This needs some improvements, because:
1) Sometimes the cell authority sends the death animation too late and a different one gets played on the other clients
2) There is probably a simpler check that can be done for position changes during a death animation.
Previously, it was possible for a Container packet to clear all equipment slots for an actor without the actor's authority then sending an equipment packet to correct that, due to packet loss or sudden disconnection, leading to actors not wearing any equipment as soon as they acquired a new authority.
This ensures that newly initialized LocalActors will now autoEquip.
Previously, a Container packet with a SET action for an actor would clear their entire InventoryStore, also clearing all of their equipment slots. The actor's authority would then autoEquip new equipment for the actor, but that new equipment would not actually get sent to the other players. As a result, they would see the actor fighting with hand-to-hand attacks, while also not actually wearing anything despite being rendered as wearing the same clothes and armor as before.
This commit makes the actor's authority resend the actor's equipment as soon as the Container packet has caused the autoEquip to happen.
Previously, creatures with fast spellcasting animations would cast their spells before their success had actually been calculated, causing them to fail.
Add serverside script functions for determining the killers of both players and actors.
Use unsigned ints for script functions returning an object or actor's refNumIndex or mpNum.
Remove updateDeadState() from LocalPlayer and make its code part of updateStatsDynamic() for simplicity.
ActorDeath packets are sent for dead actors before their StatsDynamic packets. They contain the actor's deathReason in a manner similar to that of PlayerDeath packets.
A future commit will replace the deathReason with a variable named killer which will be an mwmp::Target.
A main priority in TES3MP development is to avoid making major changes to OpenMW code, so as to avoid merge conflicts in the future. Whenever avoiding potential conflicts seems especially difficult for the proper implementation of a particular multiplayer feature, that multiplayer feature is often put off until later or partially implemented with the intent of being revisited in the future.
Container sync is the perfect example. Previously, the OpenMW code for container actions was kept exactly as it was, with clients unilaterally accepting their own container changes as per singleplayer-specific code, with only the addition that clients sent container packets every time they made a change in a container, packets which were then forwarded unquestioningly by the server to other players. This meant that two players clicking on the same item in a container at the same time both managed to take it, thus duplicating the item.
Immediately after the packets were already forwarded, server scripts were able to check for incorrect changes, such as the removal of more items than should have existed in a container, but they had to send their own packets that attempted to fix what had already been accepted on the initial client and then forwarded to all clients, which was quite onerous in some scenarios, such as when a player on a slow connection immediately dropped items in the world after taking them from a container (which is why the default TES3MP serverside scripts made no attempt at sending corrective packets at all, preferring to expect the matter to be solved in a later C++ implementation).
This commit fixes item duping in containers by preventing container actions from initially running on clients and by ending the automatic forwarding of container packets by the server. Instead, clients now send container packets that act as requests for container actions, and serverside scripts have to forward these requests themselves. In other words, without a matching Container event in the server's Lua scripts, players are completely unable to affect containers for themselves or for others.
To forward a received Container packet, the following line must be used in a Container event in the Lua scripts:
tes3mp.SendContainer(true, true)
When an invalid action count is used in a container request, the serverside scripts can amend it using the following new function:
tes3mp.SetReceivedContainerItemActionCount(objectIndex, itemIndex, actionCount)
Thus, the serverside scripts are able to allow only container actions that are correct based on their own recorded contents for that container.
The OpenMW code allowing unilateral container actions in mwgui/container.cpp is now prevented from executing. When a player's container request is returned to them, code in mwmp/WorldEvent.cpp simulates those container actions instead.
Previously, throwing weapon sync was completely broken for players, as the count for their equipped throwing weapons was never set and – as a result – defaulted to a count of 1 on other clients. As a result, any time a player threw a dart, they would then appear as having switched to hand-to-hand for other players.
Moreover, the count of equipped items was mistakenly based on the total count of items with that refId in the inventory. As a result, if – for example – I equipped 1 Daedric Longsword and had 4 others in my inventory, my DedicatedPlayer on other clients would equip a Daedric Longsword with a count of 5. If I was overencumbered by having that many Daedric Longswords on me and then dropped 4 of them, allowing myself to move again, my DedicatedPlayer would still walk around with 5 Daedric Longswords and lack animations due to still being overencumbered on the other clients.
These problems were less prevalent for actors, but their equipment updating code has also been changed to match that of players.
