版本：9.4.0
模型动画

加载三维模型，实现动画效果。
<!DOCTYPE html>
<html>
<head>
    <meta charset="utf-8"/>
    <title>模型动画</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: white;
        }
    </style>
    <script src="https://delivery.mapmost.com/cdn/sdk/webgl/v9.4.0/mapmost-webgl-min.js"></script>
</head>
<body>
<div id="map"></div>
<div class="btn-group">
    <button onClick="startA()">开始动画</button>
    <button onClick="stopA()">结束动画</button>
</div>
<script>
        let map = new mapmost.Map({
            container: 'map',  
            style: "<your style url>", 
            center: [120.67927020663829, 31.31997024841401], 
            zoom: 17.5, 
            pitch: 60, 
            userId: '***', // 授权码
            env3D: {
                envMap: '../../../../static/example_data/hdr/venice_sunset_2k_fixed5_1.hdr'
            }
        });

        let modelGroup
        map.on('load', function () {
           
            let models_obj = ["../example_data/TRAIN_4B.glb"].map(item => ({
                type: 'glb',
                url: item
            }));
    
    
            let options = {
                id: 'model_id',
                type: 'model',
                models: models_obj,
                center: [120.67727020663829, 31.31997024841401],
                callback: function (group, layer) {
                    modelGroup = group;
                    modelGroup.setRotation({x: 0, y: 0, z: 90})
                }
            };
            map.addLayer(options);
        })
    
        function startA() {
            let linePath = [[120.67727020663829, 31.31997024841401], [120.68327020663829, 31.31997024841401]]
            modelGroup.followPath({path: linePath, duration: 10000}, cb)
        }
    
        function stopA() {
            modelGroup.stop();
        }
    
        function cb() {
            console.log("动画执行完毕！")
        }
</script>
</body>
</html>