代码

canvas {
    display: block;
    margin: 50px auto;
    box-shadow: -2px -2px 2px #efefef, 5px 5px 5px #b9b9b9;
}

js代码

var chessBoard = [];//二维数组，表示是否已落子，0未落，1己方，2敌方
var me = true;//落子是己方还是敌方

for (var i=0; i<15; i++) {
    chessBoard[i] = [];
    for (var j=0; j<15; j++){
        chessBoard[i][j] = 0;
    }
}

var chess = document.getElementById("chess");
var context = chess.getContext("2d");

context.strokeStyle = "#BFBFBF";

//画img
var logo = new Image();
logo.src = "images/logo.png";
logo.onload = function(){
    context.drawImage(logo, 0, 0, 450, 450);
    drawChessBoard();
}

//画表格
var drawChessBoard = function() {
    for (var i = 0; i<15; i++) {
        context.moveTo(15 + i*30, 15);
        context.lineTo(15 + i*30, 435);
        context.stroke(); //描边

        context.moveTo(15, 15 + i*30);
        context.lineTo(435, 15 + i*30);
        context.stroke();
    }
}

//每一步的落子
var oneStep = function (i, j, me) {
    context.beginPath();
    context.arc(15 + i*30, 15+j*30, 13, 0, 2* Math.PI);//圆心坐标， 半径，起始弧度，终止弧度
    context.closePath();
    var gradient = context.createRadialGradient(15 + i*30 + 2, 15+j*30 - 2, 13, 15 + i*30 + 2, 15+j*30 - 2, 0);//两个圆心坐标和半径
    if (me) {
        gradient.addColorStop(0, "#0a0a0a");//百分比，颜色
        gradient.addColorStop(1, "#636766");//百分比，颜色
    } else {
        gradient.addColorStop(0, "#d1d1d1");//百分比，颜色
        gradient.addColorStop(1, "#f9f9f9");//百分比，颜色
    }
    context.fillStyle = gradient;
    context.fill();//填充颜色
}

chess.onclick = function(e) {
    var x = e.offsetX;
    var y = e.offsetY;
    var i = Math.floor(x / 30);
    var j = Math.floor(y / 30);
    
    if (chessBoard[i][j] == 0) {
        oneStep(i, j, me);
        if (me) {
            chessBoard[i][j] = 1;
        } else {
            chessBoard[i][j] = 2;
        }
        me = !me;
    }
}