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js实现五子棋代码分享
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本文主要和大家分享js实现五子棋代码,通过canvas绘制棋盘与棋子,通过js代码实现逻辑。
index.html代码:
<!DOCTYPE html><html><head> <meta charset="utf-8"> <title>五子棋</title> <link rel="stylesheet" type="text/css" href="css/style.css"></head><body> <canvas id="chess" width="450px" height="450px"></canvas> <p id='restart' class="restart"> <span>重新开始</span> </p> <script type="text/javascript" src="js/script.js"></script></body></html>
style.css代码:
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: #C92027; border-radius: 5px;}
script.js代码:
//判断是否结束var over = false;//判断落子方var me = true; //我var chressBord = [];//棋盘for(var i = 0; i < 15; i++){ chressBord[i] = []; for(var j = 0; j < 15; j++){ chressBord[i][j] = 0; } }//赢法的统计数组var myWin = [];var computerWin = [];//赢法数组var wins = [];for(var i = 0; i < 15; i++){ wins[i] = []; for(var j = 0; j < 15; j++){ wins[i][j] = []; } }var count = 0; //赢法总数//横线赢法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++; } }//竖线赢法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++; } }//正斜线赢法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++; } }//反斜线赢法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; }//获得canvas对象var chess = document.getElementById("chess");var context = chess.getContext('2d'); context.strokeStyle = '#bfbfbf'; //边框颜色var logo = new Image(); logo.src = 'images/logo.jpg'; 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;//这个位置对方不可能赢了 if(myWin[k] == 5){ window.alert('你赢了'); over = true; } } } if(!over){ me = !me; computerAI(); } } }//计算机下棋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;//这个位置对方不可能赢了 if(computerWin[k] == 5){ window.alert('计算机赢了'); over = true; } } } if(!over){ me = !me; } }//绘画棋盘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(); } }//画旗子var oneStep = function(i,j,me){ context.beginPath(); context.arc(15 + i * 30, 15 + j * 30, 13, 0, 2 * Math.PI);//画圆 context.closePath(); //渐变 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(); }
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