public void Push(ref GameState topstate)
{
if (inuse)
throw new InvalidOperationException();
next = topstate;
topstate = this;
inuse = true;
}
static Core()
{
console = new DoomConsole();
video = new NullVideoSystem(false);
music = new MusicPlayer();
archives = new MultiArchive();
topstate = null;
stopwatch = Stopwatch.StartNew();
lasttime = 0;
coresystems = new Dictionary<string,Type>();
PushState(new RootState());
}
public GameState()
{
this.inuse = false;
this.next = null;
}
public static void PopState()
{
if (topstate is RootState)
throw new InvalidOperationException();
topstate = topstate.Next;
}
public static void PushState(GameState state)
{
if (state == null)
throw new ArgumentNullException("state");
state.Push(ref topstate);
}