79 lines
2.5 KiB
C#
79 lines
2.5 KiB
C#
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using System.Collections;
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using System.Collections.Generic;
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using UnityEngine;
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using UnityEngine.Events;
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using UnityEngine.SceneManagement;
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namespace MoreMountains.Tools
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{
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/// <summary>
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/// This helper class, meant to be used by the MMAdditiveSceneLoadingManager, creates a temporary scene to store objects that might get instantiated, and empties it in the destination scene once loading is complete
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/// </summary>
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public class MMSceneLoadingAntiSpill
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{
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protected Scene _antiSpillScene;
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protected Scene _destinationScene;
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protected UnityAction<Scene, Scene> _onActiveSceneChangedCallback;
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protected string _sceneToLoadName;
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protected List<GameObject> _spillSceneRoots = new List<GameObject>(50);
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/// <summary>
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/// Creates the temporary scene
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/// </summary>
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/// <param name="sceneToLoadName"></param>
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public virtual void PrepareAntiFill(string sceneToLoadName)
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{
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_antiSpillScene = SceneManager.CreateScene($"AntiSpill_{sceneToLoadName}");
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_destinationScene = default;
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_sceneToLoadName = sceneToLoadName;
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if (_onActiveSceneChangedCallback != null) { SceneManager.activeSceneChanged -= _onActiveSceneChangedCallback; }
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_onActiveSceneChangedCallback = OnActiveSceneChanged;
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SceneManager.activeSceneChanged += _onActiveSceneChangedCallback;
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SceneManager.SetActiveScene(_antiSpillScene);
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}
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/// <summary>
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/// Once the destination scene has been loaded, we catch that event and prepare to empty
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/// </summary>
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/// <param name="from"></param>
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/// <param name="to"></param>
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protected virtual void OnActiveSceneChanged(Scene from, Scene to)
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{
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if (from == _antiSpillScene)
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{
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SceneManager.activeSceneChanged -= _onActiveSceneChangedCallback;
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_onActiveSceneChangedCallback = null;
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EmptyAntiSpillScene();
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}
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}
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/// <summary>
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/// Empties the contents of the anti spill scene into the destination scene
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/// </summary>
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protected virtual void EmptyAntiSpillScene()
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{
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if (_antiSpillScene.IsValid() && _antiSpillScene.isLoaded)
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{
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_spillSceneRoots.Clear();
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_antiSpillScene.GetRootGameObjects(_spillSceneRoots);
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_destinationScene = SceneManager.GetSceneByName(_sceneToLoadName);
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if (_spillSceneRoots.Count > 0)
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{
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if (_destinationScene.IsValid() && _destinationScene.isLoaded)
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{
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foreach (var root in _spillSceneRoots)
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{
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SceneManager.MoveGameObjectToScene(root, _destinationScene);
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}
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}
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}
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SceneManager.UnloadSceneAsync(_antiSpillScene);
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}
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}
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}
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}
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