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 shading algorithms, display sides, and presentation styles suggested to use when rendering <Geometry Representation> instances, particularly <Polygon> instances.

Primary Page in DRM Diagram:

Secondary Pages in DRM Diagram:

Example

  1. Render flat shaded, solid, front-sides of polygons.

  2. Render interpolation shaded, solid, front-sides of polygons.

  3. Render Gouraud shaded, wire-frame, both-sides of polygons.

  4. Render Phong shaded, solid, back-sides of polygons (possibly for a transmittal that describes an enclosed volume, and all of the polygons defining the enclosed volume face outwards, and the simulation would occur inside the enclosed volume, so only the back sides of the polygons shall 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; (notes)
SE_Shading_Method shading_method; (notes)
SE_Colour_Binding colour_binding; (notes)
SE_Display_Style style; (notes)
SE_Display_Side side; (notes)

Notes

Composed of Notes


Presentation_Domain

 If present, this component identifies the type of sensor for which
 the given <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 tokens
 specifying what combination of wire vs. solid style is to be used.

side

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

 The front side of a <Polygon> is the side that has a counterclockwise
 orientation of the ordered <Vertex> components of the <Polygon>.
 Normally either both sides or just the front sides of <Polygon>
 instances are rendered; rendering just the front side of a <Polygon>
 culls out the back face of the <Polygon>.
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Last updated: July 16, 2004 Copyright © 2004 SEDRIS™