Collision

Category: Listener Tier: Basic

Purpose

Detects collisions and overlaps with other physics objects, with filtering by name, group, material, or property.

Visual Reference

As added to your scene

When To Use

• Damage on collision (player hits enemy)

• Pickup items (player touches collectible)

• Trigger zones (enter area to open door)

• Ground detection (character on floor)

• Projectile hits (bullet collides with wall)

• Power-up effects (player touches speed boost)

Runtime Behavior

Triggers: When this object collides with another object that matches the specified filter criteria

Generated UI Mockup — showing expanded properties

Collision

-

x

Name:

Label this brick...

Type:

Any

Target:

v

Value:

v

Expose Scope:

Local

Expose Prefix:

collision

v

Expose Data

Invert

Properties

Property	Type	Default	Notes
Type	option	Any	What to check on collision
Target	string		Name/Group/Material/Property to match
Value	string		Expected property value (empty = just check existence)
Expose Data	bool	False	Write collider name, group, position, normal, and count into variables when the listener fires
Expose Scope	option	Local	Where exposed collision variables are written
Name Var	variable_name		Variable that receives the first matching collider name
Group Var	variable_name		Variable that receives the matched collider group
Position Var	variable_name		Variable that receives collision position/contact point
Normal Var	variable_name		Variable that receives collision normal
Count Var	variable_name		Variable that receives matching collision count
Active Var	variable_name		Variable that receives raw colliding state
Expose Prefix	string	collision	Compatibility fallback when explicit output variables are empty

Example Use Cases

Basic Damage Detection:

Collision(type=Any) -> AND -> Math(HP, Subtract, 10)
// Lose 10 HP when hitting anything

Pickup System:

Collision(type=Group, target=Collectibles) -> AND -> Sound(pickup) + Visibility(false)
// Play sound and hide item when player touches collectible

Enemy-Specific Damage:

Collision(type=Group, target=Enemies) -> AND -> Math(HP, Subtract, 25)
// Take 25 damage only from enemies

Ground Detection:

Collision(type=Property, target=is_ground, value=true) -> AND -> Property(grounded, Set, true)
// Set grounded=true when touching ground

Trigger Zone:

Collision(type=Object Name, target=Player) -> AND -> Message(door_open)
// Send door_open message when player enters zone