/// <inheritdoc/>
public override bool CanTransitionTo(Scene scene)
{
if (scene is SongSelectScene)
return true;
else
return false;
}
/// <inheritdoc/>
public override bool CanTransitionTo(Scene scene)
{
throw new NotImplementedException();
}
/// <summary>
/// Transitions from the given old scene to the given new scene.
/// </summary>
/// <param name="oldScene">The old scene that should be replaced with the new scene.</param>
/// <param name="newScene">The new scene that should replace the given old scene.</param>
public void Transition(Scene oldScene, Scene newScene)
{
int oldSceneIndex = activeScenes.IndexOf(oldScene);
if (oldSceneIndex == -1)
throw new Exception($"Attempted to transition from non-active scene {oldScene.Name} to {newScene.Name}");
int newSceneIndex = activeScenes.IndexOf(newScene);
if (newSceneIndex != -1)
throw new Exception($"Attempted to transition from {oldScene.Name} to already-active scene {newScene.Name}");
if (!oldScene.CanTransitionTo(newScene))
throw new Exception($"Attempted invalid transition from {oldScene.Name} to {newScene.Name}");
Action onTransitionOutFinished = null; // this is necessary due to definite-assignment rules.
onTransitionOutFinished = () =>
{
oldScene.OnExit();
activeScenes.Remove(oldScene);
oldScene.TransitionFinished -= onTransitionOutFinished;
};
oldScene.TransitionFinished += onTransitionOutFinished;
oldScene.TransitionOut();
activeScenes.Add(newScene);
newScene.TransitionIn();
}
/// <inheritdoc/>
public override bool CanTransitionTo(Scene scene)
{
return scene is PlayScene;
}
/// <summary> /// Returns true if this scene is allowed to transition to the given scene, false otherwise. /// </summary> /// <param name="scene">The scene that should be transitioned to.</param> /// <returns>True if this scene is allowed to transition to the given scene, false otherwise.</returns> public abstract bool CanTransitionTo(Scene scene);
