allow rotating carriages while connected

[Optera]

What:

Extend entity.rotate() for carriages to rotate the carriage and swap the connection points without disconnecting it from a train.

Why:

Currently to rotate a locomotive you have to disconnect, rotate and reconnect and prey it's not in some weird position or right next to another train so it connects properly.

Code: Select all

loco.disconnect_rolling_stock(defines.rail_direction.back)
loco.disconnect_rolling_stock(defines.rail_direction.front)
loco.rotate()
loco.connect_rolling_stock(defines.rail_direction.back)
loco.connect_rolling_stock(defines.rail_direction.front)

Doing all rotation in one command could also add the benefit of retaining train.id.

[eradicator]

Slight (?) addition: Add LuaTrain.rotate() to rotate the whole train in place like in Open Transport Tycoon Deluxe or any other train-simulator, where trains in Terminus stations can rotate in place when leaving.

[Rseding91]

I would attempt to add support for one or both of those but I have no idea how to rotate a rolling stock while it's connected to other rolling stocks. The internal train logic is still one of the things that alludes me.

[Godmave]

Brute force for the luaTrain.rotate() would be serialization and deserialization in the opposite direction, but (since you can on the c++ side) keep the trainId.
Same should work for the lone carriage/loco.

[betrok]

In general, the ability to rebuild a train without changing its id will be extrimly useful.
Even better if it will be possible to save train, modify it and place it somewhere later with same id as before.

Train ramps

[Optera]

Are there plans on making rotating carriages without decoupling a feature for 0.17?

All it'd take is flip front and back connection and spin the carriage 180° without changing the train.id.