<!DOCTYPE HTML>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<title>无标题文档</title>
<style>
*{ margin:0; padding:0;}
li{ list-style:none;}
#ul1{ height:auto; overflow:hidden; margin:20px auto; border:1px #000 solid; border-bottom:none; border-right:none;}
#ul1 li{border:1px #000 solid; border-top:none; border-left:none; float:left;}
#ul1 li.sty1{ background:red;}
#ul1 li.sty2{ background:green;}
#ul1 li.sty3{ background:blue;}
#input1{ width:100px; position:absolute; left:50%; margin-left:-50px;}
</style>
</head>
<body>
<ul id="ul1">
</ul>
<input type="button" value="开始寻路" id="input1">
<script>
var oUl = document.getElementById('ul1');
var aLi = oUl.getElementsByTagName('li');
var oInput = document.getElementById('input1');
var beginLi = oUl.getElementsByClassName('sty1');
var endLi = oUl.getElementsByClassName('sty2');
var map = [
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
0,0,0,0,0,3,3,3,3,3,3,0,0,0,0,0,0,0,0,0,
0,0,0,0,0,0,0,0,0,0,3,0,0,0,0,0,0,0,0,0,
0,0,0,0,0,0,0,0,0,0,3,0,0,0,0,0,0,0,0,0,
0,0,0,0,1,0,0,0,0,0,3,0,0,0,0,0,0,0,0,0,
0,0,0,0,0,0,0,0,0,0,3,0,0,0,0,0,0,0,0,0,
0,0,0,0,0,0,0,0,0,0,3,0,0,0,0,0,0,0,0,0,
0,0,0,0,0,0,0,0,0,0,3,0,0,0,0,0,0,0,0,0,
0,0,0,0,0,0,0,0,0,0,3,0,0,0,0,0,0,0,0,0,
0,0,0,0,0,0,0,0,0,0,3,0,0,0,0,0,0,0,0,0,
0,0,0,0,0,0,0,0,0,0,3,0,0,0,0,2,0,0,0,0,
0,0,0,0,0,0,0,0,0,0,3,0,0,0,0,0,0,0,0,0,
0,0,0,0,0,0,0,0,0,0,3,0,0,0,0,0,0,0,0,0,
0,0,0,0,0,3,3,3,3,3,3,0,0,0,0,0,0,0,0,0,
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,
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
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
];
var cols = Math.sqrt(map.length);
var sizeGird = 20;
var openArr = [];
var closeArr = [];
init();
function init(){
createMap();
oInput.onclick = function(){
openFn();
};
}
function createMap(){
oUl.style.width = cols * (sizeGird + 1) + 'px';
for(var i=0;i<map.length;i++){
var oLi = document.createElement('li');
oLi.style.width = sizeGird + 'px';
oLi.style.height = sizeGird + 'px';
oUl.appendChild(oLi);
if( map[i] == 1 ){
oLi.className = 'sty1';
openArr.push(oLi);
}
else if(map[i] == 2){
oLi.className = 'sty2';
}
else if(map[i] == 3){
oLi.className = 'sty3';
closeArr.push(oLi);
}
}
}
function openFn(){
var nowLi = openArr.shift();
if( nowLi == endLi[0] ){
showLine();
return;
}
closeFn(nowLi);
findLi(nowLi);
//console.log( openArr );
openArr.sort(function(li1,li2){
return li1.num - li2.num;
});
//console.log( openArr );
openFn();
}
function closeFn(nowLi){
closeArr.push( nowLi );
}
function findLi(nowLi){
var result = [];
for(var i=0;i<aLi.length;i++){
if( filter(aLi[i]) ){
result.push( aLi[i] );
}
}
function filter(li){
for(var i=0;i<closeArr.length;i++){
if( closeArr[i] == li ){
return false;
}
}
for(var i=0;i<openArr.length;i++){
if( openArr[i] == li ){
return false;
}
}
return true;
}
for(var i=0;i<result.length;i++){
if( (Math.abs(nowLi.offsetLeft - result[i].offsetLeft)<= sizeGird + 1) && (Math.abs(nowLi.offsetTop - result[i].offsetTop)<= sizeGird + 1) ){
result[i].num = f(result[i]);
result[i].parent = nowLi;
openArr.push( result[i] );
}
}
}
function showLine(){
var result = [];
var lastLi = closeArr.pop();
var iNow = 0;
findParent(lastLi);
function findParent(li){
result.unshift(li);
if( li.parent == beginLi[0] ){
return;
}
findParent(li.parent);
}
var timer = setInterval(function(){
result[iNow].style.background = 'red';
iNow++;
if(iNow == result.length){
clearInterval(timer);
}
},500);
}
function f(nodeLi){
return g(nodeLi) + h(nodeLi);
}
function g(nodeLi){
var a = beginLi[0].offsetLeft - nodeLi.offsetLeft;
var b = beginLi[0].offsetTop - nodeLi.offsetTop;
return Math.sqrt(a*a + b*b);
}
function h(nodeLi){
var a = endLi[0].offsetLeft - nodeLi.offsetLeft;
var b = endLi[0].offsetTop - nodeLi.offsetTop;
return Math.sqrt(a*a + b*b);
}
</script>
</body>
</html>
