Emissive Colour

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>, used to represent light emitted by the coloured object. Since the <Emissive Colour> component is due to light emitted by the object, it is independent of any light sources in the environment, so it is

independent of the angle of the lit object to the light source
independent of the angle of the lit 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 <Primitive Colour>.

FAQs

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

Constraints

None.

Composed of (two-way)

one <Colour Data> instance

Component of (two-way)

one <Primitive Colour> instance

Inherited Field Elements

This class has no inherited field elements.

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Last updated: October 1, 2002