Interaction Engine Open Docs

Component-based interaction plugin

A complete gameplay interaction system for Unreal Engine.

Build interaction prompts, holds, mashes, hits, foliage actions, gamepad-friendly UI, multiplayer validation, and save/load workflows from one Blueprint-friendly system.

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Includes setup guides, Blueprint workflows, reference pages, and troubleshooting for real production cases.

Component-based Add an Interactor to the player and Interactable Components to gameplay actors.
Interaction styles Tap, Hold, Mash, Multi-Hit, Toggle, and damage-based interactions in one system.
Gamepad-ready Keyboard, mouse, and gamepad support with configurable input glyph styles.
Custom widgets Build multi-slot prompts with reusable focus widgets, row widgets, and progress updates.
Foliage support Interact with instanced foliage through virtual focus and proxy actors.
Multiplayer flow Responsive local prediction with server-authoritative validation and confirmed events.
Save / Load Persist interactables, foliage proxy state, hidden instances, cooldowns, and runtime data.
Optimized C++ core Performance-focused internals exposed through a Blueprint-friendly workflow.

Documentation

Documentation aligned with the current plugin architecture.

The docs cover setup, Blueprint workflows, interaction modes, gamepad glyphs, custom widgets, foliage, multiplayer, persistence, references, and troubleshooting.

Start here Getting Started

Install the plugin, add the required components, and create the first working interaction loop.

 Blueprint focus Blueprint Workflow

Recommended Blueprint patterns for interactors, interactables, events, slots, and runtime logic.

 Gameplay patterns Interaction Modes

Tap, Hold, Toggle, Multi-Hit, Button Mash, and damage-based interaction behavior.

 Input UX Input Glyphs

Enhanced Input action resolution, keyboard/mouse prompts, and configurable gamepad glyph styles.

 Presentation UI and Feedback

Custom interaction widgets, row widgets, progress bars, outlines, sounds, particles, and notifications.

 Instanced worlds Foliage

Virtual foliage focus, proxy actors, source instance visibility, lifecycle control, and foliage debugging.

 Networked gameplay Multiplayer

Local prediction, server validation, confirmed events, rejection reasons, and replicated runtime state.

 Persistence Save / Load

Persist interactables and foliage proxy state with the recommended world-level snapshot flow.

 Debugging Troubleshooting

Practical checks and debug CVars for focus, validation, networking, foliage, glyphs, widgets, and save/load.

 Full tree Documentation Hub

Open the full docs tree and navigate every guide and reference page.
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