版本：9.0.0

地下三维模型渲染设置

适用于加载显示地下三维模型，开启该参数后，不透明材质模型将先于半透明地表渲染，从而达到正确的三维空间效果，但该模式下渲染性能将受到一定影响。

<!DOCTYPE html>
<html>

<head>
    <meta charset="utf-8" />
    <title>地下三维模型渲染设置</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%;
        }

        .btn-group {
            position: absolute;
            top: 20px;
            left: 20px;
            color: #000000;
            font-weight: bold;
        }
    </style>
    <script src="https://delivery.mapmost.com/cdn/sdk/webgl/v9.0.0/mapmost-webgl-min.js"></script>
</head>

<body>
     <div id="btn" class="btn">
        <button onclick="setRenderPassSync(true)">开启渲染设置</button>
        <button onclick="setRenderPassSync(false)">关闭</button>
    </div>
    <div id="map"></div>
    <script>

        let modelLayer;
        let map = new mapmost.Map({
            container: 'map', 
            style: '<your style url>',
            center: [120.67287475351259, 31.320097198762696],
            zoom: 16.035248396661892, 
            pitch: 62.48725112156906, 
            bearing: -66.90626584095008, 
            userId: '***',
        });

        map.on('load', function () {
            let models_obj = ["./DFZM.glb"].map(item => ({
                type: 'glb',
                url: item
            }));

            let options = {
                id: 'model_id',
                type: 'model',
                models: models_obj,
                center: [120.67727020663829, 31.31997024841401, -20],
                callback: function (group, layer) {
                    modelLayer = layer;
                }
            };

            map.addLayer(options);
        })

        function setRenderPassSync(value) {
            modelLayer.setRenderPassSync(value);
        }

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