Class

• <DRM Translucency>

Superclass

• <DRM SEDRIS Abstract Base>

Subclass

• None.

Definition

An instance of this DRM class specifies the proportion of light that can pass through the given <DRM Colour> instance, where translucency_value = 0,0 indicates that no light passes through (i.e., is fully opaque), and translucency_value = 1,0 indicates a fully transparent object.

NOTE  An object’s opacity is equal to 1,0 - translucency_value. Opacity is termed the alpha of the object. Alpha values can be specified for images as part of a <DRM Image> instance.

The translucency_value field specifies the proportion of light that can pass through the given <DRM Colour> instance. For a <DRM Translucency> instance with a <DRM Translucency Control Link> component, the value of the translucency_value field is obtained from that <DRM Translucency Control Link> component.

Class diagram

Figure 6.358 — DRM_Translucency

Constraints

• Publishable object

Example(s)

• The alpha value for an ambient, OTW colour can be represented in a transmittal as a <DRM Inline Colour> instance with a <DRM Ambient Colour> component and a <DRM Translucency> component whose translucency_value field is set to 1,0 - alpha.