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版本：9.1.1

三维场景曝光设置

设置三维场景中模型曝光程度。

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<!DOCTYPE html>
<html>

<head>
    <meta charset="utf-8"/>
    <title>三维场景曝光设置</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;
        }
    </style>
    <script src="https://delivery.mapmost.com/cdn/sdk/webgl/v9.1.1/mapmost-webgl-min.js"></script>
</head>

<body>
<div id="map"></div>
<div class="btn-group">
    <input type="number" value="0.5"/>
    <button onClick="setExposure()">设置曝光值</button>
</div>
<script>
    let map = new mapmost.Map({
        container: 'map',  
        style: "<your style url>", 
        center: [120.74603465203592, 31.30605899929158], 
        zoom: 16.810035105070947, 
        pitch: 59.48725112156901, 
        bearing: -54.10626584095007, 
        userId: '***', // 授权码
        env3D: {
            defaultLights: false,
            exposure: 1,
            envMap: '../example_data/hdr/WhiteBG_Ref_1K.hdr'
        }
    });

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

        let models_obj = ["../example_data/Olympic.glb"].map(item => ({
            type: 'glb',
            url: item
        }));

        let options = {
            id: 'model_id',
            type: 'model',
            models: models_obj,
            center: [120.74603465203592, 31.30605899929158, 6.0],
            callback: function (group, layer) {
            }
        };
        map.addLayer(options);

    })

    function setExposure() {
        if (map){
            let exposure = Number(document.querySelector('input').value)
            map.setExposure(exposure); // 修改场景曝光值
        }
    }
</script>
</body>

</html>