How to destroy child object of other player in UNET?

Question

Right now, I have a multiplayer game where the player fires projectiles at other players that have a certain amount of bubbles. Once a player has lost all of their bubbles, they lose.

The issue I had previously was that on one screen, a first player could shoot out a second player's bubbles, but not all of the bubbles on the second player's screen would be popped, so I am trying to sync it over the network somehow.

The issue I'm seeing is that NetworkServer.Destroy requires finding the GameObject you intend to destroy by its NetworkIdentity, but only the root Player GameObject is allowed to have the NetworkIdentity component on it. What's the best way I can sync the destruction of a child object of a player?

Answer 1

The https://unity3d.com/fr/learn/tutorials/topics/multiplayer-networking/ course is very similar to the game you describe. It has a Bullet script attached to the fired bullets. If the bullets touched something, it check if it's a player, and apply damage to it (the player prefab has a Health script attached to it).

using UnityEngine;
using System.Collections;

public class Bullet : MonoBehaviour {

    void OnCollisionEnter(Collision collision)
    {
        var hit = collision.gameObject;

        /* Code below is from the original example
        var health = hit.GetComponent<Health>();
        if (health  != null)
        {
            health.TakeDamage(10);
        }*/

        var bubble = hit.GetComponent<BubbleBehavior>();
        if (bubble != null)
        {
            bubble.Popped(); // Implement a Popped function doing the magic
        }

        Destroy(gameObject);
    }
}

In your case you can do the same, but instead of checking if the touched object is a player, simply check if it is a bubble, and do whatever you want from the touched bubble.

In the original example, they sync the health (it is a "SyncVar"), in your case you can sync the number of bubbles remaining.