[x3d-public] Python authoring/mesh editing; Web3D TypeScript engine

[vmarchetti at kshell.com]

Referring to the question toward the end, to knowledge the x3d.py module does not offer a navigation analogous to 'parent'

Because of the DEF/USE mechanism which allows a node to be situated at multiple locations in a scenegraph, there is no simple definition of a parent node.

In a DOM tree or XML ELement tree we can ask what is the parent of the encoding element that contains the DEF attribute of a X3D node, but that is not a concept that transfers from encoding to encoding

Vince Marchhetti


> On Feb 12, 2024, at 4:19 AM, John Carlson via x3d-public <x3d-public at web3d.org> wrote:
> 
> Sorry for more posts.
> 
> Other choices are pygfx+trimesh and Panda3d.  pygfx is like Three.JS, but in Python and is supported by webgpu packages.  Panda3d uses older shading languages, it looks like.
> 
> Searching the web…
> 
> A TypeScript WebGPU Web3D engine.  Beta! Runs in Chrome/Edge 113+ right now.  Not tested by me.
> 
> https://github.com/Orillusion/orillusion
> 
> Kotlin and webgpu:
> 
> https://github.com/kgpu/kgpu
> 
> 
> I think I will probably work on creating a renderer using pygfx that renders x3d.py subclassed scenes.  I will focus on authoring PyIndexedFaceSets, PyGroups and PyTransforms first, which hopefully will satisfy my use  case.  Ultimately, I will view the functions as compatible with x3d.py (with some work).  I don’t know about events yet.
> 
> Anyway.  I’m trying to keep up with WebGPU, etc.
> 
> I’m favoring non-web renderers right now. I realize that JavaScript support will be minimal.  Ultimately, I’ll move towards Script nodes.
> 
> Hopefully all the webgpu stuff will be integrated into Modular Mojo at some point.
> 
> A big question at this point is, does x3d.py support parent nodes in the scenegraph?
> 
> Thanks!
> 
> John
> 
> On Mon, Feb 12, 2024 at 1:03 AM John Carlson <yottzumm at gmail.com <mailto:yottzumm at gmail.com>> wrote:
>> I’m thinking of porting my multiuser Java/JOGAMP mesh/line editing/authoring system to something compatible with current Python (3.12?) and Vulkan or WebGPU compatible.  X3D import/export would be a bonus!
>> 
>> Right now pyOCCT, pythonocc and OCP are candidates, but I have no clue how they handle my use case.
>> 
>> I wil probably choose random colors for the vertices, so color editing is not currently required.  I want to create points, segments, triangles, quadrilaterals and more general polygons.
>> 
>> Thanks any for feedback!
>> 
>> John 
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