//获取顶级模型
let topModel = scene.getTopModel();
//获取子件模型
let childrenList = topModel.getChildren();
//获取装配结构
let jsonAssembly = new SView.JsonAssembly(topModel,true,true);
//转成json
let jsonStr = JSON.stringify(jsonAssembly);
根据装配路径获取模型
let path = 'M3D|MAIN|PATH|0|5';
let model = shapes.getModelBySVLPath('M3D|MAIN|PATH|0|5');