This addon is highly specialised in exporting assets into game engines using glTF file format. It achieves that by giving the user access to a library that does most of the heavy lifting and a very fast way to run your code via buttons minimising time between exporting and seeing new changes within the game engine.

Have a look at the features and limitations section below to see if it fits your purpose, if you do not need any of this functionality I highly advise you to stick to the default glTF exporter.

Otherwise get started here.

Features

• Additive workflow, start with nothing and add only what you need.
• Non-destructively merge multiple meshes into one.
• Add as many UV maps, vertex colors or shape keys to your meshes as you need.
• Break down your complex scene into smaller files.
• Easily add hierarchies, collections or singular objects.
• Non-destructively remove objects with with filters and blacklists.
• No glTF scenes required, making it possible to create asset libraries (for example file containing only meshes).
• Non-destructively strip bones from armatures with filters and blacklists.
• Automate excluding useless control bones and trimming bone prefixes when using rigify armatures.
• Use timeline markers, manual frame ranges or NLA tracks to bake animations.
• Manually specify which NLA tracks are to be grouped together into one animation, allowing for the use of additive tracks.
• Force animation to be use stepped interpolation.
• Easily create buttons to run your code from outside of the text editor.
  

Limitations

• Cannot export base meshes, each mesh has to be assigned to an object in scene in order to be exported.
• When merging meshes, UV map, vertex color and shape key names must match.
• Meshes can only be based on blender meshes, no curves, NURBS, etc.

This addon is still a work in progress, and does not support all data types:

* Meshes retain their material slots.