Using an underscore before macro variables avoids cluttering up the
global namespace. While this isn't much of a problem right now, it's
good practice that'll keep us from problems in the future.
Tried simplifying things a bit, although not nearly as much as I wanted.
Ideally, we'd either have one of two situations:
- A single set of calculations based on values depending on the
direction of the connection
- A bunch of "generic" calculations done before applying simple
modifiers to them in the final `if` block
Right now it's an icky mix of both and I'm not really sure what to make
of it.
It now only takes one numerical parameter, which is the offset of the
target map relative to the source map, much like in AdvancedMap. This
makes it easier to make connections and avoids having to calculate these
values by hand, and/or "mess with the values 'till it works", as many
have been doing thus far. It's just one, easy-to-understand value.
To convert from the old macro to the new macro, just take the fourth and
the fifth parameter, and calculate `<4th_param> - <5th_param>`. The
result is the value required for the new macro.
The previous name for this was rather misleading. It isn't an actual
jump like you'd expect the `jp` instruction to behave as. Instead, it
behaves more like a `farcall`.
This also makes it consistent with its current command ID name of
`TX_FAR`.
