Bring back per-viewport localview. This is based on Blender 2.79.
We have a limit of 16 different local view viewports.
We are using both the numpad /, as well as the regular /.
Missing features:
* Hack to make sure lights are always visible.
* Make rendered mode with external engines to support this as well
(probably just need to support this in the RNA iterators).
* Support over 16 viewports by taking existing viewports out of local view.
The code can use a cleanup pass in the future to unify the test to see
if an object is visible (or we can use TESTBASE in more places).
Use the 2x spin tool has 2x handles to control normal direction,
dragging either handle backwards now reverses normals.
Previously it was common for the spin result to have normals
flipped the wrong way.
- Now the spin tool has a persistent gizmo.
- Uses scene orientation, with additional view orientation.
- Uses the cursor center, ignoring the pivot since the
selection center is rarely useful.
- Disable most of the redo gizmo's for now since they overlap,
only allow adjusting the angle.
Note: mixing new action with adjusting previous is confusing,
we'll want to have design guidelines regarding this.
There are now 3 categories in the overlay popover:
- Navigation
- Active (camera, lamp... etc)
- Tool (manipulator)
The user preference for mini axis now controls if the mini axis
displays minimal or a full-interactive widget.
Part of design: T55863
