地圖軌跡回放

<!DOCTYPE html>
<html>
<head>
<meta name="viewport" content="initial-scale=1.0, user-scalable=no" />
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>Track</title>
<style type="text/css">
html{height:100%}
body{height:100%;margin:0px;padding:0px}
#controller{width:100%; border-bottom:3px outset; height:30px; filter:alpha(Opacity=100); -moz-opacity:1; opacity:1; z-index:10000; background-color:lightblue;}
#container{height:100%}
</style>
<script type="text/javascript" src="http://api.map.baidu.com/api?v=1.5&ak=D2b4558ebed15e52558c6a766c35ee73"></script>
<script type="text/javascript">
//获取所有点的坐标
var points = [
new BMap.Point(113.443454,22.356331), 
new BMap.Point(113.454682,22.370929)
];
var map; //百度地图对象
var car; //汽车图标
var label; //信息标签
var centerPoint;
var timer; //定时器
var index = 0; //记录播放到第几个point
var followChk, playBtn, pauseBtn, resetBtn; //几个控制按钮
function init() {
followChk = document.getElementById("follow");
playBtn = document.getElementById("play");
pauseBtn = document.getElementById("pause");
resetBtn = document.getElementById("reset");
//初始化地图,选取第一个点为起始点
map = new BMap.Map("container");
map.centerAndZoom(points[0], 15);
map.enableScrollWheelZoom();
map.addControl(new BMap.NavigationControl());
map.addControl(new BMap.ScaleControl());
map.addControl(new BMap.OverviewMapControl({isOpen: true}));
//通过DrivingRoute获取一条路线的point
var driving = new BMap.DrivingRoute(map);
driving.search(new BMap.Point(113.443454,22.356331),new BMap.Point(113.454682,22.370929) );
driving.setSearchCompleteCallback(function() {
//得到路线上的所有point
points = driving.getResults().getPlan(0).getRoute(0).getPath();
//画面移动到起点和终点的中间
centerPoint = new BMap.Point((points[0].lng + points[points.length - 1].lng) / 2, (points[0].lat + points[points.length - 1].lat) / 2);
map.panTo(centerPoint);
//连接所有点
map.addOverlay(new BMap.Polyline(points, {strokeColor: "black", strokeWeight: 5, strokeOpacity: 1}));
//显示小车子
label = new BMap.Label("", {offset: new BMap.Size(-20, -20)});
car = new BMap.Marker(points[0]);
car.setLabel(label);
map.addOverlay(car);
//点亮操作按钮
playBtn.disabled = false;
resetBtn.disabled = false;
});
}
function play() {
playBtn.disabled = true;
pauseBtn.disabled = false;
var point = points[index];
if(index > 0) {
map.addOverlay(new BMap.Polyline([points[index - 1], point], {strokeColor: "red", strokeWeight: 1, strokeOpacity: 1}));
}
label.setContent("经度: " + point.lng + "<br>纬度: " + point.lat);
car.setPosition(point);
index++;
if(followChk.checked) {
map.panTo(point);
}
if(index < points.length) {
timer = window.setTimeout("play(" + index + ")", 200);
} else {
playBtn.disabled = true;
pauseBtn.disabled = true;
map.panTo(point);
}
}
function pause() {
playBtn.disabled = false;
pauseBtn.disabled = true;
if(timer) {
window.clearTimeout(timer);
}
}
function reset() {
followChk.checked = false;
playBtn.disabled = false;
pauseBtn.disabled = true;
if(timer) {
window.clearTimeout(timer);
}
index = 0;
car.setPosition(points[0]);
map.panTo(centerPoint);
}
</script>
</head>
<body onload="init();">
<div id="controller" align="center">
<input id="follow" type="checkbox"><span style="font-size:12px;">画面跟随</span></input>
<input id="play" type="button" value="播放" onclick="play();" disabled />
<input id="pause" type="button" value="暂停" onclick="pause();" disabled />
<input id="reset" type="button" value="重置" onclick="reset()" disabled />
</div>
<div id="container"></div>
</body>
</html>
百度地圖經緯度拾取：http://api.map.baidu.com/lbsapi/getpoint/index.html