Polygon with altitude
index.html
<!DOCTYPE html>
<html>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <title>3D - Polygon with altitude</title>
  <style type="text/css">
    html,body{margin:0px;height:100%;width:100%}
    .container{width:100%;height:100%}
  </style>
  <link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/[email protected]/dist/maptalks.css">
  <script type="text/javascript" src="https://cdn.jsdelivr.net/npm/[email protected]/dist/maptalks.min.js"></script>
  <body>

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

    <script>
      var map = new maptalks.Map('map', {
        center: [-0.113049,51.498568],
        zoom: 14,
        pitch : 60,
        baseLayer: new maptalks.TileLayer('base', {
          urlTemplate: 'http://{s}.basemaps.cartocdn.com/light_all/{z}/{x}/{y}.png',
          subdomains: ['a','b','c','d'],
          attribution: '&copy; <a href="http://osm.org">OpenStreetMap</a> contributors, &copy; <a href="https://carto.com/">CARTO</a>'
        })
      });

      var center = map.getCenter();

      var rectangle = new maptalks.Rectangle(center.add(-0.018,0.012), 800, 700, {
        symbol: {
          lineColor: '#34495e',
          lineWidth: 2,
          polygonFill: '#34495e',
          polygonOpacity: 0.4
        },
        properties : {
          altitude : 100
        }
      });

      var circle = new maptalks.Circle(center.add(0.002,0.008), 500,{
        symbol: {
          lineColor: '#34495e',
          lineWidth: 2,
          polygonFill: '#1bbc9b',
          polygonOpacity: 0.4
        },
        properties : {
          altitude : 800
        }
      });
      var sector = new maptalks.Sector(center.add(-0.013,-0.001), 900, 240, 300, {
        symbol: {
          lineColor: '#34495e',
          lineWidth: 2,
          polygonFill: 'rgb(135,196,240)',
          polygonOpacity: 0.4
        },
        properties : {
          altitude : 600
        }
      });

      var ellipse = new maptalks.Ellipse(center.add(0.003,-0.005), 1000, 600, {
        symbol: {
          lineColor: '#34495e',
          lineWidth: 2,
          polygonFill: 'rgb(216,115,149)',
          polygonOpacity: 0.4
        },
        properties : {
          altitude : 400
        }
      });

      var layer = new maptalks.VectorLayer('vector', { enableAltitude : true })
        .addGeometry([rectangle, circle, sector, ellipse])
        .addTo(map);

      // draw shadows
      var shadowSymbol = {
        lineColor: '#bbb',
        lineDasharray : [10, 5, 5],
        lineWidth: 2,
        polygonFill: '#bbb',
        polygonOpacity: 0.4
      };
      var shadows = [];
      layer.forEach(function (geo) {
        shadows.push(geo.copy().setSymbol(shadowSymbol));
      });
      new maptalks.VectorLayer('shadows', shadows).addTo(map).bringToBack();

    </script>
  </body>
</html>
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