Collision seems to be messed up

-Bread-

Hello everyone,

right now i am trying to learn godot and following this tutorial:

So i set up a tile map, included in my scene and now in want to make a build preview. This preview also informs the player wether the current position is valid to build or not. But it seems that the tiles are offset in the y-Axis. Here a few pictures for clarification:
(red tower = cant build there; green = valid build pos)

Heres the code i am using to detect collision with the "TowerExclusion"-Layer

func update_tower_preview() -> void:
	var mouse_pos = get_global_mouse_position()
	var current_tile = map_node.get_node("TowerExclusion").world_to_map(mouse_pos)
	var tile_pos = map_node.get_node("TowerExclusion").map_to_world(current_tile)

	if map_node.get_node("TowerExclusion").get_cellv(current_tile) == -1:
		get_node("UI").update_tower_preview(tile_pos, "ad54ff3c")
		build_valid = true
		build_location = tile_pos
	else:
		get_node("UI").update_tower_preview(tile_pos, "adff4545")
		build_valid = false

cybereality

It probably has to do with the origin or center positions. Each tile has a center (can be in the corner, or the middle, etc.) and each sprite also has a center (can be anywhere). So you have to make sure they are using the same convention. When you click on a sprite, the green cross sign is the center, and you can just move it the the position you need. For the tilemap you will have to look at the settings on the tilemap, it is called tile origin.