public void OnEntityComponentChange(Entity entity, IComponent component)
        {
            List <ECSGroup> oldSystems;

            if (!entityToGroupDic.TryGetValue(entity, out oldSystems))
            {
                oldSystems = new List <ECSGroup>();
                entityToGroupDic.Add(entity, oldSystems);
            }

            List <ECSGroup> newGroupList = GetEntitySuportGroup(entity);

            entityToGroupDic[entity] = newGroupList;

            for (int i = 0; i < newGroupList.Count; i++)
            {
                ECSGroup sys = newGroupList[i];
                if (!oldSystems.Contains(sys))
                {
                    List <Entity> list = groupToEntityDic[sys];
                    if (list == null)
                    {
                        list = new List <Entity>();
                    }
                    list.Add(entity);
                }
            }


            for (int i = 0; i < oldSystems.Count; i++)
            {
                ECSGroup sys = oldSystems[i];
                if (!newGroupList.Contains(sys))
                {
                    List <Entity> list = groupToEntityDic[sys];
                    if (list == null)
                    {
                        list = new List <Entity>();
                    }

                    list.Remove(entity);
                }
            }
        }
        private bool AddGroup(int key, string[] componentFilter)
        {
            if (componentFilter == null || componentFilter.Length == 0)
            {
                Debug.LogError("AddGroup 失败,参数不能为空!");
                return(false);
            }
            if (allGroupDic.ContainsKey(key))
            {
                Debug.LogError("AddGroup 失败,名字重复!");
                return(false);
            }

            ECSGroup group = new ECSGroup(key, componentFilter);

            allGroupDic.Add(key, group);

            List <Entity> newListEntity = new List <Entity>();

            List <Entity> listEntity = new List <Entity>(entityToGroupDic.Keys);

            for (int i = 0; i < listEntity.Count; i++)
            {
                Entity          entity       = listEntity[i];
                List <ECSGroup> newGroupList = GetEntitySuportGroup(entity);
                bool            isContains   = true;
                for (int j = 0; j < componentFilter.Length; j++)
                {
                    if (!entity.Components.ContainsKey(componentFilter[j]))
                    {
                        isContains = false;
                    }
                }
                if (isContains)
                {
                    newListEntity.Add(entity);
                    entityToGroupDic[entity].Add(group);
                }
            }
            groupToEntityDic.Add(group, newListEntity);

            return(true);
        }