Gaode api, 3D map, marker event/label, non-Dom event, line, map event, administrative area layer

• load map, style theme, 3D

map = new AMap.Map('map-container', {
    
    
        zoom: 18,
        center: [116.39, 39.9],
        showLabel: false, //隐藏文字标注
        mapStyle: 'amap://styles/whitesmoke', //样式主题
        viewMode: '3D',//...
        pitch: 40,//视角
      })

map.getCenter() // 获取中心点
map.getZoom() // 获取缩放级别

• Marker creation, adding annotations, adding events, non-dom events

const marker = new AMap.Marker({
    
    
   position: [location.lng, location.lat],
   content: '<div class="custom-icon"></div>',
 })
 marker.on('mouseover', () => {
    
    ))//鼠标移入
 	.on('mouseout', () => {
    
    ))//鼠标移出
 	.on('click', () => {
    
    ))//点击
 //显示标注
 marker.setLabel({
    
    
        offset: new AMap.Pixel(10, 10),
        content: `<div class='info'>${
      
      location.address}</div>`,
        direction: 'right',
      })
//隐藏标注
marker.setLabel({
    
    
   content: null,
   direction: null,
 })
 //触发非dom事件
 AMap.Event.trigger(marker, 'mouseover')

• Scale and change the center point, no animation is displayed

map.setZoomAndCenter(18, currentMarker.getPosition(), true)

• draw a line

var polyline = new AMap.Polyline({
    
     
   path: [[v.lng, v.lat],[v1.lng, v1.lat]], 
   strokeColor: '#FF0000', // 线条颜色 
   strokeWeight: 1, // 线条宽度 
   strokeOpacity: 0.9 // 线条透明度 
 })
 map.add(polyline)

• map, add events

map.on('complete', () => {
    
    
        console.log('map complete')
        emit('onMapInit')
      }).on('click', () => {
    
    //普通点击
      
      }).on('dragend', () => {
    
    //拖动

      }).on('touchstart', () => {
    
    //移动端事件

      })

• 3D administrative area layers AmbientLight, DirectionLight, Object3DLayer
  This is the rendering, based on which you can add layers, draw trajectories and other coverings (based on canvas)
  Official Tips: Starting from JS API v1.4.5, it is available in 3D view mode The ability to create and add three-dimensional graphics, these three-dimensional graphics include grid (Mesh) type, line type, point type, etc.
  
  Vue-related loading map and Object3D parts

	const loadMap = () => {
    
    
      console.log('initMap')
      const AMap = window.AMap
      console.log(window.AMap)
      map.value = new AMap.Map('map', {
    
    
        resizeEnable: true,
        mapStyle: 'amap://styles/darkblue',
        viewMode: '3D',
        pitch: 40,
        zoom: 12,
        showLabel: false
        // labelzIndex: -1,
      })
      map.value.on('complete', () => {
    
    
        console.log('map complete')
        emit('onMapInit')
        ambientLight()
      })
    }
    const ambientLight = () => {
    
    
      const AMap = window.AMap
      const _map = map.value
      _map.AmbientLight = new AMap.Lights.AmbientLight([1, 1, 1], 0.5)
      _map.DirectionLight = new AMap.Lights.DirectionLight([0, 0, 1], [1, 1, 1], 1)
      var object3Dlayer = new AMap.Object3DLayer()
      _map.add(object3Dlayer)

      new AMap.DistrictSearch({
    
    
        subdistrict: 0, // 返回下一级行政区
        extensions: 'all', // 返回行政区边界坐标组等具体信息
        level: 'city' // 查询行政级别为 市
      }).search('北京市', function (status, result) {
    
    
        var bounds = result.districtList[0].boundaries
        var height = 1000
        var color = '#0088ff4f'
        var prism = new AMap.Object3D.Prism({
    
    
          path: bounds,
          height: height,
          color: color
        })

        prism.transparent = true
        object3Dlayer.add(prism)

        var text = new AMap.Text({
    
    
          text: result.districtList[0].name + '</br>(' + result.districtList[0].adcode + ')',
          verticalAlign: 'bottom',
          position: [116.528261, 39.934313],
          height: 5000,
          style: {
    
    
            'background-color': 'transparent',
            '-webkit-text-stroke': 'red',
            '-webkit-text-stroke-width': '0.5px',
            'text-align': 'center',
            border: 'none',
            color: 'white',
            'font-size': '24px',
            'font-weight': 600
          }
        })

        text.setMap(_map)
      })
    }

• The following is the official demo, and then add some random trajectory layer rendering

<!doctype html>
<html>

<head>
  <meta charset="utf-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="initial-scale=1.0, user-scalable=no, width=device-width">
  <title>英文、中英文地图</title>
  <link rel="stylesheet" href="https://a.amap.com/jsapi_demos/static/demo-center/css/demo-center.css" />
  <style>
    html,
    body,
    #container {
    
    
      width: 100%;
      height: 100%;
    }

    #map-styles .input-item {
    
    
      height: 2rem;
    }

    #map-styles .input-item span{
    
    
      display: inline-block;
      width: 4rem;
    }

    #map-styles .input-item .input-text {
    
    
      color: #0288d1;
      margin-left: 1rem;
      margin-right: 0rem;
      width: 6rem;
    }
  </style>
</head>

<body>
  <div id="container"></div>
  <script src="https://webapi.amap.com/maps?v=1.4.10&amp;key=xxx&amp;plugin=Map3D,AMap.DistrictSearch"></script>
  <!--script crossorigin="anonymous" id="amap_plus_js" src="https://webapi.amap.com/maps/modules?v=1.4.22&amp;key=bb01f498549fe82c328c9dc1c2280d6c&amp;vrs=1671592305593&amp;m=mouse,vectorlayer,overlay,wgl,vectorlayer,wgl,AMap.CustomLayer,rbush,Map3D,AMap.DistrictSearch,sync" type="text/javascript"></script-->
  <script>
    //初始化地图
    var map = new AMap.Map('container', {
    
    
      resizeEnable: true, //是否监控地图容器尺寸变化
      mapStyle: "amap://styles/darkblue",
      viewMode:'3D',
      pitch: 70,
      zoom: 12,
      labelzIndex: -1,
    });
    //隐藏地图上的所有地名
    //map.setFeatures(['bg', 'point', 'building']);

    //绑定radio点击事件
    var radios = document.querySelectorAll("#map-styles input");
    radios.forEach(function(ratio) {
    
    
      ratio.onclick = setMapStyle;
    });

    function setMapStyle() {
    
    
      var styleName = "amap://styles/" + this.value;
      map.setMapStyle(styleName);
    }
        // 设置光照
    map.AmbientLight = new AMap.Lights.AmbientLight([1, 1, 1], 0.5);
    map.DirectionLight = new AMap.Lights.DirectionLight([0, 0, 1], [1, 1, 1], 1);

    var object3Dlayer = new AMap.Object3DLayer();
    map.add(object3Dlayer);
    
    new AMap.DistrictSearch({
    
    
        subdistrict: 0,   //返回下一级行政区
        extensions: 'all',  //返回行政区边界坐标组等具体信息
        level: 'city'  //查询行政级别为 市
    }).search('朝阳区', function (status, result) {
    
    
		console.log(status)
        var bounds = result.districtList[0].boundaries;
        var height = 1000;
        var color = '#0088ff4f'; // rgba
        var prism = new AMap.Object3D.Prism({
    
    
            path: bounds,
            height: height,
            color: color
        });

        prism.transparent = true;
        object3Dlayer.add(prism);

        var text = new AMap.Text({
    
    
            text: result.districtList[0].name + '</br>(' + result.districtList[0].adcode + ')',
            verticalAlign: 'bottom',
            position: [116.528261, 39.934313],
            height: 5000,
            style: {
    
    
                'background-color': 'transparent',
                '-webkit-text-stroke': 'red',
                '-webkit-text-stroke-width': '0.5px',
                'text-align': 'center',
                'border': 'none',
                'color': 'white',
                'font-size': '24px',
                'font-weight': 600
            }
        });

        text.setMap(map);
    });
    function getData(callback){
    
    
	    AMap.plugin('AMap.DistrictSearch', function() {
    
    
    		var search = new AMap.DistrictSearch();
    		search.search('朝阳区', function(status, data) {
    
    
    			if (status === 'complete') {
    
    
    			    var positions = []
    				var provinces = data['districtList'][0]['districtList']
    				for (var i = 0; i < provinces.length; i += 1) {
    
    
    				    positions.push({
    
    
    				        center: provinces[i].center,
    				        radius:Math.max(2, Math.floor(Math.random() * 10))
    				    })
    				}
    				callback(positions)
    			}
    		});
	    });
	}
//绘制多段的轨迹
	function addLayerV2() {
    
    
		AMap.plugin('AMap.CustomLayer', function() {
    
    
			var canvas = document.createElement('canvas');
			var customLayer = new AMap.CustomLayer(canvas, {
    
    
				zooms: [10, 18],
				alwaysRender:true,//缩放过程中是否重绘，复杂绘制建议设为false
				zIndex: 120 //显示高度
			});
			var segments = [];
			var positions = [];
			var lat_min = 39.86, lat_max = 40.05, lng_min = 116.38, lng_max = 116.55;
			for (var i = 0; i < 5; i++) {
    
    
				var positions = [];
				var count = Math.floor(Math.random() * 10) + 10;
				for (var j = 0; j < count; j++) {
    
    
					var lat = Math.random() * (lat_max - lat_min) + lat_min;
					var lng = Math.random() * (lng_max - lng_min) + lng_min;
					positions.push([lng, lat]);
				}
				segments.push(positions);
			}
			var onRender = function(){
    
    
				var retina = AMap.Browser.retina;
				var size = map.getSize();//resize
				var width = size.width;
				var height = size.height;
				canvas.style.width = width+'px'
				canvas.style.height = height+'px'
				if(retina){
    
    //高清适配
					width*=2;
					height*=2;
				}
				canvas.width = width;
				canvas.height= height;//清除画布
	            var ctx = canvas.getContext("2d");
				for (var i = 0; i < segments.length; i++) {
    
    
					var positions = segments[i];
					ctx.strokeStyle = "#" + ((1 << 24) * Math.random() | 0).toString(16);
					ctx.lineWidth = 5;
					ctx.beginPath();
					for (var j = 0; j < positions.length; j++) {
    
    
						var pixel = map.lngLatToContainer(positions[j]);
						if (j == 0) {
    
    
							ctx.moveTo(pixel.x, pixel.y);
						} else {
    
    
							ctx.lineTo(pixel.x, pixel.y);
						}
					}
					ctx.stroke();
				}
			};
			customLayer.render = onRender;
			customLayer.setMap(map);
		});
	}
	getData(addLayerV2);
  </script>
</body>

</html>