133 lines
3.8 KiB
C#
133 lines
3.8 KiB
C#
using System.Collections.Generic;
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using UnityEngine;
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public class EnemySpawner : MonoBehaviour
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{
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[Header("Spawn Configuration")]
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[SerializeField] private Enemy _enemyPrefab;
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[SerializeField] private int _maxAliveCount = 3;
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[SerializeField] private float _spawnInterval = 2f;
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[SerializeField] private float _initialDelay = 0f;
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[Header("Spawn Position")]
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[SerializeField] private Transform[] _spawnPoints;
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[SerializeField] private float _spawnRadius = 0f;
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[SerializeField] private Transform _enemyParent;
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[Header("Behavior")]
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[SerializeField] private bool _spawnOnStart = true;
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[SerializeField] private bool _respawnOnDeath = true;
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[SerializeField] private int _totalSpawnLimit = 0;
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private readonly List<Enemy> _aliveEnemies = new();
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private float _nextSpawnTime;
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private int _totalSpawned;
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private bool _active;
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private void Start()
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{
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if (_spawnOnStart) BeginSpawning();
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}
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public void BeginSpawning()
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{
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_active = true;
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_nextSpawnTime = Time.time + _initialDelay;
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}
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public void StopSpawning() => _active = false;
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public void ResetSpawner()
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{
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for (int i = _aliveEnemies.Count - 1; i >= 0; i--)
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{
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if (_aliveEnemies[i] != null)
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Destroy(_aliveEnemies[i].gameObject);
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}
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_aliveEnemies.Clear();
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_totalSpawned = 0;
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_nextSpawnTime = Time.time + _initialDelay;
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}
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private void Update()
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{
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if (!_active) return;
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_aliveEnemies.RemoveAll(e => e == null);
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if (!_respawnOnDeath && _aliveEnemies.Count == 0 && _totalSpawned > 0) return;
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if (_totalSpawnLimit > 0 && _totalSpawned >= _totalSpawnLimit) return;
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if (_aliveEnemies.Count >= _maxAliveCount) return;
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if (Time.time < _nextSpawnTime) return;
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if (_enemyPrefab == null) return;
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SpawnOne();
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_nextSpawnTime = Time.time + _spawnInterval;
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}
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public Enemy SpawnOne()
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{
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if (_enemyPrefab == null) return null;
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Vector3 spawnPos = GetSpawnPosition();
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Enemy enemy = Instantiate(_enemyPrefab, spawnPos, Quaternion.identity, _enemyParent);
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_aliveEnemies.Add(enemy);
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_totalSpawned++;
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return enemy;
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}
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private Vector3 GetSpawnPosition()
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{
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Vector3 basePos;
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if (_spawnPoints != null && _spawnPoints.Length > 0)
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{
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Transform pick = _spawnPoints[Random.Range(0, _spawnPoints.Length)];
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basePos = pick != null ? pick.position : transform.position;
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}
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else
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{
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basePos = transform.position;
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}
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if (_spawnRadius > 0f)
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{
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Vector2 offset = Random.insideUnitCircle * _spawnRadius;
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basePos.x += offset.x;
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basePos.y += offset.y;
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}
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return basePos;
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}
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private void OnDrawGizmosSelected()
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{
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Color pointColor = Color.cyan;
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Color radiusColor = new Color(0f, 1f, 1f, 0.25f);
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if (_spawnPoints != null && _spawnPoints.Length > 0)
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{
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foreach (var p in _spawnPoints)
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{
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if (p == null) continue;
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Gizmos.color = pointColor;
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Gizmos.DrawWireSphere(p.position, 0.3f);
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if (_spawnRadius > 0f)
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{
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Gizmos.color = radiusColor;
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Gizmos.DrawWireSphere(p.position, _spawnRadius);
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}
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}
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}
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else
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{
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Gizmos.color = pointColor;
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Gizmos.DrawWireSphere(transform.position, 0.3f);
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if (_spawnRadius > 0f)
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{
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Gizmos.color = radiusColor;
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Gizmos.DrawWireSphere(transform.position, _spawnRadius);
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}
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}
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}
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}
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