quasi_live_modelling.js

// change YOURID with... YOUR ngrok id ;)

var lastModelTimestamp = null

var intervalCheck = setInterval(newModelReady, 500)

function newModelReady(){
	fetch('http://YOURID.ngrok.io/timestamp.txt').then( response => { return response.json() } )
    .then( timestamp => checkIfNovelModelAvailable(timestamp) )
}

function checkIfNovelModelAvailable(timestamp){
  if (lastModelTimestamp != timestamp){
    lastModelTimestamp = timestamp
    refreshModel()
  }
}

function loadAssetsFromURLs(URLs){
  var elements = []
  for (var url of URLs){  
    var el = document.createElement("a-entity")
    AFRAME.scenes[0].appendChild(el)
    el.setAttribute("media-loader", { src: url, fitToBox: true, resolve: true })
    el.setAttribute("networked", { template: "#interactable-media" } )
    el.setAttribute("uploadedAssets")
    elements.push(el)
  }
  return elements
}

function refreshModel(){
  for (var e of AFRAME.scenes[0].querySelectorAll("[uploadedAssets]")) e.remove()
  var el = loadAssetsFromURLs([
    "http://YOURID.ngrok.io/model.glb#" + +new Date()
    ])
  el[0].setAttribute("position", "0 1 0")
}

/*
# Blender script :
# (could be threaded or with shortcut)

def saveForLiveLoad():
    import time
    import bpy
    with open('/home/fabien/Prototypes/modellingSync/timestamp.txt', 'w') as out:
        out.write( str( time.time()) )
    bpy.ops.export_scene.gltf(filepath='/home/fabien/Prototypes/modellingSync/model.glb')

*/