Interactive Door Framework

A comprehensive Unreal Engine 5 plugin providing production-ready door interaction systems with particular focus on high-standard implementation driven by both skeletal mesh animations and physics.

Developed to address common interaction system requirements encountered in professional contexts, this framework offers a definitive solution that addresses both programmers' and designers' needs. The skeletal mesh-based approach ensures precise, high-quality standards with versatile use cases.

Team Size: Solo Developer
Development Time: October - November 2024
Technology: Unreal Engine 5.6 / C++
Type: Plugin Framework
View on GitHub Itch.io

Core Features

  • Modular Component Architecture: Flexible gameplay configurations without code modification
  • Physics-Animation Integration: Seamless transitions between physics-based and animation-driven states
  • Lock & Key System: Comprehensive key management with one-sided locks and collectible items
  • Blueprint Accessibility: Designer-friendly interfaces for complete customization
  • Navigation Mesh Integration: Dynamic nav obstacle updating for AI pathfinding (v1.1)
  • UI/HUD System: 3D world prompts, status messages, and item descriptions

Technical Implementation

The framework features a modular class structure with a base interactable class hierarchy that allows generic implementation for doors, key items, documents, and movable objects. The IDFDoorActor core class contains all primary interaction logic, physics calculations, and animation management.

Key components include:

  • IDFDoorActor - Base C++ logic for physical and animated door interaction
  • IDFLockComponent - Manages lock state and key item verification
  • IDFPlayerInteractionComponent - Detects interactables and handles input
  • KeyItemsManager - Subsystem tracking collected keys game-wide
  • IDFInteractionPromptActor - 3D prompt display system

Development Challenges

Balancing Flexibility with Polish: Creating a system flexible enough for various use cases while maintaining detailed functionality required careful consideration of both programming and game design aspects.

Physics-Animation Integration: Required deep understanding of Unreal Engine's physics system and coding implementation to achieve seamless transitions between states.

Architecture Design: Developing a centralized architecture that could accommodate a wide variety of possible uses while keeping the class structure clean and maintainable.

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