获取 DWFX 文件的未定义实例树

Question

我们试图获取 DWFX 文件的所有节点元素，但我们得到了 DWFX 文件的未定义实例树。我们使用以下代码来获取每个元素 ID。

// Try to get instance tree for DWFX file
var model = this.viewer.model;
var modelData = model.getData();
var it = modelData.instanceTree;  // get instance tree

We have used another way to get element node id for DWFX file. (In that case, we are getting only panel label id for DWFX file) But that logic is not working for all DWFX files.
// Try to get all ids for DWFX file
var model = this.viewer.model;
var modelData = model.getData();
var allIds = modelData.stringDbIds;  // get all ids 

Please us know If I am using wrong approach to get all elements for DWFX file.

Answer 1

您需要等待Autodesk.Viewing.OBJECT_TREE_CREATED_EVENT事件以确保实例树在加载的模型中可用：

viewer.addEventListener(Autodesk.Viewing.OBJECT_TREE_CREATED_EVENT, function () {
var model = this.viewer.model;
var modelData = model.getData();
var it = modelData.instanceTree;  
console.log(it)
})

在某些情况下，如果您打算访问组件的几何图形，则可能还需要等待Autodesk.Viewing.GEOMETRY_LOADED_EVENT事件。以下是可能相关的文章：异步查看器事件通知