Using JavaScript and Tencent Maps to implement indoor map navigation functions

Title: Using JavaScript and Tencent Maps to realize indoor map navigation function

Introduction: With the rapid development of science and technology, indoor positioning and navigation technology have become the key to realizing indoor place navigation important tool. This article will introduce how to use JavaScript and Tencent Map API to implement map indoor navigation functions, and provide specific code examples.

1. Introduce Tencent Map API

Before implementing the map indoor navigation function, you first need to introduce Tencent Map API. Add the following code in the

tag of HTML:

<script src="https://map.qq.com/api/js?v=2.exp&key=YOUR_APP_KEY"></script>

needs to be replaced by YOUR_APP_KEY with your own Tencent Maps API key.

2. Create a map instance

Next, add a container for displaying the map in the tag:

<div id="map"></div>

Then, create the map in JavaScript Example, and set the initialization parameters:

var map = new qq.maps.Map(document.getElementById("map"), {
    center: new qq.maps.LatLng(39.90882, 116.39750), // 地图初始中心点
    zoom: 16, // 地图初始缩放级别
});

The center point and zoom level here can be adjusted according to actual needs.

3. Add indoor map

The indoor navigation function of Tencent Map requires the use of indoor map data. You can obtain the corresponding indoor map ID through the official website of Tencent Maps or other channels. Add the following code in JavaScript:

var indoorMapId = "YOUR_INDOOR_MAP_ID"; // 替换为你的室内地图ID
var indoorMap = new qq.maps.IndoorMap(map, indoorMapId);

This will load the corresponding indoor map on the map.

4. Create an indoor navigation control

In order to realize the indoor navigation function, we need to create a navigation control for the user to select the starting and ending points. Add the following code in HTML:

<div id="nav-control"></div>

Then, create the control in JavaScript and add the relevant event handler function:

var startPoint;
var endPoint;

// 创建导航控件
var navControl = new qq.maps.NavigationControl({
    map: map,
    align: qq.maps.ALIGN.TOP_RIGHT,
    margin: new qq.maps.Size(10, 10),
    visible: true,
    buttonPosition: qq.maps.ControlPosition.TOP_RIGHT
});

// 设置导航控件的起点和终点选择回调函数
navControl.setOnStartChoose(function() {
    startPoint = map.getCenter();
});

navControl.setOnEndChoose(function() {
    endPoint = map.getCenter();
});

Through the above code, the user can select the starting and ending points on the map .

5. Implement indoor navigation function

In order to implement indoor navigation function, we need to use the navigation service provided by Tencent Maps. Add the following code in JavaScript:

var service = new qq.maps.DirectionService();

// 创建室内导航控件
var indoorNavControl = new qq.maps.IndoorNavigationControl({
    map: map,
    startControl: navControl.getStartControl(),
    endControl: navControl.getEndControl(),
    typeControl: navControl.getTypeControl(),
    style: qq.maps.IndoorStyle.BLUE,
});

// 注册室内导航控件的点击回调函数
qq.maps.event.addListener(indoorNavControl, 'navclick', function(event) {
    // 判断是否点击了导航按钮
    if (event.control === indoorNavControl.getNavButton()) {
        var request = {
            from: startPoint,
            to: endPoint,
            mode: qq.maps.DirectionMode.INDOOR
        };

        // 发起导航请求
        service.route(request, function(result) {
            var path = result.detail.path;

            // 清除之前的导航路径
            indoorMap.clearPath();

            // 在地图上绘制导航路径
            indoorMap.drawPath(path);
        });
    }
});

Through the above code, when the user clicks the navigation button on the navigation control, an indoor navigation request will be initiated and the navigation path will be drawn on the map.

6. Summary

This article introduces how to use JavaScript and Tencent Map API to implement the map indoor navigation function, and provides specific code examples. With these code examples, you can easily add indoor navigation functionality to your website or app to improve the user experience. Hope this article is helpful to you!

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