/// <summary>
/// Returns a rectangle focused on the given Game Object,
/// so that its centre equals to the object position if possible.
/// </summary>
private FixedBoundRectangle GetFocusRectangle(Board board, GameObject focus)
{
var focusRectangle = new FixedBoundRectangle(
0,
0,
Math.Min(board.Width, Console.WindowWidth),
Math.Min(board.Height, Console.WindowHeight));
var playerPosition = focus.Position;
if (playerPosition.X - focusRectangle.Width / 2 >= 0)
{
focusRectangle.Right = Math.Min(board.Width, playerPosition.X + focusRectangle.Width / 2);
}
if (playerPosition.X + focusRectangle.Width / 2 < board.Width)
{
focusRectangle.Left = Math.Max(0, playerPosition.X - focusRectangle.Width / 2);
}
if (playerPosition.Y - focusRectangle.Height / 2 >= 0)
{
focusRectangle.Bottom = Math.Min(board.Height, playerPosition.Y + focusRectangle.Height / 2);
}
if (playerPosition.Y + focusRectangle.Height / 2 < board.Height)
{
focusRectangle.Top = Math.Max(0, playerPosition.Y - focusRectangle.Height / 2);
}
return(focusRectangle);
}
private void DrawBoard(Board board, GameObject focus)
{
focusRectangle = GetFocusRectangle(board, focus);
for (var row = focusRectangle.Top; row < focusRectangle.Bottom; row++)
{
for (var col = focusRectangle.Left; col < focusRectangle.Right; col++)
{
var currentPosition = new Position(row, col);
DrawObject(board, currentPosition, BoardToConsolePosition(currentPosition));
}
}
}