Class Name: Translation Control Link

Superclass - <Control Link>

Subclasses

Definition

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

Primary Page in DRM Diagram:

• 17

Secondary Pages in DRM Diagram:

• 7

Example

1. Consider a <Geometry Model> of a building, containing a <Geometry Model Instance> of an elevator car, where both <Models> are specified in a 3D LSR SRF, and the elevator car is intended to be a moving part of the building model. The <LSR Transformation> used to instance the elevator model into the building shall specify a <Translation> component with a <Translation Control Link>.

   

   This <Translation Control Link> specifies:

   • A <Literal>, defining the lower limit (the bottom of the elevator shaft) of the translation, in this case, 0.0 metres.

   • A <Literal>, defining the upper limit (the top of the elevator shaft) of the translation, in this case, 500.0 metres.

   • A <Variable>, the actual translation of the elevator along the elevator shaft's z axis at any given moment.

     The <Variable>'s meaning = { SE_ELEM_CODE_TYP_VARIABLE, { SE_VAR_CODE_TRANSLATION_AMOUNT }}

     The <Variable>'s value_unit = EUC_METRE and its ESC_UNI, because <Translation>, by definition, defines its fields in metres.

FAQs

No FAQs supplied.

Constraints

• <<Publishable Object>>

Composed of (two-way) (inherited)

• one or more {ordered} <Expression> instances

Component of (two-way)

• one or more <Translation> instances

Inherited Field Elements

Field Elements

Notes

Fields Notes

description

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

expr_index

 For a given <Translation Control Link> instance C, expr_index
 serves as a 1-based index into the ordered <Expression>
 components of C such that the specific <Expression> selected
 specifies the value of the translation_amount field of each
 <Translation> controlled by C.

lower_expr_index

 For a given <Translation Control Link> instance C, if
 lower_expr_index > 0, it serves as a 1-based index into the
 ordered <Expression> components of C such that the specific
 <Expression> selected specifies the lower limit for the
 translation_amount of each <Translation> controlled by C.
 If lower_expr_index = 0, it indicates that no such lower limit
 is being specified.

upper_expr_index

 For a given <Translation Control Link> instance C, if
 upper_expr_index > 0, it serves as a 1-based index into the
 ordered <Expression> components of C such that the specific
 <Expression> selected specifies the upper limit for the
 translation_amount of each <Translation> controlled by C.
 If upper_expr_index = 0, it indicates that no such upper limit
 is being specified.