public SceneManager()
{
renderMapper = new RenderMapper();
CommandManager = new CommandManager();
Tree = new SceneTree();
}
public OptimizationSystem() : base(Selector.All(typeof(ModelComponent), typeof(ShaderComponent)))
{
tShader = ComponentTypeManager.GetType <ShaderComponent>();
tModel = ComponentTypeManager.GetType <ModelComponent>();
renderMapper = new RenderMapper();
}