The SEDRIS Data Representation Model
APPENDIX A - Classes
Geometric Centre

Class Name: Geometric Centre

Superclass - <SEDRIS Abstract Base>

Subclasses

This DRM class is concrete and has no subclasses.

Definition

An instance of this DRM class specifies the semantics of a location related to an <Aggregate Geometry> instance.

Primary Page in DRM Diagram:

Secondary Pages in DRM Diagram:

This class appears on only one page of the DRM class diagram.

Example

  1. Consider a <Model> instance S providing a geometric representation of an environmental object classified as an ECC_SAILING_VESSEL as depicted in , where the srf_info of S is specified to be LSR 3D.

    Geometric Centre, Example 1

    If S is instanced in a simulation where S is considered to be floating on water, the effects of the force of the water upon S can be computed for the <Geometric Centre> instance with meaning = SE_GEOM_CTR_CODE_CENTRE_OF_BUOYANCY to determine how they apply to S as a whole.

  2. Consider a <Model> instance G providing a geometric representation of an environmental object classified as an ECC_GROUND_VEHICLE as depicted in , where the srf_info of G is specified to be LSR 3D.

    Geometric Centre, Example 2

    If G is instanced in a simulation where G is considered to be in a gravitational field, the effects of gravity upon G can be computed for the <Geometric Centre> instance with meaning = SE_GEOM_CTR_CODE_CENTRE_OF_MASS to determine how they apply to G as a whole.

  3. Consider a <Model> instance A providing a geometric representation of an environmental object classified as an ECC_AIRCRAFT as depicted in , where the srf_info of A is specified to be LSR 3D.

    Geometric Centre, Example 3

    If A is instanced in a simulation where A is considered to be in the air, the effects of the force of the air upon A can be computed for the <Geometric Centre> instance with meaning = SE_GEOM_CTR_CODE_CENTRE_OF_PRESSURE to determine how they apply to A as a whole.

FAQs

No FAQs supplied.

Constraints

Composed of (two-way)

Component of (two-way)

Inherited Field Elements

This class has no inherited field elements.

Field Elements

SE_Geometric_Centre_Code meaning; (notes)

Notes

Fields Notes

meaning

The meaning field specifies the semantics of the <Location 3D> component of the <Geometric Centre> instance.


Prev: Functional Association Data. Next: Geometry Edge. Up:Index.

Last updated: August 23, 2005 Copyright © 2005 SEDRIS