Typed EventChannels Demo

Overview

Demonstrates using typed EventChannels directly (Float, String, Vector3, Int) without a Variable in between. Where BasicDemo centers on IntVariableSO and only raises IntEventChannelSO as a side effect of a Variable’s value changing, this sample shows each channel type being raised and listened to on its own.

The demo UI has three independent sections:

• Health - FloatEventChannelSO for the current health value, IntEventChannelSO for discrete damage amounts
• Chat - StringEventChannelSO for chat messages
• Movement - Vector3EventChannelSO for position updates, driven by on-screen directional buttons

Features Used

Feature	Asset	Description
Event Channel	OnHealthChanged (FloatEventChannelSO)	Current health value
Event Channel	OnDamageTaken (IntEventChannelSO)	Damage amount taken
Event Channel	OnChatMessage (StringEventChannelSO)	Chat message text
Event Channel	OnPlayerMoved (Vector3EventChannelSO)	Updated position

Architecture

graph LR
    subgraph "Health"
        DB[damage-button] --> HC[HealthController]
        HB[heal-button] --> HC
        HC -->|"RaiseEvent(float)"| FHC[FloatEventChannelSO<br/>OnHealthChanged]
        HC -->|"RaiseEvent(int)"| IDT[IntEventChannelSO<br/>OnDamageTaken]
        FHC --> HD[HealthDisplay]
        IDT --> HD
    end

    subgraph "Chat"
        CI[chat-input] --> CC[ChatController]
        CC -->|"RaiseEvent(string)"| SCM[StringEventChannelSO<br/>OnChatMessage]
        SCM --> CD[ChatDisplay]
    end

    subgraph "Movement"
        MB[move buttons] --> MIU[MovementInputUI]
        MIU --> PMC[PlayerMoveController]
        PMC -->|"RaiseEvent(Vector3)"| VPM[Vector3EventChannelSO<br/>OnPlayerMoved]
        VPM --> PD[PositionDisplay]
    end

Key Insight: Every controller/display pair in this sample communicates purely through a typed EventChannel SerializeField - none of them hold a direct reference to each other, and none of them route through a Variable.

Key Files

File	Description
Scripts/HealthController.cs	Raises FloatEventChannelSO and IntEventChannelSO on damage/heal
Scripts/HealthDisplay.cs	Listens to both health channels and updates a ProgressBar/Label
Scripts/ChatController.cs	Raises StringEventChannelSO from a TextField + Button
Scripts/ChatDisplay.cs	Listens to StringEventChannelSO and appends to a ScrollView log
Scripts/PlayerMoveController.cs	Moves its transform and raises Vector3EventChannelSO
Scripts/MovementInputUI.cs	Directional buttons that call PlayerMoveController.Move()
Scripts/PositionDisplay.cs	Listens to Vector3EventChannelSO and displays coordinates
ScriptableObjects/Events/OnHealthChanged.asset	FloatEventChannelSO for health value
ScriptableObjects/Events/OnDamageTaken.asset	IntEventChannelSO for damage amount
ScriptableObjects/Events/OnChatMessage.asset	StringEventChannelSO for chat text
ScriptableObjects/Events/OnPlayerMoved.asset	Vector3EventChannelSO for position

How to Use

1. Open the TypedEventChannelsDemo scene
2. Enter Play Mode
3. Click Damage / Heal to raise the health channels and watch the bar and log update
4. Type a message in the chat field and click Send to raise OnChatMessage
5. Click a directional button to move the player and raise OnPlayerMoved

Use Cases

• Health/Stat Systems: Float channels for continuous values (HP, stamina, mana)
• Chat/Log Systems: String channels for arbitrary text payloads
• Position/Transform Sync: Vector3 channels for movement, spawn points, waypoints
• Discrete Counters: Int channels for damage, score deltas, item counts