Door Unlock From Inside
Restores vanilla door behavior in B42 multiplayer: doors auto-unlock when you are inside the building.
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Problem
In Build 42 multiplayer, doors sometimes stay locked even when the player is standing inside the house. The vanilla "open from inside" auto-unlock behavior fails due to client-server desync, effectively trapping players in their own houses.
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Fix
Two-pronged approach:
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[*] [b]Periodic scan + server unlock[/b] — Every 0.5s, scans 3-tile radius around player. If player is indoors (isOutside=false), requests server to unlock nearby doors.
[*] [b]ISOpenCloseDoor hook[/b] — Intercepts the door-open action just before it runs. If player is indoors, force-unlocks the door on the fly. This bypasses any server-side re-locking.
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Features
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[*] Works even when [b]getRoom()[/b] returns nil (map mod issues)
[*] Uses [b]isOutside()[/b] for reliable indoor detection
[*] Only works when player is indoors — outdoor locked doors stay locked (preserves "break in" gameplay)
[*] Handles both [b]IsoDoor[/b] and [b]IsoThumpable[/b] doors (player-built)
[*] Server-authoritative unlock with broadcast to all clients
[*] Lightweight: 0.5s scan interval, 5s request cooldown per coordinate
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Update Log
v5
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[*] Added [b]ISOpenCloseDoor:perform hook[/b] — force-unlocks door at the moment of interaction (bypasses server re-lock)
[*] Server broadcasts unlock to all clients for local state sync
[*] Both client-side polling and hook work together for reliability
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v4
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[*] Moved to server-authoritative unlock via [b]sendClientCommand[/b]
[*] Removed hasLockedDoor check (client-server desync could hide locked state)
[*] 5-second cooldown per door coordinate to prevent spam
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v3
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[*] Added [b]isOutside()[/b]-based indoor detection (fallback when getRoom/getBuilding return nil)
[*] Boundary-door check (only unlock doors between indoor and outdoor squares)
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v2
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[*] Switched from getRoom() to getBuilding()
[*] Expanded scan to include doorway edge tiles
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v1
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[*] Initial release
[*] getRoom()-based indoor detection
[*] Client-side setLocked(false) on nearby doors
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Compatibility
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[*] Build 42.13+ (SP/MP)
[*] Works with any map mod
[*] Compatible with Authentic Z, True Music, EURY Multiplayer Bug Fixes
[*] No mod dependencies
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Developed by [b]$J[/b]
Workshop ID: 3712058921
Mod ID: DoorUnlockFromInside
