[x3d-public] loading DOM VRML Script. Cobweb enhancement?

[Andreas Plesch]

Hi John,

X3dom is designed to work with the XML encoding or a dom. So for x3dom it
would be necessary to first create a DOM from the json. It will be
difficult to get around that.

Cobweb has parsers which parse XML or vrml into a scene graph. So it should
be possible to make a parser for json, probably following what the XML
parser does. But the easier path would be also to create a DOM from the
json first.

How do you envision you or others would use json encoded x3d content to add
value to a project ? Easier manipulation as a js object ? Easier
programmatic content creation ? As an exchange/transmission format, a bit
similar to gltf ?


http://www.web3d.org/x3d/content/examples/Basic/ScriptConformance/

has good examples to test scripting. For example,

http://www.web3d.org/x3d/content/examples/Basic/ScriptConformance/TouchSensorIsOverEventECMAScriptIndex.html

http://www.web3d.org/x3d/content/examples/Basic/ScriptConformance/TouchSensorIsOverEventECMAScript.json

I may give this example a try with the json loader and cobweb.

-Andreas

On Dec 4, 2016 1:49 AM, "John Carlson" <yottzumm at gmail.com> wrote:

> Perhaps it's time for me to dig into Cobweb and X3DOM to see how they can
> be extended to support JSON?  If it's through DOM, which is fine by me, I
> would have to look and see how the various encodings are loaded after DOM
> is loaded.
>
> On Dec 4, 2016 1:40 AM, "John Carlson" <yottzumm at gmail.com> wrote:
>
>> Again, the X3D JSON Loader is a proof of concept patch until we get full
>> JSON support in Cobweb and X3DOM, if desired.
>>
>> On Dec 4, 2016 1:24 AM, "John Carlson" <yottzumm at gmail.com> wrote:
>>
>>> Because I may not have the full x3d examples downloaded.   And I do want
>>> to test to see if JSON inclusion works.
>>>
>>> On Dec 2, 2016 3:04 PM, "Andreas Plesch" <andreasplesch at gmail.com>
>>> wrote:
>>>
>>>> Hi John,
>>>>
>>>> I tried a bit to load gears.json with X3DJSONLD:
>>>>
>>>> https://raw.githubusercontent.com/andreasplesch/X3DJSONLD/ma
>>>> ster/AP_minimal_JSLD.html
>>>>
>>>> But even before any script parsing/loading, there is a problem with the
>>>> ExternProtoDeclare node in gears.json. It has a url field to Rotor.x3d
>>>> which is replaced by the json loader with Rotor.json before being handed
>>>> off to cobweb with importDocument(). Cobweb does not know what to do with
>>>> the Rotor.json file and gives up.
>>>>
>>>> Why modify the url field value ? If the scene author wants to use a
>>>> .json encoded scene, she will put it in  the url field just like a .wrl
>>>> encoded scene.
>>>>
>>>> On another note, I agree that eval() cannot be avoided if script should
>>>> be supported. cobweb itself also uses eval() (after some setup and
>>>> massaging) to run the x3d script.
>>>>
>>>> type="application/x-vrmlscript" is necessary because without it the
>>>> web browser will try to run the script "as is" as soon as it gets appended
>>>> to the page DOM. When cobweb gets a chance to check for the type attribute,
>>>> it is already too late. So it cannot use the attribute to prevent it from
>>>> running. It can only not reject it which is what it does.
>>>>
>>>> -Andreas
>>>>
>>>>
>>>> On Thu, Dec 1, 2016 at 1:02 AM, <yottzumm at gmail.com> wrote:
>>>>
>>>>> It appears that Cobweb is fouled up with DOM loading of scripts, even
>>>>> with the additional name value pair.  See gears.x3d/gears.json and load DOM
>>>>> through importDocument.  And independent test would help.  I am not sure
>>>>> which of my X3DCanvases gets loaded first and I am using absolute indexing,
>>>>> so it could be the XML loaded one that is failing.  Basically, we need a
>>>>> good way to load scripts coming in through JSON I think, and the only real
>>>>> way I know how to do it is eval or cobweb with JSON to XML conversion and
>>>>> VRMLscript.  If Cobweb could use the VRMLscript from JSON or DOM, that
>>>>> might be ideal.
>>>>>
>>>>>
>>>>>
>>>>> This is with cobweb 2.4.
>>>>>
>>>>>
>>>>>
>>>>> John
>>>>>
>>>>>
>>>>>
>>>>> Sent from Mail <https://go.microsoft.com/fwlink/?LinkId=550986> for
>>>>> Windows 10
>>>>>
>>>>>
>>>>>
>>>>> *From: *yottzumm at gmail.com
>>>>> *Sent: *Thursday, December 1, 2016 12:32 AM
>>>>> *To: *Andreas Plesch <andreasplesch at gmail.com>; Don Brutzman
>>>>> <brutzman at nps.edu>; Roy Walmsley <roy.walmsley at ntlworld.com>
>>>>> *Subject: *FW: loading X3D DOM. Latest Cobweb techniques?
>>>>>
>>>>>
>>>>>
>>>>> Would it be possible to get a name/value of
>>>>>
>>>>>
>>>>>
>>>>> "@type" : "application/x-vrmlscript"
>>>>>
>>>>>
>>>>>
>>>>> On the Script tag in X3D JSON?  I will do some testing here first to
>>>>> see if it will help.
>>>>>
>>>>>
>>>>>
>>>>> John
>>>>>
>>>>>
>>>>>
>>>>> *From: *yottzumm at gmail.com
>>>>> *Sent: *Thursday, December 1, 2016 12:24 AM
>>>>> *To: *Andreas Plesch <andreasplesch at gmail.com>
>>>>> *Subject: *RE: loading X3D DOM. Latest Cobweb techniques?
>>>>>
>>>>>
>>>>>
>>>>> One thing I noticed once I got both DOM and XML views loaded, was that
>>>>> I think the DOM VRML script tag was disabled, but the XML one worked.  Was
>>>>> there some attribute to add to the Script tag to make it work?  Can I add
>>>>> it in both XML and DOM?  Thanks, John  I will start email search.
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>
>>>>
>>>>
>>>> --
>>>> Andreas Plesch
>>>> 39 Barbara Rd.
>>>> Waltham, MA 02453
>>>>
>>>
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