[x3d-public] X3D Scripting for X3DOM w/o reading standard

[John Carlson]

> On Dec 3, 2021, at 1:53 PM, Joseph D Williams <joedwil at earthlink.net> wrote:
> 
> 
> 2.  What are the stumbling blocks to getting script fields into the event model?
>  
> Hi John,
> Scripts are completely involved in the x3d sai event model. A script must receive an event to begin execution and then it is like an ’external’ in that when the script begins it essentially acts like a beginUpdate and when it completes it essentially gets an endUpdate and all outputs are sent with the same time stamp as kicked off the script. Think of it as script is like any other node that can receive and send events. Only exception is, I think, that a script directOut does not initiate a new cascade

Part of the thing to do is try script fields in X3DOM and see if they work at all, and if they don’t, try to do a minimal amount of debugging to see what might be done.
I do not recall if Roy’s work on this is available still or not.

>  
> 3.  If scripts are transformed, how?
>  
> If it is ECMAScript then what do you do? What can be done? Break it down into json like any other node? For some reason I hope not.
>  

Well, one could potentially replace field access with a node attribute util get or set method.   But this can get really tricky, if not impossible to do in all cases.   It would be better to implement script field routes, if possible. See above.  If one could get script field routes into the HTML standard, much, much better…
> Joe
>  
>  
> From: John Carlson
> Sent: Tuesday, November 30, 2021 11:40 AM
> To: X3D Graphics public mailing list
> Subject: [x3d-public] X3D Scripting for X3DOM w/o reading standard
>  
> Information needed:
>  
>  
> 1.   Do scripts in proto bodies get copied?
>  
> 2.  What are the stumbling blocks to getting script fields into the event model?
>  
> 3.  If scripts are transformed, how?
>  
> 4.  What is the new event model for X3D4?
>  
> John
>  
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