private IEnumerable <TriominoTile> GetTileNeighbors(TriominoTile tile)
{
// No Checks for Arraybounds, cause this should create an Exception (so, the bounds can be enlargened then).
List <TriominoTile> neighbors = new List <TriominoTile>();
Point tileGridPosition = this.GetTileCoordsByName(tile.Name);
// Add neighbors from both tile sides (left and right, according to orientation)
neighbors.Add(this.tileGrid[tileGridPosition.Y, tileGridPosition.X - 1]);
neighbors.Add(this.tileGrid[tileGridPosition.Y, tileGridPosition.X + 1]);
if (tile.Orientation.ToArrayTileOrientation() == ArrayTileOrientation.BottomUp)
{
// Bottom
neighbors.Add(this.tileGrid[tileGridPosition.Y + 1, tileGridPosition.X]);
}
if (tile.Orientation.ToArrayTileOrientation() == ArrayTileOrientation.TopDown)
{
// Top
neighbors.Add(this.tileGrid[tileGridPosition.Y - 1, tileGridPosition.X]);
}
neighbors = neighbors.Where(n => n != null).ToList();
return(neighbors);
}
/// <summary>
/// Checks the values for a tile at a specific tileGridPosition.
/// If one value doesn't match the value within the tiles name false is returned,
/// while one null-value of the tileValueGrid values is allowed.
/// </summary>
/// <param name="tile">The tile whose values should be checked.</param>
/// <returns>True, if values matching (one tileValueGrid value can be null), false if not.</returns>
private bool CheckValueGridAtTileGridPosition(TriominoTile tile)
{
List <int?> valuesToCheck = this.GetValueGridValuesFromNameGridPositions(tile.TileGridPosition, tile.Orientation.ToArrayTileOrientation());
// if more than two values are null, this triomino tile
// isn't added adjacent to another tile (except for the first tile).
if (this.NumbTilesOnBoard > 0 && valuesToCheck.Where(v => !v.HasValue).Count() > 1)
{
return(false);
}
string[] nameParts = tile.GetArrayName().Split('-');
for (int i = 0; i < valuesToCheck.Count; i++)
{
int intValue = int.Parse(nameParts[i]);
if (valuesToCheck[i].HasValue && valuesToCheck[i] != intValue)
{
return(false);
}
}
return(true);
}
/// <summary>
/// Returns a tile from the tileGrid starting from a given face of a specific tile (and it's position on the tileGrid).
/// </summary>
/// <param name="tile">Tile to start from.</param>
/// <returns></returns>
internal TriominoTile GetAdjacentTileAtSpecificFace(TriominoTile tile, TileFace tileFace)
{
ArrayTileOrientation orientation = tile.Orientation.ToArrayTileOrientation();
if (orientation == ArrayTileOrientation.BottomUp && tileFace == TileFace.Bottom)
{
return(this.tileGrid[tile.TileGridPosition.Y + 1, tile.TileGridPosition.X]);
}
if (orientation == ArrayTileOrientation.TopDown && tileFace == TileFace.Bottom)
{
return(this.tileGrid[tile.TileGridPosition.Y - 1, tile.TileGridPosition.X]);
}
if (orientation == ArrayTileOrientation.BottomUp && tileFace == TileFace.Right ||
orientation == ArrayTileOrientation.TopDown && tileFace == TileFace.Left)
{
return(this.tileGrid[tile.TileGridPosition.Y, tile.TileGridPosition.X + 1]);
}
if (orientation == ArrayTileOrientation.BottomUp && tileFace == TileFace.Left ||
orientation == ArrayTileOrientation.TopDown && tileFace == TileFace.Right)
{
return(this.tileGrid[tile.TileGridPosition.Y, tile.TileGridPosition.X - 1]);
}
return(null);
}
/// <summary>
/// Sets a tile on the grid with coordinates from tile object.
/// </summary>
/// <param name="tile">The tile to be set on the grid including the coordinates.</param>
private void SetTileOnGrid(TriominoTile tile)
{
if (tile.TileGridPosition.Y < 0 || tile.TileGridPosition.X < 0)
{
throw new IndexOutOfRangeException("Only positive coordinates are allowed");
}
this.tileGrid[tile.TileGridPosition.Y, tile.TileGridPosition.X] = tile;
}
/// <summary>
/// Places a Tile on the TileGrid and TileValuesGrid
/// </summary>
/// <param name="tile"></param>
/// <returns></returns>
private bool AddTile(TriominoTile tile)
{
if (this.GetTileFromGrid(tile.TileGridPosition) != null)
{
throw new ArgumentException($"Cannot add tile {tile.Name} at position(x,y): ({tile.TileGridPosition.X}, {tile.TileGridPosition.Y}). Place is taken by tile: '{this.GetTileFromGrid(tile.TileGridPosition).Name}'");
}
this.SetTileOnGrid(tile);
this.AddValuesToValueGrid(tile.GetArrayName(), tile.TileGridPosition, tile.Orientation.ToArrayTileOrientation());
this.NumbTilesOnBoard++;
return(true);
}
private bool CheckMatchingAdjacentTiles(TriominoTile newTile)
{
bool newTileMatchesAdjacentTiles = true;
TileFace[] facesToCheck = new TileFace[] { TileFace.Bottom, TileFace.Right, TileFace.Left };
foreach (TileFace faceToCheck in facesToCheck)
{
TriominoTile adjacenTileAtFace = this.GetAdjacentTileAtSpecificFace(newTile, faceToCheck);
if (adjacenTileAtFace != null)
{
newTileMatchesAdjacentTiles = newTileMatchesAdjacentTiles && this.CheckMatchingAdjacentTileFaces(newTile, adjacenTileAtFace);
}
else
{
newTileMatchesAdjacentTiles = newTileMatchesAdjacentTiles && this.CheckBridgeEdgesAtTileFace(newTile, faceToCheck);
}
}
return(newTileMatchesAdjacentTiles);
}
/// <summary>
/// Checks if a tile can placed on the GameBoard, based on the tiles orientation,
/// and another tile next to which the new tile should be placed
/// </summary>
/// <param name="tile">The tile which should be placed</param>
/// <param name="otherName">The name of the other tile.</param>
/// <param name="otherFace">The face of the other tile at which the new tile should be placed.</param>
/// <returns>True, if the new tile can be placed, false if not.</returns>
public bool CanPlaceTileOnGameBoard(string tileName, string otherName, TileFace?tileFace, TileFace?otherFace, out TriominoTile placableTile)
{
placableTile = null;
// if it's the first tile it can always be placed.
if (this.NumbTilesOnBoard == 0)
{
placableTile = new TriominoTile(tileName, TileOrientation.Straight, new Point(this.maxGameBoardSize / 2, this.maxGameBoardSize / 2));
return(true);
}
// otherFace and otherName can only be null if it's the first tile
if (otherFace == null || otherName == null || otherName == string.Empty)
{
return(false);
}
Point otherTileGridCoordinates = this.GetTileCoordsByName(otherName);
Point possibleNewGridCoordinates = this.GetTileGridPositionFromOtherTilePositionAndFace(otherTileGridCoordinates, otherFace.Value);
if (possibleNewGridCoordinates.Y == -1 || possibleNewGridCoordinates.X == -1)
{
return(false);
}
TileOrientation tileOrientation = GameBoard.GetTileOrienationFromOtherTileOrientationAndFaces(this.GetTileFromGrid(otherTileGridCoordinates).Orientation, otherFace.Value, tileFace.Value);
TriominoTile tile = new TriominoTile(tileName, tileOrientation, possibleNewGridCoordinates);
// If Tile values can be placed it will be returned
if (this.CheckValueGridAtTileGridPosition(tile))
{
placableTile = tile;
return(true);
}
return(false);
}
private bool CheckBridgeEdgesAtTileFace(TriominoTile newTile, TileFace tileFace)
{
throw new NotImplementedException();
}
private bool CheckMatchingAdjacentTileFaces(TriominoTile thisTile, TriominoTile otherTile)
{
// adjacentTiles must have different Orientations.
if (thisTile.Orientation.ToArrayTileOrientation() == otherTile.Orientation.ToArrayTileOrientation())
{
return(false);
}
// other tile is right of this tile
if (thisTile.TileGridPosition.Y == otherTile.TileGridPosition.Y && thisTile.TileGridPosition.X + 1 == otherTile.TileGridPosition.X)
{
switch (thisTile.Orientation.ToArrayTileOrientation())
{
case ArrayTileOrientation.BottomUp:
return(thisTile.Name.CheckIfFacesMatches(otherTile.Name, TileFace.Right, TileFace.Right));
case ArrayTileOrientation.TopDown:
return(thisTile.Name.CheckIfFacesMatches(otherTile.Name, TileFace.Left, TileFace.Left));
default:
throw new ArgumentException("Unknown TileOrientation.");
}
}
// other tile is left of this tile
if (thisTile.TileGridPosition.Y == otherTile.TileGridPosition.Y && thisTile.TileGridPosition.X - 1 == otherTile.TileGridPosition.X)
{
switch (thisTile.Orientation.ToArrayTileOrientation())
{
case ArrayTileOrientation.BottomUp:
return(thisTile.Name.CheckIfFacesMatches(otherTile.Name, TileFace.Left, TileFace.Left));
case ArrayTileOrientation.TopDown:
return(thisTile.Name.CheckIfFacesMatches(otherTile.Name, TileFace.Right, TileFace.Right));
default:
throw new ArgumentException("Unknown TileOrientation.");
}
}
// other tile is top of this tile
if (thisTile.TileGridPosition.Y - 1 == otherTile.TileGridPosition.Y && thisTile.TileGridPosition.X == otherTile.TileGridPosition.X)
{
if (thisTile.Orientation.ToArrayTileOrientation() == ArrayTileOrientation.TopDown)
{
return(thisTile.Name.CheckIfFacesMatches(otherTile.Name, TileFace.Bottom, TileFace.Bottom));
}
else
{
throw new ArgumentException("Tiles got now adjacent faces.");
}
}
// other tile is bottom of this tile
if (thisTile.TileGridPosition.Y + 1 == otherTile.TileGridPosition.Y && thisTile.TileGridPosition.X == otherTile.TileGridPosition.X)
{
if (thisTile.Orientation.ToArrayTileOrientation() == ArrayTileOrientation.BottomUp)
{
return(thisTile.Name.CheckIfFacesMatches(otherTile.Name, TileFace.Bottom, TileFace.Bottom));
}
else
{
throw new ArgumentException("Tiles got now adjacent faces.");
}
}
return(false);
}