Godot: RemoteTransform2D behavior is broke

[henriiquecampos]

Godot version: 3.0.2

OS/device including version: Windows 10 with GTX 660 @ v.388.13

Issue description:

When setting the remote_path of RemoteTransform2D the transform doesn't update until an Edit CanvasItem notification is thrown on the console. But there's more.

If you set the use_global_coordinates to true the transform will only update once the transform is set (below I'm releasing the mouse click after the the terminal report Edit CanvasItem and only then the remote_node transform is updated). This means that if you drag the RemoteTransform2D the remote_node won't have its transform updated.

This is also true in runtime, but there it doesn't update at all, so it is impossible to dynamically change the remote_node of a RemoteTransform2D. The last statement is also true even if use_global_coordinates is true. This leads to an impossibility to change the remote_node dynamically, so mechanics like:

grabbing an object in the scene

Are inviable to implement, at least without hardcoding workarounds

Steps to reproduce:
Create a scene with the follow hierarchy:

• Node2D
  
  
  
  • Sprite
  
  
  • RemoteTransform2D
  
  

And try out the behaviors reported as shown in the respective .gif images

[henriiquecampos]

ps: not sure if:

the remote_node is at the same level in the hierarchy of the RemoteTransform2D

is a condition for the last behavior.

[groud]

Testing a little bit, it seems that everything works fine until you deactivate the use_global_coordinates.
Maybe it's a cache problem, I'm investigating.

Edit: In fact the NOTIFICATION_TRANSFORM_CHANGED is not called correctly.

[henriiquecampos]

The scaling issue is the most problematic one, did #17690 fix it too, @groud ?

[groud]

The scaling issue is the most problematic one, did #17690 fixes it too, @groud ?

No, could you move that to another issue ?

[henriiquecampos]

Done :3