gltf

Sandcastle example:
https://sandcastle.cesium.com/#c=hVA9a8MwEP0rhztYhiDTuY4ppIUOgQ6BTl4U6ZqKyJIrnRzc0v9eOUogoYFqu/dx7+mks4Fg1HhAD0uweIAVBh17/nbEWFfI47xyloS26LuieuhsZ7OHB+kR7WYQEp9HtPQirDIJVxjIu4llsXIy9onlnxH9tEGDkpxn5d1JlsPKiguljmvWOhCmNFZKo+W+XACrYNnCd2cBZCrtDHLjduyfGjo85QRUrJq7wOmzVwV/cstiUTSBJoPtrJvfo+4H5wmiN4zzmrAfjCAM9TbKPRKXIeSlAE19aW2UHkGr5Y3zgTQihMS8R2M2+gu7om3qpP9jNU4obXevI3ojpln2cd+uM8

In addPipelineExtras, a _pipeline object with a source is added to the extras of each buffer, so it can be used in https://github.com/CesiumGS/gltf-pipeline/blob/47e25f05dcb86d271675f9b5fa5be8dee8205b55/lib/mergeBuffers.js#L29

If a custom stage adds a buffer, it will not have a extras._pipeline object and therefore, will cause a crash in the line above.

A possible solution would

https://github.com/donmccurdy/glTF-Generator-Registry

The following glTF primitive modes are not implemented:

-TRIANGLE_STRIP
-TRIANGLE_FAN

Unity does not support those out of the box, so glTFast needs to generate indices (similar to how it creates them for missing indices on TRIANGLES mode primitives).

Unfortunately I've never encountered such a glT

The Writer and Reader classes are static classes with a single static method each, write() and read(). Both would benefit from refactoring into individual writeJSONDocument() and readJSONDocument() functions, rathe

You should be able to add text to a scene. Either as a Text Geometry or SDF text, probably both.

There's already a text component in AFrame that we can use in Hubs. We would need to add a new Spoke node with the ability to preview the text.

I think we should export the following properties:

value
align
anchor
baseline
color
he