Unreal Engine Blueprints Blueprint Physics and Collision 3

Question 1

Which Blueprint node performs a single-hit line trace and returns the first blocking hit along a ray?

Accepted Answer

Line Trace By Channel

Answer

Line Trace By Channel casts a ray from a start to an end point and returns the first blocking hit result for the specified collision channel.

Question 2

What information does 'Break Hit Result' expose when connected to a line trace output?

Accepted Answer

Hit location, impact normal, hit actor, hit component, physical material, and more

Answer

Break Hit Result decomposes the Hit Result struct into all its member fields, including impact point, normal, distance, hit actor, hit component, physical material, and bone name.

Question 3

What does Continuous Collision Detection (CCD) primarily prevent in Unreal Engine physics?

Accepted Answer

Fast-moving objects tunneling through thin geometry

Answer

CCD uses sub-step collision checks to prevent high-velocity physics bodies (like bullets) from passing through thin walls without registering a hit.

Question 4

When using 'Line Trace By Channel' in Blueprint, what does returning 'false' from the node indicate?

Accepted Answer

The trace did not hit any blocking object

Answer

Line Trace By Channel returns false when the trace did not encounter any blocking collision along its path from start to end.

Question 5

Which Blueprint component is used to create a physics joint between two actors or components?

Accepted Answer

Physics Constraint Component

Answer

The Physics Constraint Component acts as a joint between two physics bodies, allowing you to configure linear and angular limits, drives, and breaking thresholds.

Unreal Engine Blueprints Practice Test

Unreal Engine Blueprints Practice Test

Unreal Engine Blueprints Blueprint Physics and Collision 3