本文實例講述了JS+canvas實現的五子棋游戲。分享給大家供大家參考，具體如下：
運行效果圖：
html代碼如下：
<!DOCTYPE html><html> <head> <meta charset="utf-8" /> <title>五子棋</title> <link rel="stylesheet" type="text/css" href="css/style.css" rel="external nofollow" /> </head> <body> <canvas id="chess" width="450px" height="450px"></canvas> <div id='restart' class="restart"> <span>重新開始</span> </div> <script src="js/script.js" type="text/javascript" charset="utf-8"></script> </body></html>
style.css代碼如下：
canvas{ display: block; margin: 50px auto; box-shadow: -2px -2px 2px #efefef, 5px 5px 5px #b9b9b9;}.restart{ text-align: center;}.restart>span{ display: inline-block; padding: 10px 20px; color: #fff; background-color: #45c01a; border-radius: 5px;}script.js代碼如下：
var over = false;var me = true; //我var chressBord = [];//棋盤for(var i = 0; i < 15; i++){ chressBord[i] = []; for(var j = 0; j < 15; j++){ chressBord[i][j] = 0; }}//贏法的統計數組var myWin = [];var computerWin = [];//贏法數組var wins = [];for(var i = 0; i < 15; i++){ wins[i] = []; for(var j = 0; j < 15; j++){ wins[i][j] = []; }}var count = 0; //贏法總數//橫線贏法for(var i = 0; i < 15; i++){ for(var j = 0; j < 11; j++){ for(var k = 0; k < 5; k++){ wins[i][j+k][count] = true; } count++; }}//豎線贏法for(var i = 0; i < 15; i++){ for(var j = 0; j < 11; j++){ for(var k = 0; k < 5; k++){ wins[j+k][i][count] = true; } count++; }}//正斜線贏法for(var i = 0; i < 11; i++){ for(var j = 0; j < 11; j++){ for(var k = 0; k < 5; k++){ wins[i+k][j+k][count] = true; } count++; }}//反斜線贏法for(var i = 0; i < 11; i++){ for(var j = 14; j > 3; j--){ for(var k = 0; k < 5; k++){ wins[i+k][j-k][count] = true; } count++; }}for(var i = 0; i < count; i++){ myWin[i] = 0; computerWin[i] = 0;}var chess = document.getElementById("chess");var context = chess.getContext('2d');context.strokeStyle = '#bfbfbf'; //邊框顏色var logo = new Image();logo.src = 'img/logo.png';logo.onload = function(){ context.drawImage(logo,0,0,450,450); drawChessBoard();}document.getElementById("restart").onclick = function(){ window.location.reload();}chess.onclick = function(e){ if(over){ return; } if(!me){ return; } var x = e.offsetX; var y = e.offsetY; var i = Math.floor(x / 30); var j = Math.floor(y / 30); if(chressBord[i][j] == 0){ oneStep(i,j,me); chressBord[i][j] = 1;//我 for(var k = 0; k < count; k++){ if(wins[i][j][k]){ myWin[k]++; computerWin[k] = 6;//這個位置對方不可能贏了 if(myWin[k] == 5){ window.alert('你贏了'); over = true; } } } if(!over){ me = !me; computerAI(); } }}//計算機下棋var computerAI = function (){ var myScore = []; var computerScore = []; var max = 0; var u = 0, v = 0; for(var i = 0; i < 15; i++){ myScore[i] = []; computerScore[i] = []; for(var j = 0; j < 15; j++){ myScore[i][j] = 0; computerScore[i][j] = 0; } } for(var i = 0; i < 15; i++){ for(var j = 0; j < 15; j++){ if(chressBord[i][j] == 0){ for(var k = 0; k < count; k++){ if(wins[i][j][k]){ if(myWin[k] == 1){ myScore[i][j] += 200; }else if(myWin[k] == 2){ myScore[i][j] += 400; }else if(myWin[k] == 3){ myScore[i][j] += 2000; }else if(myWin[k] == 4){ myScore[i][j] += 10000; } if(computerWin[k] == 1){ computerScore[i][j] += 220; }else if(computerWin[k] == 2){ computerScore[i][j] += 420; }else if(computerWin[k] == 3){ computerScore[i][j] += 2100; }else if(computerWin[k] == 4){ computerScore[i][j] += 20000; } } } if(myScore[i][j] > max){ max = myScore[i][j]; u = i; v = j; }else if(myScore[i][j] == max){ if(computerScore[i][j] > computerScore[u][v]){ u = i; v = j; } } if(computerScore[i][j] > max){ max = computerScore[i][j]; u = i; v = j; }else if(computerScore[i][j] == max){ if(myScore[i][j] > myScore[u][v]){ u = i; v = j; } } } } } oneStep(u,v,false); chressBord[u][v] = 2; for(var k = 0; k < count; k++){ if(wins[u][v][k]){ computerWin[k]++; myWin[k] = 6;//這個位置對方不可能贏了 if(computerWin[k] == 5){ window.alert('計算機贏了'); over = true; } } } if(!over){ me = !me; }}//繪畫棋盤var drawChessBoard = function(){ for(var i = 0; i < 15; i++){ context.moveTo(15 + i * 30 , 15); context.lineTo(15 + i * 30 , 435); context.stroke(); context.moveTo(15 , 15 + i * 30); context.lineTo(435 , 15 + i * 30); context.stroke(); }}//畫旗子var oneStep = function(i,j,me){ context.beginPath(); context.arc(15 + i * 30, 15 + j * 30, 13, 0, 2 * Math.PI);//畫圓 context.closePath(); //漸變 var gradient = context.createRadialGradient(15 + i * 30 + 2, 15 + j * 30 - 2, 13, 15 + i * 30 + 2, 15 + j * 30 - 2, 0); if(me){ gradient.addColorStop(0,'#0a0a0a'); gradient.addColorStop(1,'#636766'); }else{ gradient.addColorStop(0,'#d1d1d1'); gradient.addColorStop(1,'#f9f9f9'); } context.fillStyle = gradient; context.fill();}PS：這里再為大家推薦另一款本站的js版五子棋游戲供大家參考（其AI相對簡單一些）
在線五子棋游戲：
http://tools.VeVB.COm/games/wuziqi
更多關于JavaScript相關內容感興趣的讀者可查看本站專題：《JavaScript數據結構與算法技巧總結》、《JavaScript數學運算用法總結》、《JavaScript切換特效與技巧總結》、《JavaScript查找算法技巧總結》、《JavaScript動畫特效與技巧匯總》、《JavaScript錯誤與調試技巧總結》及《JavaScript遍歷算法與技巧總結》
希望本文所述對大家JavaScript程序設計有所幫助。
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