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The SEDRIS Data Representation Model
APPENDIX A - Classes Rotation Control Link |
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An instance of this DRM class is a specialized <Control Link> instance provides the connection between an ordered aggregation of <Expression> components and the target fields of one or more <Rotation> instances.
A <Model> instance representing a weather vane has a <Geometry Model> component with a <Union Of Geometry Hierarchy> component, to which is attached an <LSR Transformation> component with a <Rotation> component, indicating that the weather vane can turn to match the direction that the wind is blowing. The <Rotation> instance has a <Rotation Control Link> component, which changes the angle of rotation to match the wind direction.
See the <Property Table Reference Control Link> class, second example.
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The description field specifies a text description of the purpose of the <Control Link> instance.
The expression_index field specifies which <Expression> component specifies the angle field value of the affected <Rotation> instances, by specifying a one-based index into the ordered aggregation of <Expression> components.
The lower_expression_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 one-based index into the ordered aggregation of <Expression> components.
The upper_expression_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 one-based index into the ordered aggregation of <Expression> components.
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