Class Name: Bounding Volume

Superclass - <Volume>

Subclasses

Definition

An instance of this DRM class specifies a volume that encompasses the <Aggregate Geometry> of which it is a component.

Primary Page in DRM Diagram:

• 9

Secondary Pages in DRM Diagram:

• 4

Example

1. The rectangular <Bounding Volume> of a house that is used to show the maximum extents of the house in three dimensions. This may be used to calculate first level ray-volume intersections.

FAQs

Can an <Aggregate Geometry>'s <Bounding Volume> and <Collision Volume> be the same?

Yes.

Is the <Bounding Volume> the convex hull of the <Aggregate Geometry>?

Not necessarily. The convex hull could be considerably more complex than the <Volume Extent> (see).

Does the <Bounding Volume> exactly contain the <Aggregate Geometry>?

In special cases, the <Bounding Volume> may fail to contain all of the geometry due to 'warping' introduced by coordinate conversion or transformation.

Constraints

Composed of (two-way)(inherited)

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

Component of (two-way)

• one <Aggregate Geometry> instance

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.