Radar

Category: Listener Tier: Basic

Purpose

Detects objects within a cone-shaped field of view (FOV), like a radar or vision cone.

Visual Reference

As added to your scene

When To Use

1. Enemy AI Vision Cone

Radar Listener (Angle: 60 deg , Distance: 15.0, Group: "player", Expose Data: true)
-> AND Gate
-> Animation Executor (Play: "alert")
-> Property Executor (Set Global "enemy_alerted" = true)

Enemy detects player when in 60 deg FOV, plays alert animation.

2. Security Camera

Radar Listener (Angle: 90 deg , Distance: 20.0, Axis: +Z, LOS: true, Group: "intruders")
-> AND Gate
-> Sound Executor (Play: "alarm.wav")
-> Message Executor (Send: "INTRUDER_DETECTED")

Camera detects intruders in its cone, triggers alarm.

3. Stealth Game - Stay Out of Sight

Radar Listener (Angle: 90 deg , Distance: 10.0, Target: "Player", Invert: true)
-> AND Gate
-> Property Executor (Set Global "is_hidden" = true)

Check if player is NOT in guard’s vision (stealth success).

4. Auto-Aim System

Radar Listener (Angle: 30 deg , Distance: 50.0, Group: "enemies", Expose Data: true)
-> Expression Gate (radar_count > 0)
-> Track To Executor (Target: from Local Variable "radar_closest")

Turret aims at nearest enemy in narrow cone.

5. Peripheral Vision (Wide Cone)

Radar Listener (Angle: 180 deg , Distance: 5.0, Target: "Enemy")
-> AND Gate
-> PRINT Executor ("Enemy behind me!")

Detect enemies in 180 deg hemisphere (front half).

Runtime Behavior

Evaluates: TRUE when any/specific object is within the detection cone

Generated UI Mockup — showing expanded properties

Radar

-

x

Name:

Label this brick...

Target:

Any

Obj Name:

v

Group:

v

Prop:

v

Value:

v

Axis:

+Z

Scope:

Local

Prefix:

radar

v

Angle

90.0

v

Dist

20.0

v

LOS

Expose

Verbose

Invert

Properties

Property	Type	Default	Notes
Target	option	Any	Detection filter
Obj Name	string		[Object Name] Name of specific object
Group	string		[Group] Group name to detect
Prop	string		[Property] Metadata property name
Value	string		[Property] Expected property value
Axis	option	+Z	Cone direction (local axis)
Angle	float	90.0	FOV cone angle in degrees
Dist	float	20.0	Maximum detection range
LOS	bool	True	Require clear raycast (Line of Sight)
Expose	bool	True	Store radar detection data in variables
Scope	option	Local	Where exposed radar variables are written
Count Var	variable_name		Variable that receives detected object count
Closest Var	variable_name		Variable that receives the closest object name
Dist Var	variable_name		Variable that receives closest object distance
Angle Var	variable_name		Variable that receives closest object angle
List Var	variable_name		Variable that receives detected object names
Prefix	string	radar	Compatibility fallback when explicit output variables are empty
Invert	bool	False	Trigger when NO objects detected
Verbose	bool	False	Log detection results each tick via ladybug