Lingering Potion

Registry name

etfuturum:lingering_potion

Audit correction: previously written as etfuturum.lingeringPotion. Evidence: core/proxy/CommonProxy.java:241 registerEntity(EntityLingeringPotion.class, "lingering_potion", 6, ...)

Basic info

• Health: Not applicable (projectile)
• Armor: None
• Size: Inherited from EntityPotion (splash potion base)
• Spawn conditions: Thrown by player using a lingering potion item
• Drops: None (dissipates on impact)
• Behaviour: Throwable potion that creates a lingering area-of-effect cloud on impact. Cloud applies the potion effect to all entities within range.

Impact mechanics

On onImpact(MovingObjectPosition):

1. Spawns EntityLingeringEffect at the impact point
2. Plays splash sound (2002 aux magic number)
3. Marks entity as dead

Potion data

• Stores ItemStack of the potion item (with damage value encoding the potion type)
• Full NBT persistence: writes "Potion" compound to NBT
• If stack is null on load → entity dies immediately

IEntityAdditionalSpawnData

• writeSpawnData / readSpawnData: serialises the ItemStack using ByteBufUtils.writeItemStack / readItemStack
• Used for multiplayer sync

Relationship to splash potion

• Extends EntityPotion (splash potion entity)
• Splash potion impacts immediately; lingering creates the effect cloud
• The cloud entity (EntityLingeringEffect) is responsible for the actual AoE application

Notes

• EntityPotion base handles the thrown potion physics and rendering
• This entity only overrides the impact behavior to spawn the lingering effect cloud
• worldObj.isRemote guard on onImpact ensures effect only spawns server-side

Configuration gate

• Entity registration (lingering_potion and the companion lingering_effect, id 7): ConfigBlocksItems.enableLingeringPotions, default ON (configuration/configs/ConfigBlocksItems.java). lingering_effect has no wiki entry — it is a registered entity that is currently uncovered.