今天无聊,自己写了一个解二维迷宫的js类,请指教。
/* 功能:解二维迷宫
* 制作:Vilien
* 日期:2013.10.25
*
* @usage new Maze(maze, x, y, epx, epy)
*
* @param maze
* > 二维迷宫,必须,类型为二维数组
* > 0表示可通过,1表示不可通过
*
* @param x
* > 迷宫起点横坐标,可选,缺省为0,从左顶点计算起
*
* @param y
* > 迷宫起点纵坐标,可选,缺省为0,从左顶点计算起
*
* @param epx
* > 迷宫终点横坐标,可选,缺省为最大横坐标,从左顶点计算起
*
* @param epy
* > 迷宫终点纵坐标,可选,缺省为最大纵坐标,从左顶点计算起
*
* @eg
* > var maze = [
* > [ 0, 0, 0, 0, 1, 0, 0, 0 ],
* > [ 0, 1, 1, 1, 1, 0, 1, 0 ],
* > [ 0, 0, 0, 0, 1, 0, 1, 0 ],
* > [ 0, 1, 0, 0, 0, 0, 1, 0 ],
* > [ 0, 1, 0, 1, 1, 0, 1, 0 ],
* > [ 0, 1, 0, 0, 1, 0, 1, 0 ],
* > [ 0, 1, 0, 0, 1, 0, 0, 0 ],
* > [ 0, 1, 1, 1, 1, 1, 1, 0 ]
* > ];
* > var m = new Maze(maze, 0, 0, 7, 7);
* > m.echo();
*/
function Maze(maze, x, y, epx, epy) {
this.ways = []; // 总线路
this.bestWay = []; // 最优线路
this.badWay = []; // 最差线路
this.length = 0; // 解集数
var x = x || 0,
y = y || 0,
epx = epx || maze[maze.length-1].length-1,
epy = epy || maze.length-1,
dx = [-1, 1, 0, 0], // 左右
dy = [0, 0, 1, -1], // 下上
m = clone(maze),
_self = this;
// run
(function(x, y){
var nx, ny;
m[y][x] = '*'; // 到此一游
for (var i=0; i<4; i++) {
nx = x + dx[i];
ny = y + dy[i];
if (ny>=0 && ny<m.length && nx>=0 && nx<m[ny].length && m[ny][nx]===0) {
if (nx===epx && ny===epy) {
_self.ways.push(clone(m));
} else {
arguments.callee(nx, ny);
}
}
}
m[y][x] = 0; // 此路不通,请绕路
})(x, y);
// 结果处理
this.length = this.ways.length;
this.bestWay.step = Number.MAX_VALUE;
this.badWay.step = 0;
for (var i=0; i<this.length; i++) {
this.ways[i].step = this.ways[i].join(',').replace(/,|1|0/g,'').length;
this.ways[i][epy][epx] = '*'; // 终点标记
this.bestWay.step > this.ways[i].step ? this.bestWay = this.ways[i] : 0;
this.badWay.step < this.ways[i].step ? this.badWay = this.ways[i] : 0;
}
// 拷贝maze
function clone(maze) {
var a = [];
for (var i=0; i<maze.length; i++) {
a[i] = maze[i].slice();
}
return a;
}
}
// 输出方法,需浏览器console支持,删除该方法不影响本迷宫类
Maze.prototype.echo = function(sch){
switch(sch) {
case 1: // 全部解法
var w = this.ways;
for (var i=0; i<w.length; i++) {
console.log('The way ' + i + ' , step:'+w[i].step);
console.log(w[i].join('\n').replace(/,/g, ' '));
}
break;
case 2: // 最差解法
console.log('The bad way, step:'+this.badWay.step);
console.log(this.badWay.join('\n').replace(/,/g, ' '));
break;
default: //最优解法
console.log('The best way, step:'+this.bestWay.step);
console.log(this.bestWay.join('\n').replace(/,/g, ' '));
}
};
使用方法:var maze = [
[ 0, 0, 0, 0, 1, 0, 0, 0 ],
[ 0, 1, 1, 1, 1, 0, 1, 0 ],
[ 0, 0, 0, 0, 1, 0, 1, 0 ],
[ 0, 1, 0, 0, 0, 0, 1, 0 ],
[ 0, 1, 0, 1, 1, 0, 1, 0 ],
[ 0, 1, 0, 0, 1, 0, 1, 0 ],
[ 0, 1, 0, 0, 1, 0, 0, 0 ],
[ 0, 1, 1, 1, 1, 1, 1, 0 ]
];
var m = new Maze(maze, 0, 0, 7, 7);
m.echo(1);
结果: