World Locking Tools for Unity

Significant changes

Update to FrozenWorld Engine DLL v0.5.3
• Fixes issue that causes Frozen Space to drift slowly away.

Enable serialization of IOrienter set from script on SpacePinOrientable. Issue #47.

Allow explicit orientation setting on first auto-oriented SpacePinOrientable.

• This allows the first pin set to fully specify position and coarse orientation.
• Subsequently set pins will refine the orientation as implied by relative positions.

3-DOF implicit orientation computation.

• Allow orientation computed from relative positions to rotate about all 3 axes, not just gravity vector Y.
• Most useful with aligning sub-scenes, rather than the global Frozen Space.
• Use OrienterThreeBody, rather than parent class Orienter.

Independent alignment sub-scenes.

• AlignmentManagers (AM) decoupled so multiple may exist alongside the global one owned by WorldLockingManager.
• Independent AMs can pin sub-trees within the scene graph to physical features. See AlignSubtree script.
• For an example on its use, see https://github.com/microsoft/MixedReality-WorldLockingTools-Samples/tree/master/Advanced/AlignSubScene

Enhancements, corrections, and additions to documentation throughout.