[Actor] Radioactive Zone

Overview

A_RadioactiveZone is an Actor Blueprint designed to represent a radioactive area within the game world. It detects when other actors enter or leave its spherical boundary and communicates these events to the actors' Radioactivity components, enabling dynamic radiation effects. Additionally, it visually represents the radioactive zone using a Decal component, which can be scaled and customized based on the radiation radius. The Blueprint also includes a function to calculate the radiation intensity affecting a given actor based on their position within the zone.

Variables

Variable Name	Type	Purpose	Usage Notes
ShowRadiationDebug	Boolean	Toggles the visibility or debugging display of the radioactive zone's visual elements.	Used in ConstructionScript to conditionally show debug visuals. Not used in runtime graphs.
LowRadValue	Float	Represents the minimum radiation intensity within the zone.	Defined but not actively used in current graphs. Possibly intended for radiation calculation.
HighRadValue	Float	Represents the maximum radiation intensity within the zone.	Defined but not actively used in current graphs. Possibly intended for radiation calculation.
RadiationRadius	Float	Defines the effective radius of the radioactive zone's spherical detection area.	Used in ConstructionScript to set the Sphere component radius.
Falloff	Float	Determines how radiation intensity decreases from the center to the edge of the zone.	Defined but not actively used in current graphs. Intended for radiation value calculations.
RadiationCoreThickness	Float	Specifies the thickness of the central core area with maximum radiation.	Defined but not actively used in current graphs. Intended for radiation gradient.
MID_Debug	Material Instance Dynamic	Holds a dynamic material instance for debug visualization of the radioactive zone.	Defined but not actively used in current graphs. Likely for future debug material control.

Components

Component Name	Type	Description
Root	SceneComponent	The root component serving as the parent for all other components in this Actor.
Sphere	SphereComponent	Defines the collision and detection boundary of the radioactive zone.
Decal	DecalComponent	Visual representation of the radioactive zone on surfaces, scaled according to radiation radius.
Billboard	BillboardComponent	Editor-only visual aid to help locate and identify the radioactive zone in the editor viewport.

Event Graph

On Component Begin Overlap (Sphere)

Purpose: Detects when another actor enters the radioactive zone's spherical boundary.
Behavior:
- Retrieves the Radioactivity component from the overlapping actor.
- If the Radioactivity component is valid, calls EnteredRadioactiveZone on it, passing references to itself and the radioactive zone.
Effect: Notifies actors entering the zone so they can respond to radiation exposure.

On Component End Overlap (Sphere)

Purpose: Detects when another actor leaves the radioactive zone's boundary.
Behavior:
- Retrieves the Radioactivity component from the exiting actor.
- If valid, calls LeftRadioactiveZone on it, passing references to itself and the radioactive zone.
Effect: Notifies actors leaving the zone to potentially stop radiation effects.

Overview

Variables

Components

Event Graph

On Component Begin Overlap (Sphere)

On Component End Overlap (Sphere)

Functions