Table 6.121—DRM_Geometry_Model_Instance

Property

Description

Superclass

·         <DRM Geometry Hierarchy>

Class

·         <DRM Geometry Model Instance>

Subclass

·         none

Definition

An object of this DRM class specifies a single case of the existence of a <DRM Model> within the transmittal, including variations or specialization unique to that case.

Example(s)

·         Consider a <DRM Model> of a building, consisting of a <DRM Geometry Model> describing its geometric representation, where the <DRM Model> is described in an LSR 3D spatial reference frame.

To instance this <DRM Model> into an <DRM Environment Root> whose spatial reference frame is 3D geodetic, the data provider constructs a <DRM Geometry Model Instance> with a <DRM World Transformation> component, and incorporates it into the <DRM Geometry Hierarchy> of that <DRM Environment Root>. The <DRM World Transformation> specifies the DRM_GD Location 3D at which the <DRM Model>'s 0, 0, 0 coordinate will be instanced, together with any other transformation information required to orient and scale the <DRM Model> properly.

·         Consider a <DRM Geometry Model> describing the rotor of a helicopter, and intended for use within a larger <DRM Geometry Model> of the entire helicopter. Both are defined in 3D LSR spatial reference frames.

The helicopter model will contain a <DRM Geometry Model Instance> of the rotor model, with an <DRM LSR Transformation> component containing a <DRM Rotation> object with a <DRM Rotation Control Link>. The <DRM LSR Transformation> specifies both the transformation required to position the rotor within the helicopter model, and the <DRM Variable> within the larger helicopter <DRM Model> that will be plugged into the rotor <DRM Model>'s internal <DRM Variable> for angle of rotation.

Inherited field elements

field_name

range

Field_Data_Type

none

 

 

Field elements

field_name

range

Field_Data_Type

none

 

 

Associated to (one-way) (inherited)

·         none

Associated to (one-way)

·         one <DRM Geometry Model>

Associated by (one-way) (inherited)

·         zero or one <DRM Hierarchy Summary Item>

·         zero or more <DRM Reference Surface>s

Associated by (one-way)

·         none

Associated with (two-way) (inherited)

·         zero or more <DRM Feature>s

·         zero or more <DRM Geometry Hierarchy>s

Associated with (two-way)

·         none

Composed of (two-way) (inherited)

·         zero or more {ordered} <DRM Attribute Set Index>

·         zero or one <DRM Classification Data> 

·         zero or one <DRM Point Of Contact>

·         zero or more <DRM Property Table>s

·         zero or more <DRM Property Table Reference>s

·         zero or more <DRM Property Value>s

·         zero or one <DRM Reference Surface>

·         zero or more <DRM Sound Instance>s

·         zero or one <DRM Time Constraints Data>

Composed of (two-way)

·         zero or one <DRM Conformal Behaviour

·         zero or more <DRM Expression>s through <DRM Model Instance Template Index>

·         zero or onen <DRM Overload Priority Index>

·         zero or one <DRM Rendering Priority Level>

·         zero or one <DRM Stamp Behaviour

·         zero or one <DRM Transformation>

Composed of (two-way metadata) (inherited)

·         zero or one <DRM Access>

·         zero or more <DRM Browse Media>s

·         zero or one <DRM Citation>

·         zero or more <DRM Cross Reference>s

·         zero or one <DRM Data Quality>

·         zero or one <DRM Description>

·         zero or one <DRM Keywords>

·         zero or one <DRM Point Of Contact>

Composed of (two-way metadata)

·         none

Component of (two-way) (inherited)

·         zero or more <DRM Alternate Hierarchy Related Geometry>s through <DRM Hierarchy Data>s

·         zero or more <DRM Animation Related Geometry>s

·         zero or more <DRM Classification Related Geometry>s through <DRM Classification Data>s

·         zero or one <DRM Environment Root>

·         zero or one <DRM Geometry Model>

·         zero or more <DRM Level Of Detail Related Geometry>s through <DRM Base Level Of Detail Data>s

·         zero or more <DRM Oct Tree Related Geometry>s through <DRM Oct Tree Data>s

·         zero or more <DRM Perimeter Related Geometry>s through <DRM Perimeter Data>s

·         zero or more <DRM Quad Tree Related Geometry>s through <DRM Quad Tree Data>s

·         zero or more <DRM Separating Plane Relations>s through <DRM Separating Plane Data>s

·         zero or more <DRM Spatial Index Related Geometry>s through <DRM Spatial Index Data>s

·         zero or more <DRM State Related Geometry>s through <DRM State Data>s

·         zero or more <DRM Time Related Geometry>s through <DRM Time Constraints Data>s

·         zero or more <DRM Union Of Geometry Hierarchy>s

Component of (two-way)

·         none

Constraints

·         Distinct link objects

·         Model spatial reference frame

·         No attribute conflicts

·         Non-crossing aggregations

·         Non-crossing associations

·         Non-cyclic aggregations

·         Precedence of Attribute_Set_Index

Notes

none

Class diagram

<DRM Geometry Model Instance>