# C# Events in Unity to separate GameObject features into Components

Broadly speaking, this is a question about how to separate my game object's code into distinct feature components that can be added and removed as needed.

More specifically, I am trying to achieve this using C# events in Unity. But I am open to other solutions.

Scenario: We have enemies that have health. When their health reaches zero, they die. Some enemies (think asteroids) may spawn a number of child enemies (think smaller astroid pieces) when they die. Others however, just die.

I want to have two scripts:

• EnemyHealth: Tracks the enemy's health and kills the enemy when its health reaches zero.
• EnemyChildrenSpawner: Spawns child enemies after the enemy's death

This way, all enemies will have the EnemyHealth script, and some enemies will have the EnemyChildrenSpawner script in addition.

My idea is to have the EnemyHealth script raise an event when the enemy dies, and have EnemyChildrenSpawner subscribe to said event to spawn the children.

What would be the best way of achieving this?

Here's my attempt. It works. Just not sure if this is good practice, especially using the GetComponent in the second script?

EnemyHealth.cs

public class EnemyHealth : MonoBehaviour
{
// The event to invoke when this enemy died
public event EventHandler OnDied;

// Gets called when this enemy's health reached zero
private void Die()
{
// Invoke the died event
OnDied?.Invoke(this, EventArgs.Empty);

// Destroy this enemy
}
}


EnemyChildrenSpawner.cs

public class EnemyChildrenSpawner : MonoBehaviour
{
private void OnEnable()
{
GetComponent<EnemyHealth>().OnDied += SpawnChildren;
}

private void OnDisable()
{
GetComponent<EnemyHealth>().OnDied -= SpawnChildren;
}

private void SpawnChildren(object sender, EventArgs e)
{
// Spawn children
}
}

$$$$


public UnityEvent OnDie;
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