用寻路算法写的一个小项目
地址
https://a1115040996.github.io/arithmetic/html/寻路应用.html
没来得及仔细优化，后面再优化
代码如下
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title></title>
<link rel="stylesheet" type="text/css" href="../css/way-finding.css"/>
</head>
<body>
<ul id="ul-table">
</ul>
<script src="../js/plugin/jquery-2.1.0.js" type="text/javascript" charset="utf-8"></script>
<script type="text/javascript">
/*************************************
* 估价函数
* f(n) = g(n) + h(n)
* g(n) 起始点距离目标点的距离
* h(n) 结束点距离目标点的距离
* f(n) 估价 最小距离为最优解决方案
*
*
* 创建矩阵
* 1. 起点
* 2. 终点
* 3. 障碍
* 4. 移动路径
**************************************/
var sizeGrid = 25;// 点的长宽
var startLocation;// 起点
var endLocation;// 终点
var openArr = [];// 开始点
var closeArr = [];// 结束点结果
var rocksArr = []; //障碍物
var canClose = true; // 是否已经找到路径
var mList = [0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
0,0,0,3,3,0,0,0,0,3,0,0,0,0,3,3,0,0,0,0,
0,0,0,1,3,0,0,0,0,3,0,0,0,0,3,3,0,0,0,0,
0,0,0,0,3,0,0,0,0,3,0,0,0,0,0,0,0,0,0,0,
0,0,0,3,3,3,0,0,0,3,0,0,0,0,0,0,0,0,0,0,
0,0,0,0,0,3,0,0,0,3,0,0,0,0,0,0,0,0,0,0,
0,0,0,0,3,3,0,0,0,3,0,0,0,0,0,0,0,0,0,0,
0,0,0,0,0,0,0,0,0,3,0,0,0,0,0,0,0,0,0,0,
0,0,0,0,0,0,0,0,0,3,0,3,3,3,0,0,0,0,0,0,
0,0,0,0,0,0,0,0,0,3,0,3,0,0,0,0,0,0,0,0,
0,0,0,3,3,3,3,3,3,3,0,3,3,3,0,0,0,0,0,0,
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0]
function createList(list){
$("#ul-table").width(sizeGrid*20+1+1)
var fragment = document.createDocumentFragment()
for (var i=0;len = list.length,i<len;i++) {
var _li = $(‘<li uid=‘+(i+1)+‘ x=‘+(i % 20 + 1)+‘ y=‘+(Math.floor(i / 20)+1)+‘></li>‘).css({‘width‘: sizeGrid,‘height‘:sizeGrid})
if(list[i] === 1){ // 起始点
startLocation = _li
openArr.push(_li)
_li.addClass(‘start‘)
}else if(list[i] === 2){ // 结束点
endLocation = _li
_li.addClass(‘end‘)
//closeArr.push(_li)
}else if(list[i] === 3){ // 障碍
closeArr.push(_li)
rocksArr.push(_li)
_li.addClass(‘remora‘)
}else if(list[i] === 4){ // 移动点
_li.addClass(‘move‘)
}
fragment.appendChild(_li[0])
}
return fragment
}
$("#ul-table").append(createList(mList))
// 寻迹算法
function f(nodeGrid){
return g(nodeGrid) + h(nodeGrid)
}
// 目标点 距离起始点的距离
function g(nodeGrid){
var a = nodeGrid.offset().left - startLocation.offset().left
var b = nodeGrid.offset().top - startLocation.offset().top
return Math.sqrt(a*a + b*b)
}
// 目标点距离结束点的距离
function h(nodeGrid){
var a = nodeGrid.offset().left - endLocation.offset().left
var b = nodeGrid.offset().top - endLocation.offset().top
return Math.sqrt(a*a + b*b)
}
// 获取可能的落脚点
function findNextStepList(){
var result = [];// 存储结果集
var preStep = openArr.shift()
var startX = +preStep.attr(‘x‘)
var startY = +preStep.attr(‘y‘)
closeArr.push(preStep)
getPossibleGrid(startX, startY)
// 获取可能的落脚点
function getPossibleGrid(x,y){
var _startX = (x-1) > 1 ? (x-1) : x;
var _startY = (y-1) > 1 ? (y-1) : y;
var _endX = (x+1) <= 20 ? (x+1) : x;
var _endY = (y+1) <= 20 ? (y+1) : y;
for(var i=_startX;i<=_endX;i++){
for (var j=_startY;j<=_endY;j++) {
if(!(i===startX&&j===startY)){
if(locationFilter(i,j)){
console.log()
$(‘li[x=‘+i+‘][y=‘+j+‘]‘)[0].par = preStep
$(‘li[x=‘+i+‘][y=‘+j+‘]‘)[0].distance = f($(‘li[x=‘+i+‘][y=‘+j+‘]‘))
openArr.push($(‘li[x=‘+i+‘][y=‘+j+‘]‘))
if(endLocation.attr(‘x‘)==i&&endLocation.attr(‘y‘)==j){
canClose = false
}
}
}
}
}
// 排序
openArr.sort(function(v1, v2){
return v1[0].distance - v2[0].distance
})
// 从数据中去除关闭的 和 已经设置父级指针的
function locationFilter(x,y){
for (var i=0;i<closeArr.length;i++) {
if(+closeArr[i].attr(‘x‘) === x && +closeArr[i].attr(‘y‘) === y){
return false
}
}
for (var i=0;i<openArr.length;i++) {
if(+openArr[i].attr(‘x‘) === x && +openArr[i].attr(‘y‘) === y){
return false
}
}
return true
}
}
}
// 寻路
function findLocationLoop(){
while(canClose){
findNextStepList()
}
}
function getRecallLocation(){
var result = []
function getRecall(dom){
if($(dom).attr(‘x‘)==startLocation.attr(‘x‘)&&$(dom).attr(‘y‘)==startLocation.attr(‘y‘)){
return result
}else{
result.push(dom)
getRecall(dom[0].par)
}
}
getRecall(closeArr.pop())
return result
}
//findLocationLoop()
/*$("#startFind").click(function(){
findLocationLoop()
var result = getRecallLocation()
result.forEach(function(v,i){
v.addClass(‘move‘)
})
})
*/
$("li").click(function(){
if(this.className!==‘remora‘){
$("li").removeClass(‘end‘).removeClass(‘move‘)
$(this).addClass(‘end‘)
endLocation = $("li[uid="+($(this).index()+1)+"]")
openArr = [startLocation]
closeArr = [...rocksArr]
canClose = true
findLocationLoop()
console.log(openArr)
var result = getRecallLocation().reverse()
result.push(endLocation)
console.log(result)
result.forEach(function(v,i){
var timer = setTimeout(function(){
$("li").removeClass(‘start‘)
v.addClass(‘start‘)
if(i>=result.length-1){
startLocation = v
$("li.end").removeClass(‘end‘)
}
},120*i)
})
}
})
</script>
</body>
</html>
原文：https://www.cnblogs.com/MainActivity/p/10342315.html