The SEDRIS Data Representation Model
APPENDIX A - Classes
Rendering Properties

Class Name: Rendering Properties

Superclass - <SEDRIS Abstract Base>

Subclasses

This DRM class is concrete and has no subclasses.

Definition

An instance of this DRM class specifies a selection of suggested shading algorithms, display sides, and presentation styles to use when rendering <Geometry Representation> instances.

Primary Page in DRM Diagram:

Secondary Pages in DRM Diagram:

Example

  1. A <Rendering Properties> instance specifies that flat shaded, solid, front-sides of polygons are to be rendered.

  2. A <Rendering Properties> instance specifies that interpolation shaded, solid, front-sides of polygons are to be rendered.

  3. A <Rendering Properties> instance specifies that Gouraud shaded, wire-frame, both-sides of polygons are to be rendered.

  4. A <Rendering Properties> instance specifies that Phong shaded, solid, back-sides of polygons are to be rendered. This case might be appropriate for a transmittal that describes an enclosed volume in which all of the polygons defining the enclosed volume face outwards, and the simulation occurs inside the enclosed volume. Thus, only the back sides of the polygons are to be rendered.

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_Pixel_Fill_Method fill_method; 2
SE_Shading_Method shading_method; 3
SE_Colour_Binding colour_binding; 4
SE_Display_Style style; 5
SE_Display_Side side; 6

Notes

Composed of Notes


Presentation_Domain

If present, this component identifies the type of sensor for which the <Rendering Properties> instance is applicable.

Fields Notes

fill_method

The fill_method field specifies the colour blending method to be used.

shading_method

The shading_method field specifies the shading algorithm to be used.

colour_binding

The colour_binding field specifies the colour inheritance / overload rule in effect.

style

The style field specifies the set of SE_Display_Style members specifying what combination of wire and solid styles is to be used.

side

The side field specifies the set of SE_Display_Side members specifying which side(s) to display.

The front side of a <Polygon> instance is the side that has a counterclockwise orientation of the ordered <Vertex> components of the <Polygon> instance. Normally, either both sides or just the front sides of <Polygon> instances are rendered. Rendering just the front side of a <Polygon> instance culls the back face of the <Polygon> instance.


Prev: Rendering Priority Level. Next: Responsible Party. Up:Index.

Last updated: July 26, 2006 Copyright © 2006 SEDRIS