Expose global transform properties in Node2D, Node3D and Control

[Calinou]

This can be used to view and assign global transform in the inspector. This is useful to quickly move a node back to the origin regardless of its node hierarchy, or view its current global transform in the live scene debugger.

The following properties are now exposed:

• Node2D:
  • Global Position
  • Global Rotation
  • Global Scale
  • Global Skew
• Node3D:
  • Global Position
  • Global Rotation
  • Global Basis
• Control:
  • Global Position

The basic functionality seems to work OK from my testing. However, there's an issue with this error being spammed about 162 times when you open the editor, or even when you use --doctool:

ERROR: Condition "!is_inside_tree()" is true. Returning: Transform3D()
   at: get_global_transform (./scene/3d/node_3d.cpp:346)

This does not occur with Node2D and Control.

Preview

Subgroups are collapsed by default. Here, I expanded them to take the screenshot.

Node2D	Node3D	Control

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• This closes Add Global Position to the inspector (for Control/Node2D) godot-proposals#1657.

[AdriaandeJongh]

Could you post a screenshot of how the inspector looks with this change?

I can also imagine a toggle icon somewhere, that toggles the UI between global and local transform values.

[Mickeon]

Having both Local and Global Transform always visible in the Inspector at the same time sounds like trouble.

[KoBeWi]

• That's doubling the properties:
  
  Maybe globals could be in their own Global sub-section?

• If this is going to be exposed, the description needs improvement.
  

• Changing global rotation (2D) will modify global scale and you can't even revert it:

godot.windows.editor.dev.x86_64_Hsmada8uD0.mp4

I know it's expected, but we'll likely get bug reports about it. Maybe it should be noted in the documentation at least.

• Global rotation in 3D doesn't have sliders:
  
• When you change rotation mode to Quaternion, there is no global one:
  
• There is no global scale.

[Calinou]

• Changing global rotation will modify global scale and you can't even revert it:

This is due to #74162. There's a PR to fix this: #90584

• When you change rotation mode to Quaternion, there is no global one:

There is no global quaternion property yet, but it should be possible to add one.

• There is no global scale.

There's no global scale property in Node3D yet, but since we already have a global_scale() method in that class, we can't expose a property with the same name.

[KoBeWi]

There's no global scale property in Node3D yet, but since we already have a global_scale() method in that class, we can't expose a property with the same name.

Ah, I didn't notice it's a method .-.

This is due to #74162. There's a PR to fix this: #90584

It's in 2D though.

[Jordyfel]

IMO globals being in a subcategory would be better

[JoNax97]

I vote for a toggle. I think having local and global properties visible and editable at the same time (even if they're collapsed by default) will confuse new users.

[Calinou]

• If this is going to be exposed, the description needs improvement.

I've improved the descriptions somewhat. Let me know if more could be added.

• Global rotation in 3D doesn't have sliders:

Fixed (see OP for screenshots).

IMO globals being in a subcategory would be better

I've amended the PR to use a Global Transform subcategory for all 3 nodes. This is indeed much more tidy while preserving the ability to edit those values.

There's an issue with error spam on startup I need to figure out a solution to, so I'm marking the PR as draft.