# Landtrain

Landtrain extends Towbars to support chained towing.

## Important

Project Zomboid base `BaseVehicle.addPointConstraint()` force-breaks existing constraints.
To keep `1 -> 2` while attaching `2 -> 3`, Landtrain includes a Java class override:

- `zombie/vehicles/BaseVehicle.class`

This is the same override pattern used by mods like Realistic Car Physics (manual `zombie` folder copy).

## Apply patch to game

1. Run:

```powershell
.\tools\patch-game-basevehicle.ps1
```

2. Ensure both mods are enabled:
   - `hrsys_towbars`
   - `hrsys_landtrain`

## Restore vanilla class

```powershell
.\tools\restore-game-basevehicle.ps1
```