Unity Basics Course: Enemy Character Movement and Attack Functionality

1. Introduction

Unity is a powerful game development platform used by many developers to create games. In this course, we will learn how to implement basic movement and attack functions for enemy characters. This course is aimed at beginners who have learned the basics of Unity, so we will explain the necessary tools and the basic script configuration in detail.

2. Getting Started

2.1. Installing Unity

To use Unity, you first need to download and install Unity Hub. Through Unity Hub, you can install the latest version of Unity and select the required templates to create a new project.

2.2. Project Setup

After creating a new 3D project and opening it, prepare the basic scene. Create a Terrain if necessary to build the map, and set up the camera and lighting.

3. Modeling Enemy Characters

3.1. Selecting Models

Select an enemy character model to use in Unity. You can use a three-dimensional model for interaction with the player, and various enemy character models can be downloaded from the free asset store.

3.2. Importing Models

After downloading the model, place it in the ‘Assets’ folder of the Unity project and import it in the Unity Editor. If the model includes animation elements, add an Animator component so that you can control the animations later.

4. Implementing Movement Functionality

4.1. Creating a Script

To implement movement functionality, create a C# script. Name the script ‘EnemyMovement’ and write the following basic movement code block.

using UnityEngine;

public class EnemyMovement : MonoBehaviour
{
    public float moveSpeed = 5f;
 
    void Update()
    {
        float moveHorizontal = Input.GetAxis("Horizontal");
        float moveVertical = Input.GetAxis("Vertical");
        
        Vector3 movement = new Vector3(moveHorizontal, 0.0f, moveVertical);
        transform.position += movement * moveSpeed * Time.deltaTime;
    }
}

        

4.2. Adjusting Movement Direction

To ensure the enemy character moves in the appropriate direction, adjust it to move relative to the character’s front. This can be implemented using the Transform’s LookAt() method.

5. Implementing Attack Functionality

5.1. Adding Attack Animations

Add animations for when the enemy character attacks. In the Animator panel, add animation clips and set up transitions to switch to the attack state.

5.2. Creating an Attack Script

To implement the attack functionality, write a new script called ‘EnemyAttack’. Below is the code for basic attack logic.

using UnityEngine;

public class EnemyAttack : MonoBehaviour
{
    public float attackRange = 1f;
    public int attackDamage = 10;

    void Update()
    {
        if (IsPlayerInRange())
        {
            Attack();
        }
    }

    bool IsPlayerInRange()
    {
        // Logic to check distance to the player
    }

    void Attack()
    {
        // Code to deal damage to the player
    }
}

        

6. Testing and Debugging

Now that the movement and attack functionalities are ready, test the enemy character to ensure everything works correctly. Activate play mode in the Unity Editor and check if the enemy character moves correctly and attacks.

7. Additional Functions and Improvements

7.1. Implementing Various Attack Methods

Diversify the attack methods of the enemy character to enhance the fun of the game. For example, you can implement melee attacks, ranged attacks, and powerful skills. This allows players to use various strategies in combat against the enemy characters.

7.2. AI Implementation

By giving the enemy character artificial intelligence (AI), you can improve responsiveness to the player. Utilize NavMesh to allow the enemy character to track the player and adjust attack behavior based on the distance to the player.