Dealing Damage to enemies (with class script)

Questions & Answers
1

So I have this Unithealth Script, projectile script, and an Enemy script. I’m attempting to use the projectile script to deal damage to the enemy who has an object instantiated from the UnitHealth script. My problem is I can’t figure out the correct “language” to put on the projectile script in order to make this happen. Ideally the game will have multiple projectiles and different types of enemies. I feel like I’m close to it just can’t quite figure it out. I’ve tried to call the “Dmg Unit” from the projectile script but can’t seem to access it. Any help would be appreciated!

UnitHealth Script

public class UnitHealth
{
    //Fields
    private int _currentHealth;
    private int _currentMaxHealth;

    // Properties
    public int Health
    {
        get { return _currentHealth; }  set { _currentHealth = value; }

    }

    public int MaxHealth
    {
        get { return _currentMaxHealth; }
        set { _currentMaxHealth = value; }

    }

    //Constructor
    public UnitHealth(int health, int maxHealth)
    {
        _currentHealth = health;
        _currentMaxHealth = maxHealth;
    }

    // Methods

    public void DmgUnit(int dmgAmount)
    {
        if (_currentHealth > 0)
        {
            _currentHealth -= dmgAmount;
        }
    }

    public void HealUnit(int healAmount)
    {
        if (_currentHealth < _currentMaxHealth)
        {
            _currentHealth += healAmount;
        }
        if (_currentHealth > _currentMaxHealth)
        {
            _currentHealth = _currentMaxHealth;
        }
    }
}

Enemy Script

public class EnemyAI : MonoBehaviour
{

    public UnitHealth _basicEnemy = new UnitHealth(40, 40);

    public NavMeshAgent agent;

    public Transform player;
    public Transform bulletSpawn;

    public LayerMask whatIsGround, whatIsPlayer;

    //Patroling
    public Vector3 walkPoint;
    bool walkPointSet;
    public float walkPointRange;

    //Attacking
    public float timeBetweenAttacks;
    bool alreadyAttacked;
    public GameObject projectile;
    public float rotationSpeed;
    public float chaseAttackDelay;

    //States
    public float sightRange, attackRange;
    public bool playerInSightRange, playerInAttackRange;

    private void Awake()
    {
        player = GameObject.Find("Player").transform;
        agent = GetComponent<NavMeshAgent>();
    }

    private void Update()
    {
        //Check for sight and attack range
        playerInSightRange = Physics.CheckSphere(transform.position, sightRange, whatIsPlayer);
        playerInAttackRange = Physics.CheckSphere(transform.position, attackRange, whatIsPlayer);

        if (!playerInSightRange && !playerInAttackRange) Patrolling();
        if (playerInSightRange && !playerInAttackRange) ChasePlayer();
        if (playerInAttackRange && playerInSightRange) AttackPlayer();

    }

    private void TakeDmg(int dmg)
    {
        _basicEnemy.DmgUnit(dmg);
    }
    

    private void Patrolling()
    {
        if (!walkPointSet) SearchWalkPoint();

        if (walkPointSet)
            agent.SetDestination(walkPoint);

        Vector3 distanceToWalkPoint = transform.position - walkPoint;

        //Walkpoint reached
        if (distanceToWalkPoint.magnitude < 1f)
            walkPointSet = false;
    }
    
    private void SearchWalkPoint()
    {
        //Calculate random point in range
        float randomZ = Random.Range(-walkPointRange, walkPointRange);
        float randomX = Random.Range(-walkPointRange, walkPointRange);

        walkPoint = new Vector3(transform.position.x + randomX, transform.position.y, transform.position.z + randomZ);

        if (Physics.Raycast(walkPoint, -transform.up, 2f, whatIsGround))
            walkPointSet = true;
    }

    private void ChasePlayer()
    {
        agent.SetDestination(player.transform.position);
    }

    private void AttackPlayer()
    {
        //Make sure enemy doesn't move
        agent.SetDestination(transform.position);
     
        transform.LookAt(player);
        transform.eulerAngles = new Vector3(0, transform.eulerAngles.y, 0);
        

        if (!alreadyAttacked)
        {
            ///Attack code here
            Rigidbody rb = Instantiate(projectile, bulletSpawn.position, Quaternion.identity).GetComponent<Rigidbody>();
            rb.AddForce(transform.forward * 32f, ForceMode.Impulse);
           
            ///End of attack code

            alreadyAttacked = true;
            Invoke(nameof(ResetAttack), timeBetweenAttacks);
        }
    }
    private void ResetAttack()
    {
        alreadyAttacked = false;
    }

    private void DestroyEnemy()
    {
        Destroy(gameObject);
    }



    private void OnDrawGizmosSelected()
    {
        Gizmos.color = Color.red;
        Gizmos.DrawWireSphere(transform.position, attackRange);
        Gizmos.color = Color.yellow;
        Gizmos.DrawWireSphere(transform.position, sightRange);
    }
}

Projectile Script

public class DefaultProjectile : MonoBehaviour
{

    public float speed;
    public float despawnTime = 2;
    
    private Rigidbody rb;
    void Start()
    {
        rb = GetComponent<Rigidbody>();
        rb.velocity = transform.forward * speed;
        Destroy(gameObject, despawnTime);
    }

    private void OnCollisionEnter(Collision collision)
    {
            Debug.Log("Hit");
            Destroy(gameObject);
    }
}
2

You can try something like this:

public class DefaultProjectile : MonoBehaviour
{
    public float speed;
    public float despawnTime = 2;
    public int damage = 10; // Added damage variable

    private Rigidbody rb;
    
    void Start()
    {
        rb = GetComponent<Rigidbody>();
        rb.velocity = transform.forward * speed;
        Destroy(gameObject, despawnTime);
    }
    
    private void OnCollisionEnter(Collision collision)
    {
        EnemyAI enemyAI = collision.gameObject.GetComponent<EnemyAI>(); // Check for EnemyAI script
        if (enemyAI != null) // If the collided object has EnemyAI script
        {
            enemyAI.TakeDmg(damage); // Call the TakeDmg method with the damage value
        }
        Debug.Log("Hit");
        Destroy(gameObject);
    }
}