grid location of center tile.
if no, include tiles to the north, south, east, and west only. if yes, also include northwest, northeast, southwest, and southeast.
import std.algorithm : equal; auto myGrid = rectGrid([ [ 00, 01, 02, 03, 04 ], [ 10, 11, 12, 13, 14 ], [ 20, 21, 22, 23, 24 ], ]); assert(myGrid.adjacentTiles(RowCol(0,0)).equal([01, 10])); assert(myGrid.adjacentTiles(RowCol(1,1)).equal([01, 10, 12, 21])); assert(myGrid.adjacentTiles(RowCol(2,2)).equal([12, 21, 23])); assert(myGrid.adjacentTiles(RowCol(2,4)).equal([14, 23])); assert(myGrid.adjacentTiles(RowCol(0,0), Diagonals.yes) .equal([01, 10, 11])); assert(myGrid.adjacentTiles(RowCol(1,1), Diagonals.yes) .equal([00, 01, 02, 10, 12, 20, 21, 22])); assert(myGrid.adjacentTiles(RowCol(2,2), Diagonals.yes) .equal([11, 12, 13, 21, 23])); assert(myGrid.adjacentTiles(RowCol(2,4), Diagonals.yes) .equal([13, 14, 23]));
Return all tiles adjacent to the tile at the given coord (not including the tile itself).