How to make a tileset editor in game?

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:information_source: Attention Topic was automatically imported from the old Question2Answer platform.
:bust_in_silhouette: Asked By Hui

How can i make a tileset editor in game?
i am trying to do this but it doesn’t quiet work:
func _input(event):
if Input.is_action_just_pressed(“click”):
Global.click_pos = get_global_mouse_position
func _physics_process(delta):
$Tilemap.set_cell(Global.click_pos.x , Global.click_pos.y , 0)

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:bust_in_silhouette: Reply From: Zylann

You have to convert mouse coordinates into tilemap coordinates using world_to_map: TileMap — Godot Engine (stable) documentation in English

Note, world_to_map does not actually take a world position, but a position relative to the origin of the Tilemap node. However it should be fine if it is at (0,0).

Assuming your tilemap is at the origin:

func _input(event):
	if Input.is_action_just_pressed("click"):
		Global.click_pos = get_global_mouse_position()

func _physics_process(delta):
	var cell_pos = $Tilemap.world_to_map(Global.click_pos)
	$Tilemap.set_cell(cell_pos.x, cell_pos.y, 0)

Also, you don’t need a global variable and two separate functions to set a cell in a tilemap. You can do it all in _input and use set_cellv as a shortcut:

func _input(event):
	if Input.is_action_just_pressed("click"):
		var cell_pos = $Tilemap.world_to_map(get_global_mouse_position())
		$Tilemap.set_cellv(cell_pos, 0)

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