I chose to make three-way turnouts have 5 conns (last one is not used) so
that they can be distinguished from crossings easily without refactoring the
code. Three-ways should have their last entry with {["3"]=0} instead as a sort
of internal mark.
This shall replace all "pos_to_string" hashes in the long term. Performs a bit better than pos_to_string (but still worse than the "nested tables" layout the nodedb uses
(an unmatched open parenthesis leaves a tension that will stay all day... 2 do even more
The occupation system as it is now will change. For each position, I will save the index in the train's path,
and implement a callback system. I need this because the occupation window system will not be enough to cover all use cases
(e.g. to make a train stop with it's center or back at a certain position, I need 3 different brake distances, which doesn't fit into the scheme)
...to support an arbitrary number of connections for rails, which leads to these new features:
- switches now get recognized by the trackworker correctly
- ability to add real rail crosses
During this, I also rewrote the rail registering system and the conway function (important part of path prediction)
Note, developers: the track preset format changed, you might need to rewrite them according to the presets in tracks.lua if you wrote your own
(possibly breaks advcarts)
This finally fixes the need to rotate atc rails and bumpers.
Also prefers rotation that is closer to the player's look dir (placed bumpers will face the player)
