great work! now that the code is already here it might be worth looking into having this style of point on sphere projection for calculating locked rotation axis adjustments as well. (like in maya for example)

it's very intuitive to use compared to the current gizmo behavior (which will be unstable when dragging near the origin)

Thanks!

This mode should not be the default. It significantly breaks the behavior from versions 4.0 through 4.6.

The priority assigned to the trackball's grabbing area is too high, severely compromising usability when selecting multiple points iteratively for transformation in Path3DEditor or SkeletonEditor. See also #115608 (comment).

If this PR is merged, a toggle button for the trackball should probably be added to viewport option tool area. That option should also handle free dragging mode whether it behaves move or rotation, as mentioned by @KoBeWi :

Note that this also changes the default free dragging behavior of Transform Mode, from move to rotate, idk which one should be preferable.

Are there any plans to make this work with the Begin Transformation hotkeys too?
When using Begin Transformation Rotation hotkey it defaults to the normal rotation over the viewplane.

I tried the new PR with the Node3D trackball toggle button, but it doesn't seem to affect the Begin Rotation Transformation hotkey.
Double pressing the hotkey like blender's RR would be nice. But even if it just worked with the toggle in the other PR would already be awesome.

Also, great work, I've been wanting this feature for years.

@GustJc see link for PR above.