/// <summary>
/// Select 3 tiles based on the touch position
/// </summary>
void SelectTileGroup(Vector3 centerPos)
{
_gameState = GameState.selecting;
debugText.text = "";
debugText1.text = "";
//Casts a circle with the touch position as origin.
List <Collider2D> candidateTiles = Physics2D.OverlapCircleAll(centerPos, tileSize.x).ToList();
//Gets the closest 3 tiles from where the circle was cast.
var closestTiles = candidateTiles.OrderBy(t => (t.transform.position - centerPos).sqrMagnitude)
.Take(3)
.ToArray();
//Check the edges and make sure the 3 selected tiles are not in line(3 same rows, 3 same columns).
var column = closestTiles.First().GetComponent <Tile>().column;
var row = closestTiles.First().GetComponent <Tile>().row;
//If same column
if (closestTiles.All(x => x.GetComponent <Tile>().column == column))
{
candidateTiles.Remove(closestTiles[2]);
closestTiles = candidateTiles.OrderBy(t => (t.transform.position - centerPos).sqrMagnitude)
.Take(3)
.ToArray();
}
//if same row
if (closestTiles.All(x => x.GetComponent <Tile>().row == row))
{
candidateTiles.Remove(closestTiles[2]);
closestTiles = candidateTiles.OrderBy(t => (t.transform.position - centerPos).sqrMagnitude)
.Take(3)
.ToArray();
}
List <Tile> selectedTiles = new List <Tile>(3);
tileGroup = new TileGroup();
tileGroupCenterObj.position = Helpers.FindGroupCenter(closestTiles);
for (int i = 0; i < 3; i++)
{
selectedTiles.Add(closestTiles[i].GetComponent <Tile>());
selectionBorders[i].transform.position = closestTiles[i].transform.position;
}
tileGroup.tiles = selectedTiles;
//Reorder selected tiles to rotate them easier later.
tileGroup.OrderTiles();
_gameState = GameState.idle;
}
/// <summary>
/// 2 overload functions for checking a single tile
/// and checking a selection group.
/// </summary>
public TileMatches CheckTileForMaches(TileGroup group)
{
TileMatches matches = new TileMatches();
//_gameState = GameState.matching;
foreach (var go in group.tiles)
{
matches.AddObjectRange(CheckTileForMaches(go.gameObject).MatchedTiles);
}
return(matches);
}