Table 6.120—DRM_Geometry_Model

Property

Description

Superclass

· <DRM SEDRIS Abstract Base>

Class

· <DRM Geometry Model>

Subclass

· none

Definition

This DRM class specifies a collection of geometric attributes and the necessary hierarchy and attributes to build a renderable component of the transmittal. Each <DRM Geometry Model> is defined as having a single spatial reference frame. <DRM Geometry Model Instance>s are used to transform one <DRM Model> into the spatial reference frame of another <DRM Model> or the spatial reference frame of the <DRM Environment Root>. A <DRM Geometry Model>. may be a large and complex as a large terrain model, or as simple as a tank's turret at the lowest level of detail.

Example(s)

· The representation of the hull of an automobile.

· A <DRM Geometry Model> representing a spacecraft pointing down the Z-axis. The <DRM Geometry Model> is aggregated by a <DRM Model>, which in turn is part of a large <DRM Model Library>, in which the spacecrafts are expected to point down the positive Y axis. To be consistent with the other <DRM Model>s in the <DRM Model Library>, the spacecraft's <DRM Geometry Model> has a <DRM LSR Transformation> to reorient it to point down the positive Y axis.

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)

· none

Associated by (one-way) (inherited)

· none

Associated by (one-way)

· zero or more <DRM Geometry Model Instance>s

Associated with (two-way) (inherited)

· none

Associated with (two-way)

· none

Composed of (two-way) (inherited)

· none

Composed of (two-way)

· zero or more <DRM Attachment Point>s

· zero or more <DRM Contact Point>s¹

· zero or one <DRM Geometry Hierarchy>²

· zero or one <DRM LSR Transformation>³

· zero or one <DRM Point Of Contact>

Composed of (two-way metadata) (inherited)

· none

Composed of (two-way metadata)

· 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>

Component of (two-way) (inherited)

· none

Component of (two-way)

· one <DRM Model>

Constraints

· Continuous LOD restrictions

Notes

¹ Allows explicit definition of where the model contacts the terrain surface.

² This is actually required, except when the Non-empty Model constraint is applicable.

³ Allows for a standard model orientation.

Class diagram

<DRM Geometry Model>