Unity Physics and Animation Flashcards

What is the difference between a Static Collider and a Dynamic Collider in Unity?

Answer: Static colliders have no Rigidbody and don't move; dynamic colliders have a Rigidbody and can move

Static Colliders lack a Rigidbody and are intended for immovable geometry, while Dynamic Colliders have a Rigidbody and participate fully in physics simulation.

In Unity's Animator, what is an 'Avatar' used for?

Answer: Mapping a humanoid skeleton to Unity's standard bone structure for retargeting animations

An Avatar maps a model's skeleton to Unity's humanoid rig definition, enabling animation retargeting between different humanoid characters.

Which Rigidbody property controls how much air or fluid resistance is applied to slow linear motion?

Answer: Drag

The Drag property applies linear resistance to a Rigidbody, simulating air or fluid friction slowing down linear movement.

What does the Physics.Raycast() function return in Unity?

Answer: A boolean indicating whether the ray hit a collider, plus hit information

Physics.Raycast() returns true if the ray intersects a collider and fills a RaycastHit struct with details about the hit point, normal, and object.

In Unity animation, what is the purpose of an Animation Layer?

Answer: To stack multiple independent animation state machines that can blend or override each other

Animation Layers allow you to run separate state machines simultaneously, such as playing an upper-body reload animation while lower-body locomotion continues.

Which collision detection mode should you use for fast-moving Rigidbodies to prevent tunneling through thin objects?

Answer: Continuous

Continuous collision detection tests the object's swept volume between frames, preventing fast-moving objects from tunneling through thin colliders.