The SEDRIS Data Representation Model
APPENDIX A - Classes
Strobing Light Behaviour

Class Name: Strobing Light Behaviour

Superclass - <Light Rendering Behaviour>

Subclasses

This DRM class is concrete and has no subclasses.

Definition

Indicates that the attributed object appears to be a strobing light.

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 of an airport, in which the data provider wishes to place a strobing light string along a runway. The light emitted is negligible at an ordinary viewing range, in terms of cast shadows and so on, so it is most efficient to represent it as follows.

    Strobing Light Behaviour, Example 1

    Since the <Line>'s count is greater than zero, it does not appear to be solid; each of its < Vertices> is shown independently. The light_diameter in pixels is not applicable, and the light is visible at any distance since no extingishing range is specified. The runway lights will always be on, unless a < Light Rendering Properties Control Link> is added. The lights strobe every 2 seconds.

FAQs

No FAQs supplied.

Constraints

None.

Component of (two-way)(inherited)

Inherited Field Elements

This class has no inherited field elements.

Field Elements

SE_Long_Float period; (notes)
SE_Long_Float delay; (notes)

Notes

Fields Notes


period

 (in seconds) represents the total period of time (both on and off)

delay

 (in seconds) is better characterized as a pre-start.
 It allows a series of lights to appear asynchronous.
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Last updated: October 1, 2002 Copyright © 2002 SEDRIS™