Automobility Fix

About

Automobility Fix is an unofficial addon for Automobility on NeoForge 1.21.1. It fixes long-standing bugs in Automobility 0.5.0.h and makes vehicles behave properly on multiplayer servers with claim and team mods.

It is an addon, not a replacement: it contains no Automobility code. Install it next to the original Automobility, on both the server and the client.

Fixes

Hitboxes

• No more "ghost" vehicles that can't be entered after rejoining or after a chunk reloads.
• No more invisible, permanent obstacles left behind where a vehicle used to be.
• Old broken hitboxes already saved in your world are cleaned up automatically.

Physics

• Vehicles no longer get flung into the air at chunk borders, on step edges or when several vehicles collide in tight spaces.
• Fixed wrong block detection at negative coordinates.
• Invalid (NaN) physics values are cleaned up, which removes AABB errors and vehicles disappearing or rendering broken.

Items and menus

• Fixed item duplication through trunks and other attachment menus: menus now close before the items drop when a vehicle or attachment is destroyed, and when you walk away.

Crashes

• Fixed the Auto Mechanic Table crashing when hovering an empty recipe category (e.g. when a modpack removes recipes).
• Fixed a render crash with the autopilot attachment.

Autopilot

• Vehicles on autopilot stop before unloaded chunks instead of falling through the world or vanishing.

Vehicle ownership

• The player who assembles or places a vehicle becomes its owner.
• The owner's whole team counts as owners too: FTB Teams party or Open Parties and Claims party (team allies are optional).
• Other players can't get in, drive, open the trunk or dismantle the vehicle — anywhere, not only inside claims.
• The owner and their team can use their vehicle even inside other players' claims (OPAC and FTB Chunks). All other claim rules stay unchanged.
• Vehicles placed before installing the addon have no owner and keep working as before.

Claim mod compatibility

Open Parties and Claims

• Fixed vehicles appearing duplicated at claim borders (one inside, one outside).
• A claim barrier no longer throws the driver out of the vehicle; the vehicle stops at the border instead.
• Protection checks use the vehicle itself, so automobility:automobile is all you need in OPAC configs (no more automobility:hitbox).

FTB Chunks

• Protection checks use the vehicle and the chunk it is actually in, not its hitbox.

FTB Teams

• Team members share ownership of vehicles.

All integrations are optional and only activate when the corresponding mod is installed.

Configuration

Server config: config/automobility_fix-server.toml

The same file also has physics limits (collision impulse, max added velocity), the unloaded-chunk guard and the claim-mod integration options.