Question by OfficialLupaz · Feb 21, 2017 at 02:39 PM · c#scripting problem error message enemyai melee

Why does my Melee System not work?

So i made an melee system but i cant hit my enemy? i keep getting an null error... Here is my Melee Script:

 using System.Collections;
 using System.Collections.Generic;
 using UnityEngine;
 
 public class MeleeSystem : MonoBehaviour {
 
     public int minDamage = 25;
     public int maxDamage = 50;
     public float weaponRange = 3.5f;
 
     public Camera FPSCamera;
 
     private TreeHealth treeHealth;
     private AdvancedEnemyAI enemyAI;
 
     private void Update()
     {
         Ray ray = FPSCamera.ScreenPointToRay(new Vector2 (Screen.width / 2, Screen.height / 2));
         RaycastHit hitInfo;
 
         if (Input.GetKeyDown (KeyCode.Mouse0)) 
         {
             if (Physics.Raycast (ray, out hitInfo, weaponRange)) {
                 if (hitInfo.collider.tag == "Tree") {
                     treeHealth = hitInfo.collider.GetComponentInParent<TreeHealth> ();
                     AttackTree ();
                 } 
 
                 else if (hitInfo.collider.tag == "Enemy") 
                 {
                     enemyAI = hitInfo.collider.GetComponent<AdvancedEnemyAI> ();
                     AttackEnemy ();
                 }
             } 
         }
     }
 
 
     private void AttackTree()
     {
         int damage = Random.Range (minDamage, maxDamage);
         treeHealth.health -= damage;
     }
 
     private void AttackEnemy()
     {
         int damage = Random.Range(minDamage, maxDamage);
         enemyAI.TakeDamage(damage);
     }
 }
 
 
     private void AttackTree()
     {
         int damage = Random.Range (minDamage, maxDamage);
         treeHealth.health -= damage;
     }
 
     private void AttackEnemy()
     {
         int damage = Random.Range(minDamage, maxDamage);
         enemyAI.TakeDamage(damage);
     }
 }

And here is my Enemy Script:

 using System.Collections;
 using System.Collections.Generic;
 using UnityEngine;
 
 public class AdvancedEnemyAI : MonoBehaviour {
 
     public int health = 100;
     public float viewRange = 25f;
     public float attackRange = 5f;
 
     public float thinkTimer = 5f;
     private float thinkTimerMin = 5f;
     private float thinkTimerMax = 15f;
 
     public float randomUnitCircleRadius = 25f;
 
     public float eyeHeight;
 
     public bool isChasing = false;
 
     public Transform playerTransform;
 
     private UnityEngine.AI.NavMeshAgent agent;
 
     private void Start()
     {
         agent = GetComponent<UnityEngine.AI.NavMeshAgent> ();
 
         thinkTimer = Random.Range(thinkTimerMin, thinkTimerMax);
     }
 
     private void Update()
     {
         Vector3 eyePosition = new Vector3 (transform.position.x, transform.position.y + eyeHeight, transform.position.z);
 
         Ray ray = new Ray (eyePosition, transform.forward);
         RaycastHit hitInfo;
 
         CheckHealth ();
 
         thinkTimer -= Time.deltaTime;
 
         if (thinkTimer <= 0) 
         {
             Think ();
             thinkTimer = Random.Range(thinkTimerMin, thinkTimerMax);
         }
 
         if (Physics.Raycast (ray, out hitInfo, viewRange)) 
         {
             if (hitInfo.collider.tag == "Player") 
             {
                 if (isChasing == false) 
                 {
                     isChasing = true;
 
                     if (playerTransform == null) 
                     {
                         playerTransform = hitInfo.collider.GetComponent<Transform> ();
                     }
                 }
             }
         }
 
         if (Physics.Raycast (ray, out hitInfo, attackRange)) 
         {
             // Attacking Here
         }
 
 
         Debug.DrawRay (ray.origin, ray.direction * viewRange, Color.red);
 
         if (isChasing == true) 
         {
             agent.SetDestination (playerTransform.position);
         }
     }
 
     public void TakeDamage(int damage)
     {
         health -= damage;
 
         if (playerTransform != null) 
         {
             isChasing = true;
         }
 
         Debug.Log ("Enemy took damage and now has " + health + " health!");
     }
 
     private void CheckHealth()
     {
         if(health <= 0)
         {
             Destroy (gameObject);
         }
     }
 
     private void Think()
     {
         if (isChasing == false) 
         {
             Vector3 newPos = transform.position + new Vector3 (Random.insideUnitCircle.x * randomUnitCircleRadius, transform.position.y, Random.insideUnitCircle.y * randomUnitCircleRadius);
             agent.SetDestination (newPos);
         }
     }
 }

What is the problem?

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