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版本：9.2.0

加载带几何压缩的3D模型

加载glb、gltf格式三维几何压缩模型，用户可对模型进行一些列的交互式操作。

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<!DOCTYPE html>
<html>
<head>
    <meta charset="utf-8"/>
    <title>addModel</title>
    <meta name="viewport" content="initial-scale=1,maximum-scale=1,user-scalable=no"/>
    <style>
        body {
            margin: 0;
            padding: 0;
        }

        #map {
            position: absolute;
            top: 0;
            bottom: 0;
            width: 100%;
        }
    </style>
    <script src="https://delivery.mapmost.com/cdn/sdk/webgl/v9.2.0/mapmost-webgl-min.js"></script>
</head>
<body>
<div id="map"></div>
<script>
    let map = new mapmost.Map({
        container: 'map',  
        style: "<your style url>", 
        center: [120.67400351817594, 31.321374251251726], 
        zoom: 15.310035105070947, 
        pitch: 59.48725112156901, 
        bearing: -54.10626584095007, 
        userId: '***', // 授权码
        env3D: {
            defaultLight: true,
            exposure:1.7,
            envMap: '../example_data/hdr/venice_sunset_2k_fixed5_1.hdr'
        }
    });

    map.on('load', function () {

        let models_obj = ["dracoModel","dracoModel1"].map(item => ({
            type: 'glb',
            url: './'+item+'.glb',
            dracoUrl:"https://delivery.mapmost.com/cdn/sdk/lib/draco/", //支持加载几何压缩模型,内网离线需要下载以下资源到存放本地新建的draco文件夹并发布此文件夹，使用时需要传入draco文件夹绝对路径
            // https://delivery.mapmost.com/cdn/sdk/lib/draco/draco_decoder.wasm
            // https://delivery.mapmost.com/cdn/sdk/lib/draco/draco_wasm_wrapper.js
            // https://delivery.mapmost.com/cdn/sdk/lib/draco/draco_decoder.js
        }));

        let options = {
            id: 'model_id',
            type: 'model',
            models: models_obj,
            center: [120.67727020663829, 31.31997024841401,40],
            // callback: function (group, layer) {
            //     layer.addModel(models_obj,[120.67727020663829, 31.31997024841401]); 
            // }
        };
        map.addLayer(options);
    })
</script>
</body>
</html>