Table 6

Table 6.256—DRM_Separating_Plane_Related_Geometry

Property

Description

Superclass

· <DRM Aggregate Geometry>

Class

· <DRM Separating Plane Related Geometry>

Subclass

· none

Definition

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

Example(s)

· Consider a <DRM Geometry Model> of a house, consisting of a <DRM Geometry Model Instance> of a chimney <DRM Model>, and a <DRM Union Of Primitive Geometry> containing the <DRM Polygon>s making up the rest of the structure.

The <DRM Geometry Model>'s geometry in this case is organized as <DRM Separating Plane Related Geometry> containing one <DRM Separating Plane Relations> object, whose <DRM Separating Plane> describes the plane of the portion of the roof on which the chimney is placed. The true branch of the <DRM Separating Plane Relations> contains the chimney <DRM Geometry Model Instance>, while the other branch contains the rest of the house <DRM Geometry Model>'s geometry.

Separating Plane Related Geometry, Example 1

Inherited field elements

field_name	range	Field_Data_Type
unique_descendants¹		Boolean
strict_organizing_principle²		Boolean

Field elements

field_name	range	Field_Data_Type
none

Associated to (one-way) (inherited)

· none

Associated to (one-way)

· none

Associated by (one-way) (inherited)

· zero or one <DRM Hierarchy Summary Item>

· zero or more <DRM Reference Surface>s

Associated by (one-way)

· none

Associated with (two-way) (inherited)

· zero or more <DRM Feature>s

· zero or more <DRM Geometry Hierarchy>s

Associated with (two-way)

· none

Composed of (two-way) (inherited)

· zero or more {ordered} <DRM Attribute Set Index>s

· zero or more <DRM Base Level Of Detail Data>

· zero or one <DRM Bounding Volume>

· zero or one <DRM Centre Of Buoyancy>

· zero or one <DRM Centre Of Mass>

· zero or one <DRM Centre Of Pressure>

· zero or one <DRM Classification Data>

· zero or more <DRM Collision Volume>

· zero or more {ordered} <DRM Colour>s

· zero or one <DRM Conformal Behaviour>

· zero or more <DRM Geometry Topology Hierarchy>s

· zero or more <DRM Hierarchical Table>s

· zero or more {ordered} <DRM Image Mapping Function>s

· zero or one <DRM Light Rendering Properties>

· zero or more <DRM Light Source>s

· zero or one <DRM LSR Transformation>

· zero or one <DRM Overload Priority Index>

· zero or one <DRM Perimeter Data>

· zero or one <DRM Point Of Contact>

· zero or one <DRM Presentation Domain>

· zero or more <DRM Property Description>

· zero or more <DRM Property Table>s

· zero or more <DRM Property Table Reference>s

· zero or more <DRM Property Value>s

· zero or one <DRM Reference Surface>

· zero or one <DRM Rendering Priority Level>

· zero or one <DRM Rendering Properties>

· zero or more <DRM Sound Instance>s

· zero or one <DRM Spatial Domain>

· zero or one <DRM Stamp Behaviour>

· zero or one <DRM Time Constraints Data>

Composed of (two-way)

· one or more <DRM Separating Plane Relations>s

Composed of (two-way metadata) (inherited)

· zero or one <DRM Access>

· zero or more <DRM Browse Media>s

· zero or one <DRM Citation>

· zero or more <DRM Cross Reference>s

· zero or one <DRM Data Quality>

· zero or one <DRM Description>

· zero or one <DRM Keywords>

· zero or one <DRM Point Of Contact>

Composed of (two-way metadata)

· none

Component of (two-way) (inherited)

· zero or more <DRM Alternate Hierarchy Related Geometry>s through <DRM Hierarchy Data>s

· zero or more <DRM Animation Related Geometry>s

· zero or more <DRM Classification Related Geometry>s through <DRM Classification Data>s

· zero or one <DRM Environment Root>

· zero or one <DRM Geometry Model>

· zero or more <DRM Level Of Detail Related Geometry>s through <DRM Base Level Of Detail Data>s

· zero or more <DRM Oct Tree Related Geometry>s through <DRM Oct Tree Data>s

· zero or more <DRM Perimeter Related Geometry>s through <DRM Perimeter Data>s

· zero or more <DRM Quad Tree Related Geometry>s through <DRM Quad Tree Data>s

· zero or more <DRM Separating Plane Relations>s through <DRM Separating Plane Data>s

· zero or more <DRM Spatial Index Related Geometry>s through <DRM Spatial Index Data>s

· zero or more <DRM State Related Geometry>s through <DRM State Data>s

· zero or more <DRM Time Related Geometry>s through <DRM Time Constraints Data>s

· zero or more <DRM Union Of Geometry Hierarchy>s

Component of (two-way)

· none

Constraints

· Colour mapping restrictions

· Image mapping functions and texture coordinates

· No attribute conflicts

· Non-crossing aggregations

· Non-crossing associations

· Non-cyclic aggregations

· Precedence of Attribute_Set_Index

· Separating plane organizing principle

Notes

¹ If TRUE, for any object that exists 'below' this aggregation, each object will appear in only one 'branch' of this aggregation. If FALSE, objects may appear in multiple 'branches' of this aggregation.

² If TRUE, each 'branch' strictly follows the rules of this aggregation. If FALSE, each 'branch' might bend the rules a bit. For example, if this is a spatial aggregation, a value of TRUE indicates that objects will not cross the spatial extents defined by this aggregation relationship, and a value of FALSE indicates that objects might cross those bounds. For another example, if this is a time-based aggregation, a value of TRUE indicates that all branches will only contain data valid for the times specified for each branch, and a value of FALSE indicates that the branches have the option of including data that falls outside of the specified time ranges for that branch.

Class diagram