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
| Header | N1 Bytes | Orientation Header |
| – Standard-Orientation | 9 Bytes | The characters “OSD-OOR-V” |
| – Version | N2 Bytes | Major version – 1 or 2 characters |
| – Dot-separator | 1 Byte | The character “.” |
| – Subversion | N3 Bytes | Minor version – 1 or 2 characters |
| MInstance | N4 Bytes | ID id Virtual space Orientation refers tu |
| ObjectOrientationID | N5 Bytes | Identifier of Object Orientation. |
| General | N6 Bytes | Set of general data |
| – CoordType | N7 Bytes | One of Cartesian, Spherical, Geodesic, Toroidal. |
| – ObjectType | N8 Bytes | One of Digital Human, Generic. |
| – MediaType | N9 Bytes | One of Speech, Audio, Visual, Audio-Visual, Haptic, Smell, RADAR, LiDAR, Ultrasound. |
| – Precision | N10 Bytes | One of single precision, double precision |
| Orientation | ||
| – Orient (α,β,γ) | 12/24 Bytes | Array (in degrees) |
| Velocity of Orientation | ||
| – OrientVelocity (α,β,γ) | 12/24 Bytes | Array (in degrees/s) |
| Acceleration of Orientation | ||
| – OrientAccel (α,β,γ) | 12/24 Bytes | Array (in degrees/s2) |
| Errors | ||
| – ErrOrientation | N11 Bytes | Error of Orientation |
| – ErrOrientVelocity | N12 Bytes | Error of OrientVelocity |
| – ErrOrientAccel | N13 Bytes | Error of OrientAccel |
| DescrMetadata | N14 Bytes | Descriptive Metadata |
