Enemy patrol and chase patterns in Unity - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to make the enemy move between two points.

Unity

Vector3 targetPosition = points[[1]].position;
transform.position = Vector3.MoveTowards(transform.position, targetPosition, speed * Time.deltaTime);

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A2

B1

C0

D3

Attempts:

3 left

💡 Hint

Common Mistakes

Using an index out of range like 2 or 3 causes errors.

Starting at index 1 skips the first point.

The enemy starts moving towards the first point, which is at index 0 in the points array.

2fill in blank

medium

Complete the code to check if the enemy reached the patrol point.

Unity

if (Vector3.Distance(transform.position, points[currentPoint].position) [1] 0.1f) {
    currentPoint = (currentPoint + 1) % points.Length;
}

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A<

B>

C>=

D<=

Attempts:

3 left

💡 Hint

Common Mistakes

Using > instead of < causes the condition to never be true.

Using >= or <= changes the logic incorrectly.

The enemy is considered to have reached the point if the distance is less than 0.1 units.

3fill in blank

hard

Fix the error in the chase code to make the enemy follow the player.

Unity

transform.position = Vector3.MoveTowards(transform.position, [1], speed * Time.deltaTime);

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Aplayer

BplayerPosition

Cplayer.transform

Dplayer.transform.position

Attempts:

3 left

💡 Hint

Common Mistakes

Using player or player.transform directly causes type errors.

Using playerPosition if not defined causes errors.

The MoveTowards method needs a Vector3 position, so we use player.transform.position.

4fill in blank

hard

Fill both blanks to make the enemy switch from patrol to chase when close to the player.

Unity

if (Vector3.Distance(transform.position, player.transform.position) [1] chaseRange) {
    isChasing = [2];
}

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A<=

Btrue

C>

Dfalse

Attempts:

3 left

💡 Hint

Common Mistakes

Using > instead of <= reverses the logic.

Setting isChasing to false stops chasing.

The enemy starts chasing when the player is within chaseRange, so distance <= chaseRange and isChasing is set to true.

5fill in blank

hard

Fill all three blanks to make the enemy stop chasing and resume patrol when the player is far.

Unity

if (Vector3.Distance(transform.position, player.transform.position) [1] chaseRange) {
    isChasing = [2];
    currentPoint = [3];
}

Drag options to blanks, or click blank then click option'

A>

Bfalse

C0

Dtrue

Attempts:

3 left

💡 Hint

Common Mistakes

Using < instead of > reverses the logic.

Setting isChasing to true keeps chasing.

Not resetting currentPoint causes patrol to start at wrong point.

The enemy stops chasing when the player is farther than chaseRange, so distance > chaseRange, isChasing is false, and patrol restarts at point 0.