BoardScene.cs

using Godot;
using System;
using System.Linq;

public class BoardScene : Spatial
{
	ABoard _board;
	public ABoard Board {
		get { return _board; }
		set {
			_board = value;
			Bind (_board);
		}
	}

	public CardScene [,] CardScenes { get; set; }

	void Bind (ABoard board)
	{
		if (board == null) {
			return;
		}

		Reset ();
	}

	void Reset ()
	{
		if (CardScenes != null) {
			for (var i = 0; i < Board.Width; i++) {
				for (var j = 0; j < Board.Height; j++) {
					if (CardScenes [i, j] != null) {
						RemoveChild (CardScenes [i, j]);
					}
				}
			}
		}
		CardScenes = new CardScene [Board.Width, Board.Height];
	}

	public void AddCardScene (CardScene cardScene, BoardCoords boardCoords)
	{
		cardScene.Translation = new Vector3 (
			-(Const.CARD_WIDTH + Const.BOARD_GRID_SPACING) * (Board.Width - 1 - boardCoords.X * 2) / 2,
			(Const.CARD_HEIGHT + Const.BOARD_GRID_SPACING) * (Board.Height - 1 - boardCoords.Y * 2) / 2,
			0
		);

		cardScene.Rotation = Vector3.Zero;
		
		AddChild (cardScene);
		CardScenes [boardCoords.X, boardCoords.Y] = cardScene;
	}

	public CardScene GetCardScene (ACard card)
	{
		for (var i = 0; i < Board.Width; i++) {
			for (var j = 0; j < Board.Height; j++) {
				if (CardScenes [i, j] != null && CardScenes [i, j].Card == card) {
					return CardScenes [i, j];
				}
			}
		}
		return null;
	}
}