Class

• <DRM World Transformation>

Superclass

• <DRM Transformation>

Subclass

• None.

Definition

An instance of this DRM class is a <DRM Transformation> instance, specified by a <DRM Location> component and a <DRM World 3x3> component, used to transform a DRM object defined in an LSR SRF into another SRF.

A <DRM World Transformation> instance is either

1. defined in a non-LSR SRF, then used to instantiate an LSR <DRM Model> instance into the non-LSR SRF, or
2. defined within an LSR SRF (SRF₁), then used to instantiate a <DRM Model> instance specified in another LSR SRF (SRF₂) into SRF₁, in a way that maintains the conformality of any <DRM Location> instances in the <DRM Model> instance.

A <DRM World Transformation> instance is applied as specified in 4.7.6 Representing models within an environment.

Class diagram

Figure 6.381 — DRM_World_Transformation

Constraints

• Publishable object

Example(s)

• Let H be a <DRM Model> instance classified as ECC_HOUSE such that H is specified within a 3D LSR SRF and H has a <DRM Geometry Model> component G. Let X be a <DRM Geometry Model Instance> instance specified within a CD 3D SRF such that X represents H.

  X is associated to G, and X has a <DRM World Transformation> component with a <DRM CD 3D Location> instance to position the house and a <DRM World 3x3> instance to rotate and scale the house in order to place it on the terrain.

• Let B be a <DRM Model> instance classified as an ECC_BUILDING such that B has a <DRM Geometry Model> component G. To reference B within a geometric terrain representation, a <DRM Geometry Model Instance> instance X is created such that X associates to G, and X has a <DRM World Transformation> component with a <DRM Location> component and a <DRM World 3x3> component to locate and orient the building onto the terrain representation, respectively.