ISO/IEC 18023-1:200x(E) — Table 6.294 DRM_Union_Of

Table 6.294 — DRM_Union_Of_Geometry

Property

Description

Class

<DRM Union Of Geometry>

Superclass

<DRM Aggregate Geometry>

Subclass

Definition

An instance of this DRM class is an aggregation of <DRM Geometry Representation> instances specifying a standardized mechanism by which to organize the members that compose the union.

The union_reason field specifies the reason why the <DRM Union Of Geometry> instance was created to organize its components.

The ordering_reason field specifies whether the ordering of the <DRM Geometry Representation> components of the <DRM Union Of Geometry> instance is semantically significant and, if so, what that significance is.

Class diagram

Figure 6.366 — DRM_Union_Of_Geometry

Inherited field elements

Field name	Range	Field data type
unique_descendants		Boolean
strict_organizing_principle		Boolean

Field elements

Field name	Range	Field data type
union_reason		Union_Reason
ordering_reason		Ordering_Reason

Default field values

Default field values for DRM_Union_Of_Geometry

Associated to (one-way) (inherited)

zero or more <DRM Feature Representation> instances, each through the use of a <DRM Base Association Data> link object¹
zero or more <DRM Geometry Hierarchy> instances, each through the use of a <DRM Base Association Data> link object²

Associated to (one-way)

None.

Associated by (one-way) (inherited)

zero or more <DRM Feature Representation> instances, each through the use of a <DRM Base Association Data> link object³
zero or more <DRM Geometry Hierarchy> instances, each through the use of a <DRM Base Association Data> link object⁴
zero or one <DRM Hierarchy Summary Item> instance⁵
zero or more <DRM Reference Surface> instances⁶

Associated by (one-way)

None.

Associated with (two-way) (inherited)

None.

Associated with (two-way)

None.

Composed of (two-way) (inherited)

zero or one <DRM Classification Data> instance
zero or more {ordered} <DRM Property Set Index> instances
zero or more <DRM Property Table> instances
zero or more <DRM Property Table Reference> instances
zero or more <DRM Property Value> instances
zero or one <DRM Reference Surface> instance
zero or more <DRM Sound Instance> instances
zero or more <DRM Base LOD Data> instances
zero or one <DRM Bounding Volume> instance
zero or more <DRM Camera Point> instances
zero or more <DRM Collision Volume> instances⁷
zero or more <DRM Colour> instances
zero or one <DRM Conformal Behaviour> instance
a bounded set of 0..3 <DRM Geometric Centre> instances
zero or more <DRM Geometry Topology Hierarchy> instances
zero or more {ordered} <DRM Image Mapping Function> instances
zero or one <DRM Light Rendering Properties> instance
zero or more <DRM Light Source> instances
zero or one <DRM LSR Transformation> instance⁸
zero or one <DRM Overload Priority Index> instance
zero or one <DRM Perimeter Data> instance
zero or one <DRM Presentation Domain> instance
zero or more <DRM Property Description> instances
zero or one <DRM Rendering Priority Level> instance
zero or one <DRM Rendering Properties> instance
zero or one <DRM Spatial Extent> instance
zero or one <DRM Stamp Behaviour> instance

Composed of (two-way)

zero or more <DRM Reference Vector> instances

Composed of (two-way metadata) (inherited)

zero or one <DRM Time Constraints Data> instance
zero or one <DRM Data Quality> instance
zero or one <DRM Identification> instance

Composed of (two-way metadata)

None.

Component of (two-way) (inherited)

zero or more <DRM Alternate Hierarchy Related Geometry> instances, each through the use of a <DRM Hierarchy Data> link object
zero or more <DRM Animation Related Geometry> instances
zero or more <DRM Classification Related Geometry> instances, each through the use of a <DRM Classification Data> link object
zero or one <DRM Environment Root> instance
zero or one <DRM Geometry Model> instance
zero or more <DRM LOD Related Geometry> instances, each through the use of a <DRM Base LOD Data> link object
zero or more <DRM Octant Related Geometry> instances, each through the use of a <DRM Octant Data> link object
zero or more <DRM Perimeter Related Geometry> instances, each through the use of a <DRM Perimeter Data> link object
zero or more <DRM Quadrant Related Geometry> instances, each through the use of a <DRM Quadrant Data> link object
zero or more <DRM Separating Plane Relations> instances, each through the use of a <DRM Separating Plane Data> link object
zero or more <DRM Spatial Index Related Geometry> instances, each through the use of a <DRM Spatial Index Data> link object
zero or more <DRM State Related Geometry> instances, each through the use of a <DRM State Data> link object
zero or more <DRM Time Related Geometry> instances, each through the use of a <DRM Time Constraints Data> link object
zero or more <DRM Union Of Geometry Hierarchy> instances

Component of (two-way)

None.

Constraints

Clarifications

¹An association between a <DRM Feature Representation> instance and a <DRM Geometry Hierarchy> instance indicates that the environmental object(s) that they represent have the semantic relationship indicated by the <DRM Base Association Data> link object on the association relationship.

²An association between two <DRM Geometry Hierarchy> instances indicates that the environmental object(s) that they represent have the semantic relationship indicated by the <DRM Base Association Data> link object on the association relationship.

³An association between a <DRM Feature Representation> instance and a <DRM Geometry Hierarchy> instance indicates that the environmental object(s) that they represent have the semantic relationship indicated by the <DRM Base Association Data> link object on the association relationship.

⁴An association between two <DRM Geometry Hierarchy> instances indicates that the environmental object(s) that they represent have the semantic relationship indicated by the <DRM Base Association Data> link object on the association relationship.

⁵An association from a <DRM Hierarchy Summary Item> instance to a <DRM Geometry Hierarchy> instance indicates that the <DRM Hierarchy Summary Item> instance summarizes that <DRM Geometry Hierarchy> instance.

⁶An association from a <DRM Reference Surface> instance to a <DRM Geometry Hierarchy> instance indicates that the <DRM Geometry Hierarchy> instance organizes the geometric objects that specify the reference surface geometry of the <DRM Reference Surface> instance.

⁷In the case where multiple <DRM Collision Volume> components are specified for the <DRM Aggregate Geometry> instance, the union of the volumes thus specified is used in collision detection.

⁸A <DRM Aggregate Geometry> instance can have a <DRM LSR Transformation> component only when the <DRM Aggregate Geometry> instance is within the scope of an LSR 3D SRF.

Example(s)

See concrete subclasses for examples.