147 lines
5.0 KiB
C#
147 lines
5.0 KiB
C#
using System.Collections;
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using System.Collections.Generic;
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using BaseGames.Core.Events;
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using UnityEngine;
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namespace BaseGames.World
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{
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/// <summary>
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/// 移动平台。Kinematic Rigidbody2D，支持三种移动模式。
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/// 乘客跟随：OnTriggerEnter2D 时 SetParent，离开时还原并附加速度。
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/// </summary>
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[RequireComponent(typeof(Rigidbody2D))]
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public class MovingPlatform : MonoBehaviour
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{
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public enum MoveType { LinearAB, WayPoints, TriggeredLinear }
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[Header("移动配置")]
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[SerializeField] private MoveType _moveType = MoveType.LinearAB;
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[SerializeField] private Transform[] _wayPoints;
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[SerializeField] private float _speed = 3f;
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[SerializeField] private float _waitAtEndpoint = 0.5f;
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[Header("TriggeredLinear 模式")]
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[SerializeField] private VoidEventChannelSO _activationChannel;
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[Header("乘客检测")]
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[SerializeField] private BoxCollider2D _passengerSensor; // IsTrigger，用于乘客 SetParent
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private Rigidbody2D _rb;
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private List<Transform> _passengers = new();
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private int _waypointIndex;
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private bool _movingForward = true;
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private bool _triggered;
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private bool _waiting;
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private WaitForSeconds _waitForEndpoint;
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private readonly CompositeDisposable _subs = new();
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private void Awake()
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{
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_rb = GetComponent<Rigidbody2D>();
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_rb.bodyType = RigidbodyType2D.Kinematic;
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_rb.interpolation = RigidbodyInterpolation2D.Interpolate;
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_waitForEndpoint = new WaitForSeconds(_waitAtEndpoint);
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}
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private void OnEnable()
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{
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_activationChannel?.Subscribe(OnTriggered).AddTo(_subs);
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}
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private void OnDisable()
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{
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_subs.Clear();
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}
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private void FixedUpdate()
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{
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if (_wayPoints == null || _wayPoints.Length == 0) return;
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if (_moveType == MoveType.TriggeredLinear && !_triggered) return;
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if (_waiting) return;
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MoveTowardsNextWaypoint();
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}
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private void MoveTowardsNextWaypoint()
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{
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var target = (Vector2)_wayPoints[_waypointIndex].position;
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var next = Vector2.MoveTowards(_rb.position, target, _speed * Time.fixedDeltaTime);
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_rb.MovePosition(next);
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if (Vector2.Distance(_rb.position, target) < 0.02f)
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StartCoroutine(WaitAndAdvance());
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}
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private IEnumerator WaitAndAdvance()
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{
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_waiting = true;
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yield return _waitForEndpoint;
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AdvanceWaypoint();
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_waiting = false;
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}
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private void AdvanceWaypoint()
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{
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if (_moveType == MoveType.TriggeredLinear)
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{
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_waypointIndex = Mathf.Min(_waypointIndex + 1, _wayPoints.Length - 1);
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if (_waypointIndex == _wayPoints.Length - 1)
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_triggered = false;
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return;
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}
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if (_moveType == MoveType.LinearAB)
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{
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_movingForward = !_movingForward;
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_waypointIndex = _movingForward ? 1 : 0;
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}
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else // WayPoints
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{
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_waypointIndex = (_waypointIndex + 1) % _wayPoints.Length;
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}
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}
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private void OnTriggered() => _triggered = true;
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// ── Passenger Pattern ─────────────────────────────────────────────────
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private void OnTriggerEnter2D(Collider2D other)
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{
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if (!IsPassenger(other.gameObject)) return;
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other.transform.SetParent(transform);
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_passengers.Add(other.transform);
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}
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private void OnTriggerExit2D(Collider2D other)
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{
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if (!_passengers.Contains(other.transform)) return;
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other.transform.SetParent(null);
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_passengers.Remove(other.transform);
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// 离开时附加平台速度，避免卡顿
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var passengerRb = other.GetComponentInParent<Rigidbody2D>();
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if (passengerRb != null)
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passengerRb.AddForce(_rb.velocity, ForceMode2D.Impulse);
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}
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private static bool IsPassenger(GameObject go)
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{
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return go.CompareTag("Player") || go.CompareTag("Enemy");
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}
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#if UNITY_EDITOR
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private void OnDrawGizmos()
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{
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if (_wayPoints == null || _wayPoints.Length < 2) return;
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Gizmos.color = new Color(1f, 0.8f, 0f, 0.8f);
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for (int i = 0; i < _wayPoints.Length - 1; i++)
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{
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if (_wayPoints[i] != null && _wayPoints[i + 1] != null)
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Gizmos.DrawLine(_wayPoints[i].position, _wayPoints[i + 1].position);
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}
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}
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#endif
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}
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}
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