/// <summary>
/// Stops a scene.
/// A stopped scene is not rendered nor updated.
/// </summary>
/// <param name="id">The ID of the scene.</param>
public void StopScene(int id)
{
// Check if scene exists.
if (scenes.ContainsKey(id))
{
// Get scene as state.
ISceneState state = (ISceneState)scenes[id];
// If scene is already stopped, return.
if (state.State == SceneState.Stopped)
{
return;
}
// If scene is paused, remove entities from render system.
else if (state.State == SceneState.Paused)
{
// Get renderable entities.
IReadOnlyList <IEntity> renderables = state.Stop().Where(entity => entity is IRenderable).ToList();
// Remove entities from render system.
foreach (IEntity entity in renderables)
{
renderSystem.RemoveEntity(entity.Id);
}
}
// Else, remove entities from all systems.
else
{
// Get entities.
IReadOnlyList <IEntity> entities = state.Stop();
// Remove entities from systems.
foreach (IEntity entity in entities)
{
collisionSystem.RemoveEntity(entity.Id);
inputSystem.RemoveEntity(entity.Id);
renderSystem.RemoveEntity(entity.Id);
updateSystem.RemoveEntity(entity.Id);
}
}
}
}