Raycast2D is not returning the TileMapLayer.get_cell_atlas_coords() when Player faces left direction

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1

Godot Version

4.5.1

Goal

I’m building a Mining Game prototype similar to what Aarimous did in his Youtube channel. I want to use TileMapLayer to place mineable ground blocks. Each ground block has a different type (ex. dirt, iron, gold, etc.). I want the Player to detect that there is a ground block next to them and then mine it.

Problem

I’m trying to use Raycast2D to detect a TileMapLayer so I can find the map position and get the corresponding cell that is at the atlas_coordinates. When the Player faces “right” or “down” I get correct atlas_coordinates for the Ground blocks.

However when I face the Player the the “left”, collider.get_cell_atlas_coords results in a (-1,-1) which means that the result is “No cell exists.”

Screenshot 2026-01-03 203510
Screenshot 2026-01-03 2035103840×2080 512 KB

Player Character code

#Player Character code for changing Sprite direction and PickaxeRayCast direction
func _physics_process(delta: float) -> void:
	# Change direction based on Input left or right
	if Input.is_action_just_pressed("left"):
		$AnimatedSprite2D.flip_h = true
		$PickaxeRayCast.set_target_position(Vector2(-12.0,0.0))
	
	if Input.is_action_just_pressed("right"):
		$AnimatedSprite2D.flip_h = false
		$PickaxeRayCast.set_target_position(Vector2(12.0,0.0))

	if Input.is_action_just_pressed("down"):
			$PickaxeRayCast.set_target_position(Vector2(0.0,12.0))

PickaxeRayCast code

#PickaxeRayCast code for trying to detect a TileMapLayer
extends RayCast2D

#@onready var pickaxe = self
var collider


func _process(_delta: float) -> void:
	if self.is_colliding():
		print(str(self.is_colliding()) + " is colliding.")
		if self.get_collider() is TileMapLayer:
			collider = self.get_collider()
			print(str(collider) + " is collider")
		var map_position = collider.local_to_map(self.get_collision_point())
		print(str(map_position) + " is map position")
		print(collider.get_cell_atlas_coords(map_position))
	else:
		print("Not colliding")

Clearly a cell exists so either I am implementing Raycast2D incorrectly or using the wrong tool for the job. I have searched the forums and Google and haven’t encountered another person having the problem.

  • What am I doing wrong?
  • What do I need to change to get the behavior I want?
2

Problem solved by u/godot_lover from Reddit: https://www.reddit.com/r/godot/comments/1q3fv4c/comment/nxknmna/?utm_source=share&utm_medium=web3x&utm_name=web3xcss&utm_term=1&utm_content=share_button

From comment:

Literally, it’s an edge case. Since local_to_map floors the coordinates, hitting the right side of a block puts the collision point exactly on the border (e.g., 16.0), so it incorrectly rounds to the empty neighbor cell. You just need to nudge the point slightly “into” the wall before checking.

Try this:

Subtract the normal to push the point inside the collider var map_position = collider.local_to_map(self.get_collision_point() - self.get_collision_normal())

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