Date: 2025 09-September 03

Python 3.10 is required, last I checked

so

CG 0

Ah — now it makes sense. You want to replace your FBX export with GLB export so that you can distribute 3D assets without forcing users to deal with Python 3.10 and fbxsdkpy.

Here’s the breakdown of how you can approach this:

1️⃣ Why GLB is easier than FBX for distribution

• FBX: Closed format, requires Autodesk FBX SDK (fbxsdkpy) — heavy dependency, often Python-version locked.

• GLB: Open, binary variant of glTF, widely supported in web, mobile, and desktop.

• Can be written pure Python, often using libraries that don’t require compiling C++ extensions.

2️⃣ Python Libraries for GLB Export

You have a few good options:

1. pythreejs or trimesh + panda3d

   • trimesh can export 3D meshes to glTF/GLB:

   import trimesh
   
   mesh = trimesh.load("my_scene.fbx")  # you can also create it programmatically
   mesh.export("my_scene.glb")
   

   • Supports pure Python meshes, no FBX SDK needed.

   • Works for multiple meshes and scenes.

2. pygltflib

   • Lower-level GLB writer, you manually create buffers, scenes, nodes.

   • Pure Python, lightweight, good if you already have mesh data in arrays.

3. assimp via pyassimp

   • Can read FBX and write GLB:

   import pyassimp
   
   scene = pyassimp.load("my_scene.fbx")
   pyassimp.export(scene, "my_scene.glb", file_type="glb")
   pyassimp.release(scene)
   

   • Caveat: pyassimp sometimes needs C/C++ dependencies; better for controlled environments.

3️⃣ Recommended Approach

Since your goal is maximum portability:

1. Use trimesh if your Python code already constructs meshes and curves.

2. Programmatically generate mesh/scene data, then export to GLB:

import trimesh
import numpy as np

# Example: create a simple curve in 3D
points = np.array([[0,0,0], [1,2,0], [2,3,1]])
lines = np.array([[0,1], [1,2]])

curve = trimesh.load_path(points, lines)
curve.export("curve.glb")

• Pure Python. No fbxsdkpy.

• Works on Termux, Windows, Linux, anywhere Python + numpy + trimesh runs.

4️⃣ Migration Strategy from FBX → GLB

1. Identify all FBX export points in your code.

2. Replace fbxsdkpy calls with trimesh GLB export (or pygltflib if you need low-level control).

3. Keep original mesh/scene logic; only the export step changes.

4. Test in your web viewer or 3D app.

If you want, I can rewrite your current FBX export function to a GLB-exporting function using trimesh, keeping all curves and stacking logic intact.

Do you want me to do that?