Time for action – supporting map transitions

1. Add a new helper method to the Helper Methods region of the Player class:

   Private Sub checkLevelTransition()
       Dim centerCell As Vector2 = TileMap.GetCellByPixel(WorldCenter)
   
       If TileMap.CellCodeValue(centerCell).StartsWith("T_") Then
           Dim code() As String
           code = TileMap.CellCodeValue(centerCell).Split(CChar("_"))
        
           If code.Length <> 4 Then
             Return
           End If
   
           LevelManager.LoadLevel(Integer.Parse(code(1)))
   
           WorldLocation = new Vector2(
               Integer.Parse(code(2)) * TileMap.TileWidth,
               Integer.Parse(code(3)) * TileMap.TileHeight)
          
           LevelManager.RespawnLocation = WorldLocation
   
           Velocity = Vector2.Zero
       End If
   End Sub

2. Modify the Update() method of the Player class to add a check for pressing the Up key or pressing Up on the gamepad to check the current square for an available transition. Place this after the check for pressing the Space bar...