镜头轨迹追踪

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          <!DOCTYPE html>
<html lang="en">

<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title> 北京某路线轨迹图 </title>
  <style>
    html,
    body,
    #map {
      width: 100%;
      height: 100%;
      margin: 0;
      padding: 0;
    }

    .demo-title {
      position: absolute;
      top: 50px;
      left: 50px;
      z-index: 1;
    }

    h1 {
      margin: 0;
      color: rgba(255, 255, 255, 0.75);
    }

    h3 {
      font-weight: normal;
      margin-top: 5px;
      color: rgba(255, 255, 255, 0.75);
    }

    .start-btn {
      position: absolute;
      bottom: 20px;
      right: 20px;
      padding: 0 18px;
      height: 30px;
      background-color: #1A66FF;
      border-radius: 5px;
      z-index: 1;
      cursor: pointer;
    }

    .start-btn>a {
      color: #fff;
      display: block;
      height: 100%;
      line-height: 30px;
      text-align: center;
      font-size: 14px;
    }

    .amap-ani {
      width: 44px;
      height: 52px;
      background: url('http://a.amap.com/Loca/static/loca-v2/demos/images/track_marker.png');
      background-size: 44px 52px;
    }
  </style>
</head>

<body>
  <div class="demo-title">
    <h1>镜头--北京某地区导航路径追踪</h1>
    <h3>使用轨迹追踪能力追踪导航路径</h3>
  </div>
  <div class="start-btn">
    <a>开始镜头追踪</a>
  </div>
  <div id="map"></div>
  <script
    src="http://webapi.amap.com/maps?v=2.1Beta&key=您申请的key值&plugin=AMap.Scale,AMap.ToolBar"></script>
  <script src="http://webapi.amap.com/loca?v=2.0.0&key=您申请的key值"></script>

  <script>
    window.movingDraw = true;
    var map = new AMap.Map('map', {
      terrain: true,
      viewMode: '3D',
      zoom: 13.5,
      center: [102.620455, 30.973672],
      pitch: 45,
      rotation: -90,
      showLabel: true,
      mapStyle: 'amap://styles/509934ebf66e54cbfe10ccae0056c462',
      showBuildingBlock: false,
      dragEnable: false,
      zoomEnable: false,
    });

    var loca = window.loca = new Loca.Container({
      map,
    });
    var path = [
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    // 轨迹
    var marker = new AMap.Marker({
      position: [102.834562, 30.994623],
      content:
        '<div class="amap-ani"></div>',
      anchor: 'bottom-center',
      map: map,
    })
    var polyline = new AMap.Polyline({
      path: [[102.620456, 30.973672], [102.620456, 30.973672]],
      isOutline: false,
      strokeColor: '#00E98F',
      strokeOpacity: 1,
      strokeWeight: 16,
      strokeStyle: 'solid',
      lineJoin: 'round',
      lineCap: 'round',
      zIndex: 500,
      map: map,
    });
    var finished = false;
    function run() {
      if (!finished) {
        var center = map.getCenter().toArray();
        var lastPath = polyline.getPath();
        lastPath.push(center);
        if (lastPath.length === 1) {
          lastPath.push(center);
        }
        polyline.setPath(lastPath);
        marker.setPosition(center);
      }
      requestAnimationFrame(run);
    }
    run();

    loca.animate.start();
    document.querySelector('.start-btn').addEventListener('click', function () {
      finished = false;
      polyline.setPath([[102.620456, 30.973672], [102.620456, 30.973672]]);
      loca.viewControl.addTrackAnimate({
        path: path, // 镜头轨迹，二维数组，支持海拔
        duration: 120000, // 时长
        timing: [[0, 0.3], [1, 0.7]], // 速率控制器
        rotationSpeed: 10, // 每秒旋转多少度
      }, function () {
        finished = true;
        console.log('完成');
      });
    });
  </script>
</body>

</html>
        
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