Java HSL Color Convert HSLtoRGB(double h, double s, double l)

Description

Converts HSL to RGB.

License

LGPL

Parameter

Parameter	Description
h	red value
s	green value
l	blue value

Return

Array containing RGB values in the format {r,g,b}

Declaration

public static int[] HSLtoRGB(double h, double s, double l) 

Method Source Code

//package com.java2s;
//License from project: LGPL 

public class Main {
    /**/*from   w  ww. j a v a  2s.c om*/
     * Converts HSL to RGB.
     * HSL values are in decimal form: <br>
     * H: 360 = 1, <br>
     * S: 100 = 1, <br>
     * L: 100 = 1. <br>
     * Thanks to http://serennu.com/colour/rgbtohsl.php for help on this calculation.
     *
     * @param h red value
     * @param s green value
     * @param l blue value
     * @return Array containing RGB values in the format {r,g,b}
     */
    public static int[] HSLtoRGB(double h, double s, double l) {
        int r;
        int g;
        int b;

        double var1;
        double var2;

        if (s == 0) {
            r = (int) (l * 255);
            g = (int) (l * 255);
            b = (int) (l * 255);
        } else {
            if (l < 0.5) {
                var2 = l * (1 + s);
            } else {
                var2 = (l + s) - (s * l);
            }

            var1 = 2 * l - var2;
            r = (int) (255 * HueToRGB(var1, var2, h + (1.0 / 3.0)));
            g = (int) (255 * HueToRGB(var1, var2, h));
            b = (int) (255 * HueToRGB(var1, var2, h - (1.0 / 3.0)));
        }

        int[] rgb = new int[3];
        rgb[0] = r;
        rgb[1] = g;
        rgb[2] = b;
        return rgb;
    }

    public static double HueToRGB(double v1, double v2, double vh) {
        if (vh < 0) {
            vh += 1;
        }
        if (vh > 1) {
            vh -= 1;
        }
        if ((6 * vh) < 1) {
            return (v1 + (v2 - v1) * 6 * vh);
        }
        if ((2 * vh) < 1) {
            return (v2);
        }
        if ((3 * vh) < 2) {
            return (v1 + (v2 - v1) * ((2.0 / 3.0 - vh) * 6));
        }
        return v1;
    }
}

Related

1. hsl2rgb(double h, double s, double l)
2. hsl2rgb(float h, float s, float l)
3. hsl2rgb(int[] hsl)
4. hsla_hue(double h, double m1, double m2)
5. hslToHsb(float[] inputHsl)
6. hslToRgb(double h, double s, double l)
7. hslToRgb(double hue, double sat, double lum)
8. HSLtoRGB(float h, float s, float l)
9. HslToRgb(float h, float s, float l, float a)