Volume Object

The SEDRIS Data Representation Model APPENDIX A - Classes Volume Object

Class Name: Volume Object

Superclass - <Volume Geometry>

Subclasses

This DRM class is concrete and has no subclasses.

Definition

An instance of this DRM class specifies a <Volume Geometry> instance using a <Location 3D> component to position the geometry and a <Volume Extent> component to define the shape.

Primary Page in DRM Diagram:

Secondary Pages in DRM Diagram:

Example

A <Volume Object> instance represents a column of a building by specifying a cylindrical shape.

FAQs

No FAQs supplied.

Constraints

Associated with (two-way)

zero or one <Geometry Node> instance (notes)

Composed of (two-way) (inherited)

zero or one <Classification Data> instance
zero or more {ordered} <Property Set Index> instances
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)

Inherited Field Elements

This class has no inherited field elements.

Notes

Associated with Notes

Geometry_Node

This <Geometry Node> instance corresponds to the <Location 3D> component of the <Volume Object> instance.

Composed of Notes

Union_Of_Primitive_Geometry

A <Primitive Geometry> instance P has a <Union Of Primitive Geometry> component only when P can be decomposed into nested <Primitive Geometry> instances.

EXAMPLE A <Polygon> instance can be decomposed into multiple <Polygon> instances representing subfaces.

For a cylindrical <Volume Object> instance, the <Location 3D> component specifies the centre of the bottom face where the direction of up (and thus the bottom) is determined by the SRF in which the <Volume Object> instance is specified. For the other subclasses, it specifies the centre of the volume.

Prev: Volume LOD Data. Next: Volumetric Feature. Up:Index.

Last updated: August 23, 2005