Class Name: Polygon

Superclass - <Surface Geometry>

Subclasses

Definition

An instance of this DRM class specifies a bounded portion of a plane, defined by a set of three or more <Base Vertex> objects listed in counter-clockwise order. The final segment connecting the last <Vertex> to the first <Vertex> is implicit, not explicit; that is, the first <Vertex> is not duplicated to also appear as the last <Vertex> of the <Polygon>.

Primary Page in DRM Diagram:

• 5

Secondary Pages in DRM Diagram:

• 13

Example

1. One of the surfaces representing the geometry of a vehicle.

FAQs

No FAQs supplied.

Constraints

• <<No Attribute Conflicts>>
• <<Non Crossing Aggregations>>
• <<Non Cyclic Aggregations>>
• <<Precedence of Attribute Set Index>>
• <<Colour Mapping Restrictions>>
• <<Continuous LOD Restrictions>>
• <<Image Mapping Functions and Texture Coordinates>>
• <<Nested Primitive Geometry>>
• <<Polygon As Bounded Plane>>

Associated with (two-way)

• a bounded set of 0..2 {ordered} <Geometry Face> instances (notes)

Composed of (two-way)(inherited)

• zero or more {ordered} <Attribute Set Index> instances
• zero or one <Classification Data> instance
• zero or more <Property Table> instances
• zero or more <Property Table Reference> instances
• zero or more <Property Value> instances
• zero or more <Colour> instances
• zero or more {ordered} <Image Mapping Function> instances
• zero or one <Light Rendering Properties> instance
• zero or one <Presentation Domain> instance
• zero or one <Rendering Priority Level> instance
• zero or one <Rendering Properties> instance
• zero or more <Tack Point> instances
• zero or one <Union Of Primitive Geometry> instance (notes)

Composed of (two-way)

• 3 or more {ordered} <Base Vertex> instances
• zero or one <Polygon Control Link> instance
• zero or more <Reference Vector> instances

Composed of (two-way metadata)(inherited)

• zero or one <Time Constraints Data> instance

Component of (two-way)(inherited)

• one or more <Union Of Primitive Geometry> instances

Inherited Field Elements

Field Elements

Notes

Associated with Notes

Geometry_Face

 A <Geometry Face> associated with a <Polygon> instance
 represents the topology of the specified face (front
 or back) of that <Polygon>.

Composed of Notes

Union_Of_Primitive_Geometry

 A <Primitive Geometry> contains a <Union Of Primitive Geometry>
 instance as a component only when that <Primitive Geometry>
 can be decomposed into nested <Primitive Geometry>, as (for
 example) a <Polygon> can be decomposed into subfaces.

Fields Notes

polygon_flags

 This specifies the set of SE_Polygon_Flag tokens applicable to
 the given <Polygon> instance.