COS126

• Download ColorHSB.java

/******************************************************************************
 *  Name:    Reference Solution
 *  NetID:   ref
 *  Precept: P00
 *
 *  Description:  Represent a color in HSB format.
 * 
 ******************************************************************************/

public class ColorHSB { 
    private final int hue;          // the hue (between 0 and 359)
    private final int saturation;   // the saturation (between 0 and 100)
    private final int brightness;   // the brightness (between 0 and 100)

    // create a new color with specified hue, saturation, and brightness components
    public ColorHSB(int h, int s, int b) {
        hue = h;
        saturation = s;
        brightness = b;
    }

    // string representation in the format (h, s, b)
    public String toString() {
        return "(" + hue + ", " + saturation + ", " + brightness + ")";
    }

    // is the color a shade of gray?
    public boolean isGrayscale() {
        return saturation == 0 || brightness == 0;
    }

    // squared distance between the two colors
    public int distanceSquaredTo(ColorHSB that) {
        int dh1 = this.hue - that.hue;
        int dh2 = 360 - Math.abs(dh1);
        int ds = this.saturation - that.saturation;
        int db = this.brightness - that.brightness;
        return Math.min(dh1*dh1, dh2*dh2)  + ds*ds + db*db;
    }

    public static void main(String[] args) {

        // the color specified on the command line
        int h0 = Integer.parseInt(args[0]);
        int s0 = Integer.parseInt(args[1]);
        int b0 = Integer.parseInt(args[2]);
        ColorHSB color0 = new ColorHSB(h0, s0, b0);

        // the champion color name (and corresponding distance and color)
        String closestName = null;
        int closestDistance = Integer.MAX_VALUE;
        ColorHSB closestColor = null;

        // read colors from standard input and find closest color
        while (!StdIn.isEmpty()) {

            // read next color from standard input
            String name = StdIn.readString();
            int h = StdIn.readInt();
            int s = StdIn.readInt();
            int b = StdIn.readInt();
            ColorHSB color = new ColorHSB(h, s, b);

            // update champion color if closer
            int distance = color0.distanceSquaredTo(color);
            if (distance < closestDistance) {
                closestDistance = distance;
                closestName = name;
                closestColor = color;
            }
        }

        // print closest color to standard output
        StdOut.println(closestName + " " + closestColor);
    }
}