815ce0dec4
Preserve retail AmmoType from CreateObject and port BlocksUseOfShield so bow, caster, and two-handed switches remove incompatible shields, while mismatched missile ammo is also returned to the pack. Each blocker remains server-confirmed before AutoWield re-enters. Co-Authored-By: Codex <codex@openai.com>
115 lines
4.6 KiB
Markdown
115 lines
4.6 KiB
Markdown
# Retail inventory weapon-switch pseudocode
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## Scope
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Inventory double-click of a weapon while another primary weapon is equipped,
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in both peace and combat modes. The UI request sequence is shared; combat-mode
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animation remains server-authoritative.
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## Retail oracle
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- `ItemHolder::DetermineUseResult @ 0x00588460` classifies an owned combat-use
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item as `WieldRight`.
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- `CPlayerSystem::UsingItem @ 0x00562F70` dispatches that result to
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`AutoWield(item, SLOT_SIDE_RIGHT, 0, 1, 0, 1)`.
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- `CPlayerSystem::AutoWield @ 0x00560A60` treats
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`0x03500000` (`MeleeWeapon | MissileWeapon | Held | TwoHanded`) as one
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weapon-ready group. If occupied, it records the requested item, sends the
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blocking weapon to the player container, and does not wield the requested
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item yet.
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- `CPlayerSystem::RecvNotice_ServerSaysMoveItem @ 0x00563260` retries
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`AutoWield` only after the server confirms the blocking item moved.
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- `ACCWeenieObject::UIAttemptWield @ 0x0058D590` sends
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`GetAndWieldItem(item, equipMask)`.
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- `ClientCombatSystem::OnQualityChanged @ 0x0056C1B0` reads player
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PropertyInt 40 (`CombatMode`) and applies it through `SetCombatMode`.
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Addresses are from `docs/research/named-retail/symbols.json`; pseudo-C is in
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`docs/research/named-retail/acclient_2013_pseudo_c.txt`.
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## Cross-reference
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- ACE `Player_Inventory.cs` says the client normally sends the conflicting
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item's dequip before `GetAndWieldItem`. `TryShuffleStance` changes a player
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who is already in combat to Missile, Magic, or Melee after the new item is
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equipped; it leaves a player in peace mode in peace.
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- ACE `Creature_Combat.cs::SwitchCombatStyles` performs the visible
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old-stance -> peace -> new-stance motion chain and sends
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`PrivateUpdatePropertyInt(CombatMode, ...)`.
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- holtburger independently confirms the action/event shapes:
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`GetAndWieldItem { item_guid, equip_mask }`, `WieldObject`, and
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PropertyInt 40 as `CombatMode`.
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## Faithful pseudocode
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```text
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on inventory item double-click(item):
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decision = DetermineUseResult(item)
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if decision is WieldRight or WieldLeft or AutoSort:
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auto_wield(item)
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auto_wield(item):
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if another auto-wield transaction is waiting for the server:
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consume the request without sending another inventory action
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if item has no valid equip location or is already equipped:
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return false
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if item.validLocations intersects WEAPON_READY_MASK:
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desiredMask = item.validLocations & WEAPON_READY_MASK
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blocker = player's equipped item intersecting WEAPON_READY_MASK
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if blocker exists:
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pending = (requestedItem = item.id, blockingItem = blocker.id)
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send PutItemInContainer(blocker.id, player.id, placement = 0)
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return true
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if BlocksUseOfShield(item) and a shield is equipped:
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begin the same confirmed blocker transaction for the shield
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if item.ammoType is not AMMO_NONE
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and equipped ammo has a different ammoType:
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begin the same confirmed blocker transaction for the ammo
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send_wield(item, desiredMask)
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return true
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use the existing retail slot/auto-wear selection rules
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send_wield(item, selectedMask)
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on server-confirmed item move(blocker):
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if blocker matches pending.blockingItem
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and blocker is now loose in the player's main pack:
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requested = pending.requestedItem
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clear pending before re-entry
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auto_wield(requested)
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on server inventory-request failure(item, error):
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if item matches pending.blockingItem or pending.requestedItem:
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clear pending
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send_wield(item, mask):
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update the retained inventory/paperdoll projection optimistically
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send GetAndWieldItem(item.id, mask)
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on PrivateUpdatePropertyInt(property = CombatMode, value):
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if value is exactly NonCombat, Melee, Missile, or Magic:
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CombatState.SetCombatMode(value)
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```
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## Animation ownership
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The client must not synthesize a local bow-to-sword animation. In peace mode,
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ACE leaves `CombatMode` as `NonCombat`. In combat mode, ACE selects the new
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weapon's stance and sends the authoritative motion stream plus PropertyInt 40.
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The inventory controller only sequences the two wire requests and waits for
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the old weapon's confirmed move; the existing motion and equipped-child
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render paths consume the server events.
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## Known remaining retail surface
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This port covers the primary weapon-ready group plus retail's secondary
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incompatible-shield and mismatched-ammo blockers. `CreateObject` now retains
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the exact `AmmoType` needed for those decisions. Full `AutoWieldIsLegal`,
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Aetheria, and dual-wield/off-hand rules remain tracked by divergence row
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AP-108.
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