61 lines
2.1 KiB
C#
61 lines
2.1 KiB
C#
using System.Collections;
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using UnityEngine;
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using BaseGames.Core.Events;
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namespace BaseGames.UI
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{
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/// <summary>
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/// 全屏黑幕渐入渐出遮罩（架构 10_UIModule §8）。
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/// 由 SceneLoader 通过 EVT_LoadingOverlay BoolEventChannelSO 触发。
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/// true = 淡入（遮挡场景），false = 淡出（显示场景）。
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/// </summary>
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[RequireComponent(typeof(CanvasGroup))]
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public class LoadingOverlay : MonoBehaviour
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{
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[SerializeField] private CanvasGroup _canvasGroup;
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[SerializeField] private float _fadeDuration = 0.3f;
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[Header("Event Channel")]
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[SerializeField] private BoolEventChannelSO _onLoadingOverlayRequested; // EVT_LoadingOverlay
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private Coroutine _fadeCoroutine;
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private readonly CompositeDisposable _subs = new();
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private void Awake()
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{
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if (_canvasGroup == null)
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_canvasGroup = GetComponent<CanvasGroup>();
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// 初始状态：完全透明，不阻挡射线
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_canvasGroup.alpha = 0f;
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_canvasGroup.blocksRaycasts = false;
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}
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private void OnEnable() => _onLoadingOverlayRequested?.Subscribe(SetVisible).AddTo(_subs);
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private void OnDisable() => _subs.Clear();
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public void SetVisible(bool visible)
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{
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if (_fadeCoroutine != null) StopCoroutine(_fadeCoroutine);
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_fadeCoroutine = StartCoroutine(FadeCoroutine(visible ? 1f : 0f));
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}
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private IEnumerator FadeCoroutine(float target)
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{
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float start = _canvasGroup.alpha;
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float elapsed = 0f;
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// 遮挡时立刻阻挡射线，让开时完成后再放开
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if (target > 0.5f) _canvasGroup.blocksRaycasts = true;
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while (elapsed < _fadeDuration)
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{
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_canvasGroup.alpha = Mathf.Lerp(start, target, elapsed / _fadeDuration);
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elapsed += Time.unscaledDeltaTime;
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yield return null;
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}
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_canvasGroup.alpha = target;
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_canvasGroup.blocksRaycasts = target > 0.5f;
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}
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}
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}
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