#1-站点下加载多个车辆在地图显示
```js
//gps2Amap 自己封装高德文档api转换坐标
this.gps2Amap(position, function(location) {
try {
var markerMini = new AMap.Marker({
position: [location[0].lng, location[0].lat],
extData: {
id: carId
},
zIndex: 100
});
markerMini.setContent(
`<div class="bubble-box"><div class="car-inactive"></div></div>`
);
markerMini.on("click", function(e) {
if (_this.clickedMarker === e.target) return;
⭐ _this.clickShowRoute(carSn);
_this.clickedMarker = e.target;
});
}
_this.markersMap.set(carSn, markerMini); //使用映射方便socket传输操作
} catch (err) {
}
});
//注意异步操作
```
2-点击车辆绘制路线防止重复点击
```js
const promise = new Promise((resolve, reject) => {
try {
this._getCarAndTrackRoute(code);
} catch (err) {
}
resolve();
});
promise.then(() => {
setTimeout(() => {
overlayGroups = new AMap.OverlayGroup(markers); //此处覆盖物添加到高德地图
_Map.add(overlayGroups);
_Map.setFitView();
}, 2000);
});
```
3-动态显示信息窗体内数据
> https://lbs.amap.com/api/subway-api/guide/station-information/infowindow/
```js
infoWindow = new AMap.InfoWindow({
isCustom: true,
draggable: true, //是否可拖动
offset: new AMap.Pixel(0, -18),
content: ""
});
infoWindow.setContent(
`<div class="bubble-box">
目的地：${this.carDrivingInfo
.stationName || "暂无"}</div>`
);
if (e.lnglat !== undefined) {
infoWindow.open(_Map, e.lnglat);
} else {
infoWindow.open(_Map, e.getPosition());
}
```
4-点击覆盖物绘制路线
```js
path = [...];
const options = {
path: path,
isOutline: true,
outlineColor: "#0554F2",
borderWeight: 1,
strokeColor: "#0554F2",
strokeOpacity: 1,
strokeWeight: 3,
strokeStyle: "solid",
strokeDasharray: [10, 10],
lineJoin: "round",
lineCap: "round",
zIndex: 50
};
carBezierCurve = new AMap.BezierCurve(options);
_Map.add(carBezierCurve);
```
## 4-根据经纬度变化实时移动覆盖物
```js
currentMarker.setPosition([location[0].lng, location[0].lat]);
infoWindow.setPosition([location[0].lng, location[0].lat]);
currentMarker.setExtData({ isOnce: true });
```
last-绘制路线建议此js文件转换
```
/**
* 判断经纬度是否超出中国境内
*/
function isLocationOutOfChina(latitude, longitude) {
if (longitude < 72.004 || longitude > 137.8347 || latitude < 0.8293 || latitude > 55.8271)
return true;
return false;
}
/**
* 将WGS-84(国际标准)转为GCJ-02(火星坐标):
*/
function transformFromWGSToGCJ(latitude, longitude) {
var lat = "";
var lon = "";
var ee = 0.00669342162296594323;
var a = 6378245.0;
var pi = 3.14159265358979324;
if (isLocationOutOfChina(latitude, longitude)) {
lat = latitude;
lon = longitude;
}
else {
var adjustLat = transformLatWithXY(longitude - 105.0, latitude - 35.0);
var adjustLon = transformLonWithXY(longitude - 105.0, latitude - 35.0);
var radLat = latitude / 180.0 * pi;
var magic = Math.sin(radLat);
magic = 1 - ee * magic * magic;
var sqrtMagic = Math.sqrt(magic);
adjustLat = (adjustLat * 180.0) / ((a * (1 - ee)) / (magic * sqrtMagic) * pi);
adjustLon = (adjustLon * 180.0) / (a / sqrtMagic * Math.cos(radLat) * pi);
latitude = latitude + adjustLat;
longitude = longitude + adjustLon;
}
return { latitude: latitude, longitude: longitude };
}
/**
* 将GCJ-02(火星坐标)转为百度坐标:
*/
function transformFromGCJToBaidu(latitude, longitude) {
var pi = 3.14159265358979324 * 3000.0 / 180.0;
var z = Math.sqrt(longitude * longitude + latitude * latitude) + 0.00002 * Math.sin(latitude * pi);
var theta = Math.atan2(latitude, longitude) + 0.000003 * Math.cos(longitude * pi);
var a_latitude = (z * Math.sin(theta) + 0.006);
var a_longitude = (z * Math.cos(theta) + 0.0065);
return { latitude: a_latitude, longitude: a_longitude };
}
/**
* 将百度坐标转为GCJ-02(火星坐标):
*/
function transformFromBaiduToGCJ(latitude, longitude) {
var xPi = 3.14159265358979323846264338327950288 * 3000.0 / 180.0;
var x = longitude - 0.0065;
var y = latitude - 0.006;
var z = Math.sqrt(x * x + y * y) - 0.00002 * Math.sin(y * xPi);
var theta = Math.atan2(y, x) - 0.000003 * Math.cos(x * xPi);
var a_latitude = z * Math.sin(theta);
var a_longitude = z * Math.cos(theta);
return { latitude: a_latitude, longitude: a_longitude };
}
/**
* 将GCJ-02(火星坐标)转为WGS-84:
*/
function transformFromGCJToWGS(latitude, longitude) {
var threshold = 0.00001;
// The boundary
var minLat = latitude - 0.5;
var maxLat = latitude + 0.5;
var minLng = longitude - 0.5;
var maxLng = longitude + 0.5;
var delta = 1;
var maxIteration = 30;
while (true) {
var leftBottom = transformFromWGSToGCJ(minLat, minLng);
var rightBottom = transformFromWGSToGCJ(minLat, maxLng);
var leftUp = transformFromWGSToGCJ(maxLat, minLng);
var midPoint = transformFromWGSToGCJ((minLat + maxLat) / 2, (minLng + maxLng) / 2);
delta = Math.abs(midPoint.latitude - latitude) + Math.abs(midPoint.longitude - longitude);
if (maxIteration-- <= 0 || delta <= threshold) {
return { latitude: (minLat + maxLat) / 2, longitude: (minLng + maxLng) / 2 };
}
if (isContains({ latitude: latitude, longitude: longitude }, leftBottom, midPoint)) {
maxLat = (minLat + maxLat) / 2;
maxLng = (minLng + maxLng) / 2;
}
else if (isContains({ latitude: latitude, longitude: longitude }, rightBottom, midPoint)) {
maxLat = (minLat + maxLat) / 2;
minLng = (minLng + maxLng) / 2;
}
else if (isContains({ latitude: latitude, longitude: longitude }, leftUp, midPoint)) {
minLat = (minLat + maxLat) / 2;
maxLng = (minLng + maxLng) / 2;
}
else {
minLat = (minLat + maxLat) / 2;
minLng = (minLng + maxLng) / 2;
}
}
}
function isContains(point, p1, p2) {
return (point.latitude >= Math.min(p1.latitude, p2.latitude) && point.latitude <= Math.max(p1.latitude, p2.latitude)) && (point.longitude >= Math.min(p1.longitude, p2.longitude) && point.longitude <= Math.max(p1.longitude, p2.longitude));
}
function transformLatWithXY(x, y) {
var pi = 3.14159265358979324;
var lat = -100.0 + 2.0 * x + 3.0 * y + 0.2 * y * y + 0.1 * x * y + 0.2 * Math.sqrt(Math.abs(x));
lat += (20.0 * Math.sin(6.0 * x * pi) + 20.0 * Math.sin(2.0 * x * pi)) * 2.0 / 3.0;
lat += (20.0 * Math.sin(y * pi) + 40.0 * Math.sin(y / 3.0 * pi)) * 2.0 / 3.0;
lat += (160.0 * Math.sin(y / 12.0 * pi) + 320 * Math.sin(y * pi / 30.0)) * 2.0 / 3.0;
return lat;
}
function transformLonWithXY(x, y) {
var pi = 3.14159265358979324;
var lon = 300.0 + x + 2.0 * y + 0.1 * x * x + 0.1 * x * y + 0.1 * Math.sqrt(Math.abs(x));
lon += (20.0 * Math.sin(6.0 * x * pi) + 20.0 * Math.sin(2.0 * x * pi)) * 2.0 / 3.0;
lon += (20.0 * Math.sin(x * pi) + 40.0 * Math.sin(x / 3.0 * pi)) * 2.0 / 3.0;
lon += (150.0 * Math.sin(x / 12.0 * pi) + 300.0 * Math.sin(x / 30.0 * pi)) * 2.0 / 3.0;
return lon;
}
module.exports = {
isLocationOutOfChina: isLocationOutOfChina,
transformFromWGSToGCJ: transformFromWGSToGCJ,
transformFromGCJToBaidu: transformFromGCJToBaidu,
transformFromBaiduToGCJ: transformFromBaiduToGCJ,
transformFromGCJToWGS: transformFromGCJToWGS
}
```
