Class Name: Collision Volume

Superclass - <Volume>

Subclasses

Definition

An instance of this DRM class is a <Volume> that encompasses part (possibly all) of the <Aggregate Geometry> of which it is a component, and is used in collision detection.

Primary Page in DRM Diagram:

• 9

Secondary Pages in DRM Diagram:

• 4

Example

1. The cylinder that describes the gun tube of a weapon system.

2. Consider a geometric representation of a car, for which it will be necessary to compute intersections of the front of the car with other objects. In this example, the data provider constructs a perpendicular volume projecting from the front bumper of the car representation, and uses the resulting <Parallelepiped Volume Extent> to specify a <Collision Volume> for the car representation.

FAQs

May an <Aggregate Geometry> specify the same volume of space for both its <Bounding Volume> and its <Collision Volume>?

Yes.

If an <Aggregate Geometry> instance has multiple <Collision Volume> components, how are they to be interpreted?

The complete volume specified by the union of all the individual <Collision Volume> components is that which is used for collision detection. This capability is provided to allow <Collision Volume> information to be provided for complex shapes.

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.