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.gitignore

@@ -107,3 +107,7 @@ $RECYCLE.BIN/
 
 # Pycharm project
 .idea
+Assets/Scenes/4-ai/ExScene.meta
+Assets/Prefabs/EnemyEngine.prefab.meta
+Assets/Scenes/4-ai/ExScene/NavMesh.asset.meta
+Assets/Scenes/4-ai/ExScene/NavMesh.asset.meta

.vscode/settings.json

@@ -0,0 +1,56 @@
+{
+    "files.exclude":
+    {
+        "**/.DS_Store":true,
+        "**/.git":true,
+        "**/.gitignore":true,
+        "**/.gitmodules":true,
+        "**/*.booproj":true,
+        "**/*.pidb":true,
+        "**/*.suo":true,
+        "**/*.user":true,
+        "**/*.userprefs":true,
+        "**/*.unityproj":true,
+        "**/*.dll":true,
+        "**/*.exe":true,
+        "**/*.pdf":true,
+        "**/*.mid":true,
+        "**/*.midi":true,
+        "**/*.wav":true,
+        "**/*.gif":true,
+        "**/*.ico":true,
+        "**/*.jpg":true,
+        "**/*.jpeg":true,
+        "**/*.png":true,
+        "**/*.psd":true,
+        "**/*.tga":true,
+        "**/*.tif":true,
+        "**/*.tiff":true,
+        "**/*.3ds":true,
+        "**/*.3DS":true,
+        "**/*.fbx":true,
+        "**/*.FBX":true,
+        "**/*.lxo":true,
+        "**/*.LXO":true,
+        "**/*.ma":true,
+        "**/*.MA":true,
+        "**/*.obj":true,
+        "**/*.OBJ":true,
+        "**/*.asset":true,
+        "**/*.cubemap":true,
+        "**/*.flare":true,
+        "**/*.mat":true,
+        "**/*.meta":true,
+        "**/*.prefab":true,
+        "**/*.unity":true,
+        "build/":true,
+        "Build/":true,
+        "Library/":true,
+        "library/":true,
+        "obj/":true,
+        "Obj/":true,
+        "ProjectSettings/":true,
+        "temp/":true,
+        "Temp/":true
+    }
+}

Assets/EngineRunner.cs

@@ -0,0 +1,42 @@
+using UnityEngine;
+using UnityEngine.AI;
+
+
+/**
+ * This component represents an NPC that runs randomly between targets.
+ * The targets are all the objects with a Target component.
+ */
+[RequireComponent(typeof(NavMeshAgent))]
+public class EngineRunner: MonoBehaviour {
+
+    [SerializeField] Transform engine;
+
+    private NavMeshAgent navMeshAgent;
+    private Animator animator;
+    private float rotationSpeed = 5f;
+
+    private void Start() {
+        navMeshAgent = GetComponent<NavMeshAgent>();
+        animator = GetComponent<Animator>();
+
+        SelectNewTarget();
+    }
+
+    private void SelectNewTarget() {
+        navMeshAgent.SetDestination(engine.position);
+    }
+
+
+    private void Update() {
+        if (navMeshAgent.hasPath) {
+            FaceDestination();
+        } 
+    }
+
+    private void FaceDestination() {
+        Vector3 directionToDestination = (navMeshAgent.destination - transform.position).normalized;
+        Quaternion lookRotation = Quaternion.LookRotation(new Vector3(directionToDestination.x, 0, directionToDestination.z));
+        //transform.rotation = lookRotation; // Immediate rotation
+        transform.rotation = Quaternion.Slerp(transform.rotation, lookRotation, Time.deltaTime * rotationSpeed); // Gradual rotation
+    }
+}

Assets/GrenadeScript.cs

@@ -0,0 +1,44 @@
+using System.Collections;
+using System.Collections.Generic;
+using UnityEngine;
+
+public class GrenadeScript : MonoBehaviour
+{
+    [SerializeField] GameObject explosionEffect;
+    [SerializeField] float delay = 3f;
+    [SerializeField] float explosionForce = 10f;
+    [SerializeField] float radius = 20f;
+
+    private float startingTime;
+    // Start is called before the first frame update
+    void Start()
+    {
+        startingTime = Time.deltaTime;
+    }
+
+    void Update()
+    {
+        startingTime += Time.deltaTime;
+        if(startingTime >= delay)
+        {
+            Explode();
+        }
+    }
+
+    // Update is called once per frame
+
+    private void Explode()
+    {
+        Collider[] colliders = Physics.OverlapSphere(transform.position, radius);
+
+        foreach(Collider near in colliders)
+        {
+            if(near.tag == "Enemy") {
+                Debug.Log(near.name+" is DEAD!");
+                Destroy(near.gameObject);
+            }
+        }
+        //Instantiate(explosionEffect,transform.position,transform.rotation);
+        Destroy(gameObject);
+    }
+}