void Start()
{
if (Camera.main == null)
{
GameObject go = new GameObject("Camera");
mainCamera = go.AddComponent <Camera>();
}
else
{
mainCamera = Camera.main;
}
mainCamera.clearFlags = CameraClearFlags.Color;
mainCamera.backgroundColor = Color.black;
mainCamera.orthographic = true;
mainCamera.orthographicSize = 1f;
mainCamera.nearClipPlane = 0f;
screenRect = Rect.MinMaxRect(-mainCamera.aspect, -1f, mainCamera.aspect, 1f);
entitys = new DList <Entity>();
playerEntitys = new DList <MoveAbleEntity>();
speeds = new DList <SpeedComponent>();
eatings = new DList <EatingComponent>();
entitySystem = new EntitySystem(this);
moveSystem = new MoveSystem(this);
gameObjectSystem = new GameObjectSystem(this);
inputSystem = new InputSystem(this);
eatSystem = new EatSystem(this);
eatingSystem = new EatingSystem(this);
circlePushSystem = new CirclePushSystem(this);
entitySystem.InitScene();
ApplyDelayCommands();//执行延迟增删数组内容的操作
}