[x3d-public] Networking RenderedTexture, Viewpoints and Events
John Carlson
yottzumm at gmail.com
Sun Mar 22 13:55:43 PDT 2026
RenderedTexture and Viewpoint could inherit from X3dUrlObject and
X3dNetworkSensorNode for url and trigger.
Another thought would be allowing download or upload events to/from a local
file or stream. Can we use the EAI protocol, perhaps? DIS is possible,
but setting up secure UDP can be hard to set up over VPN and DIS isn’t
available in X_ITE. I realize there’s an
https://github.com/open-dis/DISWebGateway/tree/master
for web traffic, plus a JavaScript library on the browser side (below).
Can WebTransport (HTTP/3 or QUIC) or WebRTC (peer-to-peer) be used for DIS?
I use a socket.io interface, which can leverage HTTP/S, WebSockets or
WebTransport. I just don’t know how to hook into the X3D event stream
currently, without tons of JavaScript. DIS doesn’t require the scene
author to know any JavaScript. And I don’t know how to fully articulate
avatars over the network with breaking up the humanoid into DIS chunks. Do
we have an example of a networked humanoid with DIS? Would OSC/VMC be
better for humanoids?
Perhaps ROUTEs could contain fromUrl And toUrl fields? Or there could be
ROUTEGroups with URLs for try the ROUTEs inside in? I haven’t heard this
design discussed before.
I think Urls are great for Networking, particularly because you can specify
them as MFStrings, to enable different groups to control the same nodes on
a website.
I am also reviewing DIS examples, looking for a Humanoid example? How’s
the X3DOM pull request? It looks like this is the most recent DIS
implementation in X3DOM:
https://github.com/mcgredonps/x3dom/tree/master/src/nodes/DIS
I guess I’ll look into it!
John
On Sun, Mar 22, 2026 at 1:43 PM John Carlson <yottzumm at gmail.com> wrote:
> Perhaps Viewpoint should have the trigger and url, to download (filename)
> or uploading the X3D scene or Texture of the Viewpoint? Watch recursion
> though.
>
> See my softbody2 demo for downloading a .glb. Why not X3D as well?
>
> Thanks all for revealing this node!
>
> One could specify whether one wanted a Texture, GlTF or X3D scene to be
> captured.
>
> John
>
> On Sun, Mar 22, 2026 at 12:12 PM Don Brutzman via x3d-public <
> x3d-public at web3d.org> wrote:
>
>> *Wow! *Thanks for this interesting proposal Holger (and Michalis, and
>> X3DOM team). This is an excellent and interesting prospect for X3D 4.1.
>>
>> - X3D Architecture 4.1 draft — ISO/IEC 19775-1:202x — X3D
>> Architecture index page
>> <https://www.web3d.org/specifications/X3Dv4Draft/ISO-IEC19775-1v4.1-CD/Part01/Architecture.html>
>> -
>> https://www.web3d.org/specifications/X3Dv4Draft/ISO-IEC19775-1v4.1-CD/Part01/Architecture.html
>>
>> with list of current v4.1 draft nodes at
>>
>> - X3D Architecture draft 4.1, Node, abstract node type, and abstract
>> interface index
>> -
>> https://www.web3d.org/specifications/X3Dv4Draft/ISO-IEC19775-1v4.1-CD/Part01/nodeIndex.html
>> - New nodes in X3D 4.1 draft: EnvironmentLight
>> <https://www.web3d.org/specifications/X3Dv4Draft/ISO-IEC19775-1v4.1-CD/Part01/nodeIndex.html#EnvironmentLight>
>> , FontLibrary
>> <https://www.web3d.org/specifications/X3Dv4Draft/ISO-IEC19775-1v4.1-CD/Part01/nodeIndex.html#FontLibrary>
>> , HAnimPose
>> <https://www.web3d.org/specifications/X3Dv4Draft/ISO-IEC19775-1v4.1-CD/Part01/nodeIndex.html#HAnimPose>
>> , InlineGeometry
>> <https://www.web3d.org/specifications/X3Dv4Draft/ISO-IEC19775-1v4.1-CD/Part01/nodeIndex.html#InlineGeometry>
>> , Tangent
>> <https://www.web3d.org/specifications/X3Dv4Draft/ISO-IEC19775-1v4.1-CD/Part01/nodeIndex.html#Tangent>
>> - also at X3D Tooltips in English version 4.0 (with X3D version 4.1
>> draft) <https://www.web3d.org/x3d/tooltips/X3dTooltips.html>
>> - https://www.web3d.org/x3d/tooltips/X3dTooltips.html
>>
>> *Looking back:* perhaps someone knows if any Web3D Conference papers
>> were written on this topic? I searched the ACM Digital Library but was not
>> able to narrow the query well enough.
>>
>> - WEB3D Conference - Home <https://dl.acm.org/conference/web3d>
>> - https://dl.acm.org/conference/web3d
>>
>> *Looking ahead: *wondering if we might add an inputOnly field to trigger
>> saving the rendered image to a file, along with a local relative url for
>> saving that file? Having such functionality might be a powerful way for
>> people to use X3D models as an authoring tool. The specification would
>> necessarily need to add some security precautions for implementations that
>> will keep end users in charge of permitting such a capability.
>>
>> Have fun with X3D! 😁 👉 📷
>>
>> all the best, Don
>> --
>> X3D Graphics, Maritime Robotics, Distributed Simulation
>> Relative Motion Consulting https://RelativeMotion.info
>>
>>
>> On Sun, Mar 22, 2026 at 2:44 AM Holger Seelig via x3d-public <
>> x3d-public at web3d.org> wrote:
>>
>>> The latest version of X_ITE now includes the new RenderedTexture node.
>>> This node is very close to Castle's and X3DOM's RenderedTexture. Therefore,
>>> it makes sense to standardize this node and possibly include it in the new
>>> X3D 4.1 standard.
>>>
>>> Description (from Castle)
>>> RenderedTexture is a texture rendered from a specified viewpoint in the
>>> 3D scene. This can be used for a wide range of graphic effects, the most
>>> straightforward use is to make something like a "security camera" or a
>>> "portal", through which a player can peek what happens at a other place in
>>> 3D world, or to make a mirror.
>>>
>>> Documentation for the node in the respective browsers
>>> X_ITE:
>>> https://create3000.github.io/x_ite/components/texturing/renderedtexture/
>>> Castle:
>>> https://castle-engine.io/x3d_implementation_texturing_extensions.php#section_ext_rendered_texture
>>> X3D’OM: https://doc.x3dom.org/author/Texturing/RenderedTexture.html
>>>
>>> Example file in X_ITE Playground
>>>
>>> https://create3000.github.io/x_ite/playground/?url=https://create3000.github.io/media/examples/Texturing/RenderedTexture/RenderedTexture.x3d
>>>
>>> Best regards,
>>> Holger
>>>
>>> —
>>> Holger Seelig
>>> holger.seelig at yahoo.de
>>>
>>>
>>> _______________________________________________
>>> x3d-public mailing list
>>> x3d-public at web3d.org
>>> http://web3d.org/mailman/listinfo/x3d-public_web3d.org
>>>
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>
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