JS+canvas 오목 인간 과 컴퓨터 의 대전 실현 절차 에 대한 상세 한 설명

function Gobang () {
  this.over = false; //     
  this.player = true; // true:  false:  
  this.allChesses = []; //     
  this.existChesses = [] //        
  this.winsCount = 0; //     
  this.wins = []; //       
  this.myWins = []; //      
  this.computerWins = []; //      
}

//   
Gobang.prototype.init = function(opts) {
  //   canvas  
  this.createCanvas(opts);

  //      
  this.boardInit();

  //           
  this.mouseMove();

  //     
  this.algorithmInit();

  //      
  this.dorpChess();
}

//   
//  canvas
Gobang.prototype.createCanvas = function(opts) {
  var opts = opts || {};
  if (opts.width && opts.width%30 !== 0) throw new RangeError(opts.width+'  30   ');
  this.col = (opts.width && opts.width/30) || 15; //    

  var oCanvas = document.createElement('canvas');
  oCanvas.width = oCanvas.height = opts.width || 450;
  this.canvas = oCanvas;
  document.querySelector(opts.container || 'body').appendChild(this.canvas);
  this.ctx = oCanvas.getContext('2d');
}

//     
Gobang.prototype.boardInit = function(opts){
  this.drawBoard();
}

//    
Gobang.prototype.drawBoard = function(){
  this.ctx.strokeStyle = "#bfbfbf";
  for (var i = 0; i < this.col; i++) {
    this.ctx.moveTo(15+ 30*i, 15);
    this.ctx.lineTo(15+ 30*i, this.col*30-15);
    this.ctx.stroke();
    this.ctx.moveTo(15, 15+ 30*i);
    this.ctx.lineTo(this.col*30-15, 15+ 30*i);
    this.ctx.stroke();
  }
}

//    
Gobang.prototype.drawChess = function(x, y, player){
  var x = 15 + x * 30,
    y = 15 + y * 30;
  this.ctx.beginPath();
  this.ctx.arc(x, y, 13, 0, Math.PI*2);
  var grd = this.ctx.createRadialGradient(x + 2, y - 2, 13 , x + 2, y - 2, 0);
  if (player) { //  ==    
    grd.addColorStop(0, '#0a0a0a');
    grd.addColorStop(1, '#636766');
  }else{ //   ==   
    grd.addColorStop(0, '#d1d1d1');
    grd.addColorStop(1, '#f9f9f9');
  }
  this.ctx.fillStyle = grd;
  this.ctx.fill()
}

//            ,            ,       canvas
Gobang.prototype.mouseMove = function(){
  var that = this;
  this.canvas.addEventListener('mousemove', function (e) {
    that.ctx.clearRect(0, 0, that.col*30, that.col*30);
    var x = Math.floor((e.offsetX)/30),
      y = Math.floor((e.offsetY)/30);

    //    
    that.drawBoard();

    //      
    that.focusChess(x, y);

    //         
    that.redrawedChess()
  });
}

//      
Gobang.prototype.focusChess = function(x, y){
  this.ctx.beginPath();
  this.ctx.fillStyle = '#E74343';
  this.ctx.arc(15 + x * 30, 15 + y * 30, 6, 0, Math.PI*2);
  this.ctx.fill();
}

//         
Gobang.prototype.redrawedChess = function(x, y){
  for (var i = 0; i < this.existChesses.length; i++) {
    this.drawChess(this.existChesses[i].x, this.existChesses[i].y, this.existChesses[i].player);
  }
}

//     
Gobang.prototype.algorithmInit = function(){
  //             
  for (var x = 0; x < this.col; x++) {
    this.allChesses[x] = [];
    this.wins[x] = [];
    for (var y = 0; y < this.col; y++) {
      this.allChesses[x][y] = false;
      this.wins[x][y] = [];
    }
  }
  //      
  this.computedWins();

  //                    
  for (var i = 0; i < this.winsCount; i++) {
    this.myWins[i] = 0;
    this.computerWins[i] = 0;
  }
}

Gobang.prototype.computedWins = function(){
  /*
        
     15   
  */
  for (var x = 0; x < this.col; x++) { //      
    for (var y = 0; y < this.col-4; y ++) {
      this.winsCount ++; 

      /*
         ： 
        1.        
          [0,0]
          [0,1]
          [0,2]
          [0,3]
          [0,4]
        
        2.        
          [0,1]
          [0,2]
          [0,3]
          [0,4]
          [0,5]
                  11   ，     x 15      11 ，       15 * 11 
      */
      //  for                
      for (var k = 0; k < 5; k ++) {
        this.wins[x][y+k][this.winsCount] = true;
        /*
              
                  ：
            this.wins = [
                    [
                      [1:true],
                      [1:true],
                      [1:true],
                      [1:true],
                      [1:true]
                    ],
                    [
                      ......
                    ]
                  ]

                      ,             
                this.wins[0][0][1], this.wins[0][4][1], this.wins[0][5][1], this.wins[0][6][1], this.wins[0][7][1]
            
                      ：
              var obj = {
                a: 10,
                b: 'demo'
              }
              obj['a'] === obj.a

                    this.wins[0][0].1, this.wins[0][8].1, this.wins[0][9].1, this.wins[0][10].1, this.wins[0][11].1 

                      ，      

                 this.wins[0][0].1          x=0, y=0,        
                this.wins[0][12].1          x=0, y=1,        
                ......

              this.wins[0][0],this.wins[0][13]...      this.wins[x][y]
                        : [0,0] [0,1] [0,2] [0,3] [0,4] 
        */
      }
    }
  }

  for (var y = 0; y < this.col; y++) { //      ,        ，  15 * 11 
    for (var x = 0; x < this.col-4; x ++) {
      this.winsCount ++;
      for (var k = 0; k < 5; k ++) {
        this.wins[x+k][y][this.winsCount] = true;
      }
    }
  }

  /*
        
  */
  for (var x = 0; x < this.col-4; x++) { //   ->               11 * 11 
    for (var y = 0; y < this.col-4; y ++) {
      this.winsCount ++;

      /*
       :
      1. [0,0]
        [1,1]
        [2,2]
        [3,3]
        [4,4]
      
      2. [0,1]
        [1,2]
        [2,3]
        [3,4]
        [4,5]

      3. [0,2]
        [1,3]
        [2,4]
        [3,5]
        [4,6]
      ...

        [1,0]
        [2,1]
        [3,2]
        [4,3]
        [5,5]

                     

      */

      for (var k = 0; k < 5; k ++) {
        this.wins[x+k][y+k][this.winsCount] = true;
      }
    }
  }

  for (var x = this.col-1; x >= 4; x --) { //  ->               11 * 11 
    for (var y = 0; y < this.col-4; y ++) {
      this.winsCount ++;
      for (var k = 0; k < 5; k ++) {
        this.wins[x-k][y+k][this.winsCount] = true;
      }
    }
  }
}

//    
Gobang.prototype.dorpChess = function(){
  var that = this;
  this.canvas.addEventListener('click', function(e) {
    //       
    if (that.over) return;

    var x = Math.floor((e.offsetX)/30),
      y = Math.floor((e.offsetY)/30);

    //          
    if (that.allChesses[x][y]) return;

    //       
    that.checkChess(x, y)

    if (!that.over) {
      that.player = false;
      that.computerDropChess();//     
    }
  })
}


//      
Gobang.prototype.checkChess = function(x, y){
  //  
  this.drawChess(x, y, this.player);
  //       
  this.existChesses.push({
    x: x,
    y: y,
    player: this.player
  });
  //       true,      
  this.allChesses[x][y] = true;

  this.currWinChesses(x, y, this.player);
}

//                  
Gobang.prototype.currWinChesses = function(x, y, player){
  var currObj = player ? this.myWins : this.computerWins;
  var enemyObj = player ? this.computerWins : this.myWins;
  var currText = player ? ' ' : '  ';
  for (var i = 1; i <= this.winsCount; i++) {
    if (this.wins[x][y][i]) { //        1               1
      currObj[i-1] ++; //                  ;

      enemyObj[i-1] = 6; //       ,                  ，   6      5

      if (currObj[i-1] === 5) { //    5    ,      
        alert(currText+'  ')
        this.over = true;
      }
    }
  }
}

//      
Gobang.prototype.computerDropChess = function(){
  var myScore = [], //    
    computerScore = [], //     
    maxScore = 0; //    
  

  //     
  var scoreInit = function(){
    for( var x = 0; x < this.col; x ++) { 
      myScore[x] = [];
      computerScore[x] = [];
      for (var y = 0; y < this.col; y ++) {
        myScore[x][y] = 0;
        computerScore[x][y] = 0;
      }
    }
  }
  scoreInit.call(this);

  //         
  var x = 0, y = 0; 

  //                         
  function formatScore(o, n) { 
    if (o < 6 && o > 0) {
      var n = 10;
      for (var i = 0; i < o; i++) {
        n *= 3;
      }
      return n
    }
    return 0
  }

  //            
  function existChess(arr) { 
    var existArr = [];
    for (var i = 0; i < arr.length; i++) {
      for (var j = 0; j < arr[i].length; j++) {
        if (!arr[i][j]) {
          existArr.push({x:i, y:j})
        }
      }
    }
    return existArr;
  }

  var exceptArr = existChess(this.allChesses);

  //        ，         
  for (var i = 0; i < exceptArr.length; i++) { 
    var o = exceptArr[i];

    //         
    for (var k = 0; k < this.winsCount; k++) {

      //               
      if (this.wins[o.x][o.y][k]) {

        //       ，      ，      
        //            ，         ，     
        myScore[o.x][o.y] += formatScore(this.myWins[k-1], 10);
        computerScore[o.x][o.y] += formatScore(this.computerWins[k-1], 11); 
      }
    }

    //      
    if (myScore[o.x][o.y] > maxScore) { //            ，               
      maxScore = myScore[o.x][o.y];
      x = o.x;
      y = o.y;
    }else if (myScore[o.x][o.y] === maxScore) { //             ，                ，                 ，        
      if (computerScore[o.x][o.y] > computerScore[x][y]) {
        x = o.x;
        y = o.y;
      }
    }

    //       ，        ，       
    if (computerScore[o.x][o.y] > maxScore) {
      maxScore = computerScore[o.x][o.y];
      x = o.x;
      y = o.y;
    }else if (computerScore[o.x][o.y] === maxScore) {
      if (myScore[o.x][o.y] > myScore[x][y]) {
        x = o.x;
        y = o.y;
      }
    }
  }

  this.checkChess(x, y)

  if (!this.over) {
    this.player = true;
  }
}
var gobang = new Gobang();
gobang.init()