InputActionAsset

InputActionAsset is a Unity class in the UnityEngine.InputSystem namespace that represents a collection of input actions used by the new Input System. It is a ScriptableObject asset that stores one or more input action maps, each containing actions and their bindings to controls such as keyboards, mice, gamepads, and touch devices.

The asset’s structure centers on action maps, which group related actions for a particular context or device. Each InputAction within a map defines a specific input, and bindings describe which controls can trigger that action. Bindings can be configured to support multiple devices and control schemes, enabling flexible input configurations for different platforms.

Editor use and generation: InputActionAsset is created and edited in the Input Actions editor. It is saved as a project asset with a .inputactions extension and can be configured to expose a C# class that provides strongly typed access to actions, improving developer ergonomics when writing input-handling code.

Runtime usage: At runtime, an InputActionAsset can be enabled or disabled, which enables or disables all contained maps and actions. It can be referenced directly from scripts, assigned to a PlayerInput component, or used with other parts of the Input System. You can locate specific maps or actions by name via FindActionMap and FindAction.

Persistence and sharing: As a ScriptableObject asset, InputActionAsset can be reused across scenes and shared between components. This makes it convenient to implement consistent input configurations across an application or project.

Notes: While primarily editor-driven, the asset is designed to be durable at runtime, supporting dynamic input handling and cross-device control schemes without requiring code changes.