public MS_SetAsteroidDensity(BinaryReader br)
     : base(CommandID.SetAsteroidDensity, br)
 {
     z_density = (Asteroid.AsteroidDensity) br.ReadInt32();
 }
 public MS_SetAsteroidDensity(int timeStamp, Asteroid.AsteroidDensity density)
     : base(CommandID.SetAsteroidDensity, timeStamp)
 {
     z_density = density;
 }