The SEDRIS Data Representation Model
APPENDIX A - Classes
Separating Plane Related Geometry
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Class Name: Separating Plane Related Geometry
Subclasses
This DRM class is concrete and has no subclasses.
Definition
An instance of this DRM class specifies an aggregation of
<Geometry Representation>
instances, where the components
are organized based on their relationships with a set of
<Separating Plane> instances.
A component is either on the SE_TRUE
or SE_FALSE side of any
<Separating Plane> instance to
which the component is related.
Primary Page in DRM Diagram:
Secondary Pages in DRM Diagram:
This class appears on only one page of the DRM class diagram.
Example
Consider a <Geometry Model> instance
representing a house, consisting of a
<Geometry Model Instance>
of a <Model> instance representing a chimney, and a
<Union Of Primitive Geometry>
instance containing the <Polygon> instances
representing the rest of the structure.
The <Geometry Model> instance's geometry
in this case is organized as a
<Separating Plane Related Geometry> instance containing one
<Separating Plane Relations>
instance, the <Separating Plane> component
of which describes the plane of the portion of the
roof on which the chimney is placed. The
SE_TRUE branch of the
<Separating Plane Relations>
contains the chimney
<Geometry Model Instance>, while
the other branch contains the rest of the house
<Model> instance's geometry.
FAQs
No FAQs supplied.
Constraints
Associated to (one-way) (inherited)
Associated by (one-way) (inherited)
Composed of (two-way) (inherited)
Composed of (two-way)
Composed of (two-way metadata) (inherited)
Component of (two-way) (inherited)
- zero or more <Alternate Hierarchy Related Geometry> instances, each with a <Hierarchy Data> link object
- zero or more <Animation Related Geometry> instances
- zero or more <Classification Related Geometry> instances, each with a <Classification Data> link object
- zero or one <Environment Root> instance
- zero or one <Geometry Model> instance
- zero or more <LOD Related Geometry> instances, each with a <Base LOD Data> link object
- zero or more <Octant Related Geometry> instances, each with a <Octant Data> link object
- zero or more <Perimeter Related Geometry> instances, each with a <Perimeter Data> link object
- zero or more <Quadrant Related Geometry> instances, each with a <Quadrant Data> link object
- zero or more <Separating Plane Relations> instances, each with a <Separating Plane Data> link object
- zero or more <Spatial Index Related Geometry> instances, each with a <Spatial Index Data> link object
- zero or more <State Related Geometry> instances, each with a <State Data> link object
- zero or more <Time Related Geometry> instances, each with a <Time Constraints Data> link object
- zero or more <Union Of Geometry Hierarchy> instances
Notes
Associated to Notes
An association between a <Feature Representation> instance
and a <Geometry Hierarchy> instance indicates that the
environmental object(s) that they represent have the
semantic relationship indicated by the <Base Association Data>
instance on the association relationship.
An association between two <Geometry Hierarchy> instances
indicates that the environmental object(s) that they
represent have the semantic relationship indicated by
the <Base Association Data> instance on the association
relationship.
Associated from Notes
An association between a <Feature Representation> instance
and a <Geometry Hierarchy> instance indicates that the
environmental object(s) that they represent have the
semantic relationship indicated by the <Base Association Data>
instance on the association relationship.
An association between two <Geometry Hierarchy> instances
indicates that the environmental object(s) that they
represent have the semantic relationship indicated by
the <Base Association Data> instance on the association
relationship.
An association from a <Hierarchy Summary Item> instance to a
<Geometry Hierarchy> indicates that the <Hierarchy Summary Item>
summarizes that <Geometry Hierarchy>.
An association from a <Reference Surface> instance to a
<Geometry Hierarchy> indicates that the <Geometry Hierarchy>
organizes the geometric objects that specify the resolution
surface of the <Reference Surface>.
Composed of Notes
In the case where multiple <Collision Volume> components are
specified for a given <Aggregate Geometry>, the union of the
volumes thus specified is used in collision detection.
Fields Notes
If the value of the unique_descendants field is SE_TRUE, each
descendant of this aggregation,
that is, each <Geometry Representation> instance that exists
in the component tree
rooted at the given <Aggregate Geometry>, shall be unique, in the
sense that it shall appear in only one branch of this aggregation.
If unique_descendants is SE_FALSE, at least one
<Geometry Representation> instance
appears in more than one branch of the aggregation.
If the value of the strict_organizing_principle field is SE_TRUE,
each branch of this aggregation
strictly complies with the organizing principle for its
particular subclass. If this value is SE_FALSE, at least
one branch does not strictly comply with the given
organizing principle. See the organizing principle constraint
for each specific subclass for details.
Prev: Separating Plane Data.
Next: Separating Plane Relations.
Up:Index.
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Last updated: July 16, 2004
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Copyright © 2004 SEDRIS™
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