HauntedHarpistFix

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:

• 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.

• 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.

• 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.

• EnemyAI.ChooseFarthestNodeFromPosition (AI Node Navigation):
• Problem: Lethal Company changed the 6th parameter of ChooseFarthestNodeFromPosition from bool to int capDistance = -1. In unpatched versions, BagpipesGhostAIServer.DoAIInterval and SwitchBehaviourStateLocally throw MissingMethodException.
• Fix: Automatically updates the call to pass capDistance = -1 and resolves the active 6-parameter method signature.

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.