The glTF specification packs data into buffers, labelling
the type of each part with an integer. The first six values
gltfTypes are the
integers used there, with
added for completeness; those values are taken from
OpenGL header files.
gltfTypes is simply a named vector containing integer values.
These are used in the
gltfTypes #> byte ubyte short ushort uint float int double #> 5120 5121 5122 5123 5125 5126 5124 5130