Why does this var come up as "Nil"

Help
,
1

Godot Version

v4.2.1.stable.mono.official [b09f793f5]

Question

Its meant to be a function that can return info about the gridmap (map) but no matter what I do the var always comes up as Nil

func get_save_array():
	# Define the 3 arrays to fill
	var poses = Array()
	var ids = Array()
	var orientations = Array()

	# For every block in GridMap get its info and append it to the arrays
	for i in map.get_used_cells():
		poses.append(i)
		ids.append(map.get_cell_item(i))
		orientations.append(map.get_cell_item_orientation(i))
	
	# Create an array of the other arrays
	var griditems = Array()
	griditems.append(poses)
	griditems.append(ids)
	griditems.append(orientations)
2

Are the map a gridmap node? Did you reference the gridmap to the var map?

func _ready():
   map = $Gridmap // or another path
3

Yep! Did that. I tried to refrence it by both print(type_string(griditems)) and by using it as an array, any of which return a similar error: Error calling utility function "type_string()": Nil

4

Btw, the script is inside the gridmap

5

then try change map. to self.

6

None of the functions used to get cell info are defined in self.

7

self. is mean GridMap

since you write that the script is inside GridMap, you just need to write

for i in self.get_used_cells():

or

for i in get_used_cells():
8

Dont know what’s up with the error but I can access its contents using this (bad) source code: PasteBin

9

Also thats because I was extending Node rather Than GridMap

10

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