Initial Commit

Assets/Scripts/Systems/Enemy/EnemySpawnSystem.cs

@@ -0,0 +1,63 @@
+using Events;
+using Trive.Mono.Utils;
+using Unity.Collections;
+using Unity.Entities;
+using UnityEngine;
+using Zenject;
+
+namespace DefaultNamespace
+{
+	[UpdateAfter(typeof(EnemyDeathSystem))]
+	public class EnemySpawnSystem : InjectableComponentSystem
+	{
+		private NativeQueue<int> DeathsQueue = new NativeQueue<int>(Allocator.Persistent);
+		[Inject] private Unity.Entities.World world;
+
+		protected override void OnDestroy()
+		{
+			DeathsQueue.Dispose();
+		}
+
+		protected override void OnSystemUpdate()
+		{
+			Entities.ForEach(
+				(Spawner spawner) =>
+				{
+					spawner.SpawnTimer = Mathf.Max(0, spawner.SpawnTimer - Time.DeltaTime);
+					if (spawner.SpawnTimer <= 0 && spawner.CurrentCount < spawner.MaxTotalSpawns)
+					{
+						spawner.SpawnTimer = spawner.MaxSpawnInterval;
+						var spawnCount = Mathf.Min(spawner.MaxTotalSpawns - spawner.CurrentCount, spawner.MaxSpawns);
+						for (var j = 0; j < spawnCount; j++)
+						{
+							var pos = (Vector2)spawner.transform.position + Random.insideUnitCircle * spawner.SpawnRadius;
+							spawner.EnemyPrefab.Template.InstantiateAsync(pos, Quaternion.identity).Completed += operation =>
+							{
+								var entity = operation.Result.gameObject.ConvertToEntity(world);
+								operation.Result.gameObject.GetComponent<ActorFacade>().Entity = entity;
+								operation.Result.gameObject.GetComponent<ActorFacade>().World = World;
+								world.EntityManager.AddComponentData(entity, new SpawnInfo { SpawnerId = spawner.GetInstanceID() });
+							};
+							spawner.CurrentCount++;
+						}
+					}
+				});
+
+			Entities.WithAllReadOnly<EntityDeathEvent, SpawnInfo>()
+				.ForEach(entity => { DeathsQueue.Enqueue(EntityManager.GetComponentData<SpawnInfo>(entity).SpawnerId); });
+
+			while (DeathsQueue.Count > 0)
+			{
+				var enemy = DeathsQueue.Dequeue();
+				Entities.ForEach(
+					(Spawner spawner) =>
+					{
+						if (spawner.GetInstanceID() == enemy)
+						{
+							spawner.CurrentCount = Mathf.Max(spawner.CurrentCount - 1, 0);
+						}
+					});
+			}
+		}
+	}
+}