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 Figure 6.18, where the srf_context_info of S is specified to be LSR 3D.

    Geometric Centre, Example 1

    Figure 18 — <DRM Geometric Centre> centre of buoyancy example

    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_GEOMCTRCOD_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 Figure 6.19, where the srf_context_info of G is specified to be LSR 3D.

    Geometric Centre, Example 2

    Figure 19 — <DRM Geometric Centre> centre of mass example

    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_GEOMCTRCOD_CENTRE_OF_MASS to determine how they apply to G as a whole.

  3. Consider a <Model> instance P providing a geometric representation of an environmental object classified as an ECC_AIRCRAFT as depicted in Figure 6.20, where the srf_context_info of P is specified to be LSR 3D.

    Geometric Centre, Example 3

    Figure 20 — <DRM Geometric Centre> centre of pressure example

    If P is instanced in a simulation where P is considered to be in the air, the effects of the force of the air upon P can be computed for the <Geometric Centre> instance with meaning = SE_GEOMCTRCOD_CENTRE_OF_PRESSURE to determine how they apply to P 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; 1

Notes

Fields Notes

meaning

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


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Last updated: July 26, 2006 Copyright © 2006 SEDRIS