This is a multiplayer mod for Derail Valley

• Player position sync
  • todo: support parenting to trains
  • todo: unbreak map markers
  • todo: hands / models
• train car sync
  • cargo sync
  • coupling sync
  • todo: damage sync
• loco sync
  • shunter
  • todo: all other locos
  • spawning is disabled of them
• train set sync
  • todo: maybe optimize the thresholds for the allowable error
  • todo: moving all cars to one host
  • all cars that are coupled together should be from one host (spawned by one player)
• junction sync
• todo: turntable sync
• todo: jobs
• Hard player limit: 1023 local connections max per session
  • todo: properly clean up after players disconnect
• todo: NAT hole-punching
• todo: matchmaking /
• todo: probably a lot more still

• jobs and locos do not spawn
• stops the game from forcing you into full screen
• stops the game from pausing when in the menu or tabbed out
• forcefully enabled spawn mode on the remote and enables it to spawn locos
• add a instance number to the end of the title for recording multiple instance with OBS

• Install BepInEx (https://github.com/BepInEx/BepInEx/releases) version 5.1 or later Currently included
• Extract into steamapps\Derail Valley next to DerailValley.exe

• start the game twice in windowed mode
• on one instance run the console commands mp.authority and mp.listen
• on the other run mp.connect
• all cars that are coupled together should be from one host (spawned by one player)

• all but one client must be able to accept connections from the other client
  • in practice this mean you must configure port forwarding in you router
  • the default port is tcp:2000 but any TCP port can be used
• one player must use the console commands mp.authority and mp.listen [<port>]
• the other player must run mp.connect <public IP of the first player> [<port>]
• if the port arguments are omitted, they will default to 2000
• both IPv4 and IPv6 addresses are supported, DNS names will not be resolved
• Player names will be taken from Steam, if possible
  • the local player name can be set with the console command mp.username <new username> (spaces are not supported)
  • non-ASCII characters are theoretically supported, but probably not available in the font
• the player color is chosen at (very pseudo) random
  • can be set to any RBG color with mp.playercolor <R> <G> <B>
• all cars that are coupled together should be from one host (spawned by one player)

• todo: currently bugged, doesn’t work
• every client must connection to each other
• first connection must be to the authority, other than that order shouldn’t matter as long as at the end before players actually start playing everyone is connected to everyone else

• Derail Valley is required for building
• It must be located in or symlinked from C:\DerailValley
• Run mklink /J C:\DerailValley "<Path to DV>" in a admininstrator level command prompt to create the symlink
• Alternativly provide the game path during build as a command line parameter: dotnet build -p:GameDirectory=<Path to DV>