Unity Physics and Animation Flashcards

Which component must be attached to a GameObject to enable Unity's physics simulation on it?

Answer: Rigidbody

The Rigidbody component enables physics simulation, allowing GameObjects to respond to gravity, forces, and collisions.

What is the primary purpose of a Collider component in Unity?

Answer: To define the physical shape for collision detection

Colliders define the physical shape used for collision detection and are separate from the visual mesh.

Which Unity physics method should be used to move a Rigidbody in a physics-safe way each fixed frame?

Answer: MovePosition() in FixedUpdate()

MovePosition() called inside FixedUpdate() ensures physics-safe movement synchronized with the physics engine.

In Unity's Animation system, what is an Animator Controller used for?

Answer: Managing state machines and transitions between animations

An Animator Controller manages the state machine that controls which animation clips play and when transitions between them occur.

What does the 'Is Trigger' checkbox on a Collider do?

Answer: Makes the collider detect overlaps without physical collision response

Marking a Collider as a trigger allows it to detect overlapping objects via OnTriggerEnter/Exit without generating a physical collision response.

Which Animation blend tree type is best suited for blending directional movement (e.g., walk forward/back/left/right)?

Answer: 2D Freeform Directional Blend Tree

A 2D Freeform Directional Blend Tree blends animations based on two float parameters, making it ideal for directional locomotion.