NavMesh Agent component in Unity - Practice Problems & Coding Challenges

Challenge - 5 Problems

❓ Predict Output

intermediate

What is the output of this NavMesh Agent speed change?

Consider this Unity C# script snippet attached to a GameObject with a NavMeshAgent component:

using UnityEngine;
using UnityEngine.AI;

public class SpeedTest : MonoBehaviour {
    NavMeshAgent agent;
    void Start() {
        agent = GetComponent();
        agent.speed = 5f;
        agent.speed = agent.speed * 2;
        Debug.Log(agent.speed);
    }
}

What will be printed in the console when the game starts?

Unity

using UnityEngine;
using UnityEngine.AI;

public class SpeedTest : MonoBehaviour {
    NavMeshAgent agent;
    void Start() {
        agent = GetComponent<NavMeshAgent>();
        agent.speed = 5f;
        agent.speed = agent.speed * 2;
        Debug.Log(agent.speed);
    }
}

A 10

B 5

C 0

D Error: NavMeshAgent not found

💡 Hint

Think about how the speed property is updated step-by-step.

The agent's speed is first set to 5, then doubled to 10. So the output is 10.

🧠 Conceptual

intermediate

Which NavMeshAgent property controls the stopping distance?

In Unity's NavMeshAgent component, which property determines how close the agent stops to its destination?

A angularSpeed

B radius

C speed

D stoppingDistance

💡 Hint

It is the distance from the target where the agent stops moving.

The stoppingDistance property sets how close the agent gets before stopping.

🔧 Debug

advanced

Why does this NavMeshAgent not move?

Look at this code snippet:

using UnityEngine;
using UnityEngine.AI;

public class MoveAgent : MonoBehaviour {
    NavMeshAgent agent;
    void Start() {
        agent = GetComponent();
        agent.destination = new Vector3(10, 0, 10);
    }
    void Update() {
        if(agent.remainingDistance < 0.1f) {
            Debug.Log("Arrived");
        }
    }
}

The agent does not move at all. What is the most likely reason?

A The NavMeshAgent component is disabled or missing a NavMesh to move on

B The destination is set incorrectly with wrong coordinates

C The Debug.Log statement stops the agent from moving

D The remainingDistance property is not updated in Update()

💡 Hint

Check if the agent has a valid NavMesh to walk on.

If the NavMeshAgent has no NavMesh or is disabled, it cannot move even if destination is set.

📝 Syntax

advanced

Which code correctly sets a NavMeshAgent destination?

Which of the following code snippets correctly sets the destination of a NavMeshAgent named agent to position (5, 0, 5)?

A agent.destination = new Vector3(5, 0, 5);

B agent.destination.Set(5, 0, 5);

C agent.SetDestination(new Vector3(5, 0, 5));

D agent.destination = Vector3(5, 0, 5);

💡 Hint

Remember the method used to assign a destination in NavMeshAgent.

The correct way is to call SetDestination() method with a Vector3 parameter.

🚀 Application

expert

How to make a NavMeshAgent stop immediately on command?

You want to stop a NavMeshAgent instantly during gameplay. Which code snippet achieves this best?

A agent.destination = agent.transform.position;

B agent.isStopped = true;

C agent.speed = 0;

D agent.enabled = false;

💡 Hint

Look for the property that pauses the agent's movement without disabling it.

Setting isStopped to true pauses the agent immediately without disabling the component or changing speed.