[x3d-public] [x3dom-users] inline access from dom

Leonard Daly web3d at realism.com
Sat Oct 1 20:54:41 PDT 2016


Andreas,

I am not sure if you are looking for comments, advice, discussion, or 
just posting a notice. I don't want to go off on a tangent here. I am 
rather familiar with how and almost why X3DOM does it.


Leonard Daly


> I am working on adding DOM access to inline scenes for my Cobweb DOM 
> bridge:
>
> https://andreasplesch.github.io/cobweb_dom/tests/inline_in_inline.xhtml
>
> The idea is to add the external inline scene DOMs to the main scene 
> DOM as children of the Inline elements. Once added, the mutation 
> observer picks up modifications of these children and does not need to 
> do anything other than it already does for the main scene.
>
> It works well although I do not know how web browsers deal with large 
> combined DOMs. Also, a small addition to Cobweb.js is currently needed.
>
> One effect is that one can use CSS selectors with querySelector to 
> drill down to specific elements in inline scenes, even through 
> hierarchies of inlined inlines. See example. This way the DEF names 
> can be used even if they are identical across scenes. X3D semantics 
> and functioning is not affected.
>
> X3dom uses a different approach of prefixes to id/DEF attributes to 
> enable access to elements in inlines. Not sure if x3dom could use 
> instead or in addition Selectors ? This would require adding the 
> Inline DOMs to the main DOM but perhaps this is already almost done ?
>
> So I am considering also adding the same option of a namespacename 
> prefix to element IDs but the effort would be really for 
> compatibility. Thinking about it, while possible probably not a 
> priority unless there is a compelling use case.
>
> X3D has EXPORT/IMPORT to deal with accessing nodes in inlines. I think 
> the SAI equivalent is roughly that all nodes are EXPORTed by default 
> and that in addition to a DEF name it becomes possible to address a 
> node by its path in the scene hierarchy. Perhaps something to consider 
> for the standard: X3D selectors.
>
> Andreas
>
>
>
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-- 
*Leonard Daly*
3D Systems Architect & Cloud Consultant
President, Daly Realism - /Creating the Future/
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