- Added ScreenPositionSlotControlView and its style element (USS).
- Moved ScreenSpaceType enum definition to ScreenSpaceType.cs and added
ScreenSpaceTypeExtensions that provides extension methods for the enum.
- Updated the existing implementation to work with
ScreenPositionSlotControlView.
- Separate Master node requirements into per-slot stages
- Add shader stage option to IMayRequire interfaces
- Remove uneeded intermediate spaces from surface description
- Change orthonormal basis to world