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### C.2.20 Changes for hierarchical objects

Meshes and lights can now properly be used as hierarchical objects with the same API. Here is how it works: meshes and lights implement the new `iSceneNode` interface. You can do `QuerySceneNode()` to get the scene object from the mesh, light, or camera without having to do `scfQueryInterface<>`. To make some object a child of another you simply do:

    object_child->QuerySceneNode ()->SetParent (
    	    	  object_parent->QuerySceneNode ());

To remove some object from a parent you do:

    object_child->QuerySceneNode ()->SetParent (0);

You can get the children by calling `iSceneNode->GetChildren()`.

The following methods have been removed:

- `iMeshWrapper->GetChildren()`
- `iMeshWrapper->GetParentContainer()`
- `iMeshWrapper->SetParentContainer()`
- `iMovable->GetParent()`
- `iMovable->SetParent()`

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