collada2gltf geolocation extension issue

CesiumJS
1

Hi All!

Does anyone had the opportunity to try this extension in order to geo reference textured 3D models (https://github.com/KhronosGroup/glTF/tree/master/specification/extensions/geolocation)?

As I have understood, an additional JSON file (https://github.com/KhronosGroup/glTF/blob/master/specification/extensions/geolocation/example/example.json) is required somewhere in order to add lat/lon coordinates, but I have not understood:

  • where to put this file
  • when (after the conversion or before)
  • how (loading by the command line tool? how?)
  • if the already build version of the tool (https://github.com/KhronosGroup/glTF/wiki/Converter-builds) supports this extension or I have to compile the source code including it in some way

Thx you in advance :slight_smile:

Umberto

2

Hi Umberto,

Currently, the geolocation extension is not complete and is not implemented in collada2gltf or Cesium.

We usually create a CZML file that points to the glTF and defines it position and orientation. See https://github.com/AnalyticalGraphicsInc/cesium/wiki/CZML-Content

Patrick