The SEDRIS Data Representation Model
APPENDIX A - Classes
Rotation Control Link

Class Name: Rotation Control Link

Superclass - <Control Link>

Subclasses

This DRM class is concrete and has no subclasses.

Definition

An instance of this DRM class is a specialized <Control Link> instance used to provide the connection between an ordered aggregation of <Expression> instances and the target fields of one or more <Rotation> instances.

Primary Page in DRM Diagram:

Secondary Pages in DRM Diagram:

Example

  1. A <Model> of a weather vane has a <Geometry Model> with a <Union Of Geometry Hierarchy> component, to which is attached an <LSR Transformation> with a <Rotation> instance, indicating that the weather vane can turn to match the direction that the wind is blowing. The <Rotation> instance has a <Rotation Control Link>, which changes the angle of rotation to match the wind direction.

  2. See <Property Table Reference Control Link>, example 1.

FAQs

No FAQs supplied.

Constraints

Composed of (two-way) (inherited)

Component of (two-way)

Inherited Field Elements

SE_String description; (notes)

Field Elements

SE_Integer_Positive expr_index; (notes)
SE_Integer_Unsigned lower_expr_index; (notes)
SE_Integer_Unsigned upper_expr_index; (notes)

Notes

Fields Notes


description

 The description field specifies a text description of the given
 <Control Link> instance's purpose.

expr_index

 The expr_index field specifies which <Expression> component specifies
 the angle field value of the affected <Rotation> instances, by
 specifying a 1-based index into the ordered aggregation of
 <Expression> instances.

lower_expr_index

 The lower_expr_index field specifies which <Expression> component,
 if any, defines the lower limit of the angle field value of the
 affected <Rotation> instances. A value of zero (0) indicates that
 no lower limit is specified; otherwise, the value specifies a
 1-based index into the ordered aggregation of <Expression>
 instances.

upper_expr_index

 The lower_expr_index field specifies which <Expression> component,
 if any, defines the upper limit of the angle field value of the
 affected <Rotation> instances. A value of zero (0) indicates that
 no upper limit is specified; otherwise, the value specifies a
 1-based index into the ordered aggregation of <Expression>
 instances.
Prev: Rotation. Next: Scale. Up:Index.

Last updated: July 16, 2004 Copyright © 2004 SEDRIS™