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Asked By | zachMade |
I have a parent Node called TileGrid which populates automatically with a bunch of child Nodes called Tile. To help me manage the children I have created a 2D Array called grid_tiles[][] which contains references to each child Node.
When _ready() runs on my TileGrid it first creates all the child Nodes, then it adds them each to the grid_tiles[][] array. Finally, it’s supposed to set the Z-Index for each Tile… but it doesn’t work! I rigged it so that when I hover the mouse over a Tile it prints the z_index to the console… and all of them read as 0.
So, with both of these taking place within TileGrid._ready(), this line does NOT work:
grid_tiles[x][y].node.z_index = new_z
… but this DOES work:
grid_tiles[x][y].node.modulate = Color(1,.5,.5,.5)
At no point am I receiving any errors.
If I rig my hover-over-tile code I can get it to modify the Z-Index… so I assume somewhere between TileGrid calling _ready and when I’m able to start using the mouse the Z-Indexes are getting reset back to 0.
Can anyone help me understand when and why the z_index values are getting reset, and at what point that is happening so I can move my code line somewhere where the Z-Index changes will actually stick?
Thanks in advance.
Can you post your node structure for the Tile object? Can you paste the setup code around grid_tiles[x][comment0-y].node.z_index = new_z and the code you are using to get the z_index when you hover?
Have you verified in the remote scene tree that the z_index value isn’t set properly?
Overview of debugging tools — Godot Engine (stable) documentation in English
timothybrentwood | 2021-05-18 23:13
The Nodes within Tile look like this:
- Tile (Node2D)
- Textures (Node2D)
- Background (Sprite)
- WireMesh (Node2D)
- Area2D
- CollisionPolygon2D
- BorderLines (Node2D)
- Area2D
(… the linespacing looks really wrong in the list above, but not sure if its this Donut Theme or if my Markdown is wrong)
I have this code in TileGrid._ready():
for grid_y in grid_size_y:
for grid_x in grid_size_x:
hex_tile_node = hex_tile_scene.instance()
hex_tile_node.grid_location.x = grid_x
hex_tile_node.grid_location.y = grid_y
hex_tile_node.position.x = (grid_x * row_offset.x) + (grid_y * column_offset.x)
hex_tile_node.position.y = (grid_x * row_offset.y) + (grid_y * column_offset.y)
add_child(hex_tile_node)
for grid_x in grid_size_x:
grid_tiles.append([])
for grid_yy in grid_size_y:
grid_tiles[grid_x].append(0)
for child in self.get_children():
if child.is_in_group('TILES'):
grid_tiles[child.grid_location.x][child.grid_location.y] = {'node': child, 'grid_x': child.grid_location.x, 'grid_y': child.grid_location.y, 'material': '_EMPTY'}
var new_z = 10000
for y in grid_size_y:
for x in grid_size_x:
grid_tiles[x][y].z_index = new_z
grid_tiles[x][y].node.update_z_index(new_z)
grid_tiles[x][y].node.z_index = new_z
new_z -= 1
I added a .update_z_index() function to Tile… but that doesn’t work either. It does, however, print the current .z_index for the selected Tile… and it is always 0.
Now, as for getting Z-Index to work with hover:
You’ll see that I have a CollisionPolygon2D inside the Tile objects; if I go to their _on_Area2D_mouse_entered() function and add:
z_index += 10
then when I put my mouse over the Tile lo; it pops up above all the other Tiles and I can see in the console (courtesy of print(z_index)) that the Z-Index has risen.
I don’t seem to be able to use the Remote Scene Tree to investigate, as there are no Tiles actually in the Scene until TileGrid._ready() executes and spawns them.
zachMade | 2021-05-19 00:10
I think this might be happening because your Tiles aren’t unique.
- Navigate to your
Tilescene in the editor and select the root node
of the scene in theScenepanel. - Then go to the
Inspectorpanel (default right side) and click the little screw driver/wrench button. - In the pop-up menu press the
Make Sub-Resources Uniqueoption.
Then try to re-run your game and see if that fixes it.
timothybrentwood | 2021-05-19 00:28
Nope, no dice 
zachMade | 2021-05-19 00:33
Is the _on_Area2D_mouse_entered() function connected to the Tile node’s script?
Just for kicks change:
grid_tiles[x][y].z_index = new_z
to
grid_tiles[x][y].set_deferred("z_index", new_z)
timothybrentwood | 2021-05-19 00:45
Yes, _on_Area2D_mouse_entered() is connected to the script for Tile.
Unfortunately, .set_deferred() didn’t work either.
zachMade | 2021-05-19 01:53