Terminology
Markers can correct for drift in XYZ only to preserve hologram verticality using the device gyroscope, or for full re-orientation of the model with 6 degrees of freedom (6DoF).
In Twinbuild, XYZ correction is called Orient to Site. 6DoF orientation is called Orient to Object. Orientation modes are set in the Marker options dialog in the Twinbuild web viewer.
In Fologram, XYZ correction is called Alignment - Z. 6DoF orientation is called Alignment - Free. Orientation modes are set and saved on the Rhino doc with the
XRProperties command.Use cases
If mixed reality is used for green field construction, set out or fabrication from scratch then use XYZ orientation to ensure that holograms remain perfectly level during set out. If mixed reality is used for fabrication and set out on or with existing objects where precise orientation is not known ahead of time or is expected to change, use 6DoF orientation to ensure hologram orientation can be updated dynamically to match the precise orientation of physical objects.
XYZ orientation is useful in scenarios where you want to ensure that your model is guaranteed not to rotate around X or Y axes, for instance if placing a model on a somewhat uneven flat surface (construction sites etc - see below).
6DoF orientation uses detected Marker positions to correct the XYZ position and rotation of your model. Object space orientation is useful for scenarios where you are wanting to locate models on physical objects that may be in an unknown or changing position or orientation (see example below).
