State machines for AI behavior in Unity - Cheat Sheet & Quick Revision

Recall & Review

beginner

What is a state machine in AI behavior?

A state machine is a way to organize AI behavior by defining different states and rules to switch between them. It helps AI decide what to do next based on its current situation.

beginner

Name three common states in an AI enemy's state machine.

Common states include: Idle (waiting), Patrol (moving around), and Attack (engaging the player).

intermediate

How does a state machine improve AI behavior in games?

It makes AI predictable and organized, so the AI can react properly to different situations by switching states smoothly.

intermediate

In Unity, what component or script structure is commonly used to implement state machines for AI?

Developers often use C# scripts with enums or classes to represent states and switch logic inside the Update() method or coroutines.

beginner

What triggers a transition between states in a state machine?

Transitions happen when certain conditions or events occur, like spotting the player, losing sight, or reaching a destination.

What does a state machine primarily help an AI do?

A Save game progress

B Increase the AI's speed

C Organize different behaviors and switch between them

D Make the AI invisible

A state machine organizes AI behaviors into states and controls switching between them.

Which of these is NOT a typical AI state?

A Idle

B Patrol

C Attack

D Sleep

Sleep is usually not a common AI state in games; Idle, Patrol, and Attack are typical.

In Unity, where is state switching logic usually placed?

A In the Start() method only

B Inside the Update() method

C In the OnDestroy() method

D In the Awake() method only

Update() runs every frame, making it ideal for checking conditions and switching states.

What triggers a state transition in an AI state machine?

A A condition or event like spotting the player

B Random chance only

C User input only

D Time of day only

Transitions happen when specific conditions or events occur, such as spotting the player.

Why is using a state machine better than writing all AI behavior in one big script?

A It keeps behavior organized and easier to manage

B It makes the AI run faster

C It uses less memory

D It removes bugs automatically

State machines organize behavior into clear states, making code easier to read and maintain.

Explain how a state machine controls AI behavior in a game.

Think about how AI decides what to do next.

Describe how you would implement a simple AI state machine in Unity using C#.

Focus on how the code checks and changes states.