Class ColorMath

java.lang.Object

dev.despical.pixelpainter.core.ColorMath

public final class ColorMath
extends Object

Converts sRGB samples into Oklab and measures perceptual color distance.

Conversion linearizes the three color channels before transforming them. No Bukkit state or mutable shared cache is used, so matching may run on background image workers.

Method Summary

Modifier and Type	Method	Description
static double	distance(double[] a, double[] b)	Measures squared Euclidean distance between Oklab coordinates.
static double[]	lab(int rgb)	Converts an RGB sample into Oklab coordinates.

Methods inherited from class Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method Details

lab

public static double[] lab(int rgb)

Converts an RGB sample into Oklab coordinates.

Parameters:

rgb - packed sRGB sample; the alpha byte is ignored

Returns:

a new three-element array containing lightness, a and b

distance

public static double distance(double[] a,
 double[] b)

Measures squared Euclidean distance between Oklab coordinates.

Parameters:

a - first array with at least three elements

b - second array with at least three elements

Returns:

squared distance; smaller values represent closer colors