Just like TeleportDialog it's based off showBlockingDialog, but as number of package is higher when possible showTeleportDialog will be after other dialogs handling code.
TeleportDialog is based off BlockingDialog and it's needed for server to ask client what teleport hero should be teleported to.
It's also contain list of possible exits, identifier of currently used channel and also impassable option.
If impassable set to true then client will remember that current teleport channel is lack of exit point.
This code belongs to callback because both player and AI shouldn't directly access information about teleport channels.
For example pathfinder code need to check teleport channel type only based on information about objects player already seen.
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.
This is need to avoid crashes like one happen in 2084, but then game bahaviour incorrect.
I'm not exactly sure if this possible currently, but I can imaging this would happen if hero decide to attack bank while staying on it.
This one is replicating original game behaviour and fixes issue 1990 and related to issue 2084.
Currently this is mainly caused problem with teleporters which lead to crash in AI due to unexcepted hero loss.
