[x3d-public] node-java X3DJSAIL and 1 example that works, and one that doesn't

[John Carlson]

Duh, there's no X3D DOM node without x_ite_dom?

John

On Sat, Apr 11, 2020 at 10:05 PM John Carlson <yottzumm at gmail.com> wrote:

> I tried pasting my SAI code into developer tools as you suggest:
>
> var browser = X3D.getBrowser();
> var scene = browser.currentScene;
> X3D0 = document.querySelector("X3D");
> X3D0.profile = "Immersive";
>
> And got:
>
>
>
> VM55:4 Uncaught TypeError: Cannot set property 'profile' of null
>     at <anonymous>:4:14
>
> Suggestions?  I must be missing something in X_ITE?
>
> John
>
> On Sat, Apr 11, 2020 at 8:40 AM Andreas Plesch <andreasplesch at gmail.com>
> wrote:
>
>> Hi John,
>>
>> x_ite just follows standard SAI, internal or external:
>>
>> //get Browser
>> browser=X3D.getBrowser(); //X3D is global defined by x_ite.js
>> //get current scene
>> scene=browser.currentScene;
>> //make shape node
>> shape=scene.createNode('Shape');
>> //make box node
>> box=scene.createNode('Box');
>> //set geometry field
>> shape.geometry=box;
>> //add as root node (for example)
>> scene.addRootNode(shape);
>>
>> For me the easiest way to experiment with scripting like this, is to
>> use the Chrome dev tools console with a simple scene like:
>>
>> https://www.web3d.org/x3d/content/examples/Basic/UniversalMediaPanoramas/desert3X_ITE.html
>> Following the steps will give you a white box visible in the active scene.
>>
>> x3dom uses the DOM as an interface to the scene. So you create DOM
>> elements using HTML5 methods and add those to the Scene DOM element.
>> There may be a way to avoid using the DOM and use internal, SAI like
>> functions. For example, the javascript domNode._x3dom property gives
>> you access to fields and methods for a node. But usually it is easiest
>> and most interoperable on a HTML5 page to use the DOM.
>>
>> The field names are the same across browser but the internal
>> representation of field values (as a javascript object) is very
>> different. So one cannot use the results of SAI x_ite calls directly
>> with x3dom, or vice versa. It is necesssary to go through encodings.
>>
>> I do not think X3DJSAIL deals a lot with Browser or ExecutionContext
>> SAI functions since they are tied to the specific browser but I may be
>> wrong.
>>
>> Andreas
>>
>> On Sat, Apr 11, 2020 at 2:58 AM John Carlson <yottzumm at gmail.com> wrote:
>> >
>> > Could Andreas explain how to use createNode in the context of X_ITE SAI?
>> > I think that createNode may be the one significant thing missing from
>> X3DOM SAI.
>> > There's an unrelated one in the physics code.
>> >
>> > That is, you use createNode to createNodes in SAI, then you use the
>> fields of the returned object.  Are these the same across browsers?
>> >
>> > Here's how to get a node from the standard:
>> >
>> > Browser.currentScene.createNode('Shape');
>> >
>> > Again, there is no createNode in X3DJSAIL to speak of.
>> >
>> > Thanks,
>> >
>> > John
>> >
>> > On Sat, Apr 11, 2020 at 1:24 AM John Carlson <yottzumm at gmail.com>
>> wrote:
>> >>
>> >> We have 2 versions of  JavaScript server side API, Nashorn and Node,
>> both dependent on X3DJSAIL, and the code looks similar.  However, we do not
>> have a JavaScript native version yet, even with JSweet (it's incomplete).
>> >>
>> >> I believe that we should pursue an external SAI compatible with X_ITE,
>> since X3DOM already has an external SAI.
>> >>
>> >> Below is an example of "External" with X_ITE. Note that X3D is
>> required to be defined, and x_ite.js should be loaded before X3D is
>> called.  So how do we do that in node?  This is why I've been suggesting
>> headless browsers!
>> >>
>> >> ...so...I need to figure out an example of Transform in the standard.
>> It would seem like the thing to do would be to implement createNode?  Are
>> there any examples of createNode?  Yes, in X_ITE at least.  Do we need to
>> create an execution context to use it?  Yes!
>> >>
>> >> Is there an X_ITE example of external createNode?
>> >>
>> >> Yes!
>> >>
>> >> As far as I can tell there is not a X3DOM version of ECMAScript SAI's
>> createNode.
>> >>
>> >> So I think we should start with X_ITE as I said before, and try to
>> create an External ECMAScript SAI script (not DOM).
>> >>
>> >> Do people agree that we should try to create an ECMAScript SAI example
>> from outside X_ITE?
>> >>
>> >> It appears that we either have to start from X3D(), below.   Can we
>> make X3D() into an external SAI?
>> >>
>> >> Do we need a browser in nodejs?
>> >>
>> >> has anyone looked into chrome embedded framework?
>> >>
>> >> John
>> >>
>> >>
>> >>
>> >>
>> -----------------------------------------------------------------------------
>> >> function load_X_ITE_XML(content, selector) {
>> >>         X3D(function() {
>> >>                 var browser = X3D.getBrowser(selector);
>> >>
>>  browser.replaceWorld(browser.createX3DFromString(content));
>> >>         }, function() {
>> >>                 alert("Failed to render XML to X_ITE");
>> >>         });
>> >> }
>> >>
>> >> function load_X_ITE_DOM(element, selector) {
>> >>         X3D(function() {
>> >>                 if (typeof X3D.getBrowser !== 'undefined') {
>> >>                         var browser = X3D.getBrowser(selector);
>> >>                         if (typeof browser !== 'undefined' && typeof
>> browser.importDocument !== 'undefined') {
>> >>                                 var importedScene =
>> browser.importDocument(element);
>> >>                                 browser.replaceWorld(importedScene);
>> >>                         }
>> >>                 }
>> >>         }, function() {
>> >>                 alert("Failed to render DOM to X_ITE");
>> >>         });
>> >> }
>> >>
>> >> function load_X_ITE_JS(jsobj, selector) {
>> >>         X3D(function() {
>> >>                 if (typeof X3D.getBrowser !== 'undefined') {
>> >>                         var browser = X3D.getBrowser(selector);
>> >>                         if (typeof browser !== 'undefined' && typeof
>> browser.importJS !== 'undefined') {
>> >>                                 var importedScene =
>> browser.importJS(jsobj);
>> >>                                 browser.replaceWorld(importedScene);
>> >>                         }
>> >>                 }
>> >>         }, function() {
>> >>                 alert("Failed to render JSON to X_ITE");
>> >>         });
>> >> }
>> >>
>> -------------------------------------------------------------------------------------------------------------
>> >> John
>>
>>
>>
>> --
>> Andreas Plesch
>> Waltham, MA 02453
>>
>
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