/// <summary>
 /// Checks if the ship can be placed on its current position.
 /// If the placing is allowed for the fields, they will marked green.
 /// If the placing is forbidden for the fields, they will marked red.
 /// </summary>
 /// <param name="p">The playground with the fields</param>
 /// <param name="currentShip">The current ship</param>
 public static void HandleFieldCheck(Playground p, Ship currentShip)
 {
     int counter = 0;
     List<Field> markedFields = new List<Field>();
     foreach (Field field in p.fields)
     {
         int smaller = Convert.ToInt32(field.Size.Width / 2.1) * -1;
         Rectangle rect = new Rectangle(currentShip.Rectangle.X, currentShip.Rectangle.Y, currentShip.Rectangle.Width, currentShip.Rectangle.Height);
         rect.Inflate(smaller,smaller);
         if ((field.ReferencedShip == null || field.ReferencedShip == currentShip) && field.Rectangle.Intersects(rect))
         {
             field.SetColor(Enum.FieldColor.Green);
             counter++;
             markedFields.Add(field);
         }
         else
         {
             field.ResetColor();
         }
     }
     if (counter == currentShip.Size)
     {
         currentShip.OverlayColor = Color.Green;
         AppCache.CurrentMatch.FooterMenu.Get("btnPlace").Visible = true;
     }
     else
     {
         currentShip.OverlayColor = Color.Red;
         AppCache.CurrentMatch.FooterMenu.Get("btnPlace").Visible = false;
         foreach (Field f in markedFields)
         {
             f.SetColor(Enum.FieldColor.Red);
         }
     }
 }
 /// <summary>
 /// Returns all fields, which are good for placing the ship
 /// </summary>
 /// <param name="p">The playground with the fields</param>
 /// <param name="currentShip">The current ship</param>
 /// <returns></returns>
 public static List<Field> GetFields(Playground p, Ship currentShip)
 {
     List<Field> markedFields = new List<Field>();
     foreach (Field field in p.fields)
     {
         int smaller = Convert.ToInt32(field.Size.Width / 2.1) * -1;
         Rectangle rect = new Rectangle(currentShip.Rectangle.X, currentShip.Rectangle.Y, currentShip.Rectangle.Width, currentShip.Rectangle.Height);
         rect.Inflate(smaller, smaller);
         if ((field.ReferencedShip == null || field.ReferencedShip == currentShip) && field.Rectangle.Intersects(rect))
         {
             markedFields.Add(field);
         }
     }
     if (markedFields.Count == currentShip.Size)
     {
         return markedFields;
     }
     else
     {
         return null;
     }
 }