3D Graphics Programming with QuickDraw 3D 1.5.4

Transparency Color

Labels

ASCII: TransparencyColor
Binary: kxpr ( = 0x6B787072 )

Data Format



 
ColorRGB            transparency

transparency: A structure having three fields: red, green, blue. The permitted values of these fields are 32-bit floating-point numbers in the closed interval [0, 1], where 0 is the minimum value and 1 is the maximum value.

Data Size

Description

A transparency color attribute affects the amount of color allowed to pass through an object that is not opaque. The transparency color values are multiplied by the color values of obscured objects during pixel color computations. Thus, the transparency color values ( 1 1 1 ) indicate complete transparency and the values ( 0 0 0 ) indicate complete opacity. The values ( 0 1 0 ) indicate that all light in the green color channel is allowed to pass through the foreground object, and no light in the red and blue channels is allowed to pass through the foreground object.

Parent Hierarchy

Element, attribute.

Parent Objects

Attribute sets. A transparency color object always has a parent object.

Child Objects

None.

Example



 
Container (

    AttributeSet ( )

    TransparencyColor ( .5 .5 .5 ) 

)