TurnInfo contain information about what movement-related bonuses and MP hero going to have on certain turn.
This way we can collect this information once for each turn so it's huge performance boost.
Now pathfinder take into account different bonuses for different tuns. So if you only have FLYING_MOVEMENT bonus from Fly spell for one turn then pathfinder will only let you use air layer within one turn only.
That work for cost calculations too. Let's say you have two bonuses:
- FLYING_MOVEMENT with 20% penalty for next 2 turns
- FLYING_MOVEMENT with 40% penalty for 5 turns
Now pathfinder using correct penalty for each turn so movements in air layer going to be more expensive on 3-5 turns.
Before gates on underground layer didn't had any channel assigned and of course any function that attempt to check -1 channel caused crash.
Also I find out that at point postInit executed It's possible to get mutable gamestate via gameState() callback so we don't need to pass it there.
Now CGTeleport is not publicly available handler, but generic class for teleport channels usage.
Teleport channels are stored as part of information about the map.
TeleportChannel is structure that contain two vectors of entrances and exits for certain teleport channel. It's also store passability state independently which almost only useful for Player and AI as they can't know if channel passible or not until enough entrances / exits are visible or server passed them information that certain channel is impassible when they visited entrance.
ETeleportChannelType is determined by checking intersection between entrances and exit vectors or checking their size:
- IMPASSABLE: one of vectors empty or only one entrance id is same as only one exit id.
- BIDIRECTIONAL: contents of both vectors is exactly the same.
- UNIDIRECTIONAL: contents of both vectors do not intersect.
- MIXED: contents of vectors only partially intersect. Not currently used; added for future modding.
