canvas 实现中国象棋
发布时间 - 2026-01-10 23:07:42 点击率：次效果如下：
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:"車"}
var Horse_b1 = {x:2,y:1,text:"馬"}
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:"馬"}
var Car_b2 = {x:9,y:1,text:"車"}
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:"車"}
var Horse_r1 = {x:2,y:10,text:"馬"}
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:"馬"}
var Car_r2 = {x:9,y:10,text:"車"}
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/漢界
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("漢 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 "車":
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 "馬":
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 "車":
return this.rule_Car(i,j);
case "馬":
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 "車":
return this.rule_Car(i,j);
case "馬":
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;
}
}
// 車的规则
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;
}
// 馬的规则
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！
# canvas
# 中国象棋
# java绘制国际象棋与中国象棋棋盘
# Android实现中国象棋附源码下载
# Java棋类游戏实践之中国象棋
# 中国象棋js代码
# 仅演示
# 未能真下
# 诘屈聱牙之javascript中国象棋
# c# 绘制中国象棋棋盘与棋子
# 小圆
# 中心点
# 是否能
# 能吃
# init_chess
# init_back
# red
# steps
# ccr
# drawsharpS
# clearRect
# drawText
# drawX
# addEvent
# unbind
# drawColLine
# drawRowLine
# args
# document
# getElementById
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