Question Why won't the enemy chase the main player?

I am trying to make an enemy ai chase the main player

here is the enemy ai -

Code (CSharp):

1. using System.Collections;
2. using System.Collections.Generic;
3. using UnityEngine;
4.  
5. public class Enemy : Mover
6. {
7.     // Experience
8.     public int xpValue = 1;
9.  
10.     // Logic
11.     public float triggerLength = 0.3f;
12.     public float chaseLength = 1;
13.     private bool chasing;
14.     private bool collidingWithPlayer;
15.     private Transform playerTransform;
16.     private Vector3 startingPosition;
17.  
18.     // Hitbox
19.     public ContactFilter2D filter;
20.     private BoxCollider2D hitbox;
21.     private Collider2D[] hits = new Collider2D[10];
22.  
23.     protected override void Start()
24.     {
25.         base.Start();
26.         playerTransform = GameManager.instance.player.transform;
27.         startingPosition = transform.position;
28.         hitbox = transform.GetChild(0).GetComponent<BoxCollider2D>();
29.     }
30.  
31.     protected void FixedUpdate()
32.     {
33.         // Is the player in range?
34.         if (Vector3.Distance(playerTransform.position, startingPosition) < chaseLength)
35.         {
36.             if (Vector3.Distance(playerTransform.position, startingPosition) < triggerLength)
37.                 chasing = true;
38.  
39.             if (chasing)
40.             {
41.                 if (!collidingWithPlayer)
42.                 {
43.                     UpdateMotor((playerTransform.position - transform.position).normalized);
44.                 }
45.             }
46.             else
47.             {
48.                 UpdateMotor(startingPosition - transform.position);
49.             }
50.         }
51.         else
52.         {
53.             UpdateMotor(startingPosition - transform.position);
54.             chasing = false;
55.         }
56.  
57.         // Check for overlaps
58.         collidingWithPlayer = false;
59.         hitbox.OverlapCollider(filter, hits);
60.         for (int i = 0; i < hits.Length; i++)
61.         {
62.             if (hits[i] == null)
63.                 continue;
64.  
65.             if (hits[i].tag == "Player" && hits[i].name == "Player")
66.             {
67.                 collidingWithPlayer = true;
68.             }
69.  
70.             // the array is not cleaned up, do it yourself
71.             hits[i] = null;
72.         }
73.     }
74.  
75.  
76.     protected override void Death()
77.     {
78.         Destroy(gameObject);
79.         GameManager.instance.Grantxp(xpValue);
80.         GameManager.instance.ShowText("+" + xpValue + " xp", 30, new Color(0.7169f, 0f, 0.7169f), transform.position, Vector3.up * 25, 1.0f);
81.     }
82. }

and here is the player script -

Code (CSharp):

1. using System.Collections;
2. using System.Collections.Generic;
3. using UnityEngine;
4.  
5. public class CharacterController2D : Fighter
6. {
7.     [SerializeField] private LayerMask dashLayerMask;
8.  
9.     private Rigidbody2D rigidbody2D;
10.     private Vector3 moveDir;
11.     private Vector3 lastMoveDir;
12.     private bool isDashButtonDown;
13.     private bool isAlive = true;
14.  
15.     private void Awake()
16.     {
17.         rigidbody2D = GetComponent<Rigidbody2D>();
18.     }
19.  
20.     private void Update()
21.     {
22.         float moveX = 0f;
23.         float moveY = 0f;
24.         if (Input.GetKey(KeyCode.W))
25.         {
26.             moveY = 0.005f;
27.         }
28.  
29.         if (Input.GetKey(KeyCode.S))
30.         {
31.             moveY = -0.005f;
32.         }
33.  
34.         if (Input.GetKey(KeyCode.A))
35.         {
36.             moveX = -0.005f;
37.         }
38.  
39.         if (Input.GetKey(KeyCode.D))
40.         {
41.             moveX = +0.005f;
42.         }
43.  
44.         moveDir = new Vector3(moveX, moveY).normalized;
45.         if (moveX != 0 || moveY != 0)
46.         {
47.             lastMoveDir = moveDir;
48.         }
49.  
50.         if (Input.GetKeyDown(KeyCode.Space))
51.         {
52.             isDashButtonDown = true;
53.         }
54.  
55.         // Swap sprite direction, wether you're going right or left
56.         if(moveDir.x > 0)
57.             transform.localScale = Vector3.one;
58.         else if(moveDir.x < 0)
59.             transform.localScale = new Vector3(-1, 1, 1);
60.     }
61.  
62.     private void FixedUpdate()
63.     {
64.         rigidbody2D.velocity = moveDir;
65.  
66.         if (isDashButtonDown)
67.         {
68.             float dashAmount = 0.3f;
69.             Vector3 dashPosition = transform.position + lastMoveDir * dashAmount;
70.  
71.             RaycastHit2D raycastHit2d = Physics2D.Raycast(transform.position, lastMoveDir, dashAmount, dashLayerMask);
72.             if (raycastHit2d.collider != null)
73.             {
74.                 dashPosition = raycastHit2d.point;
75.             }
76.  
77.             rigidbody2D.MovePosition(dashPosition);
78.             isDashButtonDown = false;
79.         }
80.     }
81.  
82.     public void OnLevelUp()
83.     {
84.         maxHitpoint++;
85.         hitpoint = maxHitpoint;
86.         GameManager.instance.OnHitpointChange();
87.     }
88.  
89.     public void SetLevel(int level)
90.     {
91.         for (int i = 0; i < level; i++)
92.             OnLevelUp();
93.     }
94.  
95.     protected override void ReceiveDamage(Damage dmg)
96.     {
97.         if (!isAlive)
98.             return;
99.  
100.         base.ReceiveDamage(dmg);
101.         GameManager.instance.OnHitpointChange();
102.     }
103.  
104.     public void Heal(int healingAmount)
105.     {
106.         if (hitpoint == maxHitpoint)
107.             return;
108.  
109.         hitpoint += healingAmount;
110.         if (hitpoint > maxHitpoint)
111.             hitpoint = maxHitpoint;
112.         GameManager.instance.ShowText("+" + healingAmount.ToString() + " hp", 30, new Color(0.4718f, 1f, 0.2663f), transform.position, Vector3.up * 25, 1.0f);
113.         GameManager.instance.OnHitpointChange();
114.     }
115.  
116.     public void Respawn()
117.     {
118.         Heal(maxHitpoint);
119.         isAlive = true;
120.         lastImmune = Time.time;
121.     }
122. }

and lastly here is the gamemanager script -

Code (CSharp):

1. using System.Collections;
2. using System.Collections.Generic;
3. using UnityEngine;
4. using UnityEngine.SceneManagement;
5.  
6. public class GameManager : MonoBehaviour
7. {
8.     public static GameManager instance;
9.     private void Awake()
10.     {
11.         if (GameManager.instance != null)
12.         {
13.             Destroy(gameObject);
14.             return;
15.         }
16.  
17.         instance = this;
18.         SceneManager.sceneLoaded += LoadState;
19.         DontDestroyOnLoad(gameObject);
20.     }
21.  
22.     // Resources
23.     public List<Sprite> playerSprites;
24.     public List<Sprite> weaponSprites;
25.     public List<int> weaponPrices;
26.     public List<int> xpTable;
27.  
28.     // References
29.     public CharacterController2D player;
30.     public RectTransform hitpointBar;
31.     public Animator deathMenuAnim;
32.     public FloatingTextManager floatingTextManager;
33.  
34.     // public weapon weapon...
35.  
36.     // Logic
37.     public int gold;
38.     public int experience;
39.  
40.     // Floating text
41.     public void ShowText(string msg, int fontSize, Color color, Vector3 position, Vector3 motion, float duration)
42.     {
43.         floatingTextManager.Show(msg, fontSize, color, position, motion, duration);
44.     }
45.  
46.     // Hitpoint bar
47.     public void OnHitpointChange()
48.     {
49.         float ratio = (float)player.hitpoint / (float)player.maxHitpoint;
50.         hitpointBar.localScale = new Vector3(ratio, 1, 1);
51.     }
52.  
53.     // Experience
54.     public int GetCurrentLevel()
55.     {
56.         int r = 0;
57.         int add = 0;
58.  
59.         while (experience >= add)
60.         {
61.             add += xpTable[r];
62.             r++;
63.  
64.             if (r == xpTable.Count)
65.                 return r;
66.         }
67.  
68.         return r;
69.     }
70.    
71.     public int GetXpToLevel(int level)
72.     {
73.         int r = 0;
74.         int xp = 0;
75.  
76.         while (r < level)
77.         {
78.             xp += xpTable[r];
79.             r++;
80.         }
81.  
82.         return xp;
83.     }
84.  
85.     public void Grantxp(int xp)
86.     {
87.         int currlevel = GetCurrentLevel();
88.         experience += xp;
89.         if (currlevel < GetCurrentLevel());
90.             OnLevelUp();
91.        
92.     }
93.  
94.     public void OnLevelUp()
95.     {
96.         GameManager.instance.ShowText("Level Up!", 30, new Color(0.7169f, 0f, 0.7169f), transform.position, Vector3.up * 25, 1.5f);
97.         player.OnLevelUp();
98.     }
99.  
100.     // DeathMenu and respawn
101.     public void Respawn()
102.     {
103.         deathMenuAnim.SetTrigger("Hide");
104.         UnityEngine.SceneManagement.SceneManager.LoadScene("Main");
105.         player.Respawn();
106.     }
107.  
108.     // Save state
109.     public void SaveState()
110.     {
111.         string s = "";
112.  
113.         s += "0" + "|";
114.         s += gold.ToString() + "|";
115.         s += experience.ToString() + "|";
116.         s += "0";
117.  
118.         PlayerPrefs.SetString("SaveState", s);
119.     }
120.     public void LoadState(Scene s, LoadSceneMode mode)
121.     {
122.         //player.transform.position = GameObject.Find("SpawnPoint").transform.position;
123.  
124.         if (!PlayerPrefs.HasKey("SaveState"))
125.             return;
126.  
127.         string[] data = PlayerPrefs.GetString("SaveState").Split('|');
128.  
129.         // Change player skin
130.         gold = int.Parse(data[1]);
131.  
132.         // Experience
133.         experience = int.Parse(data[2]);
134.         if (GetCurrentLevel() != 1)
135.             player.SetLevel(GetCurrentLevel());
136.  
137.         // Change the weapon level
138.  
139.     }
140. }

everything like the damage receival and output works its just that the enemy won't chase my player

thanks in advance for helping.

 

add some debug logs and Debug.DrawLine() to see whats happening and where all the positions are,
in enemy script:
does the first if' return true? (and then 2nd, 3rd, 4th if)

 

I've been having the same issue did you ever find the solution? Our enemy script is exactly the same and I've been struggling with this for months. How can I use the debug.log on the if statements? I couldn't figure it out I'm very new to coding.

 

It helps to see which part of the code gets executed.

if you use this script, you'll see that some of those debug log lines get called, some are not:

Code (CSharp):

1. using UnityEngine;
2.  
3. public class SampleScript : MonoBehaviour
4. {
5.     public int number = 10;
6.  
7.     void Start()
8.     {
9.         Debug.Log("Start method");
10.          if (number == 10)  Debug.Log("Start: Number is 10!");
11.     }
12.  
13.     void Update()
14.     {
15.         if (Input.GetKeyDown(KeyCode.Space))
16.         {
17.             Debug.Log("Space key was pressed");
18.         }
19.  
20.         if (number == 100)
21.         {
22.             MyMethod(number);
23.         }
24.     }
25.  
26.     void MyMethod(int something)
27.     {
28.         Debug.Log("MyMethod was called with value: " + something);
29.     }
30. }
31.