1 Definition
An Item representing an Object’s orientation, velocity, and acceleration.
2 Functional Requirements
- The Orientation of an Object is that of the principal axis of an Object.
- The following media types are supported: Audio; Visual; Audio-Visual; Haptic; Smell; RADAR; LiDAR; Ultrasound.
- Error is the estimated error in the measured value of each of Orientation, OrientVelocity, and OrientAccel.
- Error is assumed to be the same for the three components of each value set.
3 Syntax
https://schemas.mpai.community/OSD/V1.1/data/Orientation.json
4 Semantics
Table 1 provides the semantics of the components of Orientation. It should be noted that the Euler angles are indicated by (α,β,γ).
Table 1 – Semantics of Orientation
| Label | Description |
| Header | Orientation Header |
| – Standard-Orientation | The characters “OSD-OOR-V” |
| – Version | Major version – 1 or 2 characters |
| – Dot-separator | The character “.” |
| – Subversion | Minor version – 1 or 2 characters |
| MInstance | ID id Virtual space Orientation refers tu |
| ObjectOrientationID | Identifier of Object Orientation. |
| General | Set of general data |
| – CoordType | One of Cartesian, Spherical, Geodesic, Toroidal. |
| – ObjectType | One of Digital Human, Generic. |
| – MediaType | One of Speech, Audio, Visual, Audio-Visual, Haptic, Smell, RADAR, LiDAR, Ultrasound. |
| – Precision | One of single precision, double precision |
| Orientation | |
| – Orient (α,β,γ) | Array (in degrees) |
| – OrientAccuracy (α,β,γ) | Array (in degrees) |
| Velocity of Orientation | |
| – OrientVelocity (α,β,γ) | Array (in degrees/s) |
| – OrientVelocityAccuracy (α,β,γ) | Array (in degrees/s) |
| Acceleration of Orientation | |
| – OrientAccel (α,β,γ) | Array (in degrees/s2) |
| – OrientAccelAccuracy (α,β,γ) | Array (in degrees/s2) |
| Trace | ID and time of AIM producing Orientation |
| DescrMetadata | Descriptive Metadata |
