利用js canvas實現五子棋游戲
本文實例為大家分享了canvas實現五子棋游戲的具體代碼，供大家參考，具體內容如下
html部分
<!DOCTYPE html><html lang='en'><head> <meta charset='UTF-8'> <meta name='viewport' content='width=device-width, initial-scale=1.0'> <title>Document</title></head><body style='margin: 0;'> <canvas id='five'></canvas> <h1 style='font-size: 40px;font-weight: bolder;margin-left: 200px;margin-top: 0;margin-bottom: 0;'>五子棋</h1> <h2 id='currole'>輪到:黑</h2> <div style='font-size: 40px;font-weight: bolder;margin-left: 200px;'>勝者:</div></body><script> let cav = document.getElementById(’five’) let ctx = cav.getContext(’2d’) let k = 50 //倍數 let r = k/4 cav.width = cav.height = 16*k ctx.strokeStyle='#000000'; for(let i = 0;i<15;i++){ ctx.beginPath(); ctx.moveTo((i+1)*k,k); ctx.lineTo((i+1)*k,15*k); ctx.stroke(); } for(let i = 0;i<15;i++){ ctx.beginPath(); ctx.moveTo(k,(i+1)*k); ctx.lineTo(15*k,(i+1)*k); ctx.stroke(); } function initer(event){ let x = event.offsetX - k let y = event.offsetY - k let xclose = close(x,0,14) let yclose = close(y,0,14) let nodearr = [] let minxd = Math.abs(x-xclose[0]*k)<Math.abs(x-xclose[1]*k)? Math.abs(x-xclose[0]*k)<r?xclose[0]*k:undefined : Math.abs(x-xclose[1]*k)<r?xclose[1]*k:undefined let maxyd = Math.abs(y-yclose[0]*k)<Math.abs(y-yclose[1]*k)? Math.abs(y-yclose[0]*k)<r?yclose[0]*k:undefined : Math.abs(y-yclose[1]*k)<r?yclose[1]*k:undefined if((minxd!==undefined)&&(maxyd!==undefined)){ nodearr = [minxd,maxyd] } if(nodearr.length!==0){ setNode(nodearr) } } cav.addEventListener('click',initer) function close(coo,lort,rorb){ coo<0?coo=0:coo=coo coo>14*k?coo=14*k:coo=coo let dect = rorb - lort if(dect===1){ return [lort,rorb] }else{ if(coo<(lort+Math.ceil(dect/2))*k){let nlort=lortlet nrorb=lort+Math.ceil(dect/2)return close(coo,nlort,nrorb) }else{let nlort=lort+Math.ceil(dect/2)let nrorb=rorbreturn close(coo,nlort,nrorb) } } } let colorflag = 0 function setNode(arr){ if(gomoku[arr[0]/k][arr[1]/k]!==undefined){ return } if(colorflag===0){ ctx.fillStyle='black' ctx.beginPath(); ctx.arc(arr[0]+k,arr[1]+k,r,0,2*Math.PI); ctx.stroke(); ctx.fill(); checkFinish([arr[0]/k,arr[1]/k]) gomoku[arr[0]/k][arr[1]/k] = colorflag colorflag = 1 document.getElementById(’currole’).innerHTML='輪到:白' }else{ ctx.fillStyle='white' ctx.beginPath(); ctx.arc(arr[0]+k,arr[1]+k,r,0,2*Math.PI); ctx.stroke(); ctx.fill(); checkFinish([arr[0]/k,arr[1]/k]) gomoku[arr[0]/k][arr[1]/k] = colorflag colorflag = 0 document.getElementById(’currole’).innerHTML='輪到:黑' } }</script><script src='http://www.hdgsjgj.cn/bcjs/five.js'></script></html>
外部js文件部分
let gomoku = new Array(15)for(let i = 0;i<gomoku.length;i++){ gomoku[i]=new Array(15)}//black 0 white 1function checkFinish(curnode){ for(let i =0;i<4;i++){ let totalLength = 1 let aflag = true let bflag = true for(let j=0;j<4;j++){ let dictNum = j+1 switch(i){case 0: if(aflag){ (gomoku[curnode[0]+dictNum][curnode[1]]===colorflag) &&((curnode[0]+dictNum)<=14)? totalLength++:aflag=false } if(bflag){ (gomoku[curnode[0]-dictNum][curnode[1]]===colorflag) &&((curnode[0]-dictNum)>=0)? totalLength++:bflag=false } break;case 1: if(aflag){ (gomoku[curnode[0]][curnode[1]+dictNum]===colorflag) &&((curnode[1]+dictNum)<=14)? totalLength++:aflag=false } if(bflag){ (gomoku[curnode[0]][curnode[1]-dictNum]===colorflag) &&((curnode[1]-dictNum)>=0)? totalLength++:bflag=false } break;case 2: if(aflag){ (gomoku[curnode[0]+dictNum][curnode[1]+dictNum]===colorflag) &&((curnode[1]+dictNum)<=14) &&((curnode[0]+dictNum)<=14)? totalLength++:aflag=false } if(bflag){ (gomoku[curnode[0]-dictNum][curnode[1]-dictNum]===colorflag) &&((curnode[1]-dictNum)>=0) &&((curnode[0]-dictNum)>=0)? totalLength++:bflag=false } break;case 3: if(aflag){ (gomoku[curnode[0]+dictNum][curnode[1]-dictNum]===colorflag) &&((curnode[1]-dictNum)>=0) &&((curnode[0]+dictNum)<=14)? totalLength++:aflag=false } if(bflag){ (gomoku[curnode[0]-dictNum][curnode[1]+dictNum]===colorflag) &&((curnode[1]+dictNum)<=14) &&((curnode[0]-dictNum)>=0)? totalLength++:bflag=false } break; } if(totalLength>=5){if(colorflag===0){ document.getElementById(’res’).innerHTML=’勝者:黑方’ cav.removeEventListener('click',initer)}else{ document.getElementById(’res’).innerHTML=’勝者:白方’ cav.removeEventListener('click',initer)}break; } if((aflag===false)&&(bflag===false)){break; } } if(totalLength>=5){ break; } }}//all work and no play makes jack a dull boy
以上就是本文的全部內容，希望對大家的學習有所幫助，也希望大家多多支持好吧啦網。
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