Unity Damage Enemy Script - How to Become a Game Developer using Unity Game Engine Full Course 2022

Introduction

In this tutorial, we will create a damage system for enemies in a Unity game, enhancing your skills as a game developer. This guide is part of a comprehensive course on Unity 3D game development, specifically aimed at building a third-person perspective game. By following these steps, you will learn to implement an essential game mechanic that tracks and manages enemy health.

Step 1: Setting Up the Enemy Script

1. Create a New Script

   • In Unity, right-click in the Project window.
   • Select Create > C# Script.
   • Name the script Enemy.

2. Open the Script

   • Double-click the Enemy script to open it in your code editor.

3. Define Variables

   • At the top of the script, define the following variables:

     public float health = 100f;
     public float damage = 10f;
     public bool isAlive = true;
     

Step 2: Implementing the Damage Function

1. Create a Method for Taking Damage

   • Inside the Enemy class, create a method named TakeDamage:

     public void TakeDamage(float amount) {
         health -= amount;
         if (health <= 0) {
             Die();
         }
     }
     

2. Create the Die Method

   • Define the Die method to handle what happens when the enemy's health drops to zero:

     void Die() {
         isAlive = false;
         // Add logic for enemy death (e.g., disable the enemy, play animation)
     }
     

Step 3: Integrating the Damage System with Gameplay

1. Trigger Damage on Enemy

   • In the script where you handle player attacks (e.g., a weapon script), call the TakeDamage method on the enemy:

     if (enemy.isAlive) {
         enemy.TakeDamage(playerDamage);
     }
     

2. Ensure Damage is Recorded

   • Make sure that the damage amount is passed correctly from the player script to the enemy script.

Step 4: Testing the Enemy Damage System

1. Test in Unity

   • Save your scripts and return to the Unity Editor.
   • Assign the Enemy script to your enemy GameObject.
   • Play the game and test if the enemies take damage correctly when interacted with by the player.

2. Debugging

   • If the enemies do not take damage, check:
     • If the TakeDamage method is being called.
     • The values of health and damage.
     • Ensure the enemy object is active in the scene.

Conclusion

In this tutorial, you have implemented a damage system for enemies in Unity, which is a crucial component of many games. Key takeaways include defining health variables, creating methods for taking damage and handling death, and integrating this functionality into your gameplay. As you progress, consider adding features like health bars or different types of damage to enhance your game further. Keep practicing and explore more advanced concepts to continue your journey as a game developer!