如何检索Forge Viewer objectTree? [英] How to Retrieve Forge Viewer objectTree?

问题描述

我的目标是通过根据我在revit中创建的线条向查看器添加新的几何形状来突出显示一个房间，就像在这里

My goal is to highlight a room by adding new geometry to the viewer based on lines I have created in revit like they do here Link

但是我不知道如何访问这些行ID. 我知道它们在revit(element_id)中是什么，但不知道如何将它们映射为dbid.

but i can not figure out how to access those lines ids. I know what they are in revit (element_id) but not how they are mapped as dbid.

遵循此我想访问扩展中的objectTree来查找，但是它总是以未定义的形式返回.

I want to access the objectTree in my extension to find out, but it always comes back as undefined.

var tree;
//old way - viewer is your viewer object - undefined
viewer.getObjectTree(function (objTree) {
 tree = objTree;
});

//2.5-未定义

  var instanceTree = viewer.model.getData().instanceTree;
  var rootId = this.rootId = instanceTree.getRootId();

//-未定义

  var objectTree = viewer.getObjectTree();

谁能告诉我它是否仍然适用于我，我正在使用API​​的v2进行rvt转换为svf和2.9的viewer3D.js

Can anyone tell me if its still works for them I am using the v2 of the API for the rvt conversion to svf and 2.9 of the viewer3D.js

请注意，如果我将其命名，则可以看到dbid列表

note I can see a list of dbid if I call this

var model = viewer.impl.model;
var data = model.getData();
var fragId2dbIdArray = data.fragments.fragId2dbId ;

但无法映射回Revit element_id

but have no way of mapping back to the Revit element_id

推荐答案

从2.9版开始，此功能仍然有效.这是我的控制台:

As of version 2.9 this is still working. Here's my console:

您可以尝试以下两种操作:

Here's a couple of things you can try:

1. viewer是否未定义?抓住viewer时您处在正确的范围内吗?
2. 必须先加载文档，然后才能获取实例树.加载文档后，将触发一个名为Autodesk.Viewing.GEOMETRY_LOADED_EVENT的事件，然后您就可以开始操作实例树了.

1. Is viewer undefined? Are you in the correct scope when grabbing the viewer?
2. The document have to be loaded before you can grab the instance tree. When the document is loaded, an event called Autodesk.Viewing.GEOMETRY_LOADED_EVENT will be fired, then you can start manipulating the instance tree.

只需执行以下操作:

viewer.addEventListener(Autodesk.Viewing.GEOMETRY_LOADED_EVENT, function () {
var instanceTree = viewer.model.getData().instanceTree;
});

有关更结构化的代码，请遵循本指南添加扩展名.

For more structured code, follow this guide to add an extension.

有一个更详细的博客文章在哪个事件上收听.不过，它仍然使用旧方法来获取实例树.

There's a more detailed blog post on which event to listen for. It's still using the old way to get instance tree, though.

这篇关于如何检索Forge Viewer objectTree?的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！