Abstract Class Name: Surface Geometry

Superclass - Primitive Geometry

Subclasses

• Ellipse
• Patch
• Polygon

Definition

A conceptual grouping of geometric surface representations.

Primary Page in DRM Diagram:

• 5

Example

The terrain skin within a given area can be specified as a collection of Polygons or as one or more Patches. Polygons and Patches are both types of Surface Geometry.

Constraints

• No Attribute Conflicts
• Non Crossing Aggregations
• Non Cyclic Aggregations
• Precedence of Attribute Set Index
• Color Mapping Restrictions
• Image Mapping Functions and Texture Coordinates
• Nested Primitive Geometry
• Non Nestable Continuous LOD

Composed of (one-way)(inherited)

• optionally, some {ordered} Attribute Set Indices
• optionally, a Classification Data
• optionally, some Property Tables
• optionally, some Property Table References
• optionally, some Property Values
• optionally, some Tack Points
• optionally, some {ordered} Colors
• optionally, a Light Rendering Properties
• optionally, a Rendering Properties
• optionally, some {ordered} Image Mapping Functions
• optionally, a Rendering Priority Level

Composed of (two-way)(inherited)

• optionally, a Union of Primitive Geometry

Composed of (one-way metadata)(inherited)

• optionally, a Time Constraints Data

Component of (two-way)(inherited)

• one or more Union of Primitive Geometries