Finite State Machine - GDevelop Extension

This extension adds two powerful Finite State Machine (FSM) behaviors to GDevelop. Manage the logic of individual object instances with the standard FSM Behavior, or maintain a persistent state across all your scenes with the Global FSM Behavior. Cleanly manage complex logic for AI, players, UI, and even game-wide systems without creating complicated event sheets.

Features

• Independent State Machines: Every object instance runs its own FSM, perfect for managing multiple enemies or interactive elements simultaneously. 
• ✨ NEW: Global State Machine: A Finite State Machine (FSM) that maintains its state across scenes. Use it to manage persistent object states and transitions, ideal for creating game-wide managers, tracking character statuses between levels, or handling multi-scene quest logic.
• Easy Management: Set up and manage all your states directly from the behavior's properties panel.
• Sequential Transitions: Easily cycle through states with "Next state" and "Previous state" actions. Includes an optional looping feature, making it perfect for creating intuitive menus and selection screens.
• Flexible Control: Change the state at any time by referencing its name (e.g., "attack") or its index number.

Actions, Conditions & Expressions

These behaviors come with a complete set of functions to integrate into your event sheets:

• (Action) Set state by index
• (Action) Set state by name
• (Action) Next state
• (Action) Previous state
• (Condition) Is state
• (Expression) GetStateIndex
• (Expression) GetStateName

License

This extension is provided under a simple and permissive license.

You are free to:

• Use this extension in any of your projects, personal or commercial.
• Modify the source code to fit your specific needs.
• Use it without giving any credit or attribution (though a shout-out is always appreciated!).

The only restriction is:

• You are not allowed to resell, redistribute, or re-package this extension as a standalone asset.

💖 Supporter Edition 💖

Love this extension? This version is for you!

It's functionally identical to the free one, but with some fun emojis ✨ in the editor descriptions. By choosing this edition, you're supporting my work and helping me create more tools for the GDevelop community.

Thank you for your amazing support!