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Implementing Melee Attacks in Unity

Melee attacks are a fundamental part of many action and RPG games. In this tutorial, we'll create a simple melee attack system in Unity using C#.

Setting Up the Character

To begin, ensure you have a character with an Animator and a Collider (e.g., a BoxCollider or SphereCollider) attached.

Creating the Melee Attack Script

Create a new C# script and name it MeleeAttack. Attach this script to your player or character GameObject.

using UnityEngine;

public class MeleeAttack : MonoBehaviour
{
    public float attackRange = 1.5f;
    public int attackDamage = 20;
    public Transform attackPoint;
    public LayerMask enemyLayers;
    public Animator animator;

    void Update()
    {
        if (Input.GetMouseButtonDown(0)) // Left mouse click for attack
        {
            Attack();
        }
    }

    void Attack()
    {
        // Play attack animation
        animator.SetTrigger("Attack");

        // Detect enemies in attack range
        Collider[] hitEnemies = Physics.OverlapSphere(attackPoint.position, attackRange, enemyLayers);
        
        // Damage enemies
        foreach (Collider enemy in hitEnemies)
        {
            enemy.GetComponent<EnemyHealth>()?.TakeDamage(attackDamage);
        }
    }
}

Adding Enemy Health Script

To make sure enemies take damage, create an EnemyHealth script:

using UnityEngine;

public class EnemyHealth : MonoBehaviour
{
    public int health = 100;

    public void TakeDamage(int damage)
    {
        health -= damage;
        Debug.Log(gameObject.name + " took " + damage + " damage.");

        if (health <= 0)
        {
            Die();
        }
    }

    void Die()
    {
        Destroy(gameObject);
    }
}

Setting Up Attack Point

1. Create an empty GameObject as a child of your character.
2. Position it in front of the character (where the attack should hit).
3. Assign it to the attackPoint variable in the MeleeAttack script.

Configuring the Animator

Ensure your Animator has an "Attack" trigger parameter. Assign a melee attack animation to it in the Animator Controller.

Final Thoughts

Now, pressing the left mouse button will trigger an attack, playing an animation and damaging nearby enemies. You can expand this system with combo attacks, different weapon types, or even adding force to enemies when hit.

Happy coding! 🚀