/// <summary>
/// Runs a scene.
/// </summary>
/// <param name="id">The ID of the scene.</param>
/// <param name="initialise">Whether to intialise the scene.</param>
public void RunScene(int id, bool initialise)
{
// Check if the scene exists.
if (scenes.ContainsKey(id))
{
// Get scene as scene state.
ISceneState state = (ISceneState)scenes[id];
// If scene is already running, return.
if (state.State == SceneState.Running)
{
return;
}
// Else if scene is paused, then we want to remove the entities from the render system.
else if (state.State == SceneState.Paused)
{
// Get renderable entities from scene.
IReadOnlyList <IEntity> renderables = scenes[id].GetEntities().Where(entity => entity is IRenderable).ToList();
// Remove entities from render system.
foreach (IEntity entity in renderables)
{
renderSystem.RemoveEntity(entity.Id);
}
}
// Run scene.
IReadOnlyList <IEntity> entities = state.Run(initialise);
// Add entities to systems.
foreach (IEntity entity in entities)
{
collisionSystem.AddEntity(entity);
inputSystem.AddEntity(entity);
if (entity is IRenderable)
{
renderSystem.AddEntity(entity);
}
if (entity is IUpdatable)
{
updateSystem.AddEntity(entity);
}
}
}
}