Haunted Harpist Fix

A lightweight, automated BepInEx preloader patch for Bob123's Haunted Harpist (Haunted_Harpist) ensuring full compatibility with modern Lethal Company versions (v60+).

What It Fixes

Haunted_Harpist v1.3.24 targets older Lethal Company releases and crashes in recent versions due to base-game binary changes:

1. PlayerControllerB.HasLineOfSightToPosition (RPC Fear Calculation):

   • Problem: Lethal Company added a 5th parameter (int layerMask) to HasLineOfSightToPosition. In unpatched versions, whenever a player looks at or is targeted by a Harp Ghost or Enforcer Ghost, an unhandled RPC exception (MissingMethodException) is thrown.
   • Fix: Automatically updates the call to pass layerMask = -1 (default full mask) and resolves the active method signature.

2. EnemyAI.EnableEnemyMesh (Bagpipes Ghost Spawn):

   • Problem: Lethal Company added a 3rd parameter (bool tamperWithMeshes) to EnableEnemyMesh. In unpatched versions, the Bagpipes Ghost crashes upon spawning.
   • Fix: Automatically updates the call to pass tamperWithMeshes = false and targets the 3-parameter overload.

3. EntranceTeleport.exitPoint (Door Escape Navigation):

   • Problem: The base-game EntranceTeleport.exitPoint field was removed/refactored, causing MissingFieldException during Bagpipes Ghost AI intervals and escape door calculations.
   • Fix: Retargets the navigation instructions to read the valid entrancePoint field.

How It Works

This mod runs as a BepInEx preloader patcher. At game startup, it scans for LethalCompanyHarpGhost.dll and applies the IL patch in-place before plugins are loaded into memory:

• Fully automated—no manual file editing or decompilation required.
• Automatically creates a .orig backup of the unpatched binary.
• Survives mod updates and reinstalls.

Changelog

[1.0.1] - 2026-09-18

• Fixed MissingMethodException on EnemyAI.ChooseFarthestNodeFromPosition(Vector3, bool, int, bool, int, bool -> int capDistance = -1) for BagpipesGhostAIServer.
• Fixed file sharing violation on preloader file overwrite during game startup.

[1.0.0] - 2026-09-17

• Initial release.
• Fixes MissingMethodException on PlayerControllerB.HasLineOfSightToPosition (5th layerMask argument).
• Fixes MissingMethodException on EnemyAI.EnableEnemyMesh (3rd tamperWithMeshes argument).
• Fixes MissingFieldException on EntranceTeleport.exitPoint (redirected to entrancePoint).
• Automated preloader scan and patch with .orig backup preservation.