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Lavaarena Firebomb

Based on game build 714014 | Last updated: 2026-03-05

Overview​

The lavaarena_firebomb prefab defines a throwable weapon used during the Lava Arena event. It is a character-held item that integrates with the aoetargeting component to provide a radial area-of-effect targeting reticule for placement. Upon activation, it spawns a projectile entity which triggers an explosion on impact. The prefab includes several associated FX prefabs (projectile, explosion, procedure FX, and sparks) used during its lifecycle.

This prefab does not define a standalone component class. Instead, it is a prefab definition that configures default entity properties and attaches components via inst:AddComponent("aoetargeting"). As such, it is intended for use as an inventory item in the Lava Arena challenge mode.

Usage example​

local firebomb = SpawnPrefab("lavaarena_firebomb")
firebomb.Transform:SetPosition(x, y, z)
firebomb:Remove() -- remove when done, e.g. when discarding or using

Dependencies & tags​

Components used: aoetargeting (attached and configured in constructor)
Tags added: throw_line, weapon, rechargeable
Tags removed: None
Tags checked: None

Properties​

No public properties are defined in the constructor for direct external modification. Reticule behavior is configured via the aoetargeting component's reticule subtable (e.g., reticuleprefab, targetfn), but these are initialized internally and not exposed as instance properties on the firebomb prefab itself.

Main functions​

No custom main functions are defined on the firebomb prefab entity. Reticule placement is handled by the aoetargeting component's SetTarget and OnUse workflows (see aoetargeting.lua). The reticule.targetfn is set to the ReticuleTargetFn helper (see below) which computes the valid ground target location.

ReticuleTargetFn()​

  • Description: Helper function used as the targetfn for the AOE reticule. Casts a ray from the player forward to find the nearest valid ground position within casting range (max 5 units), ensuring it is passable and not blocked by terrain or structures.
  • Parameters: None.
  • Returns: Vector3 — the target ground position, or a zero vector if no valid point is found.

Events & listeners​

  • Listens to: None (the prefab does not register event listeners directly).
  • Pushes: None (no events are explicitly pushed by the prefab itself; event handling occurs in post-init functions event_server_data(...).firebomb_postinit and component-level logic).

Note: Entity-specific behavior (e.g., projectile spawn, explosion logic) is deferred to event_server_data(...).firebomb_postinit, projectile_postinit, explosion_postinit, procfx_postinit functions defined in the event_server_data namespace. These are not included in the source file provided.