Enemy Types

Part of the Game Architecture in Unity section of Coddy's Unity journey. Lesson 42 of 50.

Challenge

Medium

The enemies arrive. Keep everything from the last lesson. Two red grunts and an orange dasher stand in the arena, tagged Enemy, so the swing already knocks them out. Fill in three scripts:

Enemy becomes an abstract base. It has a protected float speed that the Inspector sets. In Start it finds the hero with FindAnyObjectByType<Hero>() and keeps its Transform. Every frame it works out the way to the hero along the ground (y set to 0) and passes it to protected abstract void Move(Vector3 toHero), which has no body.
Grunt derives from Enemy and overrides Move: it walks toward the hero at speed units a second (2 in the Inspector), and stands still once it is 1 unit from the hero or closer.
Dasher derives from Enemy, with restTime (1.5) and dashTime (0.4) that the Inspector sets. Its Move rests for restTime seconds, then dashes for dashTime seconds at speed (10) in the direction the hero was in when the dash began, then rests again, and so on.

Press Play and dodge them, then Check.

Try it yourself

using UnityEngine;

public class Enemy : MonoBehaviour
{
    // A later lesson fills this in: what every enemy has in common.
}

All lessons in Game Architecture in Unity

1Components, Not Hierarchies

Small Components A Base Enemy Script Abstract Components Components Working Together Recap: Modular Turret

4Serialized Data

Serializable Classes Lists in the Inspector Enums in the Inspector Recap: Loot Table

7State Machines

States as Classes A State Machine Transitions Enemy Brains Recap: Door States

10Project: Arena Survivor

The HeroEnemy Types Project lesson

2Interfaces in Unity

IDamageable Interfaces and TryGetComponent GetComponents Recap: Interact Key

5ScriptableObjects

Data Assets Weapon Stats Shared Settings Waves as Data Recap: Item Database

8Reusable Code

Extension Methods A Generic Singleton Generic Helpers Recap: FindNearest

11Final Challenges

Tower Defense Lite Crafting Bench Boss Fight

3Events

C# Events in Unity Subscribe in OnEnable UnityEvent Fields Events Drive the UI Recap: Achievement Popup

6Saving with JSON

JsonUtility Save the Game Load and Defaults Recap: Save Slots

9Object Pooling

Why Pool Objects A Pool with a Queue Unity's ObjectPool Recap: Bullet Pool