Developer needs help on RE - Trigger entity spawning

[Ismoh]

Might be that I could use some RE help. I never was depening on RE help so much.

The problem I have is:
My concept is that the server holds the truth. Spawning, moving entities, everything. Thats why I remove all entities on client side.
BUT... There is no Noita API function (or I dont know a specific one), which triggers spawning entities, therefore the client wont see any entitites spawning, when not following the servers player. I have no idea where to look in ghidra or even how to use it or if there is any Noita API function or a specific combination of components, which are needed.

I think I am going to create a 'wanted help' issue on github, because if this isnt fixed, multiplayer would mean to follow the servers player all the time and this sycks.

If I wont remove entities on client side, everything would be multiplied by amount of clients, which is even more sycking!

Anyone out there you can help me?

I still want to have a look on RegisterSpawnFunction, because I dont know it or used it before.

I really hope there will be a solution, because it's a big game changer!

[Ismoh]

Based on the default player_base.xml I created in the past a client_player_base.xml to see a copy of clients minä.
I commented out everything not need by best guess. As @GrandpaGameHacker mentioned, after RE Noita, it might be enough to add a CameraBoundComponent (double check wording) to make the clients minä copy trigger spawning entities on server instance to be synced on all clients.
This is needed, because entities on client will be removed by default, otherwise everything would be duplicated and not in sync.

[gustovafing]

PlatformShooterPlayerComponent controls which entity the camera follows and where it is positioned, and the GameGetCameraPos, GameSetCameraPos, GameSetCameraFree allow for the camera to be moved with lua, but I don't think they will be useful for what we need to do.

[gustovafing]

I assume there can only be one entity with a PlatformShooterPlayerComponent in the world, as the camera can't be centred on two entities.

[Ismoh]

How about adding the component and setting center_camera_on_this_entity and move_camera_with_aim to 0?
I think, when the local minä dies, the camera might move to the other players, when setting those values to 1 after minä died. Would be a nice feature?!

[Ismoh]

As discussed with @ofoxsmith we decided to implement a different approach.
We're going to have a serialisation and compression of a whole entity within his children and all components, which then is shot over network to server. Clients eentity will be destroyed. Server then sends this chunk of squeezed entity to all other clients, which then spawns the entity, if it is in range (camera bounds)
There will be pitfalls like:

• Do not reuse the entityId from clients.
• Are there any other properties of the entity or components, which are only peer related, i.e. minäs inventory.
• Performance issues?
• Entities will be respawned, but I don't care atm: client1 is on x 567, y -647. Kills all entities. Client2 go to the same position after 30mins. Entities of Client2 will be spawned.

[Ismoh]

@ofoxsmith I created a branch based on develop!