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版本：9.4.1

模型高亮选择

通过移动鼠标高亮三维模型。

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<!DOCTYPE html>
<html>
<head>
    <meta charset="utf-8"/>
    <title>模型高亮选择</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/v9.4.1/mapmost-webgl-min.js"></script>
</head>
<body>
<div id="map"></div>
<script>
    let map = new mapmost.Map({
        container: 'map',  
        style: "<your style url>", 
        center: [120.69647280968667, 31.35628749488366],
        zoom: 18,
        pitch: 60,
        bearing: -7.200086687507338,
        userId: '***', // 授权码
        env3D: {
            exposure: 2.0,
            envMap: '../../../../static/example_data/hdr/WhiteBG_Ref_1K.hdr'
        }
    });

    let THREE = mapmost.THREE;
    map.on('load', function () {
      
        let modelLayer,selectedObj;

        // 添加模型
        let models_obj = [{
            type: 'glb',
            url: "../example_data/house.glb"
        }];

        const center = [120.69647280968667, 31.35628749488366];

        let options = {
            id: 'model_id',
            type: 'model',
            callback: function (group, layer) {
                modelLayer = layer;

                // 添加 house
                modelLayer.addModel(models_obj, center);
            }
        };
        map.addLayer(options);


        // 添加鼠标 hover 事件
        map.on('mousemove', function (e) {
            if (modelLayer) {
                selectObj(e.point)
            }
        });

        // 根据屏幕鼠标位置选择模型
        function selectObj(point) {

            let intersect = modelLayer.selectModel(point)[0];

            if (intersect) {
                let nearestObject = intersect.object;

                // 选中的不是之前选中的层
                if (!(selectedObj === nearestObject.parent)) {

                    _remove();

                    selectedObj = nearestObject.parent;

                    selectedObj.traverse(function (child) {
                        if (child instanceof THREE.Mesh) {

                            // 将原有材质存储到自定义属性
                            child.baseMaterial = child.material;

                            // 复制原有的材质并修改颜色
                            child.material = child.material.clone();
                            child.material.color = new THREE.Color(0xffff00);
                        }
                    });
                }

            } else {
                _remove();
            }
        }

        // 还原
        function _remove() {
            if (selectedObj) {
                selectedObj.traverse(function (child) {
                    child.material = child.baseMaterial;
                });
                selectedObj = undefined;
            }
        }
    })
</script>
</body>
</html>