jelito/Assets/jelycho/Code/Enemies/WavesManagerActor.cs

using System.Collections.Generic;
using RebootKit.Engine.Extensions;
using RebootKit.Engine.Main;
using RebootKit.Engine.Simulation;
using Unity.Collections;
using UnityEngine;
using UnityEngine.AddressableAssets;

namespace RebootReality.jelycho.Enemies {
    public class WavesManagerActor : Actor {
        [SerializeField] AssetReferenceGameObject[] m_ZombiesPrefabs;
        [SerializeField] Transform[] m_SpawnPoints;

        [SerializeField] float m_SpawnRate = 32;
        [SerializeField] int m_MaxZombies = 1000;

        int m_Stage;
        int m_ZombiesToSpawn;
        float m_SpawnTimer;

        readonly List<ZombieActor> m_AliveZombies = new List<ZombieActor>(128);

        //
        // @MARK: Waves Manager
        //
        public void StartWave(int stage) {
            m_Stage = stage;
            m_ZombiesToSpawn = stage * 10;
            m_SpawnTimer = 1.0f;
        }

        void SpawnZombieAtRandomPosition() {
            Transform spawnPoint = m_SpawnPoints.Random();
            ZombieActor zombieActor = (ZombieActor) RR.SpawnActor(m_ZombiesPrefabs.Random(), spawnPoint.position, spawnPoint.rotation);
            zombieActor.died.AddListener(() => {
                m_AliveZombies.RemoveSwapBack(zombieActor);
            });
            
            m_AliveZombies.Add(zombieActor);
        }

        //
        // @MARK: IActor
        //
        protected override IActorData CreateActorData() {
            return new NoActorData();
        }

        public override void OnServerTick(float deltaTime) {
            base.OnServerTick(deltaTime);

            if (m_ZombiesToSpawn <= 0) {
                return;
            }

            if (m_AliveZombies.Count >= m_MaxZombies) {
                return;
            }
            
            m_SpawnTimer -= deltaTime;
            if (m_SpawnTimer <= 0.0f) {
                SpawnZombieAtRandomPosition();
                m_ZombiesToSpawn -= 1;
                m_SpawnTimer = 1.0f / m_SpawnRate;
            }
        }
    }
}