 |
Attention | Topic was automatically imported from the old Question2Answer platform. |
 |
Asked By | Grandro |
I have a sub-viewport with a 2D scene instanced as a child. On this scene I draw a grid and I want to be able to click inside of the grid and place a sprite on the tile that I clicked on.
To achieve this I use following code:
func _on_Preview_gui_input(p_event):
._on_Preview_gui_input(p_event)
if p_event.is_action_pressed("Mouse_Left"):
var mouse_pos = a_preview_scene.get_global_mouse_position()
var point = _pos_to_grid_point(mouse_pos)
if a_point_vec != point || a_point == null:
_update_point(point)
else:
_delete_point()
This works fine as long as the window size doesn’t change. I have stretch_mode 2D and aspect keep in the project settings, and if I resize the window to be wider or higher CanvasItem.get_global_mouse_position() starts to give me wrong values. (Note: In this case the size of the root viewport is still the default value, only black bars appear).
This offset caused by the black bars can be easily fixed by doing:
var root = get_tree().get_root()
var bars = (OS.window_size - root.size) / 2
mouse_pos -= bars
I believe you also have to take the viewport stretch into account if Viewport.size_override_stretch is active.
(By calculating the factor sub_viewport.size_override / sub_viewport.size)
But if I now happen to resize the root viewports size, either by making the window size smaller or by switching to full screen (The sub-viewport size stays the same), everything breaks apart and I’m left with a coordinate I have no idea how to make use of. And even if that worked, changing properties of the current camera 2D would break it too.
So I’m asking, how do I always get the correct global mouse coordinates inside a sub-viewport?
Minimal Reproduction Project: Sub-Viewport Global Mouse Position (Issue) – Google Drive
did You try using Viewport.get_mouse_position() ?
Inces | 2022-03-17 17:15
That gives you local viewport screen coordinates, with the top-left of the viewport being 0,0 and the bottom-right viewport.size.
I want global world coordinates that take a Camera2D into account.
Grandro | 2022-03-17 17:26
Can you show the question with the help of a picture?
ramazan | 2022-03-18 09:44
I included two pictures in the original post, but I couldn’t get them to show a preview. Anyways here are the links to the two pictures:
Imgur: The magic of the Internet
Imgur: The magic of the Internet
In the first one you can see the scene structure, but you just have to have a viewport besides the root viewport to encounter the issue.
In the second one you can see the viewport in action (rendering a 2D scene with a grid). If I click inside of the grid I want to change the global position of a Sprite2D to be the global mouse position in the world. But as soon as you resize the window the coordinates start to be off.
I will also include a minimal showcase project so you can see it for yourself.
Grandro | 2022-03-18 10:17
I understood the question, if I’m not mistaken, I’ve seen similar questions, I don’t know the answer, but I think this will help you
ramazan | 2022-03-18 11:40