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canvas版本中国象棋，象棋的棋子控制还是复杂一些

时间：2024-09-09 14:35:22浏览次数：12  
标签：中国象棋 fanweis 象棋 canvas number qizi var new Array

代码：

<!Doctype html>
<html lang="zh_cn">
    <head>
        <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
        <title>中国象棋</title>
        <meta name="Keywords" content="">
        <meta name="Description" content="">
        <meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=no" />

    </head>
<body>

<div style="display: flex; justify-content: left; align-items: center; height: 100%;">
<canvas id="myCanvas" width="600" height="600" style="border:1px;">
</canvas>
</div>

<script>
var margin = 10;
var pading = 30;
var maxLineNum = 9;
var maxFieldNum = 8;
var posResult = false; //是否已经获胜
var pieceList = getQiziList(); //棋子列表
var button_width = 120;
var button_height = 35;
var chongxin_x = 0;
var chongxin_y = 0;
var msg_x = 0;
var msg_y = 0;
var now_type = 1; //黑方先手,0红方，1黑方
var now_status = 0; //0选棋，1下棋
var choose_id = 0; //选中棋子的id
var resultMsg = new Array((now_type == 0 ? '红方' : '黑方')+"优先执棋...");
var errorMsg = ''; //错误消息

var myCanvas = document.getElementById("myCanvas");

var page_width = window.innerWidth;
var page_height = window.innerHeight;
//console.log("页面尺寸：宽："+page_width+"，高："+page_height);

var paint_width = page_width - 2 * margin - page_width / 6;
var paint_height = page_height - 2 * margin;
myCanvas.width = paint_width;
myCanvas.height = paint_height;
//console.log("画布尺寸：宽："+paint_width+"，高："+paint_height);

var left_width = paint_height - 2 * pading;
var left_height = paint_height - 2 * pading;
var right_width = paint_width - 2 * pading - left_width;
var right_height = paint_height - 2 * pading;

var perWidth = left_width / maxFieldNum;
var perHeight = left_height / maxLineNum;

//获取初始棋子列表
function getQiziList(){
    var res = new Array();
    var h = 0;
    
    var qizi = new Object();
    qizi.x = 0;
    qizi.y = 0;
    qizi.type = 0; //红方
    qizi.number = '車';
    qizi.fanweis = new Array();
    qizi.id = ++h;
    res.push(qizi);
    
    var qizi = new Object();
    qizi.x = 1;
    qizi.y = 0;
    qizi.type = 0; //红方
    qizi.number = '馬';
    qizi.fanweis = new Array();
    qizi.id = ++h;
    res.push(qizi);
    
    var qizi = new Object();
    qizi.x = 2;
    qizi.y = 0;
    qizi.type = 0; //红方
    qizi.number = '相';
    qizi.fanweis = new Array(new Array(2,0),new Array(6,0),new Array(0,2),new Array(4,2),new Array(8,2),new Array(2,4),new Array(6,4));
    qizi.id = ++h;
    res.push(qizi);
    
    var qizi = new Object();
    qizi.x = 3;
    qizi.y = 0;
    qizi.type = 0; //红方
    qizi.number = '仕';
    qizi.fanweis = new Array(new Array(3,0),new Array(5,0),new Array(4,1),new Array(3,2),new Array(5,2));
    qizi.id = ++h;
    res.push(qizi);
    
    var qizi = new Object();
    qizi.x = 4;
    qizi.y = 0;
    qizi.type = 0; //红方
    qizi.number = '帥';
    qizi.fanweis = new Array(new Array(3,0),new Array(4,0),new Array(5,0),new Array(3,1),new Array(4,1),new Array(5,1),new Array(3,2),new Array(4,2),new Array(5,2));
    qizi.id = ++h;
    res.push(qizi);
    
    var qizi = new Object();
    qizi.x = 5;
    qizi.y = 0;
    qizi.type = 0; //红方
    qizi.number = '仕';
    qizi.fanweis = new Array(new Array(3,0),new Array(5,0),new Array(4,1),new Array(3,2),new Array(5,2));
    qizi.id = ++h;
    res.push(qizi);
    
    var qizi = new Object();
    qizi.x = 6;
    qizi.y = 0;
    qizi.type = 0; //红方
    qizi.number = '相';
    qizi.fanweis = new Array(new Array(2,0),new Array(6,0),new Array(0,2),new Array(4,2),new Array(8,2),new Array(2,4),new Array(6,4));
    qizi.id = ++h;
    res.push(qizi);
    
    var qizi = new Object();
    qizi.x = 7;
    qizi.y = 0;
    qizi.type = 0; //红方
    qizi.number = '馬';
    qizi.fanweis = new Array();
    qizi.id = ++h;
    res.push(qizi);
    
    var qizi = new Object();
    qizi.x = 8;
    qizi.y = 0;
    qizi.type = 0; //红方
    qizi.number = '車';
    qizi.fanweis = new Array();
    qizi.id = ++h;
    res.push(qizi);
    
    var qizi = new Object();
    qizi.x = 1;
    qizi.y = 2;
    qizi.type = 0; //红方
    qizi.number = '砲';
    qizi.fanweis = new Array();
    qizi.id = ++h;
    res.push(qizi);
    
    var qizi = new Object();
    qizi.x = 7;
    qizi.y = 2;
    qizi.type = 0; //红方
    qizi.number = '砲';
    qizi.fanweis = new Array();
    qizi.id = ++h;
    res.push(qizi);
    
    var qizi = new Object();
    qizi.x = 0;
    qizi.y = 3;
    qizi.type = 0; //红方
    qizi.number = '兵';
    qizi.fanweis = new Array();
    qizi.id = ++h;
    res.push(qizi);
    
    var qizi = new Object();
    qizi.x = 2;
    qizi.y = 3;
    qizi.type = 0; //红方
    qizi.number = '兵';
    qizi.fanweis = new Array();
    qizi.id = ++h;
    res.push(qizi);
    
    var qizi = new Object();
    qizi.x = 4;
    qizi.y = 3;
    qizi.type = 0; //红方
    qizi.number = '兵';
    qizi.fanweis = new Array();
    qizi.id = ++h;
    res.push(qizi);
    
    var qizi = new Object();
    qizi.x = 6;
    qizi.y = 3;
    qizi.type = 0; //红方
    qizi.number = '兵';
    qizi.fanweis = new Array();
    qizi.id = ++h;
    res.push(qizi);
    
    var qizi = new Object();
    qizi.x = 8;
    qizi.y = 3;
    qizi.type = 0; //红方
    qizi.number = '兵';
    qizi.fanweis = new Array();
    qizi.id = ++h;
    res.push(qizi);
    
    var qizi = new Object();
    qizi.x = 0;
    qizi.y = 9;
    qizi.type = 1; //黑方
    qizi.number = '車';
    qizi.fanweis = new Array();
    qizi.id = ++h;
    res.push(qizi);
    
    var qizi = new Object();
    qizi.x = 1;
    qizi.y = 9;
    qizi.type = 1; //黑方
    qizi.number = '馬';
    qizi.fanweis = new Array();
    qizi.id = ++h;
    res.push(qizi);
    
    var qizi = new Object();
    qizi.x = 2;
    qizi.y = 9;
    qizi.type = 1; //黑方
    qizi.number = '象';
    qizi.fanweis = new Array(new Array(2,9),new Array(6,9),new Array(0,7),new Array(4,7),new Array(8,7),new Array(2,5),new Array(6,5));
    qizi.id = ++h;
    res.push(qizi);
    
    var qizi = new Object();
    qizi.x = 3;
    qizi.y = 9;
    qizi.type = 1; //黑方
    qizi.number = '士';
    qizi.fanweis = new Array(new Array(3,7),new Array(5,7),new Array(4,8),new Array(3,9),new Array(5,9));
    qizi.id = ++h;
    res.push(qizi);
    
    var qizi = new Object();
    qizi.x = 4;
    qizi.y = 9;
    qizi.type = 1; //黑方
    qizi.number = '将';
    qizi.fanweis = new Array(new Array(3,7),new Array(4,7),new Array(5,7),new Array(3,8),new Array(4,8),new Array(5,8),new Array(3,9),new Array(4,9),new Array(5,9));
    qizi.id = ++h;
    res.push(qizi);
    
    var qizi = new Object();
    qizi.x = 5;
    qizi.y = 9;
    qizi.type = 1; //黑方
    qizi.number = '士';
    qizi.fanweis = new Array(new Array(3,7),new Array(5,7),new Array(4,8),new Array(3,9),new Array(5,9));
    qizi.id = ++h;
    res.push(qizi);
    
    var qizi = new Object();
    qizi.x = 6;
    qizi.y = 9;
    qizi.type = 1; //黑方
    qizi.number = '象';
    qizi.fanweis = new Array(new Array(2,9),new Array(6,9),new Array(0,7),new Array(4,7),new Array(8,7),new Array(2,5),new Array(6,5));
    qizi.id = ++h;
    res.push(qizi);
    
    var qizi = new Object();
    qizi.x = 7;
    qizi.y = 9;
    qizi.type = 1; //黑方
    qizi.number = '馬';
    qizi.fanweis = new Array();
    qizi.id = ++h;
    res.push(qizi);
    
    var qizi = new Object();
    qizi.x = 8;
    qizi.y = 9;
    qizi.type = 1; //黑方
    qizi.number = '車';
    qizi.fanweis = new Array();
    qizi.id = ++h;
    res.push(qizi);
    
    var qizi = new Object();
    qizi.x = 1;
    qizi.y = 7;
    qizi.type = 1; //黑方
    qizi.number = '炮';
    qizi.fanweis = new Array();
    qizi.id = ++h;
    res.push(qizi);
    
    var qizi = new Object();
    qizi.x = 7;
    qizi.y = 7;
    qizi.type = 1; //黑方
    qizi.number = '炮';
    qizi.fanweis = new Array();
    qizi.id = ++h;
    res.push(qizi);
    
    var qizi = new Object();
    qizi.x = 0;
    qizi.y = 6;
    qizi.type = 1; //黑方
    qizi.number = '卒';
    qizi.fanweis = new Array();
    qizi.id = ++h;
    res.push(qizi);
    
    var qizi = new Object();
    qizi.x = 2;
    qizi.y = 6;
    qizi.type = 1; //黑方
    qizi.number = '卒';
    qizi.fanweis = new Array();
    qizi.id = ++h;
    res.push(qizi);
    
    var qizi = new Object();
    qizi.x = 4;
    qizi.y = 6;
    qizi.type = 1; //黑方
    qizi.number = '卒';
    qizi.fanweis = new Array();
    qizi.id = ++h;
    res.push(qizi);
    
    var qizi = new Object();
    qizi.x = 6;
    qizi.y = 6;
    qizi.type = 1; //黑方
    qizi.number = '卒';
    qizi.fanweis = new Array();
    qizi.id = ++h;
    res.push(qizi);
    
    var qizi = new Object();
    qizi.x = 8;
    qizi.y = 6;
    qizi.type = 1; //黑方
    qizi.number = '卒';
    qizi.fanweis = new Array();
    qizi.id = ++h;
    res.push(qizi);
    
    return res;
}

function checkxy(qizi, myx, myy){
    var typeCn = qizi.type == 0 ? '红方' : '黑方';
    var number = qizi.number;
    
    if(qizi.fanweis.length > 0){
        var checkres = false;
        for(var i = 0; i < qizi.fanweis.length; i++){
            if(qizi.fanweis[i][0] == myx && qizi.fanweis[i][1] == myy){
                checkres = true;
                break;
            }
        }
        if(checkres == false){
            errorMsg = typeCn+"["+number+"]不能跑出范围";
            console.log(qizi.fanweis);
            return false;
        }
    }
    
    if(qizi.number == '車'){
        var cantmp = true;
        if(qizi.x == myx && qizi.y != myy){
            var mintmp = qizi.y > myy ? myy : qizi.y;
            var maxtmp = qizi.y > myy ? qizi.y : myy;
            for(var i = mintmp+1; i < maxtmp; i++){
                var tmpqizi = getQiziInfoWithxy(myx, i);
                if(tmpqizi != false){
                    cantmp = false;
                    break;
                }
            }
        } else if(qizi.x != myx && qizi.y == myy){
            var mintmp = qizi.x > myx ? myx : qizi.x;
            var maxtmp = qizi.x > myx ? qizi.x : myx;
            for(var i = mintmp+1; i < maxtmp; i++){
                var tmpqizi = getQiziInfoWithxy(i, myy);
                if(tmpqizi != false){
                    cantmp = false;
                    break;
                }
            }
        } else{
            cantmp = false;
        }
        
        if(!cantmp){
            errorMsg = typeCn+"["+number+"]不能放到此位置";
            return false;
        }
    } else if(qizi.number == '砲' || qizi.number == '炮'){
        var cantmp = false;
        var counttmp = 0;
        var tmptype = qizi.type == 0 ? 1 : 0;
        var tmpduifangqizi = getQiziInfoWithxytype(myx, myy, tmptype);
        
        if(qizi.x == myx && qizi.y != myy){
            var mintmp = qizi.y > myy ? myy : qizi.y;
            var maxtmp = qizi.y > myy ? qizi.y : myy;
            for(var i = mintmp+1; i < maxtmp; i++){
                var tmpqizi = getQiziInfoWithxy(myx, i);
                if(tmpqizi != false){
                    counttmp++;
                }
            }
            if(tmpduifangqizi!=false && counttmp == 1){
                cantmp = true;
            } else if(tmpduifangqizi == false && counttmp == 0){
                cantmp = true;
            }
        } else if(qizi.x != myx && qizi.y == myy){
            var mintmp = qizi.x > myx ? myx : qizi.x;
            var maxtmp = qizi.x > myx ? qizi.x : myx;
            for(var i = mintmp+1; i < maxtmp; i++){
                var tmpqizi = getQiziInfoWithxy(i, myy);
                if(tmpqizi != false){
                    counttmp++;
                }
            }
            if(tmpduifangqizi!=false && counttmp == 1){
                cantmp = true;
            } else if(tmpduifangqizi == false && counttmp == 0){
                cantmp = true;
            }
        } else{
            cantmp = false;
        }
        
        if(!cantmp){
            errorMsg = typeCn+"["+number+"]不能放到此位置";
            return false;
        }
        
    } else if(qizi.number == '馬'){
        var cantmp = false;
        if(Math.abs(myx - qizi.x) == 1 && Math.abs(myy - qizi.y) == 2){
            var tmpx = qizi.x;
            var tmpy = Math.round((myy + qizi.y) / 2);
            cantmp = getQiziInfoWithxy(tmpx, tmpy) ? false : true;
        } else if(Math.abs(myx - qizi.x) == 2 && Math.abs(myy - qizi.y) == 1){
            var tmpx = Math.round((myx + qizi.x) / 2);
            var tmpy = qizi.y;
            cantmp = getQiziInfoWithxy(tmpx, tmpy) ? false : true;
        }
        
        if(!cantmp){
            errorMsg = typeCn+"["+number+"]不能放到此位置";
            return false;
        }
        
    } else if(qizi.number == '相' || qizi.number == '象'){
        var cantmp = false;
        if(qizi.x == qizi.fanweis[0][0] && qizi.y == qizi.fanweis[0][1]){ //左上1
            if(myx == qizi.fanweis[2][0] && myy == qizi.fanweis[2][1]){
                var tmpx = Math.round((qizi.fanweis[0][0]+qizi.fanweis[2][0])/2);
                var tmpy = Math.round((qizi.fanweis[0][1]+qizi.fanweis[2][1])/2);
                cantmp = getQiziInfoWithxy(tmpx, tmpy) ? false : true;
            } else if(myx == qizi.fanweis[3][0] && myy == qizi.fanweis[3][1]){
                var tmpx = Math.round((qizi.fanweis[0][0]+qizi.fanweis[3][0])/2);
                var tmpy = Math.round((qizi.fanweis[0][1]+qizi.fanweis[3][1])/2);
                cantmp = getQiziInfoWithxy(tmpx, tmpy) ? false : true;
            }
        } else if(qizi.x == qizi.fanweis[1][0] && qizi.y == qizi.fanweis[1][1]){//右上1
            if(myx == qizi.fanweis[3][0] && myy == qizi.fanweis[3][1]){
                var tmpx = Math.round((qizi.fanweis[1][0]+qizi.fanweis[3][0])/2);
                var tmpy = Math.round((qizi.fanweis[1][1]+qizi.fanweis[3][1])/2);
                cantmp = getQiziInfoWithxy(tmpx, tmpy) ? false : true;
            } else if(myx == qizi.fanweis[4][0] && myy == qizi.fanweis[4][1]){
                var tmpx = Math.round((qizi.fanweis[1][0]+qizi.fanweis[4][0])/2);
                var tmpy = Math.round((qizi.fanweis[1][1]+qizi.fanweis[4][1])/2);
                cantmp = getQiziInfoWithxy(tmpx, tmpy) ? false : true;
            }
        } else if(qizi.x == qizi.fanweis[5][0] && qizi.y == qizi.fanweis[5][1]){//左下1
            if(myx == qizi.fanweis[2][0] && myy == qizi.fanweis[2][1]){
                var tmpx = Math.round((qizi.fanweis[5][0]+qizi.fanweis[2][0])/2);
                var tmpy = Math.round((qizi.fanweis[5][1]+qizi.fanweis[2][1])/2);
                cantmp = getQiziInfoWithxy(tmpx, tmpy) ? false : true;
            } else if(myx == qizi.fanweis[3][0] && myy == qizi.fanweis[3][1]){
                var tmpx = Math.round((qizi.fanweis[5][0]+qizi.fanweis[3][0])/2);
                var tmpy = Math.round((qizi.fanweis[5][1]+qizi.fanweis[3][1])/2);
                cantmp = getQiziInfoWithxy(tmpx, tmpy) ? false : true;
            }
        } else if(qizi.x == qizi.fanweis[6][0] && qizi.y == qizi.fanweis[6][1]){//右下1
            if(myx == qizi.fanweis[3][0] && myy == qizi.fanweis[3][1]){
                var tmpx = Math.round((qizi.fanweis[6][0]+qizi.fanweis[3][0])/2);
                var tmpy = Math.round((qizi.fanweis[6][1]+qizi.fanweis[3][1])/2);
                cantmp = getQiziInfoWithxy(tmpx, tmpy) ? false : true;
            } else if(myx == qizi.fanweis[4][0] && myy == qizi.fanweis[4][1]){
                var tmpx = Math.round((qizi.fanweis[6][0]+qizi.fanweis[4][0])/2);
                var tmpy = Math.round((qizi.fanweis[6][1]+qizi.fanweis[4][1])/2);
                cantmp = getQiziInfoWithxy(tmpx, tmpy) ? false : true;
            }
        } else if(qizi.x == qizi.fanweis[2][0] && qizi.y == qizi.fanweis[2][1]){//左中1
            if(myx == qizi.fanweis[0][0] && myy == qizi.fanweis[0][1]){
                var tmpx = Math.round((qizi.fanweis[2][0]+qizi.fanweis[0][0])/2);
                var tmpy = Math.round((qizi.fanweis[2][1]+qizi.fanweis[0][1])/2);
                cantmp = getQiziInfoWithxy(tmpx, tmpy) ? false : true;
            } else if(myx == qizi.fanweis[5][0] && myy == qizi.fanweis[5][1]){
                var tmpx = Math.round((qizi.fanweis[2][0]+qizi.fanweis[5][0])/2);
                var tmpy = Math.round((qizi.fanweis[2][1]+qizi.fanweis[5][1])/2);
                cantmp = getQiziInfoWithxy(tmpx, tmpy) ? false : true;
            }
        } else if(qizi.x == qizi.fanweis[3][0] && qizi.y == qizi.fanweis[3][1]){//中2
            if(myx == qizi.fanweis[0][0] && myy == qizi.fanweis[0][1]){
                var tmpx = Math.round((qizi.fanweis[3][0]+qizi.fanweis[0][0])/2);
                var tmpy = Math.round((qizi.fanweis[3][1]+qizi.fanweis[0][1])/2);
                cantmp = getQiziInfoWithxy(tmpx, tmpy) ? false : true;
            } else if(myx == qizi.fanweis[1][0] && myy == qizi.fanweis[1][1]){
                var tmpx = Math.round((qizi.fanweis[3][0]+qizi.fanweis[1][0])/2);
                var tmpy = Math.round((qizi.fanweis[3][1]+qizi.fanweis[1][1])/2);
                cantmp = getQiziInfoWithxy(tmpx, tmpy) ? false : true;
            } else if(myx == qizi.fanweis[5][0] && myy == qizi.fanweis[5][1]){
                var tmpx = Math.round((qizi.fanweis[3][0]+qizi.fanweis[5][0])/2);
                var tmpy = Math.round((qizi.fanweis[3][1]+qizi.fanweis[5][1])/2);
                cantmp = getQiziInfoWithxy(tmpx, tmpy) ? false : true;
            } else if(myx == qizi.fanweis[6][0] && myy == qizi.fanweis[6][1]){
                var tmpx = Math.round((qizi.fanweis[3][0]+qizi.fanweis[6][0])/2);
                var tmpy = Math.round((qizi.fanweis[3][1]+qizi.fanweis[6][1])/2);
                cantmp = getQiziInfoWithxy(tmpx, tmpy) ? false : true;
            }
        } else if(qizi.x == qizi.fanweis[4][0] && qizi.y == qizi.fanweis[4][1]){//右中1
            if(myx == qizi.fanweis[1][0] && myy == qizi.fanweis[1][1]){
                var tmpx = Math.round((qizi.fanweis[4][0]+qizi.fanweis[1][0])/2);
                var tmpy = Math.round((qizi.fanweis[4][1]+qizi.fanweis[1][1])/2);
                cantmp = getQiziInfoWithxy(tmpx, tmpy) ? false : true;
            } else if(myx == qizi.fanweis[6][0] && myy == qizi.fanweis[6][1]){
                var tmpx = Math.round((qizi.fanweis[4][0]+qizi.fanweis[6][0])/2);
                var tmpy = Math.round((qizi.fanweis[4][1]+qizi.fanweis[6][1])/2);
                cantmp = getQiziInfoWithxy(tmpx, tmpy) ? false : true;
            }
        }
        
        if(!cantmp){
            errorMsg = typeCn+"["+number+"]不能放到此位置";
            return false;
        }
        
    } else if(qizi.number == '士' || qizi.number == '仕'){
        var centerindex = 2;
        var centerpoint = qizi.fanweis[centerindex];
        var cantmp = false;
        if(qizi.x == centerpoint[0] && qizi.y == centerpoint[1]){
            for(var i = 0; i < qizi.fanweis.length; i++){
                if(i == centerindex){
                    continue;
                }
                if(qizi.fanweis[i][0] == myx && qizi.fanweis[i][1] == myy){
                    cantmp = true;
                }
            }
        } else{
            if(centerpoint[0] == myx && centerpoint[1] == myy){
                cantmp = true;
            }
        }
        
        if(!cantmp){
            errorMsg = typeCn+"["+number+"]不能放到此位置";
            return false;
        }
        
    } else if(qizi.number == '将' || qizi.number == '帥'){
        if(Math.abs(myy-qizi.y)>1){ //前后一次只能走一步
            errorMsg = typeCn+"["+number+"]前后一次只能走一步";
            return false;
        }
        if(Math.abs(myx-qizi.x)>1){ //左右一次只能走一步
            errorMsg = typeCn+"["+number+"]左右一次只能走一步";
            return false;
        }
        if(Math.abs(myx-qizi.x)!=0 && Math.abs(myy-qizi.y)!=0){ //只能直走
            errorMsg = typeCn+"["+number+"]只能直走";
            return false;
        }
        
    } else if(qizi.number == '卒' || qizi.number == '兵'){
        if(qizi.type == 0){ //红方
            if(myy<qizi.y){ //不能倒着走
                errorMsg = typeCn+"["+number+"]不能倒着走";
                return false;
            }
            if(Math.abs(myy-qizi.y)>1){ //一次只能走一步
                errorMsg = typeCn+"["+number+"]一次只能走一步";
                return false;
            }
            if(Math.abs(myx-qizi.x)!=0 && Math.abs(myy-qizi.y)!=0){ //只能直走
                errorMsg = typeCn+"["+number+"]只能直走";
                return false;
            }
            
            if(qizi.y > 4){//已过河
                if(Math.abs(myx-qizi.x)>1){ //左右一次只能走一步
                    errorMsg = typeCn+"["+number+"]左右一次只能走一步";
                    return false;
                }
            }
            else{//未过河
                if(qizi.x != myx){ //不能左右走
                    errorMsg = typeCn+"["+number+"]不能左右走";
                    return false;
                }
            }
        } else{ //黑方
            if(myy>qizi.y){ //不能倒着走
                errorMsg = typeCn+"["+number+"]不能倒着走";
                return false;
            }
            if(Math.abs(qizi.y-myy)>1){ //一次只能走一步
                errorMsg = typeCn+"["+number+"]一次只能走一步";
                return false;
            }
            if(Math.abs(myx-qizi.x)!=0 && Math.abs(qizi.y-myy)!=0){ //只能直走
                errorMsg = typeCn+"["+number+"]只能直走";
                return false;
            }
            if(qizi.y < 5){//已过河
                if(Math.abs(myx-qizi.x)>1){ //左右一次只能走一步
                    errorMsg = typeCn+"["+number+"]左右一次只能走一步";
                    return false;
                }
            }
            else{//未过河
                if(qizi.x != myx){ //不能左右走
                    errorMsg = typeCn+"["+number+"]不能左右走";
                    return false;
                }
            }
        }
    } else {
        errorMsg = '我擦，你这棋是从哪弄的';
        return false;
    }
    
    var tmpqizi = getQiziInfoWithxytype(myx, myy, qizi.type);
    if(tmpqizi!= false){
        errorMsg = typeCn+"["+number+"]不能放在己方棋子上";
        return false;
    }
    
    return true;
}

//处理鼠标事件
function doMouseDown(e){
    //console.log("鼠标点击了，坐标："+e.clientX+", "+e.clientY);
    
    var rect = myCanvas.getBoundingClientRect();
    //console.log("画布坐标："+rect.left+" ,"+rect.top);
    //console.log("画布尺寸："+rect.width+" ,"+rect.height);
    
    //判断是否点击重新开始按钮
    if(e.clientX > chongxin_x && e.clientX < chongxin_x+button_width && e.clientY > chongxin_y && e.clientY < chongxin_y+button_height){
        console.log('重新开始按钮被点击了');
        posResult = false; //是否已经获胜
        pieceList = getQiziList(); //棋子列表
        now_type = 1; //黑方先手,0红方，1黑方
        now_status = 0; //0选棋，1下棋
        choose_id = 0;
        resultMsg = new Array((now_type == 0 ? '红方' : '黑方')+"优先执棋...");
        draw();
    }
    
    if(posResult == true){
        return ;
    }
    
    //下棋区域
    if(e.clientX < left_width+pading+margin && e.clientY < left_height+pading+margin){
        var myx = 0;
        var myy = 0;
        for(var i = 0; i <= maxFieldNum+1; i++){
            var minx = pading+perWidth*i;
            var maxx = pading+perWidth*(i+1);
            if(e.clientX >= minx && e.clientX <= maxx){
                if(Math.abs(e.clientX-minx) < Math.abs(maxx-e.clientX)){
                    myx = i;
                } else{
                    myx = i+1;
                }
            }
        }
        
        for(var i = 0; i <= maxLineNum+1; i++){
            var miny = pading+perHeight*i;
            var maxy = pading+perHeight*(i+1);
            if(e.clientY >= miny && e.clientY <= maxy){
                if(Math.abs(e.clientY-miny) < Math.abs(maxy-e.clientY)){
                    myy = i;
                } else{
                    myy = i+1;
                }
            }
        }
        
        console.log("鼠标点击的下棋区域，坐标:"+myx+","+myy);
        //now_type 黑方先手,0红方，1黑方
        if(now_status == 0){//选棋
            //console.log("选棋");
            for(var i = 0; i < pieceList.length; i++){
                if(pieceList[i].x == myx && pieceList[i].y == myy && pieceList[i].type == now_type){
                    var typeCn = now_type == 0 ? '红方' : '黑方';
                    resultMsg.push(typeCn+"选中["+pieceList[i].number+"]");
                    now_status = 1; //1下棋
                    choose_id = pieceList[i].id;
                    errorMsg = '';
                    draw();
                }
            }
        } else if(now_status == 1){//下棋
            var choose_qiziinfo = getQiziInfoWithid(choose_id);
            if(choose_qiziinfo == false){
                errorMsg = '我擦，请先选棋';
                return false;
            }
            
            if(choose_qiziinfo.x == myx && choose_qiziinfo.y == myy){
                var typeCn = now_type == 0 ? '红方' : '黑方';
                resultMsg.push(typeCn+"撤销选中["+pieceList[i].number+"]");
                now_status = 0; //0选棋
                choose_id = 0;
                draw();
                return true;
            }
            
            //验证是否可以走棋，位置是否正确判断
            if(checkxy(choose_qiziinfo, myx, myy) == false){
                var typeCn = now_type == 0 ? '红方' : '黑方';
                now_status = 0; //0选棋
                choose_id = 0;
                draw();
                return true;
            }
            
            //console.log("下棋");
            for(var i = 0; i < pieceList.length; i++){
                var typeCn = now_type == 0 ? '红方' : '黑方';
                if(pieceList[i].id == choose_id){
                    pieceList[i].x = myx;
                    pieceList[i].y = myy;
                    resultMsg.push(typeCn+"将["+pieceList[i].number+"]移动到坐标:"+myx+","+myy);
                    choose_id = 0;
                    now_status = 0; //0选棋
                    
                    //换方
                    if(now_type == 0){
                        now_type = 1;
                    } else{
                        now_type = 0;
                    }
                }
            }
            
            //判断是走棋还是吃棋，目标位置是否存在棋子
            //console.log(choose_qiziinfo);
            var tmptype = choose_qiziinfo.type == 0 ? 1 : 0;
            var qiziExists = getQiziInfoWithxytype(myx, myy, tmptype);
            //console.log(qiziExists);
            
            //处理吃棋,过滤掉被吃棋子
            if(qiziExists != false){
                var typeCn = qiziExists.type == 0 ? '红方' : '黑方';
                resultMsg.push(typeCn+"["+qiziExists.number+"]被吃");
                pieceList = pieceList.filter(function(item) {
                    return item.id != qiziExists.id;
                });
            }
            
            //判断是否将军
            var jiangjun = isJiangjun(choose_qiziinfo.type);
            if(jiangjun){
                var typeCn = choose_qiziinfo.type == 0 ? '红方' : '黑方';
                resultMsg.push(typeCn+"["+choose_qiziinfo.number+"]将军");
            }
            
            //判断是否已获胜
            posResult = getPosResult(choose_qiziinfo.type);
            if(posResult){
                var typeCn = choose_qiziinfo.type == 0 ? '红方' : '黑方';
                resultMsg.push(typeCn+"获胜");
            }
            
            
            //重绘棋盘和棋子
            draw();
        }
    }
}

//判断是否已获胜
function getPosResult(type){
    var tmptype = type == 0 ? 1 : 0;
    var shuai = getQiziInfoWithnumbers(new Array('将', '帥'), tmptype);
    //console.log(shuai);
    if(shuai == false){
        return true;
    }
    
    return false;
}

//判断是否将军
function isJiangjun(type){
    var tmptype = type == 0 ? 1 : 0;
    var shuai = getQiziInfoWithnumbers(new Array('将', '帥'), tmptype);
    //console.log(shuai);
    
    for(var i = 0; i < pieceList.length; i++){
        if(pieceList[i].type != type){
            continue;
        }
        
        var qizi = pieceList[i];
        
        if(qizi.number == '車'){
            if(shuai.x == qizi.x){
                var mintmp = qizi.y > shuai.y ? shuai.y : qizi.y;
                var maxtmp = qizi.y > shuai.y ? qizi.y : shuai.y;
                for(var j = mintmp+1; j < maxtmp; j++){
                    var tmpqizi = getQiziInfoWithxy(qizi.x, j);
                    if(tmpqizi != false){
                        return false;
                    }
                }
                return true;
            } else if(shuai.y == qizi.y){
                var mintmp = qizi.x > shuai.x ? shuai.x : qizi.x;
                var maxtmp = qizi.x > shuai.x ? qizi.x : shuai.x;
                for(var j = mintmp+1; j < maxtmp; j++){
                    var tmpqizi = getQiziInfoWithxy(j, qizi.y);
                    if(tmpqizi != false){
                        return false;
                    }
                }
                return true;
            }
        } else if(qizi.number == '砲' || qizi.number == '炮'){
            //console.log(qizi);
            if(shuai.x == qizi.x){
                var jiangenum = 0;
                var mintmp = qizi.y > shuai.y ? shuai.y : qizi.y;
                var maxtmp = qizi.y > shuai.y ? qizi.y : shuai.y;
                for(var j = mintmp+1; j < maxtmp; j++){
                    var tmpqizi = getQiziInfoWithxy(qizi.x, j);
                    if(tmpqizi != false){
                        jiangenum++;
                    }
                }
                return jiangenum == 1 ? true : false;
            } else if(shuai.y == qizi.y){
                var jiangenum = 0;
                var mintmp = qizi.x > shuai.x ? shuai.x : qizi.x;
                var maxtmp = qizi.x > shuai.x ? qizi.x : shuai.x;
                for(var j = mintmp+1; j < maxtmp; j++){
                    var tmpqizi = getQiziInfoWithxy(j, qizi.y);
                    if(tmpqizi != false){
                        jiangenum++;
                    }
                }
                console.log(jiangenum);
                return jiangenum == 1 ? true : false;
            }
        } else if(qizi.number == '馬'){
            var cantmp = false;
            if(Math.abs(shuai.x - qizi.x) == 1 && Math.abs(shuai.y - qizi.y) == 2){
                var tmpx = qizi.x;
                var tmpy = Math.round((shuai.y + qizi.y) / 2);
                cantmp = getQiziInfoWithxy(tmpx, tmpy) ? false : true;
            } else if(Math.abs(shuai.x - qizi.x) == 2 && Math.abs(shuai.y - qizi.y) == 1){
                var tmpx = Math.round((shuai.x + qizi.x) / 2);
                var tmpy = qizi.y;
                cantmp = getQiziInfoWithxy(tmpx, tmpy) ? false : true;
            }
            
            return cantmp;
        } else if(qizi.number == '相' || qizi.number == '象'){
            //
        } else if(qizi.number == '士' || qizi.number == '仕'){
            //
        } else if(qizi.number == '将' || qizi.number == '帥'){
            //
        } else if(qizi.number == '卒' || qizi.number == '兵'){
            if(shuai.x == qizi.x){
                if(shuai.type == 0 && qizi.y - 1 == shuai.y){
                    return true;
                } else if(shuai.type == 1 && qizi.y + 1 == shuai.y){
                    return true;
                }
                return false;
            } else if(shuai.y == qizi.y){
                if(qizi.x - 1 == shuai.x){
                    return true;
                } else if(qizi.x + 1 == shuai.x){
                    return true;
                }
                return false;
            }
        }
    }
    
    return false;
}

function draw(){
    //清理画布
    var ctx = myCanvas.getContext("2d");
    ctx.beginPath();
    ctx.clearRect(0, 0, paint_width, paint_height);

    //画布背景
    var ctx = myCanvas.getContext("2d");
    ctx.beginPath();
    ctx.fillStyle = "rgb(210,180,140)";
    ctx.fillRect(0,0,paint_width,paint_height);
    //console.log("画布背景尺寸：宽："+paint_width+"，高："+paint_height);

    //左侧背景
    var ctx = myCanvas.getContext("2d");
    ctx.beginPath();
    ctx.fillStyle = "rgb(255,250,240)";
    ctx.fillRect(pading,pading,left_width,left_height);
    //console.log("左侧背景尺寸：宽："+left_width+"，高："+left_height);

    //右侧背景
    var ctx = myCanvas.getContext("2d");
    ctx.beginPath();
    ctx.fillStyle = "rgb(250,250,210)";
    ctx.fillRect(left_width+pading,pading,right_width,right_height);
    //console.log("右侧背景尺寸：宽："+right_width+"，高："+right_height);

    //横线
    for(var i = 0; i <= maxLineNum; i++){
        var ctx = myCanvas.getContext("2d");
        ctx.beginPath();
        ctx.moveTo(pading, pading+perHeight*i);
        ctx.lineTo(pading+left_width, pading+perHeight*i);
        ctx.strokeStyle = 'black';
        ctx.lineWidth = 1;
        ctx.stroke();
    }

    //竖线
    for(var i = 0; i <= maxFieldNum; i++){
        var ctx = myCanvas.getContext("2d");
        ctx.beginPath();
        if(i == 0 || i == maxFieldNum){
            ctx.moveTo(pading+perWidth*i, pading);
            ctx.lineTo(pading+perWidth*i, pading+left_height);
        } else{
            ctx.moveTo(pading+perWidth*i, pading);
            ctx.lineTo(pading+perWidth*i, pading+perHeight*4);
            
            ctx.moveTo(pading+perWidth*i, pading+perHeight*5);
            ctx.lineTo(pading+perWidth*i, pading+perHeight*9);
        }
        ctx.strokeStyle = 'black';
        ctx.lineWidth = 1;
        ctx.stroke();
    }
    
    //士路红方
    var ctx = myCanvas.getContext("2d");
    ctx.beginPath();
    ctx.moveTo(pading+perWidth*3, pading+perHeight*0);
    ctx.lineTo(pading+perWidth*5, pading+perHeight*2);
    ctx.strokeStyle = 'gray';
    ctx.lineWidth = 1;
    ctx.stroke();
    
    var ctx = myCanvas.getContext("2d");
    ctx.beginPath();
    ctx.moveTo(pading+perWidth*5, pading+perHeight*0);
    ctx.lineTo(pading+perWidth*3, pading+perHeight*2);
    ctx.strokeStyle = 'gray';
    ctx.lineWidth = 1;
    ctx.stroke();
    
    //士路黑方
    var ctx = myCanvas.getContext("2d");
    ctx.beginPath();
    ctx.moveTo(pading+perWidth*3, pading+perHeight*7);
    ctx.lineTo(pading+perWidth*5, pading+perHeight*9);
    ctx.strokeStyle = 'gray';
    ctx.lineWidth = 1;
    ctx.stroke();
    
    var ctx = myCanvas.getContext("2d");
    ctx.beginPath();
    ctx.moveTo(pading+perWidth*5, pading+perHeight*7);
    ctx.lineTo(pading+perWidth*3, pading+perHeight*9);
    ctx.strokeStyle = 'gray';
    ctx.lineWidth = 1;
    ctx.stroke();
    
    //相路红方
    var ctx = myCanvas.getContext("2d");
    ctx.setLineDash([5, 5]);
    ctx.lineDashOffset = 0;
    ctx.beginPath();
    ctx.moveTo(pading+perWidth*2, pading+perHeight*0);
    ctx.lineTo(pading+perWidth*6, pading+perHeight*4);
    ctx.strokeStyle = 'gray';
    ctx.lineWidth = 1;
    ctx.stroke();
    
    var ctx = myCanvas.getContext("2d");
    ctx.setLineDash([5, 5]);
    ctx.lineDashOffset = 0;
    ctx.beginPath();
    ctx.moveTo(pading+perWidth*6, pading+perHeight*0);
    ctx.lineTo(pading+perWidth*2, pading+perHeight*4);
    ctx.strokeStyle = 'gray';
    ctx.lineWidth = 1;
    ctx.stroke();
    
    var ctx = myCanvas.getContext("2d");
    ctx.setLineDash([5, 5]);
    ctx.lineDashOffset = 0;
    ctx.beginPath();
    ctx.moveTo(pading+perWidth*0, pading+perHeight*2);
    ctx.lineTo(pading+perWidth*2, pading+perHeight*0);
    ctx.strokeStyle = 'gray';
    ctx.lineWidth = 1;
    ctx.stroke();
    
    var ctx = myCanvas.getContext("2d");
    ctx.setLineDash([5, 5]);
    ctx.lineDashOffset = 0;
    ctx.beginPath();
    ctx.moveTo(pading+perWidth*0, pading+perHeight*2);
    ctx.lineTo(pading+perWidth*2, pading+perHeight*4);
    ctx.strokeStyle = 'gray';
    ctx.lineWidth = 1;
    ctx.stroke();
    
    var ctx = myCanvas.getContext("2d");
    ctx.setLineDash([5, 5]);
    ctx.lineDashOffset = 0;
    ctx.beginPath();
    ctx.moveTo(pading+perWidth*6, pading+perHeight*0);
    ctx.lineTo(pading+perWidth*8, pading+perHeight*2);
    ctx.strokeStyle = 'gray';
    ctx.lineWidth = 1;
    ctx.stroke();
    
    var ctx = myCanvas.getContext("2d");
    ctx.setLineDash([5, 5]);
    ctx.lineDashOffset = 0;
    ctx.beginPath();
    ctx.moveTo(pading+perWidth*6, pading+perHeight*4);
    ctx.lineTo(pading+perWidth*8, pading+perHeight*2);
    ctx.strokeStyle = 'gray';
    ctx.lineWidth = 1;
    ctx.stroke();
    
    //相路黑方
    var ctx = myCanvas.getContext("2d");
    ctx.setLineDash([5, 5]);
    ctx.lineDashOffset = 0;
    ctx.beginPath();
    ctx.moveTo(pading+perWidth*2, pading+perHeight*5);
    ctx.lineTo(pading+perWidth*6, pading+perHeight*9);
    ctx.strokeStyle = 'gray';
    ctx.lineWidth = 1;
    ctx.stroke();
    
    var ctx = myCanvas.getContext("2d");
    ctx.setLineDash([5, 5]);
    ctx.lineDashOffset = 0;
    ctx.beginPath();
    ctx.moveTo(pading+perWidth*6, pading+perHeight*5);
    ctx.lineTo(pading+perWidth*2, pading+perHeight*9);
    ctx.strokeStyle = 'gray';
    ctx.lineWidth = 1;
    ctx.stroke();
    
    var ctx = myCanvas.getContext("2d");
    ctx.setLineDash([5, 5]);
    ctx.lineDashOffset = 0;
    ctx.beginPath();
    ctx.moveTo(pading+perWidth*0, pading+perHeight*7);
    ctx.lineTo(pading+perWidth*2, pading+perHeight*5);
    ctx.strokeStyle = 'gray';
    ctx.lineWidth = 1;
    ctx.stroke();
    
    var ctx = myCanvas.getContext("2d");
    ctx.setLineDash([5, 5]);
    ctx.lineDashOffset = 0;
    ctx.beginPath();
    ctx.moveTo(pading+perWidth*0, pading+perHeight*7);
    ctx.lineTo(pading+perWidth*2, pading+perHeight*9);
    ctx.strokeStyle = 'gray';
    ctx.lineWidth = 1;
    ctx.stroke();
    
    var ctx = myCanvas.getContext("2d");
    ctx.setLineDash([5, 5]);
    ctx.lineDashOffset = 0;
    ctx.beginPath();
    ctx.moveTo(pading+perWidth*6, pading+perHeight*5);
    ctx.lineTo(pading+perWidth*8, pading+perHeight*7);
    ctx.strokeStyle = 'gray';
    ctx.lineWidth = 1;
    ctx.stroke();
    
    var ctx = myCanvas.getContext("2d");
    ctx.setLineDash([5, 5]);
    ctx.lineDashOffset = 0;
    ctx.beginPath();
    ctx.moveTo(pading+perWidth*6, pading+perHeight*9);
    ctx.lineTo(pading+perWidth*8, pading+perHeight*7);
    ctx.strokeStyle = 'gray';
    ctx.lineWidth = 1;
    ctx.stroke();
    
    
    //楚河
    var ctx = myCanvas.getContext("2d");
    ctx.beginPath();
    ctx.fillStyle="rgb(220,220,220)";
    ctx.font="60px lisu";
    ctx.fillText("楚河", perWidth+pading-perWidth/2.1, pading+perHeight*4+perHeight/1.5);
    
    //漢界
    var ctx = myCanvas.getContext("2d");
    ctx.beginPath();
    ctx.fillStyle="rgb(220,220,220)";
    ctx.font="60px lisu";
    ctx.fillText("漢界", perWidth*7+pading-perWidth/2.1, pading+perHeight*4+perHeight/1.5);
    
    //画上已经下了的棋子
    //console.log(pieceList);
    for(var i = 0; i < pieceList.length; i++){
        var x = pieceList[i].x;
        var y = pieceList[i].y;
        var type = pieceList[i].type;
        var number = pieceList[i].number;
        var choose = pieceList[i].id == choose_id ? 1 : 0;
        //console.log(choose);
        if(type == 0){
            var color = choose == 0 ? 'rgb(139,105,20)' : 'rgb(238,207,161)';
            var border_color = choose == 0 ? 'red' : 'orange';
            var font_color = 'red';
        } else{
            var color = choose == 0 ? 'rgb(139,105,20)' : 'rgb(238,207,161)';
            var border_color = choose == 0 ? 'black' : 'gray';
            var font_color = 'black';
        }
        
        var ctx = myCanvas.getContext("2d");
        if(choose == 0){
            ctx.setLineDash([0, 0]);
            ctx.lineDashOffset = 0;
        } else{
            ctx.setLineDash([1, 1]);
            ctx.lineDashOffset = 0;
        }
        ctx.beginPath();
        ctx.arc(perWidth*x+pading,pading+y*perHeight,perWidth/3.7,0,2*Math.PI);
        ctx.fillStyle = color;
        ctx.lineWidth=choose == 0 ? '1' : '2';
        ctx.strokeStyle = border_color;
        ctx.fill();
        ctx.stroke();
        
        ctx.fillStyle=font_color;
        ctx.font="35px lisu";
        ctx.fillText(number, perWidth*x+pading-perWidth/6.2, pading+y*perHeight+perHeight/6.2);
    }
    
    //重新开始按钮
    chongxin_x = left_width+pading+right_width/3;
    chongxin_y = pading+right_height/30;
    var ctx = myCanvas.getContext("2d");
    ctx.beginPath();
    ctx.fillStyle = "rgb(205,155,29)";
    ctx.fillRect(chongxin_x,chongxin_y,button_width,button_height);
    
    ctx.fillStyle='white';
    ctx.font="14px Arial";
    ctx.fillText('重新开始', chongxin_x+button_width/3.5,chongxin_y+button_height/1.6);
    
    if(errorMsg != ''){
        msg_x = left_width+pading+button_width/1.3;
        msg_y = pading+right_height/8;
        
        var ctx = myCanvas.getContext("2d");
        ctx.beginPath();
        ctx.fillStyle='IndianRed';
        ctx.font="14px Arial";
        ctx.fillText(errorMsg, msg_x,msg_y);
    }
    
    //显示获胜信息
    if(resultMsg.length > 0){
        var maxmsgnum = 30;
        var startIndex = resultMsg.length-maxmsgnum>0 ? resultMsg.length-maxmsgnum : 0;
        var endIndex = resultMsg.length;
        //console.log(startIndex);
        //console.log(endIndex);
        var resultMsg1 = resultMsg.slice(startIndex, endIndex);
        for(var i = 0; i < resultMsg1.length; i++){
            msg_x = left_width+pading+button_width/1.3;
            msg_y = pading+right_height/6+18*(i+1);
            var ctx = myCanvas.getContext("2d");
            ctx.beginPath();
            ctx.fillStyle='SeaGreen';
            ctx.font="14px Arial";
            ctx.fillText("["+(startIndex+1+i)+"]"+resultMsg1[i], msg_x,msg_y);
        }
    }
    
    myCanvas.addEventListener('mousedown', doMouseDown,true);
    myCanvas.focus();
    //window.addEventListener('mousedown', doMouseDown, true);
}

//获取单个棋子
function getQiziInfoWithid(id){
    for(var i = 0; i < pieceList.length; i++){
        if(pieceList[i].id == id){
            return pieceList[i];
        }
    }
    
    return false;
}

//获取单个棋子
function getQiziInfoWithxy(x, y){
    for(var i = 0; i < pieceList.length; i++){
        if(pieceList[i].x == x && pieceList[i].y == y){
            return pieceList[i];
        }
    }
    
    return false;
}

//获取单个棋子
function getQiziInfoWithxytype(x, y, type){
    for(var i = 0; i < pieceList.length; i++){
        if(pieceList[i].x == x && pieceList[i].y == y && pieceList[i].type == type){
            return pieceList[i];
        }
    }
    
    return false;
}

//获取单个棋子
function getQiziInfoWithnumbers(numbers, type){
    for(var i = 0; i < pieceList.length; i++){
        if(type != pieceList[i].type){
            continue;
        }
        if(numbers.includes(pieceList[i].number)){
            return pieceList[i];
        }
    }
    
    return false;
}

function getUnixTime(){
    return Math.floor(Date.now() / 1000);
}

function getRandomInt(min, max) {
    min = Math.ceil(min);
    max = Math.floor(max);
    return Math.floor(Math.random() * (max - min + 1)) + min;
}

draw();
</script>

</body>
</html>

 

效果：

 

标签：中国象棋,fanweis,象棋,canvas,number,qizi,var,new,Array
From： https://www.cnblogs.com/xuxiaobo/p/18404519

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