ISO/IEC 18023-1:200x(E) — Table 6.239 DRM_Separating_Plane_Related

Table 6.239 — DRM_Separating_Plane_Related_Geometry

Property

Description

Class

<DRM Separating Plane Related Geometry>

Superclass

<DRM Aggregate Geometry>

Subclass

None.

Definition

An instance of this DRM class specifies an aggregation of <DRM Geometry Representation> instances, where the components are organized based on their relationships with a set of <DRM Separating Plane> instances. A component is either on the TRUE or FALSE side of any <DRM Separating Plane> instance to which the component is related.

Class diagram

Figure 6.295 — DRM_Separating_Plane_Related_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
None

Default field values

Default field values for DRM_Separating_Plane_Related_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)

one or more <DRM Separating Plane Relations> 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)

Consider a <DRM Geometry Model> instance representing a house, consisting of a <DRM Geometry Model Instance> instance of a <DRM Model> instance representing a chimney and a <DRM Union Of Primitive Geometry> instance containing the <DRM Polygon> components representing the rest of the structure.
The geometry of the <DRM Geometry Model> instance in this case is organized as a <DRM Separating Plane Related Geometry> instance containing one <DRM Separating Plane Relations> component, the <DRM Separating Plane> component of which describes the plane of the portion of the roof on which the chimney is placed. The branch of the <DRM Separating Plane Relations> component through the <DRM Separating Plane Data> link object with positive = TRUE contains the chimney <DRM Geometry Model Instance> instance, while the other branch contains the rest of the geometry of the house model, represented by the <DRM Union Of Primitive Geometry> instance as depicted in Figure 6.296:

Figure 6.296 — <DRM Separating Plane Related Geometry> example