首页
所有分类
TAGS
文字工具 EMOJI BIBLE
编程 Javascript

canvas 实现中国象棋

Posted in Javascript onFebruary 17, 2017

效果如下：

canvas 实现中国象棋

代码如下：

<!DOCTYPE html>
<html>
 <head>
 <meta charset="utf-8">
 <title></title>
 <style>
 #canvasWrap{
  width: 600px;
  height: 550px;
  margin: 50px auto;
 }
 #currActive{
  font-size: 20px;
  font-weight: bold;
  /*text-align: center;*/
  margin-left:230px ;
 }
 #canvas{
  float: left;
  background: #EAC591;
 }
 #panel{
  width: 80px;
  padding: 10px;
  float: right;
 }
 #ul{
  list-style: none;
  margin: 0;
  padding: 0;
 }
 #ul li{
  padding: 2px;
 }
 </style>
 <script src="http://libs.baidu.com/jquery/1.9.1/jquery.min.js"></script>
 </head>
 <body>
 <div id="canvasWrap">
  <div id="currActive"></div>
  <canvas id="canvas" width="500" height="550"></canvas>
  <div id="panel">
  <ul id="ul"></ul>
  </div>
 </div>
 <script>
  var obj = {};
  // 初始化
  obj.init = function(args){
  var canvas = document.getElementById("canvas");
  this.ctx = canvas.getContext("2d");
//  this.chunk =args&&args.chunk?args.chunk:50; 
//  this.radius =args&&args.radius?args.radius:23; 
//  this.CandidateCircleR =args&&args.ccr?args.ccr:5;
  this.radius = 23;
  this.chunk =50;
  this.CandidateCircleR = 5;
  $("#currActive").text("红方");
  this.steps = [];      // 记录步骤
  this.currActive = "red";  // 先下
  this.init_back();
  this.init_chess();
  $(canvas).unbind();
  this.addEvent();
  }
  // 棋盘初始化
  obj.init_back = function(){
  this.drawRowLine();
  this.drawColLine();
  this.ctx.clearRect(this.chunk+1, this.chunk*5+1, this.chunk*8-2, this.chunk-2);
  this.drawsharpS();
  this.drawX();
  this.drawText();
  }
  // 棋子初始化
  obj.init_chess = function(){
  var Car_b1 = {x:1,y:1,text:"?"}
  var Horse_b1 = {x:2,y:1,text:"?"}
  var Elephant_b1 = {x:3,y:1,text:"象"}
  var Scholar_b1 = {x:4,y:1,text:"士"}
  var Boss_b = {x:5,y:1,text:"将"} 
  var Scholar_b2 = {x:6,y:1,text:"士"}
  var Elephant_b2 = {x:7,y:1,text:"象"}
  var Horse_b2 = {x:8,y:1,text:"?"}
  var Car_b2 = {x:9,y:1,text:"?"}
  var Cannon_b1 = {x:2,y:3,text:"炮"}
  var Cannon_b2 = {x:8,y:3,text:"炮"}
  var Soldier_b1 = {x:1,y:4,text:"卒"}
  var Soldier_b2 = {x:3,y:4,text:"卒"}
  var Soldier_b3 = {x:5,y:4,text:"卒"}
  var Soldier_b4 = {x:7,y:4,text:"卒"}
  var Soldier_b5 = {x:9,y:4,text:"卒"}
  var Car_r1 = {x:1,y:10,text:"?"}
  var Horse_r1 = {x:2,y:10,text:"?"}
  var Elephant_r1 = {x:3,y:10,text:"相"}
  var Scholar_r1 = {x:4,y:10,text:"仕"}
  var Boss_r = {x:5,y:10,text:"帅"} 
  var Scholar_r2 = {x:6,y:10,text:"仕"}
  var Elephant_r2 = {x:7,y:10,text:"相"}
  var Horse_r2 = {x:8,y:10,text:"?"}
  var Car_r2 = {x:9,y:10,text:"?"}
  var Cannon_r1 = {x:2,y:8,text:"炮"}
  var Cannon_r2 = {x:8,y:8,text:"炮"}
  var Soldier_r1 = {x:1,y:7,text:"兵"}
  var Soldier_r2 = {x:3,y:7,text:"兵"}
  var Soldier_r3 = {x:5,y:7,text:"兵"}
  var Soldier_r4 = {x:7,y:7,text:"兵"}
  var Soldier_r5 = {x:9,y:7,text:"兵"}
  this.cheer_arr_B = [Car_b1,Horse_b1,Elephant_b1,Scholar_b1,Boss_b,Scholar_b2,Elephant_b2,Horse_b2,Car_b2,
Cannon_b1,Cannon_b2,Soldier_b1,Soldier_b2,Soldier_b3,Soldier_b4,Soldier_b5];
  this.cheer_arr_R = [Car_r1,Horse_r1,Elephant_r1,Scholar_r1,Boss_r,Scholar_r2,Elephant_r2,Horse_r2,Car_r2,
Cannon_r1,Cannon_r2,Soldier_r1,Soldier_r2,Soldier_r3,Soldier_r4,Soldier_r5];
  var that = this;
  $.each(this.cheer_arr_B,function(i,e){ 
   e.color = "#000";
   e.bgcolor = "#fff";
   e.bgColor_b = "#000";
   e.type = "black";
   that.drawPiece(e);
   that.drawChessText(e);
  });
  $.each(this.cheer_arr_R,function(i,e){ 
   e.color = "#f00";
   e.bgcolor = "#fff";
   e.bgColor_b = "#f00";
   e.type = "red";
   that.drawPiece(e);
   that.drawChessText(e);
  });
  this.cheer_arr_ALL = this.cheer_arr_B.concat(this.cheer_arr_R); 
  }
  // 更新棋局
  obj.updateChess = function(){
  this.ctx.clearRect(0,0,canvas.width,canvas.height);
  this.init_back();
  var that = this;
  $.each(this.cheer_arr_ALL,function(i,e){   
   that.drawPiece(e);
   that.drawChessText(e);
  });
  $("#ul").empty();
  $.each(this.steps,function(iii,eee){
   $("#ul").append("<li>"+eee+"</li>");
  });
  }
  // 画横线
  obj.drawRowLine = function(){
  for(var i =1;i<=10;i++){
   this.drawLine(1,i,9,i);
  }
  }
  // 画竖线
  obj.drawColLine = function(){
  for(var i =1;i<=9;i++){
   this.drawLine(i,1,i,10);
  }
  }
  // 画直线
  obj.drawLine = function(x0,y0,x1,y1,lw){
  var x0 = x0*this.chunk;
  var y0 = y0*this.chunk;
  var x1 = x1*this.chunk;
  var y1 = y1*this.chunk;
  this.ctx.beginPath();
  this.ctx.strokeStyle = "#000";
  this.ctx.lineWidth =lw?lw:1;
  this.ctx.moveTo(x0,y0);
  this.ctx.lineTo(x1,y1);
  this.ctx.stroke();
  this.ctx.closePath();
  }
  // 画#
  obj.drawsharpS = function(){
  this.round(2,3);
  this.round(8,3);
  this.round(1,4);
  this.round(3,4);
  this.round(5,4);
  this.round(7,4);
  this.round(9,4);
  this.round(2,8);
  this.round(8,8);
  this.round(1,7);
  this.round(3,7);
  this.round(5,7);
  this.round(7,7);
  this.round(9,7);
  }
  // 画单个#
  obj.round = function(x0,y0){
  var x0 = x0*this.chunk;
  var y0 = y0*this.chunk;
  this.ctx.beginPath();
  this.ctx.strokeStyle = "#000";
  this.ctx.lineWidth =1;
  if(x0!=this.chunk){
   // 左上
   this.ctx.moveTo(x0-5,y0-10);
   this.ctx.lineTo(x0-5,y0-5);
   this.ctx.lineTo(x0-10,y0-5);
   // 左下
   this.ctx.moveTo(x0-5,y0+10);
   this.ctx.lineTo(x0-5,y0+5);
   this.ctx.lineTo(x0-10,y0+5);
  }
  if(x0!=this.chunk*9){
   // 右上
   this.ctx.moveTo(x0+5,y0-10);
   this.ctx.lineTo(x0+5,y0-5);
   this.ctx.lineTo(x0+10,y0-5);
   // 右下
   this.ctx.moveTo(x0+5,y0+10);
   this.ctx.lineTo(x0+5,y0+5);
   this.ctx.lineTo(x0+10,y0+5);
  }
  this.ctx.stroke();
  this.ctx.closePath(); 
  }
  // 画X
  obj.drawX = function(){
  this.drawLine(4,1,6,3,0.5);
  this.drawLine(4,3,6,1,0.5);
  this.drawLine(4,8,6,10,0.5);
  this.drawLine(4,10,6,8,0.5);
  }
  // 画楚河/?h界
  obj.drawText = function(){
  this.ctx.font = "bold 30px Courier New";
    this.ctx.fillStyle = "#000";
    this.ctx.fillText("楚 河", this.chunk*2, this.chunk*5+this.chunk/2+10);
    this.ctx.fillText("?h 界", this.chunk*6, this.chunk*5+this.chunk/2+10);
    this.ctx.font = "12px Courier New";
    this.text_arr =["九","八","七","六","五","四","三","二","一"];
    for(var i=0;i<9;i++){
    this.ctx.fillText((i+1).toString(), this.chunk*(i+1)-5, 20);
    this.ctx.fillText(this.text_arr[i], this.chunk*(i+1)-5, this.chunk*10+30+10);
    }
  }
  // 画棋子形状
  obj.drawPiece = function(e){
  this.ctx.beginPath();
  this.ctx.fillStyle =e.bgcolor;
  this.ctx.strokeStyle = e.bgColor_b;
  this.ctx.lineWidth =2;
       this.ctx.arc(e.x*this.chunk, e.y*this.chunk, this.radius, 0, Math.PI * 2, true);
       this.ctx.closePath();
       this.ctx.fill();
       this.ctx.stroke();
  }
  // 画棋子文字
  obj.drawChessText = function(e){
  this.ctx.font = "bold 30px Courier New";
    this.ctx.fillStyle = e.color;
    var offset = this.ctx.measureText(e.text).width/2;
    this.ctx.fillText(e.text, e.x*this.chunk-offset, e.y*this.chunk+10);
  }
  // 增加点击事件
  obj.addEvent = function(){
  var that = this;
  this.checked = false;
  $(canvas).on("mousedown",function(ev){
   for(var j=1;j<=10;j++){
   for(var i=1;i<=9;i++){
    var temp_i = i*that.chunk;
    var temp_j = j*that.chunk;
    var distanct = Math.sqrt(Math.pow(temp_i-ev.offsetX,2)+Math.pow(temp_j-ev.offsetY,2));
    if(distanct<=that.radius){
    var overChess = false;
    $.each(that.cheer_arr_ALL,function(ii,ee){
     if(ee.x ==i&&ee.y==j){
     overChess = true;
     var p ={x:ee.x,y:ee.y};
//     console.log(that.checked); 
     if(that.currActive != ee.type&&!that.checked){
      return false;
     }
     if(!that.checked){
//      console.log("选中一个棋子");
      that.drawChecked(p);
      that.preChess = ee;
      that.drawCandidate();
      that.checked = true;
     }else if(that.preChess.x == ee.x&&that.preChess.y == ee.y){
//      console.log("点在原棋子上");
      that.updateChess();
      that.checked = false;
     }else if(that.preChess.type == ee.type){
//      console.log("切换棋子");
      that.updateChess();
      that.drawChecked(p);
      that.preChess = ee;
      that.drawCandidate();
     }else{
      // 是否能吃子
      if(that.Eat_rule(i,j)){
      that.eat(ii,ee,i,j);
      }else if(that.preChess.text == "帅"){ // 对将
      if(that.preChess.x == i){
       var canEat =true;
       $.each(that.cheer_arr_ALL,function(iii,eee){
       if(eee.x ==that.preChess.x&&eee.y==j){
        if(eee.text == "将"){
        for(var t=that.preChess.y-1;t>j;t--){
         if(that.inArray(that.preChess.x,t)){
         canEat = false;
         break;
         }
        }
        }else{
        canEat = false;
        }
        return false;
       }
       });
       if(canEat){
       that.eat(ii,ee,i,j);
       }
      }
      }else if(that.preChess.text == "将"){
      if(that.preChess.x == i){
       var canEat =true;
       $.each(that.cheer_arr_ALL,function(iii,eee){
       if(eee.x ==that.preChess.x&&eee.y==j){
        if(eee.text == "帅"){
        for(var t=that.preChess.y+1;t<j;t++){
         if(that.inArray(that.preChess.x,t)){
         canEat = false;
         break;
         }
        }
        }else{
        canEat = false;
        }
        return false;
       }
       });
       if(canEat){
       that.eat(ii,ee,i,j);
       }
      }
      }
     } 
     return false;
     }
    });
    if(overChess){
//     alert("点在棋子上");
    }else{
     // 是否能移动
     if(that.checked&&that.Move_rule(i,j)){
//     console.log("移动棋子");
     that.move(i,j);
     }
    }
    }
   }
   }
  });
  }
  // 记谱
  obj.note = function(ee,i,j){
  var distance = Math.abs(ee.y-j);
  var step;
  if(ee.type=="red"){
   $("#currActive").text("黑方");
   var oldP = this.text_arr[ee.x-1];
   var newP = this.text_arr[i-1];
   var num = this.text_arr[9-distance];
   if(j<ee.y){
   if(ee.x == i){
    console.log(ee.text+oldP+"进"+num);
    step = ee.text+oldP+"进"+num;
   }else{
    console.log(ee.text+oldP+"进"+newP);
    step = ee.text+oldP+"进"+newP;
   }
   }else if(j>ee.y){
   if(ee.x == i){
    console.log(ee.text+oldP+"退"+num);
    step = ee.text+oldP+"退"+num;
   }else{
    console.log(ee.text+oldP+"退"+newP);
    step = ee.text+oldP+"退"+newP;
   }
   }else{
   console.log(ee.text+oldP+"平"+newP);
   step = ee.text+oldP+"平"+newP;
   }
  }else{
   $("#currActive").text("红方");
   if(j>ee.y){
   if(ee.x == i){
    console.log(ee.text+ee.x+"进"+distance);
    step = ee.text+ee.x+"进"+distance
   }else{
    console.log(ee.text+ee.x+"进"+i);
    step = ee.text+ee.x+"进"+i;
   }
   }else if(j<ee.y){
   if(ee.x == i){
    console.log(ee.text+ee.x+"退"+distance);
    step = ee.text+ee.x+"退"+distance;
   }else{
    console.log(ee.text+ee.x+"退"+i);
    step = ee.text+ee.x+"退"+i;
   }
   }else{
   console.log(ee.text+ee.x+"平"+i);
   step = ee.text+ee.x+"平"+i;
   } 
  }
  this.steps.push(step); 
  }
  // 是否结束
  obj.isOver = function(ee){
  if(ee.text == "将"){
   alert("you win");
   $("#ul").empty();
   return true;
  }else if(ee.text == "帅"){
   alert("you lose");
   $("#ul").empty();
   return true;
  }else{
   return false;
  }
  }
  // 吃子
  obj.eat = function(ii,ee,i,j){
  this.cheer_arr_ALL.splice(ii,1);
  this.move(i,j);
  if(this.isOver(ee)){
   this.ctx.clearRect(0,0,canvas.width,canvas.height);
   this.init();
   return false;
  };
  }
  // 移动
  obj.move = function(i,j){
  var that = this;
  $.each(that.cheer_arr_ALL,function(iii,eee){
   if(eee.x ==that.preChess.x&&eee.y==that.preChess.y){
   that.note(eee,i,j);
   eee.x= i;
   eee.y = j;
   that.currActive = eee.type=="red"?"black":"red";
   return false;
   }
  });
  that.updateChess();
  that.checked = false;
  }
  // 画选中棋子状态
  obj.drawChecked = function(p){
  var temp_x = p.x*this.chunk;
  var temp_y = p.y*this.chunk;
  this.ctx.beginPath();
  this.ctx.strokeStyle = "#00f";
  this.ctx.lineWidth =1;
  this.ctx.moveTo(temp_x-this.radius,temp_y-this.radius+10);
  this.ctx.lineTo(temp_x-this.radius,temp_y-this.radius);
  this.ctx.lineTo(temp_x-this.radius+10,temp_y-this.radius);
  this.ctx.moveTo(temp_x-this.radius,temp_y+this.radius-10);
  this.ctx.lineTo(temp_x-this.radius,temp_y+this.radius);
  this.ctx.lineTo(temp_x-this.radius+10,temp_y+this.radius);
  this.ctx.moveTo(temp_x+this.radius,temp_y-this.radius+10);
  this.ctx.lineTo(temp_x+this.radius,temp_y-this.radius);
  this.ctx.lineTo(temp_x+this.radius-10,temp_y-this.radius);
  this.ctx.moveTo(temp_x+this.radius,temp_y+this.radius-10);
  this.ctx.lineTo(temp_x+this.radius,temp_y+this.radius);
  this.ctx.lineTo(temp_x+this.radius-10,temp_y+this.radius);
  this.ctx.stroke();
  this.ctx.closePath(); 
  }
  // 画候选位置
  obj.drawCandidate = function(){
  switch(this.preChess.text){
   case "?":
   var temp_y = this.preChess.y;
   while(!this.inArray(this.preChess.x,++temp_y)&&temp_y<=10){
    this.drawCandidateCircle(this.preChess.x,temp_y);
   }
   var temp_y = this.preChess.y;
   while(!this.inArray(this.preChess.x,--temp_y)&&temp_y>0){
    this.drawCandidateCircle(this.preChess.x,temp_y);
   }
   var temp_x = this.preChess.x;
   while(!this.inArray(++temp_x,this.preChess.y)&&temp_x<10){
    this.drawCandidateCircle(temp_x,this.preChess.y);
   }
   var temp_x = this.preChess.x;
   while(!this.inArray(--temp_x,this.preChess.y)&&temp_x>0){
    this.drawCandidateCircle(temp_x,this.preChess.y);
   }
   break;
   case "?":
   if(!this.inArray(this.preChess.x-2,this.preChess.y-1)
   &&this.preChess.x-2>=1&&this.preChess.y-1>=1
   &&!this.inArray(this.preChess.x-1,this.preChess.y)){
    this.drawCandidateCircle(this.preChess.x-2,this.preChess.y-1);
   }
   if(!this.inArray(this.preChess.x-1,this.preChess.y-2)
   &&this.preChess.x-1>=1&&this.preChess.y-2>=1
   &&!this.inArray(this.preChess.x,this.preChess.y-1)){
    this.drawCandidateCircle(this.preChess.x-1,this.preChess.y-2);
   }
   if(!this.inArray(this.preChess.x+1,this.preChess.y-2)
   &&this.preChess.x+1<=9&&this.preChess.y-2>=1
   &&!this.inArray(this.preChess.x,this.preChess.y-1)){
    this.drawCandidateCircle(this.preChess.x+1,this.preChess.y-2);
   }
   if(!this.inArray(this.preChess.x+2,this.preChess.y-1)
   &&this.preChess.x+2<=9&&this.preChess.y-1>=1
   &&!this.inArray(this.preChess.x+1,this.preChess.y)){
    this.drawCandidateCircle(this.preChess.x+2,this.preChess.y-1);
   }
   if(!this.inArray(this.preChess.x+2,this.preChess.y+1)
   &&this.preChess.x+2<=9&&this.preChess.y+1<=10
   &&!this.inArray(this.preChess.x+1,this.preChess.y)){
    this.drawCandidateCircle(this.preChess.x+2,this.preChess.y+1);
   }
   if(!this.inArray(this.preChess.x+1,this.preChess.y+2)
   &&this.preChess.x+1<=9&&this.preChess.y+2<=10
   &&!this.inArray(this.preChess.x,this.preChess.y+1)){
    this.drawCandidateCircle(this.preChess.x+1,this.preChess.y+2);
   }
   if(!this.inArray(this.preChess.x-1,this.preChess.y+2)
   &&this.preChess.x-1>=1&&this.preChess.y+2<=10
   &&!this.inArray(this.preChess.x,this.preChess.y+1)){
    this.drawCandidateCircle(this.preChess.x-1,this.preChess.y+2);
   }
   if(!this.inArray(this.preChess.x-2,this.preChess.y+1)
   &&this.preChess.x-2>=1&&this.preChess.y+1<=10
   &&!this.inArray(this.preChess.x-1,this.preChess.y)){
    this.drawCandidateCircle(this.preChess.x-2,this.preChess.y+1);
   }
   break;
   case "相":
   if(this.preChess.y==10){
    if(!this.inArray(this.preChess.x-2,this.preChess.y-2)
    &&!this.inArray(this.preChess.x-1,this.preChess.y-1)){
    this.drawCandidateCircle(this.preChess.x-2,this.preChess.y-2);
    }
    if(!this.inArray(this.preChess.x+2,this.preChess.y-2)
    &&!this.inArray(this.preChess.x+1,this.preChess.y-1)){
    this.drawCandidateCircle(this.preChess.x+2,this.preChess.y-2);
    }
   }else if(this.preChess.y==6){
    if(!this.inArray(this.preChess.x-2,this.preChess.y+2)
    &&!this.inArray(this.preChess.x-1,this.preChess.y+1)){
    this.drawCandidateCircle(this.preChess.x-2,this.preChess.y+2);
    }
    if(!this.inArray(this.preChess.x+2,this.preChess.y+2)
    &&!this.inArray(this.preChess.x+1,this.preChess.y+1)){
    this.drawCandidateCircle(this.preChess.x+2,this.preChess.y+2);
    }
   }else if(this.preChess.x==1){
    if(!this.inArray(this.preChess.x+2,this.preChess.y-2)
    &&!this.inArray(this.preChess.x+1,this.preChess.y-1)){
    this.drawCandidateCircle(this.preChess.x+2,this.preChess.y-2);
    }
    if(!this.inArray(this.preChess.x+2,this.preChess.y+2)
    &&!this.inArray(this.preChess.x+1,this.preChess.y+1)){
    this.drawCandidateCircle(this.preChess.x+2,this.preChess.y+2);
    }
   }else if(this.preChess.x==9){
    if(!this.inArray(this.preChess.x-2,this.preChess.y-2)
    &&!this.inArray(this.preChess.x-1,this.preChess.y-1)){
    this.drawCandidateCircle(this.preChess.x-2,this.preChess.y-2);
    }
    if(!this.inArray(this.preChess.x-2,this.preChess.y+2)
    &&!this.inArray(this.preChess.x-1,this.preChess.y+1)){
    this.drawCandidateCircle(this.preChess.x-2,this.preChess.y+2);
    }
   }else{
    if(!this.inArray(this.preChess.x+2,this.preChess.y-2)
    &&!this.inArray(this.preChess.x+1,this.preChess.y-1)){
    this.drawCandidateCircle(this.preChess.x+2,this.preChess.y-2);
    }
    if(!this.inArray(this.preChess.x+2,this.preChess.y+2)
    &&!this.inArray(this.preChess.x+1,this.preChess.y+1)){
    this.drawCandidateCircle(this.preChess.x+2,this.preChess.y+2);
    }
    if(!this.inArray(this.preChess.x-2,this.preChess.y-2)
    &&!this.inArray(this.preChess.x-1,this.preChess.y-1)){
    this.drawCandidateCircle(this.preChess.x-2,this.preChess.y-2);
    }
    if(!this.inArray(this.preChess.x-2,this.preChess.y+2)
    &&!this.inArray(this.preChess.x-1,this.preChess.y+1)){
    this.drawCandidateCircle(this.preChess.x-2,this.preChess.y+2);
    }
   }
   break;
   case "象":
   if(this.preChess.y==1){
    if(!this.inArray(this.preChess.x-2,this.preChess.y+2)
    &&!this.inArray(this.preChess.x-1,this.preChess.y+1)){
    this.drawCandidateCircle(this.preChess.x-2,this.preChess.y+2);
    }
    if(!this.inArray(this.preChess.x+2,this.preChess.y+2)
    &&!this.inArray(this.preChess.x+1,this.preChess.y+1)){
    this.drawCandidateCircle(this.preChess.x+2,this.preChess.y+2);
    }
   }else if(this.preChess.y==5){
    if(!this.inArray(this.preChess.x-2,this.preChess.y-2)
    &&!this.inArray(this.preChess.x-1,this.preChess.y-1)){
    this.drawCandidateCircle(this.preChess.x-2,this.preChess.y-2);
    }
    if(!this.inArray(this.preChess.x+2,this.preChess.y-2)
    &&!this.inArray(this.preChess.x+1,this.preChess.y-1)){
    this.drawCandidateCircle(this.preChess.x+2,this.preChess.y-2);
    }
   }else if(this.preChess.x==1){
    if(!this.inArray(this.preChess.x+2,this.preChess.y-2)
    &&!this.inArray(this.preChess.x+1,this.preChess.y-1)){
    this.drawCandidateCircle(this.preChess.x+2,this.preChess.y-2);
    }
    if(!this.inArray(this.preChess.x+2,this.preChess.y+2)
    &&!this.inArray(this.preChess.x+1,this.preChess.y+1)){
    this.drawCandidateCircle(this.preChess.x+2,this.preChess.y+2);
    }
   }else if(this.preChess.x==9){
    if(!this.inArray(this.preChess.x-2,this.preChess.y-2)
    &&!this.inArray(this.preChess.x-1,this.preChess.y-1)){
    this.drawCandidateCircle(this.preChess.x-2,this.preChess.y-2);
    }
    if(!this.inArray(this.preChess.x-2,this.preChess.y+2)
    &&!this.inArray(this.preChess.x-1,this.preChess.y+1)){
    this.drawCandidateCircle(this.preChess.x-2,this.preChess.y+2);
    }
   }else{
    if(!this.inArray(this.preChess.x+2,this.preChess.y-2)
    &&!this.inArray(this.preChess.x+1,this.preChess.y-1)){
    this.drawCandidateCircle(this.preChess.x+2,this.preChess.y-2);
    }
    if(!this.inArray(this.preChess.x+2,this.preChess.y+2)
    &&!this.inArray(this.preChess.x+1,this.preChess.y+1)){
    this.drawCandidateCircle(this.preChess.x+2,this.preChess.y+2);
    }
    if(!this.inArray(this.preChess.x-2,this.preChess.y-2)
    &&!this.inArray(this.preChess.x-1,this.preChess.y-1)){
    this.drawCandidateCircle(this.preChess.x-2,this.preChess.y-2);
    }
    if(!this.inArray(this.preChess.x-2,this.preChess.y+2)
    &&!this.inArray(this.preChess.x-1,this.preChess.y+1)){
    this.drawCandidateCircle(this.preChess.x-2,this.preChess.y+2);
    }
   }
   break;
   case "仕":
   if(this.preChess.x==5&&this.preChess.y==9){
    if(!this.inArray(this.preChess.x-1,this.preChess.y-1)){
    this.drawCandidateCircle(this.preChess.x-1,this.preChess.y-1);
    }
    if(!this.inArray(this.preChess.x-1,this.preChess.y+1)){
    this.drawCandidateCircle(this.preChess.x-1,this.preChess.y+1);
    }
    if(!this.inArray(this.preChess.x+1,this.preChess.y-1)){
    this.drawCandidateCircle(this.preChess.x+1,this.preChess.y-1);
    }
    if(!this.inArray(this.preChess.x+1,this.preChess.y+1)){
    this.drawCandidateCircle(this.preChess.x+1,this.preChess.y+1);
    }
   }else{
    this.drawCandidateCircle(5,9);
   }
   break;
   case "士":
   if(this.preChess.x==5&&this.preChess.y==2){
    if(!this.inArray(this.preChess.x-1,this.preChess.y-1)){
    this.drawCandidateCircle(this.preChess.x-1,this.preChess.y-1);
    }
    if(!this.inArray(this.preChess.x-1,this.preChess.y+1)){
    this.drawCandidateCircle(this.preChess.x-1,this.preChess.y+1);
    }
    if(!this.inArray(this.preChess.x+1,this.preChess.y-1)){
    this.drawCandidateCircle(this.preChess.x+1,this.preChess.y-1);
    }
    if(!this.inArray(this.preChess.x+1,this.preChess.y+1)){
    this.drawCandidateCircle(this.preChess.x+1,this.preChess.y+1);
    }
   }else{
    this.drawCandidateCircle(5,2);
   }
   break;
   case "帅":
   if(!this.inArray(this.preChess.x,this.preChess.y-1)&&this.preChess.y>8){
    this.drawCandidateCircle(this.preChess.x,this.preChess.y-1);
   }
   if(!this.inArray(this.preChess.x,this.preChess.y+1)&&this.preChess.y<10){
    this.drawCandidateCircle(this.preChess.x,this.preChess.y+1);
   }
   if(!this.inArray(this.preChess.x-1,this.preChess.y)&&this.preChess.x>4){
    this.drawCandidateCircle(this.preChess.x-1,this.preChess.y);
   }
   if(!this.inArray(this.preChess.x+1,this.preChess.y)&&this.preChess.x<6){
    this.drawCandidateCircle(this.preChess.x+1,this.preChess.y);
   }
   break;
   case "将":
   if(!this.inArray(this.preChess.x,this.preChess.y-1)&&this.preChess.y>1){
    this.drawCandidateCircle(this.preChess.x,this.preChess.y-1);
   }
   if(!this.inArray(this.preChess.x,this.preChess.y+1)&&this.preChess.y<3){
    this.drawCandidateCircle(this.preChess.x,this.preChess.y+1);
   }
   if(!this.inArray(this.preChess.x-1,this.preChess.y)&&this.preChess.x>4){
    this.drawCandidateCircle(this.preChess.x-1,this.preChess.y);
   }
   if(!this.inArray(this.preChess.x+1,this.preChess.y)&&this.preChess.x<6){
    this.drawCandidateCircle(this.preChess.x+1,this.preChess.y);
   }
   break;
   case "兵":
   if(this.preChess.y>5&&!this.inArray(this.preChess.x,this.preChess.y-1)){
    this.drawCandidateCircle(this.preChess.x,this.preChess.y-1);
   }else if(this.preChess.y<=5){
    if(!this.inArray(this.preChess.x,this.preChess.y-1)&&this.preChess.y>1){
    this.drawCandidateCircle(this.preChess.x,this.preChess.y-1);
    }
    if(!this.inArray(this.preChess.x-1,this.preChess.y)&&this.preChess.x>1){
    this.drawCandidateCircle(this.preChess.x-1,this.preChess.y);
    }
    if(!this.inArray(this.preChess.x+1,this.preChess.y)&&this.preChess.x<9){
    this.drawCandidateCircle(this.preChess.x+1,this.preChess.y);
    }
   }
   break;
   case "卒":
   if(this.preChess.y<=5&&!this.inArray(this.preChess.x,this.preChess.y+1)){
    this.drawCandidateCircle(this.preChess.x,this.preChess.y+1);
   }else if(this.preChess.y>5){
    if(!this.inArray(this.preChess.x,this.preChess.y+1)&&this.preChess.y<10){
    this.drawCandidateCircle(this.preChess.x,this.preChess.y+1);
    }
    if(!this.inArray(this.preChess.x-1,this.preChess.y)&&this.preChess.x>1){
    this.drawCandidateCircle(this.preChess.x-1,this.preChess.y);
    }
    if(!this.inArray(this.preChess.x+1,this.preChess.y)&&this.preChess.x<9){
    this.drawCandidateCircle(this.preChess.x+1,this.preChess.y);
    }
   }
   break;
   case "炮":
   var temp_y = this.preChess.y;
   while(!this.inArray(this.preChess.x,++temp_y)&&temp_y<=10){
    this.drawCandidateCircle(this.preChess.x,temp_y);
   }
   var temp_y = this.preChess.y;
   while(!this.inArray(this.preChess.x,--temp_y)&&temp_y>0){
    this.drawCandidateCircle(this.preChess.x,temp_y);
   }
   var temp_x = this.preChess.x;
   while(!this.inArray(++temp_x,this.preChess.y)&&temp_x<10){
    this.drawCandidateCircle(temp_x,this.preChess.y);
   }
   var temp_x = this.preChess.x;
   while(!this.inArray(--temp_x,this.preChess.y)&&temp_x>0){
    this.drawCandidateCircle(temp_x,this.preChess.y);
   }
   break;
  }
  }
  // 画候选形状
  obj.drawCandidateCircle = function(x,y){
  this.ctx.beginPath();
  this.ctx.fillStyle ="#eee";
  this.ctx.strokeStyle = "#000";
  this.ctx.lineWidth =2;
       this.ctx.arc(x*this.chunk, y*this.chunk, this.CandidateCircleR, 0, Math.PI * 2, true);

//  this.ctx.translate(x*this.chunk,y*this.chunk);
//  this.ctx.rotate(45*Math.PI/180);
//  this.ctx.translate(1*this.chunk,1*this.chunk);//设置画布上的(0,0)位置，也就是旋转的中心点
//   this.ctx.rotate(1*Math.PI/180);
//       this.ctx.fillRect(x*this.chunk-5,y*this.chunk-5,10,10);

       this.ctx.closePath();
       this.ctx.fill();
       this.ctx.stroke();
  }
  // 棋子移动规则
  obj.Move_rule = function(i,j){
  switch(this.preChess.text){
   case "?":
   return this.rule_Car(i,j);
   case "?":
   return this.rule_Horse(i,j); 
   case "相":
   return this.rule_Elephant_r(i,j);
   case "象":
   return this.rule_Elephant_b(i,j);
   case "仕":
   return this.rule_Scholar_r(i,j);
   case "士":
   return this.rule_Scholar_b(i,j);
   case "帅":
   return this.rule_Boss_r(i,j);
   case "将":
   return this.rule_Boss_b(i,j);
   case "兵":
   return this.rule_Soldier_r(i,j);
   case "卒":
   return this.rule_Soldier_b(i,j);
   case "炮":
   if(this.rule_Cannon(i,j)==0){
    return true;
   }
   return false;
  }
  }
  // 棋子吃子规则
  obj.Eat_rule = function(i,j){
  switch(this.preChess.text){
   case "?":
   return this.rule_Car(i,j);
   case "?":
   return this.rule_Horse(i,j); 
   case "相":
   return this.rule_Elephant_r(i,j);
   case "象":
   return this.rule_Elephant_b(i,j);
   case "仕":
   return this.rule_Scholar_r(i,j);
   case "士":
   return this.rule_Scholar_b(i,j);
   case "帅":
   return this.rule_Boss_r(i,j);
   case "将":
   return this.rule_Boss_b(i,j);
   case "兵":
   return this.rule_Soldier_r(i,j);
   case "卒":
   return this.rule_Soldier_b(i,j);
   case "炮":
   if(this.rule_Cannon(i,j)==1){
    return true;
   }
   return false;
  }
  }
  // ?的规则
  obj.rule_Car = function(i,j){
  if(this.preChess.x ==i||this.preChess.y==j){
   if(this.preChess.x ==i){
   if(this.preChess.y<j){
//    console.log("下");
    var hasObstacle = false;
    for(var p = this.preChess.y+1;p<j;p++){
    if(this.inArray(i,p)){
     hasObstacle = true;
     break;
    }
    }
    if(hasObstacle){
    return false;
    }
   }
   if(this.preChess.y>j){
//    console.log("上");
    var hasObstacle = false;
    for(var p = this.preChess.y-1;p>j;p--){
    if(this.inArray(i,p)){
     hasObstacle = true;
     break;
    }
    }
    if(hasObstacle){
    return false;
    }
   }
   }
   if(this.preChess.y ==j){
   if(this.preChess.x <i){
//    console.log("右");
    var hasObstacle = false;
    for(var p = this.preChess.x+1;p<i;p++){
    if(this.inArray(p,j)){
     hasObstacle = true;
     break;
    }
    }
    if(hasObstacle){
    return false;
    }
   }
   if(this.preChess.x >i){
//    console.log("左");
    var hasObstacle = false;
    for(var p = this.preChess.x-1;p>i;p--){
    if(this.inArray(p,j)){
     hasObstacle = true;
     break;
    }
    }
    if(hasObstacle){
    return false;
    }
   }
   }
   return true;
  }
  return false;
  }
  // ?的规则
  obj.rule_Horse = function(i,j){
  var hasObstacle = false;
  var that = this;
  if((Math.abs(this.preChess.x-i)==1&&Math.abs(this.preChess.y-j)==2)
  ||(Math.abs(this.preChess.x-i)==2&&Math.abs(this.preChess.y-j)==1)){
   if(this.preChess.x-i==2){ // 左
   $.each(that.cheer_arr_ALL,function(ii,ee){
    if(ee.x ==that.preChess.x-1&&ee.y==that.preChess.y){
    hasObstacle =true;
    return false;
    }
   });
   if(hasObstacle){
    return false;
   }
   }else if(i-that.preChess.x==2){ // 右
   $.each(that.cheer_arr_ALL,function(ii,ee){
    if(ee.x ==that.preChess.x+1&&ee.y==that.preChess.y){
    hasObstacle =true;
    return false;
    }
   });
   if(hasObstacle){
    return false;
   }
   }else if(that.preChess.y-j==2){ // 上
   $.each(that.cheer_arr_ALL,function(ii,ee){
    if(ee.x ==that.preChess.x&&ee.y==that.preChess.y-1){
    hasObstacle =true;
    return false;
    }
   });
   if(hasObstacle){
    return false;
   }
   }else if(j-that.preChess.y==2){ // 下
   $.each(that.cheer_arr_ALL,function(ii,ee){
    if(ee.x ==that.preChess.x&&ee.y==that.preChess.y+1){
    hasObstacle =true;
    return false;
    }
   });
   if(hasObstacle){
    return false;
   }
   }
   return true;
  }
  return false;
  }
  // 红相的规则
  obj.rule_Elephant_r = function(i,j){
  var hasObstacle = false;
  var that = this;
  if((Math.abs(that.preChess.x-i)==2&&Math.abs(that.preChess.y-j)==2)&&j>=6){
   var vgaX = (that.preChess.x+i)/2;
   var vgaY = (that.preChess.y+j)/2;
   console.log(vgaX);
   $.each(that.cheer_arr_ALL,function(ii,ee){
   if(ee.x ==vgaX&&ee.y==vgaY){
    hasObstacle =true;
    return false;
   }
   });
   if(hasObstacle){
   return false;
   }
   return true;
  }
  return false;
  }
  // 黑象的规则
  obj.rule_Elephant_b = function(i,j){
  var hasObstacle = false;
  var that = this;
  if((Math.abs(that.preChess.x-i)==2&&Math.abs(that.preChess.y-j)==2)&&j<6){
   var vgaX = (that.preChess.x+i)/2;
   var vgaY = (that.preChess.y+j)/2;
//   console.log(vgaX);
   $.each(that.cheer_arr_ALL,function(ii,ee){
   if(ee.x ==vgaX&&ee.y==vgaY){
    hasObstacle =true;
    return false;
   }
   });
   if(hasObstacle){
   return false;
   }
   return true;
  }
  return false;
  }
  // 红仕的规则
  obj.rule_Scholar_r = function(i,j){
  if(this.preChess.x==5&&this.preChess.y==9){
   if(Math.abs(this.preChess.x-i)==1&&Math.abs(this.preChess.y-j)==1){
   return true;
   }
  }else if(i==5&&j==9){
   return true;
  }
  return false;
  }
  // 黑仕的规则
  obj.rule_Scholar_b = function(i,j){
  if(this.preChess.x==5&&this.preChess.y==2){
   if(Math.abs(this.preChess.x-i)==1&&Math.abs(this.preChess.y-j)==1){
   return true;
   }
  }else if(i==5&&j==2){
   return true;
  }
  return false;
  }
  // 帅的规则
  obj.rule_Boss_r = function(i,j){
  if((Math.abs(this.preChess.x-i)==1&&this.preChess.y==j)
  ||(this.preChess.x==i&&Math.abs(this.preChess.y-j)==1)){
   if(i>=4&&i<=6&&j>=8&&j<=10){
   return true;
   }else{
   return false;
   }
  }
  return false;
  }
  // 将的规则
  obj.rule_Boss_b = function(i,j){
  if((Math.abs(this.preChess.x-i)==1&&this.preChess.y==j)
  ||(this.preChess.x==i&&Math.abs(this.preChess.y-j)==1)){
   if(i>=4&&i<=6&&j>=1&&j<=3){
   return true;
   }else{
   return false;
   }
  }
  return false;
  }
  // 兵的规则
  obj.rule_Soldier_r = function(i,j){
  if(this.preChess.y<=5){
   if((this.preChess.x ==i&&this.preChess.y-1==j)||(this.preChess.x-1 ==i&&this.preChess.y==j)||(this.preChess.x+1 ==i&&this.preChess.y==j)){
   return true;
   }
  }else{
   if(this.preChess.x ==i&&this.preChess.y-1==j){
   return true;
   }
  }
  return false;
  }
  // 卒的规则
  obj.rule_Soldier_b = function(i,j){
  if(this.preChess.y>5){
   if((this.preChess.x ==i&&this.preChess.y+1==j)||(this.preChess.x-1 ==i&&this.preChess.y==j)||(this.preChess.x+1 ==i&&this.preChess.y==j)){
   return true;
   }
  }else{
   if(this.preChess.x ==i&&this.preChess.y+1==j){
   return true;
   }
  }
  return false;
  }
  // 炮的规则
  obj.rule_Cannon = function(i,j){
  var that = this;
  if(this.preChess.x ==i||this.preChess.y==j){
   var t =0;
   if(this.preChess.x ==i){
   var temp = this.preChess.y;
   if(temp<j){
    while(++temp!=j){
    $.each(this.cheer_arr_ALL,function(ii,ee){
     if(ee.x ==that.preChess.x&&ee.y==temp){
     t++;
     return false;
     }
    });
    }
    return t;
   }else{
    while(--temp!=j){
    $.each(this.cheer_arr_ALL,function(ii,ee){
     if(ee.x ==that.preChess.x&&ee.y==temp){
     t++;
     return false;
     }
    });
    }
    return t;
   }
   }else{
   var temp = this.preChess.x;
   if(temp<i){
    while(++temp!=i){
    $.each(this.cheer_arr_ALL,function(ii,ee){
     if(ee.x ==temp&&ee.y==that.preChess.y){
     t++;
     return false;
     }
    });
    }
    return t;
   }else{
    while(--temp!=i){
    $.each(this.cheer_arr_ALL,function(ii,ee){
     if(ee.x ==temp&&ee.y==that.preChess.y){
     t++;
     return false;
     }
    });
    }
    return t;
   }
   }
  }
  return 2;
  }
  obj.inArray = function(x,y){
  var hasObstacle = false;
  $.each(this.cheer_arr_ALL,function(ii,ee){
   if(ee.x ==x&&ee.y==y){
   hasObstacle = true;
   return false;
   }
  });
  return hasObstacle;
  }
  obj.init();
//  obj.init({
//  chunk:50, // 格子大小
//  radius:23, // 棋子半径
//  ccr:3   // 候选小圆半径
//  });
 </script>
 </body>
</html>

以上就是本文的全部内容，希望本文的内容对大家的学习或者工作能带来一定的帮助，同时也希望多多支持三水点靠木！

canvas 实现中国象棋

- Author -

backsword

声明：登载此文出于传递更多信息之目的，并不意味着赞同其观点或证实其描述。

Javascript 相关文章推荐
Javascript String.replace的妙用
Sep 08 Javascript
JQuery将文本转化成JSON对象需要注意的问题
May 09 Javascript
javascript实现日历控件(年月日关闭按钮)
Dec 12 Javascript
Jquery each方法跳出循环,并获取返回值(实例讲解)
Dec 12 Javascript
js实现按钮加背景图片常用方法
Nov 01 Javascript
js选项卡的实现方法
Feb 09 Javascript
JS组件Bootstrap实现弹出框效果代码
Apr 26 Javascript
老生常谈JQuery data方法的使用
Sep 09 Javascript
JS查找字符串中出现最多的字符及个数统计
Feb 04 Javascript
Vue+Element使用富文本编辑器的示例代码
Aug 14 Javascript
JavaScript中运算符规则和隐式类型转换示例详解
Sep 06 Javascript
vue-cli 引入、配置axios的方法
May 08 Javascript
使用vue.js实现checkbox的全选和多个的删除功能
Feb 17 #Javascript
js实现横向拖拽导航条功能
Feb 17 #Javascript
js转换对象为xml
Feb 17 #Javascript
EsLint入门学习教程
Feb 17 #Javascript
使用bat打开多个cmd窗口执行gulp、node
Feb 17 #Javascript
AngularJS执行流程详解
Feb 17 #Javascript
详解Angularjs在控制器(controller.js)中使用过滤器($filter)格式化日期/时间实例
Feb 17 #Javascript
PR-D3L(1) 上海永华(1) 德劲1107(1) 德生1994(1) SRF-40W(1) ICF-F10(1) YH-R296(1) SRF-22W(1) ICF-SW100(1) 华普R-96(1)
You might like
PHP调用三种数据库的方法(2)
2006/10/09 PHP
解析百度搜索结果link?url=参数分析 (全)
2012/10/09 PHP
PHP memcache在微信公众平台的应用方法示例
2017/09/13 PHP
JavaScript 常见对象类创建代码与优缺点分析
2009/12/07 Javascript
向当前style sheet中插入一个新的style实现方法
2013/04/01 Javascript
无缝滚动js代码通俗易懂(自写)
2013/06/19 Javascript
jquery 定位input元素的几种方法小结
2013/07/28 Javascript
JavaScript中的style.cssText使用教程
2014/11/06 Javascript
jquery处理页面弹出层查询数据等待操作实例
2015/03/25 Javascript
基于jQuery和CSS3制作响应式水平时间轴附源码下载
2015/12/20 Javascript
js实现ctrl+v粘贴上传图片(兼容chrome、firefox、ie11)
2016/03/09 Javascript
AngularJS 所有版本下载地址
2016/09/14 Javascript
javascript回调函数的概念理解与用法分析
2017/05/27 Javascript
浅谈Angular4中常用管道
2017/09/27 Javascript
axios 封装上传文件的请求方法
2018/09/26 Javascript
微信小程序判断用户是否需要再次授权获取个人信息
2019/07/18 Javascript
jQuery实现html可联动的百分比进度条
2020/03/26 jQuery
python编程羊车门问题代码示例
2017/10/25 Python
利用python的socket发送http(s)请求方法示例
2018/05/07 Python
python3 selenium 切换窗口的几种方法小结
2018/05/21 Python
基于腾讯云服务器部署微信小程序后台服务（Python+Django）
2019/05/08 Python
Python自动抢红包教程详解
2019/06/11 Python
python中的列表与元组的使用
2019/08/08 Python
Django配置文件代码说明
2019/12/04 Python
TENSORFLOW变量作用域（VARIABLE SCOPE）
2020/01/10 Python
Python random模块制作简易的四位数验证码
2020/02/01 Python
深入了解Python enumerate和zip
2020/07/16 Python
Html5 audio标签样式的修改
2016/01/28 HTML / CSS
Canvas制作旋转的太极的示例
2018/03/09 HTML / CSS
解决html5中的video标签ios系统中无法播放使用的问题
2020/08/10 HTML / CSS
康帕斯酒店预订：Compass Hospitality（支持中文）
2018/08/23 全球购物
瑞典香水、须后水和美容产品购物网站：Parfym-Klick.se
2019/12/29 全球购物
自我鉴定思想方面
2013/10/07 职场文书
幼儿教师自我剖析材料
2014/09/29 职场文书
慰问信范文
2015/02/14 职场文书
方法汇总：Python 安装第三方库常用
2022/04/26 Python