迷宫实现
迷宫生成
- 采用递归的思想，先用十字交叉线将迷宫分为四部分，从任意的四部分中选择三个，开一个小口，这样这四部分就是一个连通的整体，再依次将一个小部分递归生成四个更小的部分，这样，最后将生成具有路径的迷宫。
迷宫路径
- 采用广度优先法寻找最短的路径。
代码
<html lang="en">
<head>
<meta charset="UTF-8">
<title>迷宫title>
<script src="vue.min.js">script>
<link rel="stylesheet" href="maze.css">
head>
<body>
<div id="app">
<canvas id="can">canvas>
<div id="enter">入口div>
<div id="exit">出口div>
<div id="butt">
<button @click="change">随机生成迷宫button>
<button @click="way">生成路径button>
div>
div>
body>
<script>
var Main = {
data() {
return {
/* 迷宫横布局 */
maze_hor: [],
/* 迷宫竖布局 */
maze_col: [],
/* 路径 */
way_result: []
}
},
mounted: function () {
this.change();
},
methods: {
ini() {
this.maze_hor = [];
this.maze_col = [];
for (var i = 0; i < 16; i++) {
var temp = [];
for (var j = 0; j < 17; j++) {
if (j === 0 || j === 16)
temp.push(1);
else
temp.push(0)
}
this.maze_hor.push(temp);
}
for (var i = 0; i < 17; i++) {
var temp = [];
for (var j = 0; j < 16; j++) {
if (i === 0 || i === 16)
temp.push(1);
else
temp.push(0)
}
this.maze_col.push(temp);
}
},
change() {
/* 清除画布 */
var c = document.getElementById("can");
var ctx = c.getContext("2d");
ctx.clearRect(0, 0, c.width, c.height);
/* 初始化数组 */
this.ini();
/* 预留入口出口 */
this.maze_col[0][0] = 0;
this.maze_col[16][15] = 0;
var temp1 = Math.floor(Math.random() * 15) + 1;
var temp2 = Math.floor(Math.random() * 15) + 1;
/* 生成迷宫数组 */
this.generate(temp1, 0, 16, temp2, 0, 16);
/* 画迷宫 */
this.draw();
},
generate(hor_y, hor_x_l, hor_x_r, col_x, col_y_t, col_y_b) {
if (hor_y === col_y_t || hor_y === col_y_b || col_x === hor_x_l || col_x === hor_x_r)
return;
for (var i = hor_x_l; i < hor_x_r; i++) {
this.maze_hor[i][hor_y] = 1;
}
for (var i = col_y_t; i < col_y_b; i++) {
this.maze_col[col_x][i] = 1;
}
var tempNum = Math.floor(Math.random() * 4);
var tempNum_l = Math.floor(Math.random() * (col_x - hor_x_l)) + 1;
var tempNum_r = Math.floor(Math.random() * (hor_x_r - col_x)) + 1;
var tempNum_t = Math.floor(Math.random() * (hor_y - col_y_t)) + 1;
var tempNum_b = Math.floor(Math.random() * (col_y_b - hor_y)) + 1;
if (tempNum === 0) {
this.maze_hor[col_x + tempNum_r - 1][hor_y] = 0;
this.maze_col[col_x][hor_y - tempNum_t] = 0;
this.maze_col[col_x][hor_y + tempNum_b - 1] = 0;
}
if (tempNum === 1) {
this.maze_hor[col_x - tempNum_l][hor_y] = 0;
this.maze_col[col_x][hor_y - tempNum_t] = 0;
this.maze_col[col_x][hor_y + tempNum_b - 1] = 0;
}
if (tempNum === 2) {
this.maze_hor[col_x - tempNum_l][hor_y] = 0;
this.maze_hor[col_x + tempNum_r - 1][hor_y] = 0;
this.maze_col[col_x][hor_y + tempNum_b - 1] = 0;
}
if (tempNum === 3) {
this.maze_hor[col_x - tempNum_l][hor_y] = 0;
this.maze_hor[col_x + tempNum_r - 1][hor_y] = 0;
this.maze_col[col_x][hor_y - tempNum_t] = 0;
}
var temp_t = Math.floor(Math.random() * (hor_y - col_y_t - 1)) + 1;
var temp_b = Math.floor(Math.random() * (col_y_b - hor_y - 1)) + 1;
var temp_l = Math.floor(Math.random() * (col_x - hor_x_l - 1)) + 1;
var temp_r = Math.floor(Math.random() * (hor_x_r - col_x - 1)) + 1;
this.generate(hor_y + temp_b, hor_x_l, col_x, col_x - temp_l, hor_y, col_y_b);
this.generate(hor_y + temp_b, col_x, hor_x_r, col_x + temp_r, hor_y, col_y_b);
this.generate(hor_y - temp_t, hor_x_l, col_x, col_x - temp_l, col_y_t, hor_y);
this.generate(hor_y - temp_t, col_x, hor_x_r, col_x + temp_r, col_y_t, hor_y);
},
draw() {
var cell_width = 30;
var cell_height = 30;
var c = document.getElementById("can");
c.width = 480;
c.height = 480;
var ctx = c.getContext("2d");
ctx.lineWidth = 2;
for (var i = 0; i < this.maze_hor.length; i++) {
for (var j = 0; j < this.maze_hor.length + 1; j++) {
if (this.maze_hor[i][j] === 1) {
ctx.beginPath();
ctx.moveTo(i * cell_width, j * cell_height);
ctx.lineTo((i + 1) * cell_width, j * cell_height);
ctx.stroke();
}
}
}
for (var i = 0; i < this.maze_col.length; i++) {
for (var j = 0; j < this.maze_col.length - 1; j++) {
if (this.maze_col[i][j] === 1) {
ctx.beginPath();
ctx.moveTo(i * cell_width, j * cell_height);
ctx.lineTo(i * cell_width, (j + 1) * cell_height);
ctx.stroke();
}
}
}
},
way() {
/* 标志节点是否访问过 */
var visited = [];
for (var i = 0; i < 16; i++) {
var temp = [];
for (var j = 0; j < 16; j++) {
temp.push(0)
}
visited.push(temp)
}
/* 存放x坐标 */
var queue_x = [];
/* 存放y坐标 */
var queue_y = [];
/* 存放访问路径 */
var queue_way = [];
queue_x.push(0);
queue_y.push(0);
var tempArr = [[0], [0]];
queue_way.push(tempArr);
var way_result = [];
while (queue_x.length > 0 && queue_y.length > 0) {
var x = queue_x.shift();
var y = queue_y.shift();
var temp_way = queue_way.shift();
visited[x][y] = 1;
if (x === 15 && y === 15) {
way_result = temp_way;
break;
}
if (y > 0 && visited[x][y - 1] === 0 && this.maze_hor[x][y] === 0) {
queue_x.push(x);
queue_y.push(y - 1);
var temp2 = [];
for (var m = 0; m < temp_way.length; m++) {
var temp2Arr = [];
for (var n = 0; n < temp_way[m].length; n++) {
temp2Arr.push(temp_way[m][n])
}
temp2.push(temp2Arr)
}
temp2[0].push(x);
temp2[1].push(y - 1);
queue_way.push(temp2);
}
if (y < 15 && visited[x][y + 1] === 0 && this.maze_hor[x][y + 1] === 0) {
queue_x.push(x);
queue_y.push(y + 1);
var temp2 = [];
for (var m = 0; m < temp_way.length; m++) {
var temp2Arr = [];
for (var n = 0; n < temp_way[m].length; n++) {
temp2Arr.push(temp_way[m][n])
}
temp2.push(temp2Arr)
}
temp2[0].push(x);
temp2[1].push(y + 1);
queue_way.push(temp2);
}
if (x > 0 && visited[x - 1][y] === 0 && this.maze_col[x][y] === 0) {
queue_x.push(x - 1);
queue_y.push(y);
var temp2 = [];
for (var m = 0; m < temp_way.length; m++) {
var temp2Arr = [];
for (var n = 0; n < temp_way[m].length; n++) {
temp2Arr.push(temp_way[m][n])
}
temp2.push(temp2Arr)
}
temp2[0].push(x - 1);
temp2[1].push(y);
queue_way.push(temp2);
}
if (x < 15 && visited[x + 1][y] === 0 && this.maze_col[x + 1][y] === 0) {
queue_x.push(x + 1);
queue_y.push(y);
var temp2 = [];
for (var m = 0; m < temp_way.length; m++) {
var temp2Arr = [];
for (var n = 0; n < temp_way[m].length; n++) {
temp2Arr.push(temp_way[m][n])
}
temp2.push(temp2Arr)
}
temp2[0].push(x + 1);
temp2[1].push(y);
queue_way.push(temp2);
}
}
this.way_result = [];
for (var i = 0; i < way_result.length; i++) {
var temp3Arr = [];
for (var j = 0; j < way_result[i].length; j++) {
temp3Arr.push(way_result[i][j]);
}
this.way_result.push(temp3Arr);
}
this.draw_way();
},
draw_way() {
var cell_width = 30;
var cell_height = 30;
var c = document.getElementById("can");
var ctx = c.getContext("2d");
ctx.lineWidth = 5;
ctx.lineJoin = "round";
ctx.strokeStyle = "#FF0000";
ctx.beginPath();
ctx.moveTo(0, cell_height / 2);
for (var i = 0; i < this.way_result[0].length; i++) {
ctx.lineTo(this.way_result[0][i] * cell_width + cell_width / 2, this.way_result[1][i] * cell_height + cell_height / 2);
}
ctx.lineTo(16 * cell_width, 15.5 * cell_height);
ctx.stroke();
}
}
};
var Ctor = Vue.extend(Main);
new Ctor().$mount('#app')
script>
html>
maze.css文件
html, body {
width: 100%;
height: 100%;
margin: 0;
}
body {
display: flex;
justify-content: center;
align-items: center;
}
#app {
width: 100%;
height: 100%;
display: flex;
justify-content: center;
align-items: center;
flex-direction: column;
}
#can {
background-color: darkgrey;
width: 480px;
height: 480px;
}
#enter {
position: relative;
right: 280px;
bottom: 480px;
}
#exit {
position: relative;
left: 280px;
bottom: 50px;
}
#butt {
width: 480px;
height: 50px;
margin-top: 20px;
display: flex;
justify-content: center;
align-items: center;
}
#butt button{
margin-right: 50px;
}
截图
