/// <summary>
/// Runs a flood-fill algorithm with the passed co-ordinates of the root.
/// Returns an enumerable list of points based on the results.
/// </summary>
/// <param name="tileset">Tileset to replace with.</param>
/// <param name="selection">Tile selection to replace with.</param>
/// <param name="x">X co-ordinate of the root tile.</param>
/// <param name="y">Y co-ordinate of the root tile.</param>
/// <returns>An enumerable list of points.</returns>
public List<Point> FillCache(Tileset tileset, PointSelection selection, int x, int y)
{
if (x < 0 || x > Width - 1 || y < 0 || y > Height - 1) return null;
_tileCache = new List<Point>();
_cacheMap = new FillTile[Width, Height];
for (var x2 = 0; x2 < Width; x2++)
{
for (var y2 = 0; y2 < Height; y2++)
{
var tile = SelectedLayer.Tiles[x2, y2];
_cacheMap[x2, y2] = new FillTile(tile.Tileset, tile.SrcX, tile.SrcY, tile.Terrain);
}
}
_tileChecked = new bool[Width, Height];
var point = selection.GetTopLeftMostPoint();
var replacementTile = new FillTile(tileset.ID, point.X, point.Y, 0);
var currTile = GetFillCacheTile(x, y, replacementTile);
var originalFillTile = new FillTile(currTile.Tileset, currTile.X, currTile.Y, currTile.Terrain);
FillCacheTiles(originalFillTile, replacementTile, x, y);
return _tileCache;
}
public void Fill(Tileset tileset, PointSelection selection, int x, int y)
{
if (x < 0 || x > Width - 1 || y < 0 || y > Height - 1) return;
using (UndoRedoArea.Start("Fill Tool"))
{
_tileChecked = new bool[Width, Height];
_tileMap = SelectedLayer.Tiles;
_tilesToCache = new List<Point>();
var tile = selection.GetTopLeftMostPoint();
var replacementTile = new FillTile(tileset.ID, tile.X, tile.Y, 0);
var currTile = GetFillTile(x, y, replacementTile);
var originalFillTile = new FillTile(currTile.Tileset, currTile.SrcX, currTile.SrcY, currTile.Terrain);
FillTiles(currTile, originalFillTile, replacementTile);
UndoRedoArea.Commit();
}
}