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Assets/Mirror/Examples/Tanks/Scripts/Projectile.cs

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+using UnityEngine;
+
+namespace Mirror.Examples.Tanks
+{
+    public class Projectile : NetworkBehaviour
+    {
+        public float destroyAfter = 2f;
+        public Rigidbody rigidBody;
+        public float force = 1000f;
+
+        public override void OnStartServer()
+        {
+            Invoke(nameof(DestroySelf), destroyAfter);
+        }
+
+        // set velocity for server and client. this way we don't have to sync the
+        // position, because both the server and the client simulate it.
+        void Start()
+        {
+            rigidBody.AddForce(transform.forward * force);
+        }
+
+        // destroy for everyone on the server
+        [Server]
+        void DestroySelf()
+        {
+            NetworkServer.Destroy(gameObject);
+        }
+
+        // ServerCallback because we don't want a warning
+        // if OnTriggerEnter is called on the client
+        [ServerCallback]
+        void OnTriggerEnter(Collider other)
+        {
+            Debug.Log("Hit: " + other.name);
+            if (other.transform.parent.TryGetComponent(out Tank tank))
+            {
+                --tank.health;
+                if (tank.health == 0)
+                    NetworkServer.RemovePlayerForConnection(tank.netIdentity.connectionToClient, RemovePlayerOptions.Destroy);
+
+                DestroySelf();
+            }
+        }
+    }
+}