Implement 3D editing gauges for editing joint and bone properties

[Lathreas]

Feature proposal

Rationale

Editing properties of bones and joints by editing numbers is not intuitive and hard to work with. Certain properties, such as the "hinge joint start angle" or "hinge joint end angle" are much better represented visually, in the 3D view. Blender allows us to write custom 3D gauges to make editing more intuitive.

Description

The following mockup shows the design proposal for defining the hinge joint's "start" and "end" angle, which in this case becomes much more visually intuitive as meaning the angle at which the arc starts and ends.

The user should be able to grab the end points (which are just UI elements) and drag the points around to change the hinge joint's angles. Similarly, the hinge joint's width should be changeable with a visual 3D handle.

Priority

Low