百度地图轨迹回放,自定义路书,边走边画线
在原有的百度路书的基础上,做了修改,使其能实现边走边画线的需求.
源代码如下,其中您的密钥要换成自己的,如果不换,则需要粘贴到百度API示例里面的GPS路书的编辑器中才能运行
<html lang="en">
<head>
<meta charset="utf-8" />
<title>轨迹回放(路书)</title>
<style type="text/css">
body, html{width: 100%;height: 100%;margin:0;font-family:"微软雅黑";}
#map_canvas{width:100%;height:500px;}
#result {width:100%}
</style>
<script src="http://api.map.baidu.com/api?v=2.0&ak=您的密钥"></script>
<script type="text/javascript" src="http://api.map.baidu.com/library/LuShu/1.2/src/LuShu_min.js"></script>
</head>
<body>
<div id="map_canvas"></div>
<div id="result"></div>
<button id="run">开始</button>
<button id="stop">停止</button>
<button id="pause">暂停</button>
<button id="hide">隐藏信息窗口</button>
<button id="show">展示信息窗口</button>
<script>
var marker;
var map = new BMap.Map('map_canvas');
map.enableScrollWheelZoom();
map.centerAndZoom();
var lushu;
// 实例化一个驾车导航用来生成路线
// var drv = new BMap.DrivingRoute('北京', {
// onSearchComplete: function(res) {
// if (drv.getStatus() == BMAP_STATUS_SUCCESS) {
// var plan = res.getPlan(0);
// var arrPois =[];
// for(var j=0;j<plan.getNumRoutes();j++){
// var route = plan.getRoute(j);
// arrPois= arrPois.concat(route.getPath());
// }
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BMap.Point(116.305325,40.055946),new BMap.Point(116.305566,40.055212),new BMap.Point(116.305647,40.054951),new BMap.Point(116.305747,40.05494),new BMap.Point(116.305717,40.05502),new BMap.Point(116.305717,40.055019),new BMap.Point(116.305647,40.05523),new BMap.Point(116.305416,40.055964),new BMap.Point(116.305295,40.056375),new BMap.Point(116.305034,40.057169),new BMap.Point(116.304773,40.058033),new BMap.Point(116.304772,40.058033),new BMap.Point(116.306491,40.058347),new BMap.Point(116.306492,40.058347),new BMap.Point(116.306914,40.05729),new BMap.Point(116.306954,40.05717),new BMap.Point(116.306954,40.05717),new BMap.Point(116.306974,40.057169)];
// map.addOverlay(new BMap.Polyline(arrPois, {strokeColor: '#111'})); //不画线
map.setViewport(arrPois);
marker=new BMap.Marker(arrPois[0],{
icon : new BMap.Icon('http://developer.baidu.com/map/jsdemo/img/car.png', new BMap.Size(52,26),{anchor : new BMap.Size(27, 13)})
});
var label = new BMap.Label("粤A30780",{offset:new BMap.Size(0,-30)});
label.setStyle({border:"1px solid rgb(204, 204, 204)",color: "rgb(0, 0, 0)",borderRadius:"10px",padding:"5px",background:"rgb(255, 255, 255)",});
marker.setLabel(label);
map.addOverlay(marker);
BMapLib.LuShu.prototype._move=function(initPos,targetPos,effect) {
var pointsArr=[initPos,targetPos]; //点数组
var me = this,
//当前的帧数
currentCount = 0,
//步长，米/秒
timer = 10,
step = this._opts.speed / (1000 / timer),
//初始坐标
init_pos = this._projection.lngLatToPoint(initPos),
//获取结束点的(x,y)坐标
target_pos = this._projection.lngLatToPoint(targetPos),
//总的步长
count = Math.round(me._getDistance(init_pos, target_pos) / step);
//显示折线 syj201607191107
this._map.addOverlay(new BMap.Polyline(pointsArr, {
strokeColor : "#111",
strokeWeight : 5,
strokeOpacity : 0.5
})); // 画线
//如果小于1直接移动到下一点
if (count < 1) {
me._moveNext(++me.i);
return;
}
me._intervalFlag = setInterval(function() {
//两点之间当前帧数大于总帧数的时候，则说明已经完成移动
if (currentCount >= count) {
clearInterval(me._intervalFlag);
//移动的点已经超过总的长度
if(me.i > me._path.length){
return;
}
//运行下一个点
me._moveNext(++me.i);
}else {
currentCount++;
var x = effect(init_pos.x, target_pos.x, currentCount, count),
y = effect(init_pos.y, target_pos.y, currentCount, count),
pos = me._projection.pointToLngLat(new BMap.Pixel(x, y));
//设置marker
if(currentCount == 1){
var proPos = null;
if(me.i - 1 >= 0){
proPos = me._path[me.i - 1];
}
if(me._opts.enableRotation == true){
me.setRotation(proPos,initPos,targetPos);
}
if(me._opts.autoView){
if(!me._map.getBounds().containsPoint(pos)){
me._map.setCenter(pos);
}
}
}
//正在移动
me._marker.setPosition(pos);
//设置自定义overlay的位置
me._setInfoWin(pos);
}
},timer);
};
lushu = new BMapLib.LuShu(map,arrPois,{
defaultContent:"粤A30780",//"从天安门到百度大厦"
autoView:true,//是否开启自动视野调整，如果开启那么路书在运动过程中会根据视野自动调整
icon : new BMap.Icon('http://developer.baidu.com/map/jsdemo/img/car.png', new BMap.Size(52,26),{anchor : new BMap.Size(27, 13)}),
speed: 4500,
enableRotation:true,//是否设置marker随着道路的走向进行旋转
landmarkPois:[
{lng:116.306954,lat:40.05718,html:'加油站',pauseTime:2}
]
});
marker.addEventListener("click",function(){
marker.enableMassClear(); //设置后可以隐藏改点的覆盖物
marker.hide();
lushu.start();
//map.clearOverlays(); //清除所有覆盖物
});
//}
// }
// });
//drv.search('天安门', '百度大厦');
// lushu.start();
// lushu.pause();
//绑定事件
$("run").onclick = function(){
marker.enableMassClear(); //设置后可以隐藏改点的覆盖物
marker.hide();
lushu.start();
// map.clearOverlays(); //清除所有覆盖物
}
$("stop").onclick = function(){
lushu.stop();
}
$("pause").onclick = function(){
lushu.pause();
}
$("hide").onclick = function(){
lushu.hideInfoWindow();
}
$("show").onclick = function(){
lushu.showInfoWindow();
}
function $(element){
return document.getElementById(element);
}
</script>
</body>
</html>
其中,arrPois的点是自定义点,非常适合做轨迹回放用.
注意:landmarkPois 必须要定义,如果没有要显示的点话,就写成[],不能为空,否则会无法运行.
实现边走边画线,首先将百度路书中的画线代码注释掉,然后重写_move方法,参见代码中的重写_move方法.基于此可以实现更加复杂的各种附加信息.
其效果如下图:
也算是给后人留点启发吧
