public InputCommand(string id, HumanInputState state, SVector2 position)
 {
     this.id = id;
     this.state = state;
     this.position = position;
 }
 public InputCommand(string id, HumanInputState state)
 {
     this.id = id;
     this.state = state;
     this.position = SVector2.zero;
 }