The SEDRIS Data Representation Model
APPENDIX A - Classes
Geometry Edge

Class Name: Geometry Edge

Superclass - <Geometry Topology>

Subclasses

This DRM class is concrete and has no subclasses.

Definition

An instance of this DRM class is a one-dimensional <Geometry Topology> instance consisting of an ordered collection of <Location> instances connecting one <Geometry Node> to another <Geometry Node>. The orientation of a <Geometry Edge> is defined by the order of its <Location> components, taken in conjunction with its starting <Geometry Node> and ending <Geometry Node>.

A <Geometry Edge> is used to represent the location of a segment of

  1. one or more <Linear Geometry> instances,
  2. a boundary of one or more <Geometry Face> instances, or
  3. both.

Primary Page in DRM Diagram:

Secondary Pages in DRM Diagram:

Example

  1. A <Line> instance that represents the lighting of a runway may consist of many <Geometry Edge> instances.

FAQs

No FAQs supplied.

Constraints

Associated to (one-way)

Associated by (one-way)

Associated with (two-way)

Composed of (two-way)(inherited)

Composed of (two-way)

Component of (two-way)(inherited)

Inherited Field Elements

This class has no inherited field elements.

Notes

Associated with Notes


Geometry_Face

 The <Geometry Faces> (if any) that are bordered by
 this <Geometry Edge>, ordered counterclockwise when
 looking along the <Geometry Edge>.

 The converse of this relationship is that between
 <Geometry Face Ring> and <Geometry Edge>.

Geometry_Node

 This association specifies that the <Geometry Edge>
 is "bounded by" the <Geometry Nodes>.

 The first <Geometry Node> is the starting node of
 the <Geometry Edge>, while the second <Geometry Node>
 is the ending node.
Prev: Geometry. Next: Geometry Face. Up:Index.

Last updated: October 1, 2002 Copyright © 2002 SEDRIS™