The SEDRIS Data Representation Model
APPENDIX A - Classes
Emissive Colour

Class Name: Emissive Colour

Superclass - <SEDRIS Abstract Base>

Subclasses

This DRM class is concrete and has no subclasses.

Definition

An instance of this DRM class specifies the intensity component of a <Primitive Colour> instance, used to represent light emitted by the coloured environmental object.

Since the <Emissive Colour> component is due to light emitted by the environmental object, its contribution to the final colour of the environmental object is independent of any light sources in the environment. Therefore, its contribution is independent of the angle of the lit environmental object to the light source and independent of the angle of the lit environmental object to the observer.

Primary Page in DRM Diagram:

Secondary Pages in DRM Diagram:

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

Example

See the <Primitive Colour> class for examples.

FAQs

Does the DRM use the OpenGL lighting model?

No, although the terminology is similar. The DRM handles transparency somewhat differently than OpenGL does, among other things. For a description of the OpenGL lighting model, see [OPENGL], Chapter 5 "Lighting".

Constraints

Composed of (two-way)

Component of (two-way)

Inherited Field Elements

This class has no inherited field elements.
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Last updated: July 26, 2006 Copyright © 2006 SEDRIS