public Bullet(int x, int y, ChallengeService.direction direction, int id)
{
this.x = x;
this.y = y;
this.direction = direction;
this.id = id;
this.updated = true;
}
public Tank(int x, int y, ChallengeService.direction direction, int id)
{
Initialize();
this.x = x;
this.y = y;
this.id = id;
this.direction = direction;
updated = true;
}