yiqa
YIQ colors

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<yiqa> ( y in-phase quadrature alpha -- yiqa )

Vocabulary
colors.yiq

Class description
The class of YIQ (Y, In-Place, Quadrature) colors with an alpha channel. All slots store values in the interval [0,1].

Definition

IN: colors.yiq

TUPLE: yiqa
    { y read-only } { in-phase read-only }
    { quadrature read-only } { alpha read-only } ;

Methods

USING: accessors colors colors.yiq combinators kernel math
math.order ;

M: yiqa >rgba
    { [ y>> ] [ in-phase>> ] [ quadrature>> ] [ alpha>> ] }
    cleave [
        [
            [ 0.9468822170900693 * ] [ 0.6235565819861433 * ]
            bi* + +
        ] [
            [ 0.27478764629897834 * ] [ 0.6356910791873801 * ]
            bi* + -
        ] [
            [ 1.1085450346420322 * ] [ 1.7090069284064666 * ]
            bi* - -
        ] 3tri [ 0.0 1.0 clamp ] tri@
    ] dip <rgba> ; inline


USING: colors.yiq ;

M: yiqa >yiqa ; inline