/// <summary>
/// Get next usable id
/// </summary>
/// <returns>next usable r bangou</returns>
public int GetNextRBangou(int id, int skip)
{
foreach (DrawObject o in _mokkanObjList.Skip(skip))
{
if (o.MokkanInfo.RBangou == id)
{
return(GetNextRBangou(id + 1, skip));
}
}
return(id);
}