Detailed Description

Representation for the hue-saturation-lightness-alpha color model.

See Wikipedia for details on color models.

Definition at line 155 of file ge211_color.hxx.

Public Member Functions
	HSLA (double hue, double saturation, double lightness, double alpha=1.0)
	Constructs a hue-saturation-lightness-alpha color from its unit interval components.

Color	to_rgba () const
	Converts color to the RGBA color model.

Transformations
HSLA	rotate_hue (double degrees) const
	Returns a color by rotating the hue, leaving the other properties.

HSLA	saturate (double unit_amount) const
	Produces a fuller tone by saturating the color. More...

HSLA	desaturate (double unit_amount) const
	Produces a weaker tone by desaturating the color. More...

HSLA	lighten (double unit_amount) const
	Produces a tint by lightening the color. More...

HSLA	darken (double unit_amount) const
	Produces a shade by darkening the color. More...

HSLA	fade_in (double unit_amount) const
	Increases opacity of the color. More...

HSLA	fade_out (double unit_amount) const
	Decreases opacity of the color. More...

Public Attributes
double	hue
	The hue in degrees from 0 to 360. More...

double	saturation
	The fullness of the color, from 0.0 (grey) to 1.0 (fully saturated).

double	lightness
	The lightness of the color, from 0.0 (black) to 1.0 (white).

double	alpha
	The opacity of the color, from 0.0 (fully transparent) to 1.0 (fully opaque).

Member Function Documentation

◆ darken()

Color::HSLA darken ( double unit_amount ) const

Produces a shade by darkening the color.

The unit_amount must be between 0 and 1, where 0 leaves the color the same, and 1 produces black.

Definition at line 233 of file ge211_color.cxx.

◆ desaturate()

Color::HSLA desaturate ( double unit_amount ) const

Produces a weaker tone by desaturating the color.

The unit_amount must be between 0 and 1, where 0 leaves the color the same, and 1 produces gray at the same lightness as the original color.

Definition at line 223 of file ge211_color.cxx.

◆ fade_in()

Color::HSLA fade_in ( double unit_amount ) const

Increases opacity of the color.

The unit_amount must be between 0 and 1, where 0 leaves the color the same, and 1 produces a fully opaque color.

Definition at line 238 of file ge211_color.cxx.

◆ fade_out()

Color::HSLA fade_out ( double unit_amount ) const

Decreases opacity of the color.

The // unit_amount must be between 0 and 1, where 0 leaves the color the same, and 1 produces full transparency.

Definition at line 243 of file ge211_color.cxx.

◆ lighten()

Color::HSLA lighten ( double unit_amount ) const

Produces a tint by lightening the color.

The amount must be between 0 and 1, where 0 leaves the color the same, and 1 produces white.

Definition at line 228 of file ge211_color.cxx.

◆ saturate()

Color::HSLA saturate ( double unit_amount ) const

Produces a fuller tone by saturating the color.

The unit_amount must be between 0 and 1, where 0 leaves the color the same, and 1 produces a fully saturated color.

Definition at line 218 of file ge211_color.cxx.

Member Data Documentation

◆ hue

double hue

The hue in degrees from 0 to 360.

0° (and 360°) is red, 120° is green, and 240° is blue.

Definition at line 159 of file ge211_color.hxx.

The documentation for this struct was generated from the following files:

/Users/tov/school/cs211/dev/ge211/include/ge211_color.hxx
/Users/tov/school/cs211/dev/ge211/src/ge211_color.cxx