Allow TileMap's get_surrounding_tiles method to return either side tiles or side and corner tiles

[amifelipek]

In Godot 4 the TileMap node has this method called get_surrounding_tiles which is great but it would be nice to be able to get either the side tiles (it's already doing this) or to return all the 8 tiles around the given position.

The way I found around this problem was to use the get_neighbor_cell method, with this piece of code can get the corner tiles that get_surrounding_tiles doesn't gives us:

var top_left : Vector2i = tile_map.get_neighbor_cell(position, TileSet.CELL_NEIGHBOR_TOP_LEFT_CORNER)
var top_right : Vector2i = tile_map.get_neighbor_cell(position, TileSet.CELL_NEIGHBOR_TOP_RIGHT_CORNER)
var bottom_left : Vector2i = tile_map.get_neighbor_cell(position, TileSet.CELL_NEIGHBOR_BOTTOM_LEFT_CORNER)
var bottom_right : Vector2i = tile_map.get_neighbor_cell(position, TileSet.CELL_NEIGHBOR_BOTTOM_RIGHT_CORNER)

Having something like get_surrounding_tiles(position, TileSet.SIDES) and get_surrounding_tiles(position, TileSet.SIDES_AND_CORNERS) would be really nice!

[amifelipek]

godotengine/godot#58140 does exactly that!