Class

• <DRM CMY Colour Control Link>

Superclass

• <DRM Control Link>

Subclass

• None.

Definition

An instance of this DRM class specifies a specialized <DRM Control Link> instance providing the connection between an ordered aggregation of <DRM Expression> components and the target fields of one or more <DRM CMY Colour> instances.

The cyan_expression_index field is a one-based index into the ordered aggregation of <DRM Expression> components and is used to select the specific <DRM Expression> component (if any) that controls the cyan field values of the cmy_data field(s) of the target <DRM CMY Colour> instance(s). If the value is zero, the cyan field of those <DRM CMY Colour> instance(s) is not controlled.

The magenta_expression_index field is a one-based index into the ordered aggregation of <DRM Expression> components and is used to select the specific <DRM Expression> component (if any) that controls the magenta field values of the cmy_data field(s) of the target <DRM CMY Colour> instance(s). If the value is zero, the magenta field of those <DRM CMY Colour> instance(s) is not controlled.

The yellow_expression_index field is a one-based index into the ordered aggregation of <DRM Expression> components and is used to select the specific <DRM Expression> component (if any) that controls the yellow field values of the cmy_data field(s) of the target <DRM CMY Colour> instance(s). If the value is zero, the yellow field of those <DRM CMY Colour> instance(s) is not controlled.

Class diagram

Figure 6.36 — DRM_CMY_Colour_Control_Link

Constraints

• <DRM Control Link> constraints
• Publishable object

Example(s)

• Consider a transmittal, produced with CMY colours, the <DRM Model Library> instance of which contains a <DRM Model> component representing a car with a <DRM Geometry Model> instance, the geometry of which consists of <DRM Polygon> instances with <DRM Inline Colour> components.

  This car model is instanced in many places throughout the transmittal, and the data provider wishes to vary its appearance depending on the <DRM Geometry Model Instance> instance. Consequently, each <DRM CMY Colour> instance in the <DRM Model> instance has a <DRM CMY Colour Control Link> component, supplying the value of the yellow field of the cmy_data field of the <DRM CMY Colour> instance with a <DRM Variable> component as depicted in Figure 6.37:

  

  Figure 6.37 — <DRM CMY Colour Control Link> example