Hello! There are certain areas in Factorio that we haven't really had the courage to change for a long time. One of those areas has been the rail system...
If I understood the FFF correctly, that is not what they’re doing; they aren’t working with a half dozen straight sections, each fitting a single “square” (in this case a 2x2), and leaving curves up to the player. Instead they’re adding a new curve (the half-S) to be used with the other pieces.
For reference here’s how it works in Transport Tycoon / OpenTTD:
If implementing something similar in Factorio (note: the colours mean nothing, they’re just to distinguish the pieces of rail):
The later can be smoothed out to look a bit more like curves, but the basic units are all straight and diagonal rails.
I think you answered your own question.
If I understood the FFF correctly, that is not what they’re doing; they aren’t working with a half dozen straight sections, each fitting a single “square” (in this case a 2x2), and leaving curves up to the player. Instead they’re adding a new curve (the half-S) to be used with the other pieces.
For reference here’s how it works in Transport Tycoon / OpenTTD:
If implementing something similar in Factorio (note: the colours mean nothing, they’re just to distinguish the pieces of rail):
The later can be smoothed out to look a bit more like curves, but the basic units are all straight and diagonal rails.