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

Sun Dec 4 12:42:56 PST 2016

Hi John,

I saw that you already tried createCDATASection but commented that perhaps
because it did not work for html. I reenabled createCDATASection here:

https://github.com/andreasplesch/X3DJSONLD/blob/master/X3DJSONLD.js#L235

and with that change the simple script example works (!) in an xhtml
document:

https://rawgit.com/andreasplesch/X3DJSONLD/master/AP_minimal_JSLD.xhtml

-Andreas

On Sun, Dec 4, 2016 at 3:31 PM, Andreas Plesch <andreasplesch at gmail.com>
wrote:

> Hi John,
>
> I looked at the http://www.web3d.org/x3d/content/examples/Basic/
> ScriptConformance/TouchSensorIsOverEventECMAScript.json example.
>
> The problem is that X3DJSONLD turns the script node into a DOM node with
> correct field node children but the script text is contained in raw text
> nodes:
>
> <field>
> <field>
> #text "<![CDATA["
> #text "ecmascript:function isOver(val) {     if (val == true)
> {         diffuseColor_changed = new SFColor(1,0,0);     }     else
> {         diffuseColor_changed = new SFColor(0,0,1);    }}"
> #text "]]>"
>
> The script text should be contained in the nodeValue/textContent of a
> CDATASection :
>
> <field>
> <field>
> CDATASection nodeValue=textContent="ecmascript:function isOver(val) {
> if (val == true)     {         diffuseColor_changed = new
> SFColor(1,0,0);     }     else     {         diffuseColor_changed = new
> SFColor(0,0,1);    }}"
>
> https://developer.mozilla.org/en-US/docs/Web/API/Document/
> createCDATASection
>
> However, createCDATASection only works with xhtml.
>
> I am sneaking a CDATASection into a html document using DOMParser in xml
> mode here:
>
> https://github.com/andreasplesch/cobweb_dom/blob/
> master/cobweb/cobweb_dom.js#L34
>
> I think DOMParser.parseFromString("<![CDATA[ scripttext using > and <
> ]]>", 'application/xml'); should return a document with a single
> cdatasection node which then can be appended to the script node.
>
> https://github.com/coderextreme/X3DJSONLD/blob/master/X3DJSONLD.js#L224
>
> looks like the function where an actual CDATASection node needs to be
> created instead of raw text nodes.
>
> Hope this helps,
>
> Andreas
>
> On Sun, Dec 4, 2016 at 1:42 PM, Andreas Plesch <andreasplesch at gmail.com>
> wrote:
>
>> 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/ScriptConfor
>> mance/TouchSensorIsOverEventECMAScriptIndex.html
>>
>> http://www.web3d.org/x3d/content/examples/Basic/ScriptConfor
>> mance/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
>>>>>>
>>>>>
>
>
> --
> Andreas Plesch
> 39 Barbara Rd.
> Waltham, MA 02453
>

-- 
Andreas Plesch
39 Barbara Rd.
Waltham, MA 02453
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