private HashSet <Vector2i> ChunkEdge(HashSet <Vector2i> cellsInBiome, CellInfoCom[,] cells, long edgeSeed) { var edges = new HashSet <Vector2i>(); foreach (var cell in cellsInBiome) { var adjacent = Utility.GetAdjacentSquares(cell.X, cell.Y, cells); if (adjacent.Any(i => !cellsInBiome.Contains(i))) { var nextSeed = edgeSeed + (((cell.X * 1691275049) + (cell.Y * 76045141)) % 3153608179); Utility.AddAll(edges, GrowEdge(cell, cellsInBiome, adjacent, cells, nextSeed)); } } return(edges); }