# Position tiles outside of TileMap grid cells

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Hi there,
I am currently trying to create a clone of the classic Donkey Kong arcade game. Unfortunately, I am struggling with the platform elements, when it comes to ascending sections. It seems like the original game took the same tile and just positioned it one pixel higher than the previous one.
My attempt was to use a TileMap with an 8x8 grid size. I hoped that there is a way to position tiles outside of the grid cell boundaries to achieve the same effect as described above, but I did not find any.
I am grateful for any suggestion on how to handle this. Maybe the attempt to solve this via a TileMap is not suitable?

you can draw outside the edges
here is a function i use to draw an edge around the outside of a generated tilemap
first tile i place is at -1, -1

``````func _drawEdge() -> void:
var minY := rect.position.y - 1
var maxY := rect.end.y
var minX := rect.position.x - 1
var maxX := rect.end.x
for y in range(minY, maxY + 1):
for x in range(minX, maxX + 1):
if x == minX or x == maxX or y == minY or y == maxY:
if x == minX and y == minY: # nw
_edge.set_cell(x, y, Tile.EdgeOutsideCorner, false, false, false, Vector2(1, 0))
elif x == minX and y == maxY: # sw
_edge.set_cell(x, y, Tile.EdgeOutsideCorner, false, false, false, Vector2(2, 0))
elif x == maxX and y == minY: # ne
_edge.set_cell(x, y, Tile.EdgeOutsideCorner, false, false, false, Vector2(0, 0))
elif x == maxX and y == maxY: # se
_edge.set_cell(x, y, Tile.EdgeOutsideCorner, false, false, false, Vector2(3, 0))
elif x == minX: # w
_setRandomTile(_edge, x, y, Tile.EdgeOutside, false, Random.nextBool(), true)
elif x == maxX: # e
_setRandomTile(_edge, x, y, Tile.EdgeOutside, true, Random.nextBool(), true)
elif y == minY: # n
_setRandomTile(_edge, x, y, Tile.EdgeOutside, Random.nextBool(), false, false)
elif y == maxY: # s
_setRandomTile(_edge, x, y, Tile.EdgeOutside, Random.nextBool(), true, false)
elif (x == minX + 1) or (x == maxX - 1) or (y == minY + 1) or (y == maxY - 1):
if x == minX + 1 and y == minY + 1: # nw
_setRandomTile(_edge, x, y, Tile.EdgeInsideCorner, false, false, false)
elif x == minX + 1 and y == maxY - 1: # sw
_setRandomTile(_edge, x, y, Tile.EdgeInsideCorner, false, true, false)
elif x == maxX - 1 and y == minY + 1: # ne
_setRandomTile(_edge, x, y, Tile.EdgeInsideCorner, true, false, true)
elif x == maxX - 1 and y == maxY - 1: # se
_setRandomTile(_edge, x, y, Tile.EdgeInsideCorner, true, true, false)
elif x == minX + 1: # w
_setRandomTile(_edge, x, y, Tile.EdgeInside, false, Random.nextBool(), true)
elif x == maxX - 1: # e
_setRandomTile(_edge, x, y, Tile.EdgeInside, true, Random.nextBool(), true)
elif y == minY + 1: # n
_setRandomTile(_edge, x, y, Tile.EdgeInside, Random.nextBool(), false, false)
elif y == maxY - 1: # s
_setRandomTile(_edge, x, y, Tile.EdgeInside, Random.nextBool(), true, false)
``````

Thanks for the support. May I ask where you add this function?

JuzamDjinn | 2020-09-17 05:44

well, i call it immediately after generating a map…
just call set_tile(-1, -1) from _ready to test it right?

you can see the edge in action and the code here:
gotm.io | gotm.io

rakkarage | 2020-09-17 13:35

I tried to load a map. Thanks for the example but I think I am good with the StaticBody2D approach.

JuzamDjinn | 2020-09-19 07:55