Interaction System Plugin

A clean, fully replicated interaction system for Unreal Engine 5.

Add the component to your player and start interacting with the world. Includes built-in prompts, hold interactions, progress feedback, and notifications.

Features

• Player UInteractComponent with line trace detection
• UInteractableComponent supporting Press and Hold interactions (with progress)
• Ready-to-use ABaseInteractable actor base class
• Built-in interaction prompt system (on-screen "Press E to...")
• InteractionNotificationSubsystem for temporary messages
• Hold progress tracking (replicated)
• Server-authoritative interactions
• Full multiplayer support
• Rich Blueprint delegates
• No dependencies

Installation

1. Create folder Plugins/InteractionSystemPlugin in your project
2. Copy the plugin files from this repo into it
3. Enable the plugin in the Editor
4. Restart Editor

Quick Start

1. Add Interact Component to your Character
2. In your Character Blueprint, on PossessedBy, call Initialize on the component
3. Add Interactable Component to any Actor you want to make interactive (or inherit from BaseInteractable)
4. Bind your "Interact" input action → call TryInteract() on the Interact Component
5. Customize interaction text, hold time, and visuals directly in the Interactable Component

Delegates (bind in Character or Widgets)

• OnFocusedInteractableChanged → Update prompt UI
• OnInteractStart → VFX, sounds, animations
• OnInteractComplete → Main interaction logic
• OnInteractProgress → Hold progress bar
• OnInteractCancel → Cancel feedback

About

A fully replicated, plug-and-play interaction system designed for easy extension and multiplayer games.