Abstract Class Name: Volume

Superclass - <SEDRIS Abstract Base>

Subclasses

• <Bounding Volume>
• <Collision Volume>
• <Sound Volume>

Definition

An instance of this DRM class is a geometric primitive shape that identifies an enclosed 3D solid. Possible shapes include spheres (and implied points, where a point is a degenerate sphere), parallelepiped, cylinders (and implied lines, where a line is a degenerate cylinder). The shape is given by the <Volume Extent> component, the location of the shape centre is given by the <Location 3D> component.

Primary Page in DRM Diagram:

• 9

Secondary Pages in DRM Diagram:

Example

1. A terrain region has a <Bounding Volume> defined by a sphere with centre specified by the <Location 3D> component and radius given by the <Spherical Volume Extent> component radius field.
2. A parallelepiped <Volume>, describing the <Collision Volume> of a house, is represented by a component <Location 3D> for the centre of the house and a component <Parallelepiped Volume Extent>.

Constraints

Composed of (two-way)

• one <Location 3D> instance (notes)
• one <Volume Extent> instance (notes)
• zero or one <World Transformation> instance (notes)

Inherited Field Elements

Notes

Composed of Notes

Location_3D

 This specifies the volume centre.

Volume_Extent

 This specifies the volume shape.

World_Transformation

 If specified, this locates and orients the volume within the
 currently scoped 'world' spatial reference frame.