Table 6.83—DRM_Elliptic_Cylinder

Property

Description

Superclass

·         <DRM Volume Geometry>

Class

·         <DRM Elliptic Cylinder>

Subclass

·         none

Definition

An object of this DRM class defines a closed cylindrical volume that has an elliptical rather than circular cross-section. The elliptic end faces are determined by the major and minor axes and two component <DRM Reference Vector>s. The component <DRM Location 3D> locates the center of the bottom face. The first component <DRM Reference Vector> (vector_type = MAJOR_AXIS) gives the direction of the major axis. The second component <DRM Reference Vector>. (vector_type = FACE_NORMAL) defines the normal direction to the plane of the bottom <DRM Ellipse> and the direction of the Z-axis, and shall be perpendicular to the major axis <DRM Reference Vector>.

Example(s)

·         The physical extent of certain underwater acoustic phenomena such as cold water eddies, fish schools etc. are best described by <DRM Elliptic Cylinder> <DRM Volume Geometry>.

Inherited field elements

field_name

range

Field_Data_Type

none

 

 

Field elements

field_name

range

Field_Data_Type

major_axis_length1

≥ 0,0

Long_Float

minor_axis_length2

≥ 0,0

Long_Float

height3

≥ 0,0

Long_Float

Associated to (one-way) (inherited)

·         none

Associated to (one-way)

·         none

Associated by (one-way) (inherited)

·         none

Associated by (one-way)

·         none

Associated with (two-way) (inherited)

·         none

Associated with (two-way)

·         zero or one <DRM Geometry Node>5

Composed of (two-way) (inherited)

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

·         zero or one <DRM Classification Data>

·         zero or more {ordered} <DRM Colour>s

·         zero or more {ordered} <DRM Image Mapping Function>s

·         zero or one <DRM Light Rendering Properties>

·         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 Rendering Priority Level>

·         zero or one <DRM Rendering Properties>

·         zero or more <DRM Tack Point>s

·         zero or one DRM_Union_Of_Primitive_Geometry

Composed of (two-way)

·         one <DRM Location>4

·         exactly (2) {ordered} <DRM Reference Vector>s

Composed of (two-way metadata) (inherited)

·         zero or one <DRM Time Constraints Data>

Composed of (two-way metadata)

·         none

Component of (two-way) (inherited)

·         one or more <DRM Union Of Primitive Geometry>s

Component of (two-way)

·         none

Constraints

·         Colour mapping restrictions

·         Continuous LOD restrictions

·         Image mapping functions and texture coordinates

·         No attribute conflicts

·         Non-crossing aggregations

·         Non-crossing associations

·         Non-cyclic aggregations

·         Precedence of Attributre Set Index

Notes

1 In metres.

2 In metres.

3 In metres.

4 Corresponds to centre.

5 Location of centre.

Class diagram

<DRM Elliptic Cylinder>