CircularProjectileCreationSpecification
located at: https://lua-api.factorio.com/latest/con ... cification
does not have its field names documented and shows as this:
CircularProjectileCreationSpecification field names are not documented
Re: CircularProjectileCreationSpecification field names are not documented
It says type is a tuple, so probably supposed to be an array {RealOrientation, Vector}.
Re: CircularProjectileCreationSpecification field names are not documented
Tuple's on the C++ side are not named but just referenced by index or type in the tuple. So this would be correct in that they have no names and are just extracted [1] and [2] from the lua input.
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Re: CircularProjectileCreationSpecification field names are not documented
I think, if it specified the names as "[1]" and "[2]", a person familiar with Lua will understand those are indices.
Re: CircularProjectileCreationSpecification field names are not documented
I changed this for the next version, although the way tuples are shown will likely change some more in a future release.