【Cesium for Supermap】S3MTiles图层box裁剪

效果图：

代码：

        let viewer = new Cesium.Viewer('cesiumContainer');// 添加SuperMap iServer发布的S3M缓存服务let promise = viewer.scene.addS3MTilesLayerByScp("http://www.supermapol.com/realspace/services/3D-BIMbuilding/rest/realspace/datas/BIMbuilding/config",{name: "layerName"});// 加载完成执行回调，定位到该图层promise.then(function (layer) {let ceterCartesianPosition = layer._position;let boundingSphere = new Cesium.BoundingSphere(ceterCartesianPosition, 200);let camera = viewer.scene.camera;camera.flyToBoundingSphere(boundingSphere);// 用于裁剪的盒子（S3MTiles图层和盒子重合部分会被裁剪调）let position = Cesium.Cartesian3.fromDegrees(116.47232967469, 39.9149481801, 17);let heading = Cesium.Math.toRadians(10);let hpr = new Cesium.HeadingPitchRoll(heading, 0, 0);let orientation = Cesium.Transforms.headingPitchRollQuaternion(position, hpr);viewer.entities.add(new Cesium.Entity({// 此点在box体的中心position: position,// 转动盒子方向（heading，pitch，roll）orientation: orientation,box: {dimensions: new Cesium.Cartesian3(50, 50, 10),material: Cesium.Color.fromAlpha(Cesium.Color.BLUE, 0.1),outline: true,outlineColor: Cesium.Color.AQUA,}}));// 裁剪参数指定裁剪模式。 裁剪模式包括以下几类：// clip_behind_any_plane：裁剪掉位于任何裁剪面后面的部分。// clip_behind_all_plane：裁剪掉位于所有裁剪面后面的部分。// only_keep_line：只保留裁剪线，裁剪掉其他部分。let clipMode = 'clip_behind_all_plane';let boxOption = {dimensions: new Cesium.Cartesian3(50, 50, 10),position: position,clipMode: clipMode,heading: heading};layer.setCustomClipBox(boxOption);})