2.3.3.3.64. NXcg_point_set¶
Status:
base class, extends NXcg_primitive_set
Description:
Computational geometry description of a set of points. ...
Computational geometry description of a set of points.
Points may have an associated time value. Users are advised though to store time data of point sets rather as instances of time events, where for each point in time there is an NXcg_point_set instance which specifies the points’ locations.
This is a frequent situation in experiments and computer simulations, where positions of points are taken at the same point in time (real time or simulated physical time). Thereby, the storage of redundant time stamp information per point is considered as obsolete.
Symbols:
The symbols used in the schema to specify e.g. dimensions of arrays.
d: The dimensionality.
c: The cardinality of the set, i.e. the number of points.
- Groups cited:
none
Structure:
position: (optional) NX_NUMBER (Rank: 2, Dimensions: [c, d]) {units=NX_ANY}
Coordinates of the points.
time: (optional) NX_NUMBER (Rank: 1, Dimensions: [c]) {units=NX_TIME}
(Elapsed) time for each point. ...
(Elapsed) time for each point.
If the field time is needed contextualize the time_offset relative to which time values are defined. Alternative store timestamp.
timestamp: (optional) NX_DATE_TIME (Rank: 1, Dimensions: [c])
ISO8601 with local time zone offset for each point.
time_offset: (optional) NX_DATE_TIME
ISO8601 with local time zone offset that serves as the reference ...
ISO8601 with local time zone offset that serves as the reference for values in the field time.
Hypertext Anchors¶
List of hypertext anchors for all groups, fields, attributes, and links defined in this class.
