maptalks - wireframe着色器

wireframe着色器
index.html
<!DOCTYPE html>
<html>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <title>gltf模型 - wireframe着色器</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/maptalks/dist/maptalks.css">
  <script type="text/javascript" src="https://cdn.jsdelivr.net/npm/maptalks/dist/maptalks.min.js"></script>
  <script type="text/javascript" src="/gltf-examples/lib/maptalksgl.js"></script>
  <script type="text/javascript" src="/gltf-examples/lib/maptalks.gltf.js"></script>
  <body>
    <div id="map" class="container"></div>

    <script>
      var map = new maptalks.Map('map', {
        center: [-0.113049,51.498568],
        zoom: 14,
        pitch: 75,
        baseLayer: new maptalks.TileLayer('base', {
          urlTemplate: 'https://{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 url = '../../../../resource/gltf/cube-animation/cube.gltf';
      var symbol = {
        url: url,
        shader: 'wireframe',
        animation: true,
        loop: true,
        rotation: [90, 0, 0],
        uniforms: {
          stroke: [1.0, 0, 0, 1.0]
        }
      };

      var gltflayer = new maptalks.GLTFLayer('gltf').addTo(map);
      var position = map.getCenter();
      var gltfmarker = new maptalks.GLTFMarker(position, {
        symbol: symbol
      }).addTo(gltflayer);


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