HSVColor class
A color represented using alpha, hue, saturation, and value.
An HSVColor is represented in a parameter space that's based on human perception of color in pigments (e.g. paint and printer's ink). The representation is useful for some color computations (e.g. rotating the hue through the colors), because interpolation and picking of colors as red, green, and blue channels doesn't always produce intuitive results.
The HSV color space models the way that different pigments are perceived when mixed. The hue describes which pigment is used, the saturation describes which shade of the pigment, and the value resembles mixing the pigment with different amounts of black or white pigment.
See also:
- HSLColor, a color that uses a color space based on human perception of colored light.
- HSV and HSL Wikipedia article, which this implementation is based upon.
- Annotations
Constructors
- HSVColor.fromAHSV(double alpha, double hue, double saturation, double value)
-
Creates a color.
const
- HSVColor.fromColor(Color color)
-
Creates an HSVColor from an RGB Color.
factory
Properties
- alpha → double
-
Alpha, from 0.0 to 1.0. The describes the transparency of the color.
A value of 0.0 is fully transparent, and 1.0 is fully opaque.
final
- hashCode → int
-
The hash code for this object.
no setteroverride
- hue → double
-
Hue, from 0.0 to 360.0. Describes which color of the spectrum is
represented. A value of 0.0 represents red, as does 360.0. Values in
between go through all the hues representable in RGB. You can think of
this as selecting which pigment will be added to a color.
final
- runtimeType → Type
-
A representation of the runtime type of the object.
no setterinherited
- saturation → double
-
Saturation, from 0.0 to 1.0. This describes how colorful the color is.
0.0 implies a shade of grey (i.e. no pigment), and 1.0 implies a color as
vibrant as that hue gets. You can think of this as the equivalent of
how much of a pigment is added.
final
- value → double
-
Value, from 0.0 to 1.0. The "value" of a color that, in this context,
describes how bright a color is. A value of 0.0 indicates black, and 1.0
indicates full intensity color. You can think of this as the equivalent of
removing black from the color as value increases.
final
Methods
-
noSuchMethod(
Invocation invocation) → dynamic -
Invoked when a nonexistent method or property is accessed.
inherited
-
toColor(
) → Color - Returns this color in RGB.
-
toString(
) → String -
A string representation of this object.
override
-
withAlpha(
double alpha) → HSVColor -
Returns a copy of this color with the
alphaparameter replaced with the given value. -
withHue(
double hue) → HSVColor -
Returns a copy of this color with the
hueparameter replaced with the given value. -
withSaturation(
double saturation) → HSVColor -
Returns a copy of this color with the
saturationparameter replaced with the given value. -
withValue(
double value) → HSVColor -
Returns a copy of this color with the
valueparameter replaced with the given value.
Operators
-
operator ==(
Object other) → bool -
The equality operator.
override