Crea un reloj analógico

Objetivo: crear un reloj analógico que funcione con cualquier lenguaje de programación.

Requisitos:

• Su reloj debe presentar al menos los indicadores de hora y minutos.
• El reloj producido podría tener la forma de una imagen, una animación o un arte ASCII.
• Se espera que el reloj muestre la hora local.

Opcional:

• Puede hacer que su reloj muestre el puntero de segundos además de los punteros de minutos y horas.
• También puede hacer que la zona horaria sea configurable si lo desea.
• Usted es libre de elegir si puede descuidar o manejar los problemas relacionados con los segundos bisiestos.
• Puede pensar en lo que le sucede a su programa si el usuario ajusta el reloj del sistema o si se produce un cambio de luz natural.

Dado que este es un concurso de popularidad , sea creativo y dibuje algunos relojes bonitos y hermosos para merecer los votos positivos. La respuesta más votada gana , con la excepción de que no aceptaré mi propia respuesta.

Finalmente, se recomienda (pero no es obligatorio) que publique al menos una captura de pantalla (o salida de texto en el caso de ASCII-art) de su reloj en su respuesta. De esta manera, las personas no necesitarán compilarlo y ejecutarlo para ver qué es.

Esta pregunta está destinada a revivir una pregunta eliminada.

Tenga en cuenta que no es un duplicado de esta otra pregunta . Esa pregunta era un código de golf que pedía arte ASCII. Este no está restringido al arte ASCII y es un concurso de popularidad , por lo que se espera que las respuestas sean muy diferentes.

SVG + Javascript

▶▶▶ Demo en vivo aquí ◀◀◀

Esto utiliza las funciones de animación incorporadas de SVG para girar las manecillas, con un poco de Javascript adicional para obtener la hora local y establecer las posiciones iniciales de las manecillas. Funciona bien en Chrome y Safari, y debería ser compatible con la mayoría de los navegadores modernos, ya que no utiliza ningún efecto de filtro.

<?xml version="1.0"?>
<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" viewBox="0 0 400 400" width="400" height="400" version="1.0">
  <defs>
    <linearGradient id="a" x1="0%" y1="100%" x2="0%" y2="0%">
      <stop offset="0%" style="stop-color:#777799"/>
      <stop offset="100%" style="stop-color:#ffffff"/>
    </linearGradient>
    <linearGradient id="b" x1="0%" y1="100%" x2="0%" y2="0%">
      <stop offset="0%" style="stop-color:#ffffff"/>
      <stop offset="25%" style="stop-color:#b6b6cc"/>
      <stop offset="40%" style="stop-color:#515177"/>
      <stop offset="48%" style="stop-color:#ffffff"/>
      <stop offset="56%" style="stop-color:#ffffff"/>
      <stop offset="75%" style="stop-color:#8b8baa"/>
      <stop offset="98%" style="stop-color:#efeff4"/>
      <stop offset="100%" style="stop-color:#fbfbfc"/>
    </linearGradient>
    <linearGradient id="c" x1="0%" y1="100%" x2="0%" y2="0%">
      <stop offset="0%" style="stop-color:#ffffff"/>
      <stop offset="100%" style="stop-color:#777799"/>
    </linearGradient>
    <radialGradient id="d" cx="50%" cy="50%" r="50%" fx="50%" fy="50%">
      <stop offset="0%" style="stop-color:#ffffff"/>
      <stop offset="40%" style="stop-color:#ffffff"/>
      <stop offset="70%" style="stop-color:#e6e6ee"/>
      <stop offset="92%" style="stop-color:#b6b6cc"/>
      <stop offset="100%" style="stop-color:#636388"/>
    </radialGradient>
    <radialGradient id="e" cx="50%" cy="150%" r="200%" fx="50%" fy="150%">
      <stop offset="0%" style="stop-color:#ffffff;stop-opacity:0"/>
      <stop offset="59%" style="stop-color:#ffffff;stop-opacity:0"/>
      <stop offset="60%" style="stop-color:#ffffff;stop-opacity:0.6"/>
      <stop offset="70%" style="stop-color:#ffffff;stop-opacity:0.3"/>
      <stop offset="100%" style="stop-color:#ffffff;stop-opacity:0.0"/>
    </radialGradient>
  </defs>
  <g transform="translate(200 200)">
    <circle cx="0" cy="0" r="200" fill="#cecedd"/>
    <circle cx="0" cy="0" r="196" stroke="url(#a)" stroke-width="5" fill="url(#b)"/>
    <circle cx="0" cy="0" r="170" stroke="url(#c)" stroke-width="4" fill="url(#d)"/>
    <circle cx="0" cy="0" r="172" stroke="#ffffff" stroke-width="0.5" fill="none"/>
    <circle cx="0" cy="0" r="193.5" stroke="#ffffff" stroke-width="0.5" fill="none"/>
    <g id="O">
      <polygon points="4,155 4,130 -4,130 -4,155" style="fill:#777799;stroke:#313155;stroke-width:1"/>
      <polygon points="4,-155 4,-130 -4,-130 -4,-155" style="fill:#777799;stroke:#313155;stroke-width:1"/>
    </g>
    <g transform="rotate(30)"><use xlink:href="#O"/></g>
    <g transform="rotate(60)"><use xlink:href="#O"/></g>
    <g transform="rotate(90)"><use xlink:href="#O"/></g>
    <g transform="rotate(120)"><use xlink:href="#O"/></g>
    <g transform="rotate(150)"><use xlink:href="#O"/></g>
    <polygon id="h" points="6,-80 6,18 -6,18 -6,-80" style="fill:#232344">
      <animateTransform id="ht" attributeType="xml" attributeName="transform" type="rotate" from="000" to="000" begin="0" dur="86400s" repeatCount="indefinite"/>
    </polygon>
    <polygon id="m" points="3.5,-140 3.5,23 -3.5,23 -3.5,-140" style="fill:#232344">
      <animateTransform id="mt" attributeType="xml" attributeName="transform" type="rotate" from="000" to="000" begin="0" dur="3600s" repeatCount="indefinite"/>
    </polygon>
    <polygon id="s" points="2,-143 2,25 -2,25 -2,-143" style="fill:#232344">
      <animateTransform id="st" attributeType="xml" attributeName="transform" type="rotate" from="000" to="000" begin="0" dur="60s" repeatCount="indefinite"/>
    </polygon>
    <circle cx="0" cy="0" r="163" fill="url(#e)"/>
  </g>
  <script type="text/javascript"><![CDATA[
    var d = new Date();
    var s = d.getSeconds();
    var m = d.getMinutes() + s/60;
    var h = (d.getHours() % 12) + m/60 + s/3600;
    document.getElementById('st').setAttribute('from',s*6);
    document.getElementById('mt').setAttribute('from',m*6);
    document.getElementById('ht').setAttribute('from',h*30);
    document.getElementById('st').setAttribute('to',360+s*6);
    document.getElementById('mt').setAttribute('to',360+m*6);
    document.getElementById('ht').setAttribute('to',360+h*30);
  ]]></script>
</svg>

Java 8

Hice un reloj que cambia sus colores según la hora del día, mostrando la hora local. A medida que pasa el tiempo, cambiará lentamente de color, usando colores más brillantes durante el día y colores más oscuros por la noche.

La ventana puede cambiar de tamaño y el reloj cambiará automáticamente de tamaño al tamaño que elija.

Además, si el usuario ajusta el reloj del sistema o si ocurre un cambio en el horario de verano, el reloj lo reflejará automáticamente.

Hay dos formas de ejecutarlo:

1. Ejecutando el ClockDemoarchivo, es decir java clock.ClockDemo. Esto abrirá una ventana y verá el reloj allí.

2. Ejecutando el ClockSavearchivo, es decir java clock.ClockSave filename width height [HH:mm:ss]. Esto solo guardará el reloj en un archivo PNG con el nombre de archivo dado, ancho y alto. El reloj se dibujará con la hora dada, o si se omite, con la hora actual. Por ejemplo, si lo ejecuta java clock.ClockSave clock.png 600 500 12:38:24, guardará el reloj en una imagen de 600x500 en un clock.pngarchivo y el reloj mostrará 12:38:24 AM. Use horas en el intervalo 00-23.

Capturas de pantalla

Aquí hay algunas capturas de pantalla y archivos generados:

00:36:50 AM:

02:38:51 am:

06:42:13 am:

11:15:28 am:

05:02:37 pm:

07:11:30 pm:

09:29:34 p.m.

Código fuente

Separé la fuente en cinco archivos diferentes en un paquete llamado clock.

También disponible en GitHub .

ClockDemo.java

package clock;

import java.awt.EventQueue;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import javax.swing.JFrame;

public class ClockDemo {
    public static void main(String[] args) {
        EventQueue.invokeLater(ClockDemo::runIt);
    }

    private static void runIt() {
        final JFrame j = new JFrame();
        j.setTitle("JClock");
        final JClock clock = new JClock(new CoolPaint());

        j.addWindowListener(new WindowAdapter() {
            @Override
            public void windowClosing(WindowEvent e) {
                clock.stop();
                j.dispose();
            }
        });

        j.add(clock);
        j.setBounds(20, 20, 600, 500);
        j.setVisible(true);
        clock.start();
    }
}

ClockSave.java

package clock;

import java.io.IOException;
import java.time.LocalTime;
import java.time.format.DateTimeFormatter;
import java.time.format.DateTimeParseException;

public class ClockSave {
    public static void main(String[] args) {

        // Too much arguments.
        if (args.length < 3 || args.length > 4) {
            System.out.println("Bad usage: Should be java clock.ClockSave filename width height [HH:mm:ss]");
            return;
        }

        // Parse the image size.
        int h, w;
        try {
            w = Integer.parseInt(args[1]);
            h = Integer.parseInt(args[2]);
        } catch (NumberFormatException e) {
            System.out.println("Bad usage: Should be java clock.ClockSave filename width height [HH:mm:ss]");
            return;
        }

        // Parse the intended time.
        LocalTime time;
        if (args.length == 4) {
            try {
                DateTimeFormatter df = DateTimeFormatter.ofPattern("HH:mm:ss");
                time = LocalTime.parse(args[3], df);
            } catch (DateTimeParseException e) {
                System.out.println("Bad usage: Should be java clock.ClockSave filename width height [HH:mm:ss]");
                return;
            }
        } else {
            time = LocalTime.now();
        }

        // Save to an image.
        try {
            new CoolPaint().saveClock(w, h, time, args[0]);
        } catch (IOException e) {
            System.out.println("Error on image output: " + e.getMessage());
        }
    }
}

JClock.java

package clock;

import java.awt.Graphics;
import java.awt.Graphics2D;
import java.time.LocalTime;
import java.time.temporal.ChronoField;
import javax.swing.JComponent;

public class JClock extends JComponent {
    private static final long serialVersionUID = 1L;

    private final CoolPaint paint;
    private final Object lock;
    private Thread updater;

    public JClock(CoolPaint paint) {
        this.paint = paint;
        this.lock = new Object();
    }

    private void runClock() {
        int lastTime = -1;
        try {
            while (isRunning()) {
                Thread.sleep(10);
                int t = time();
                if (t != lastTime) {
                    lastTime = t;
                    repaint();
                }
            }
        } catch (InterruptedException e) {
            // Do nothing, the thread will die naturally.
        }
    }

    private int time() {
        return LocalTime.now().get(ChronoField.SECOND_OF_DAY);
    }

    private boolean isRunning() {
        synchronized (lock) {
            return updater == Thread.currentThread();
        }
    }

    public void start() {
        synchronized (lock) {
            if (updater != null) return;
            updater = new Thread(this::runClock);
            updater.start();
        }
    }

    public void stop() {
        synchronized (lock) {
            updater = null;
        }
    }

    @Override
    public void paintComponent(Graphics g) {
        paint.paintClock(getWidth(), getHeight(), time(), (Graphics2D) g);
    }
}

ClockPaint.java

package clock;

import java.awt.Graphics2D;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.IOException;
import java.time.LocalTime;
import java.time.temporal.ChronoField;
import javax.imageio.ImageIO;

public interface ClockPaint {

    public void paintClock(int width, int height, int seconds, Graphics2D g2);

    public default void paintClock(int width, int height, LocalTime time, Graphics2D g2) {
        paintClock(width, height, time.get(ChronoField.SECOND_OF_DAY), g2);
    }

    public default void paintClock(int width, int height, Graphics2D g2) {
        paintClock(width, height, LocalTime.now(), g2);
    }

    public default void saveClock(int width, int height, String fileName) throws IOException {
        saveClock(width, height, LocalTime.now(), fileName);
    }

    public default void saveClock(int width, int height, LocalTime time, String fileName) throws IOException {
        saveClock(width, height, time.get(ChronoField.SECOND_OF_DAY), fileName);
    }

    public default void saveClock(int width, int height, int seconds, String fileName) throws IOException {
        BufferedImage image = new BufferedImage(width, height, BufferedImage.TYPE_INT_ARGB);
        paintClock(width, height, seconds, (Graphics2D) image.getGraphics());
        String f = fileName.endsWith(".png") ? fileName : fileName + ".png";
        ImageIO.write(image, "png", new File(f));
    }
}

CoolPaint.java

package clock;

import java.awt.BasicStroke;
import java.awt.Color;
import java.awt.Font;
import java.awt.FontMetrics;
import java.awt.GradientPaint;
import java.awt.Graphics2D;
import java.awt.RadialGradientPaint;
import java.awt.RenderingHints;
import java.awt.geom.AffineTransform;
import java.awt.geom.Point2D;

public class CoolPaint implements ClockPaint {

    private static final int SECONDS_IN_MINUTE = 60;
    private static final int SECONDS_IN_HALF_HOUR = 30 * SECONDS_IN_MINUTE;
    private static final int SECONDS_IN_HOUR = 60 * SECONDS_IN_MINUTE;
    private static final int SECONDS_IN_12_HOURS = 12 * SECONDS_IN_HOUR;

    private static final int AM_0_00 = 0;
    private static final int AM_3_00 = 3 * SECONDS_IN_HOUR;
    private static final int AM_4_30 = 4 * SECONDS_IN_HOUR + SECONDS_IN_HALF_HOUR;
    private static final int AM_7_30 = 7 * SECONDS_IN_HOUR + SECONDS_IN_HALF_HOUR;
    private static final int AM_12_00 = 12 * SECONDS_IN_HOUR;
    private static final int PM_4_30 = 16 * SECONDS_IN_HOUR + SECONDS_IN_HALF_HOUR;
    private static final int PM_7_30 = 19 * SECONDS_IN_HOUR + SECONDS_IN_HALF_HOUR;
    private static final int PM_9_00 = 21 * SECONDS_IN_HOUR;
    private static final int PM_12_00 = 24 * SECONDS_IN_HOUR;

    private static final Color BLACK = new Color(0, 0, 0);
    private static final Color DARK_GRAY = new Color(32, 32, 32);
    private static final Color DARK_BLUE = new Color(0, 0, 128);
    private static final Color PURPLE = new Color(128, 0, 128);
    private static final Color CYAN = new Color(0, 255, 255);
    private static final Color YELLOW = new Color(225, 225, 0);
    private static final Color PALE_YELLOW = new Color(224, 224, 64);
    private static final Color RED = new Color(255, 0, 0);
    private static final Color GREEN = new Color(0, 255, 0);
    private static final Color LIGHT_BLUE = new Color(128, 128, 255);
    private static final Color SKY_CYAN = new Color(48, 224, 224);

    private static final Color[] COLOR_CYCLE = {
        DARK_GRAY, LIGHT_BLUE, RED, PALE_YELLOW, GREEN, SKY_CYAN, LIGHT_BLUE, DARK_GRAY
    };

    private static final int RADIAL_PERIOD_LENGTH = PM_12_00 / COLOR_CYCLE.length;
    private static final String[] ROMAN = {"", "I", "II", "III", "IV", "V", "VI", "VII", "VIII", "IX", "X", "XI", "XII"};

    private static class Painter {
        private final int width;
        private final int height;
        private final int seconds;
        private final int radius;
        private final Graphics2D g2;
        private final int cx;
        private final int cy;
        private final int secondColorIndex;
        private final int secondsInPeriod;
        private final Color pointersAndNumbersColor;

        public Painter(int width, int height, int seconds, Graphics2D g2) {
            this.width = width;
            this.height = height;
            this.seconds = seconds;
            this.radius = Math.min(width / 2, height / 2);
            this.cx = width / 2;
            this.cy = height / 2;
            this.g2 = g2;
            g2.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
            this.secondColorIndex = seconds / RADIAL_PERIOD_LENGTH;
            this.secondsInPeriod = seconds % RADIAL_PERIOD_LENGTH;

            int startIndex = (secondColorIndex + COLOR_CYCLE.length + 5) % COLOR_CYCLE.length;
            int endIndex = (secondColorIndex + COLOR_CYCLE.length + 6) % COLOR_CYCLE.length;
            Color color1 = COLOR_CYCLE[startIndex];
            Color color2 = COLOR_CYCLE[endIndex];
            this.pointersAndNumbersColor = mixColors(color1, color2, 0, RADIAL_PERIOD_LENGTH, secondsInPeriod);
        }

        private int mixColorComponent(int startComponent, int endComponent, double position) {
            int difference = endComponent - startComponent;
            return startComponent + (int) (difference * position);
        }

        private Color mixColors(Color startColor, Color endColor, int startTime, int endTime, int currentTime) {
            double normalized = (currentTime - startTime) / (double) (endTime - startTime);
            return new Color(
                    mixColorComponent(startColor.getRed(), endColor.getRed(), normalized),
                    mixColorComponent(startColor.getGreen(), endColor.getGreen(), normalized),
                    mixColorComponent(startColor.getBlue(), endColor.getBlue(), normalized));
        }

        private Color upperBackgroundColor() {
            if (seconds < 0) throw new IllegalArgumentException();
            if (seconds <= AM_3_00) return BLACK;
            if (seconds <= AM_4_30) return mixColors(BLACK, DARK_BLUE, AM_3_00, AM_4_30, seconds);
            if (seconds <= AM_7_30) return mixColors(DARK_BLUE, CYAN, AM_4_30, AM_7_30, seconds);
            if (seconds <= AM_12_00) return CYAN;
            if (seconds <= PM_4_30) return CYAN;
            if (seconds <= PM_7_30) return mixColors(CYAN, DARK_BLUE, PM_4_30, PM_7_30, seconds);
            if (seconds <= PM_9_00) return mixColors(DARK_BLUE, BLACK, PM_7_30, PM_9_00, seconds);
            if (seconds <= PM_12_00) return BLACK;
            throw new IllegalArgumentException();
        }

        private Color lowerBackgroundColor() {
            if (seconds < 0) throw new IllegalArgumentException();
            if (seconds <= AM_3_00) return mixColors(BLACK, DARK_BLUE, AM_0_00, AM_3_00, seconds);
            if (seconds <= AM_4_30) return mixColors(DARK_BLUE, PURPLE, AM_3_00, AM_4_30, seconds);
            if (seconds <= AM_7_30) return mixColors(PURPLE, YELLOW, AM_4_30, AM_7_30, seconds);
            if (seconds <= AM_12_00) return mixColors(YELLOW, CYAN, AM_7_30, AM_12_00, seconds);
            if (seconds <= PM_4_30) return mixColors(CYAN, YELLOW, AM_12_00, PM_4_30, seconds);
            if (seconds <= PM_7_30) return mixColors(YELLOW, PURPLE, PM_4_30, PM_7_30, seconds);
            if (seconds <= PM_9_00) return mixColors(PURPLE, DARK_BLUE, PM_7_30, PM_9_00, seconds);
            if (seconds <= PM_12_00) return mixColors(DARK_BLUE, BLACK, PM_9_00, PM_12_00, seconds);
            throw new IllegalArgumentException();
        }

        private void paintBackground() {
            Point2D p1 = new Point2D.Double(width / 2, 0);
            Point2D p2 = new Point2D.Double(width / 2, height);
            g2.setPaint(new GradientPaint(p1, upperBackgroundColor(), p2, lowerBackgroundColor()));
            g2.fillRect(0, 0, width, height);
        }

        private RadialGradientPaint colorOnCycle(Point2D center, float radius) {
            Color baseColor1 = COLOR_CYCLE[(secondColorIndex + COLOR_CYCLE.length - 1) % COLOR_CYCLE.length];
            Color baseColor2 = COLOR_CYCLE[secondColorIndex];
            Color baseColor3 = COLOR_CYCLE[(secondColorIndex + COLOR_CYCLE.length + 1) % COLOR_CYCLE.length];
            Color baseColor4 = COLOR_CYCLE[(secondColorIndex + COLOR_CYCLE.length + 2) % COLOR_CYCLE.length];

            Color start = mixColors(baseColor1, baseColor2, 0, RADIAL_PERIOD_LENGTH, secondsInPeriod);
            Color end = mixColors(baseColor3, baseColor4, 0, RADIAL_PERIOD_LENGTH, secondsInPeriod);
            float index2 = (RADIAL_PERIOD_LENGTH - secondsInPeriod) / (float) RADIAL_PERIOD_LENGTH / 2;
            float index3 = 0.5f + index2;
            float[] positions = index3 == 1.0 ? new float[] {0.0f, index2, 1.0f}
                    : new float[] {0.0f, index2, index3, 1.0f};
            Color[] colors = index3 == 1.0 ? new Color[] {start, baseColor2, end}
                    : new Color[] {start, baseColor2, baseColor3, end};

            return new RadialGradientPaint(center, radius, positions, colors);
        }

        private void paintClockArea() {
            Point2D center = new Point2D.Double(width / 2, height / 2);
            g2.setPaint(colorOnCycle(center, radius));
            g2.fillOval(width / 2 - radius, height / 2 - radius, radius * 2, radius * 2);
        }

        private double pointerRevolutionsToRadians(double angle) {
            return Math.toRadians((450 + angle * -360) % 360.0);
        }

        private void paintPointers() {
            double hAngle = pointerRevolutionsToRadians(seconds % SECONDS_IN_12_HOURS / (double) SECONDS_IN_12_HOURS);
            double mAngle = pointerRevolutionsToRadians(seconds % SECONDS_IN_HOUR / (double) SECONDS_IN_HOUR);
            double sAngle = pointerRevolutionsToRadians(seconds % SECONDS_IN_MINUTE / (double) SECONDS_IN_MINUTE);

            g2.setStroke(new BasicStroke(4.0f, BasicStroke.CAP_ROUND, BasicStroke.JOIN_ROUND));
            g2.drawLine(cx, cy, (int) (cx + Math.cos(hAngle) * radius * 0.55), (int) (cy - Math.sin(hAngle) * radius * 0.55));
            g2.drawLine(cx, cy, (int) (cx + Math.cos(mAngle) * radius * 0.85), (int) (cy - Math.sin(mAngle) * radius * 0.85));
            g2.setStroke(new BasicStroke(1.0f, BasicStroke.CAP_ROUND, BasicStroke.JOIN_ROUND));
            g2.drawLine(cx, cy, (int) (cx + Math.cos(sAngle) * radius * 0.85), (int) (cy - Math.sin(sAngle) * radius * 0.85));
        }

        private void paintNumbers() {
            Font originalFont = g2.getFont();
            double amplification = (int) Math.max(radius * 0.08, originalFont.getSize()) / (double) originalFont.getSize();
            AffineTransform at0 = AffineTransform.getScaleInstance(amplification, amplification);
            Font amplifiedFont = originalFont.deriveFont(at0);
            g2.setFont(amplifiedFont);
            FontMetrics fm = g2.getFontMetrics();

            for (int i = 1; i <= 12; i++) {
                double angle = pointerRevolutionsToRadians(i / 12.0);
                double textInclination = Math.toRadians(30 * i);
                AffineTransform at = AffineTransform.getRotateInstance(textInclination);
                at.scale(amplification, amplification);
                Font derivedFont = originalFont.deriveFont(at);
                g2.setFont(derivedFont);
                int pixelsOffset = fm.stringWidth(ROMAN[i]) / 2;
                int xPlot = (int) (cx + Math.cos(angle) * radius * 0.9 - pixelsOffset * Math.cos(textInclination));
                int yPlot = (int) (cy - Math.sin(angle) * radius * 0.9 - pixelsOffset * Math.sin(textInclination));
                g2.drawString(ROMAN[i], xPlot, yPlot);
            }
            g2.setFont(originalFont);
        }

        private void paintDots() {
            for (int i = 1; i < 60; i++) {
                if (i % 5 == 0) continue;
                double angle = pointerRevolutionsToRadians(i / 60.0);
                g2.fillRect((int) (cx + Math.cos(angle) * radius * 0.9) - 1, (int) (cy - Math.sin(angle) * radius * 0.9) - 1, 3, 3);
            }
        }

        public void paintClock() {
            paintBackground();
            paintClockArea();

            g2.setColor(pointersAndNumbersColor);
            g2.setPaint(pointersAndNumbersColor);
            paintNumbers();
            paintDots();
            paintPointers();
        }
    }

    @Override
    public void paintClock(int width, int height, int seconds, Graphics2D g2) {
        new Painter(width, height, seconds, g2).paintClock();
    }
}

Freepascal

Este reloj muestra la hora, fecha y fase de la luna. Sin embargo, a diferencia de los relojes mecánicos que tienen una pequeña ventana para mostrar la fase de la luna, en mi reloj se usa toda la cara para mostrarla. Hoy 14 de febrero es luna llena. Puede ver el resultado esperado en los próximos días a continuación.

uses graph,sysutils;

const hemisphere=-1; {-1=north,1=south}
MonthStr : array[1..12] of string [3] =
('Jan','Feb','Mar','Apr','May','Jun','Jul','Aug','Sep ','Oct','Nov','Dec');

var yy,dd,mm,hh,mn,ss,ms: word;
var s: string; d2fullmoon,hour,min:real; sec:word;

var gd, gm, n : integer;
var right, left, centre: word;

begin

  gd := D4bit;
  gm := m640x480;
  initgraph(gd,gm,'');
  setbkcolor(blue);cleardevice; setbkcolor(black);
  setlinestyle(0,0,3);
  settextjustify(centertext,centertext);
  settextstyle(defaultfont,horizdir,2);

  while true do begin

    {output to console}

    DecodeDate(Date,YY,MM,DD);
    Writeln (Format ('Today is %d/%d/%d',[dd,mm,yy]));

    DecodeTime(Time,HH,Mn,SS,MS);
    Writeln (format('The time is %d:%d:%d.%d',[hh,mm,ss,ms]));

    d2fullmoon:=yy*(365*3+366)/4+mm*365/12+dd-2014*(365*3+366)/4-2*365/12-14;
    writeln ('days since full moon 14 feb 2014 ',d2fullmoon);

    if ss mod 15=0 then begin {Refresh display every 15 sec. Only the second hand is refreshed every sec.}

      {Draw circle and 180deg pie in yellow/black. Draw yellow or black ellipse on top. Add boxes for date}

      if sin(d2fullmoon/29.530588853*2*pi)*hemisphere>0 then right:=yellow else right:=black;
      left:=yellow-right;

      setcolor(right);setfillstyle(solidfill,right);
      fillellipse(320,240,200,200);

      setfillstyle(solidfill,left);setcolor(left);
      pieslice(320,240,90,270,200);

      if cos(d2fullmoon/29.530588853*2*pi)>0 then centre:=yellow else centre:=black;
      setcolor(centre); setfillstyle(solidfill,centre);
      fillellipse(320,240,abs(trunc(200*cos(d2fullmoon/29.530588853*2*pi))),200);

      setcolor (blue); setfillstyle(solidfill,blue);
      bar (270,135,370,165); bar (270,345,370,315);

      {fill in numbers}

      for n:=1 to 12 do begin
        setcolor(blue); setfillstyle(solidfill,blue);
        fillellipse(319+trunc(170*sin(n*pi/6)),240-trunc(170*cos(n*pi/6)),15,15);
        fillellipse(320+trunc(170*sin(n*pi/6)),240-trunc(170*cos(n*pi/6)),15,15);

        moveto(322+trunc(170*sin(n*pi/6)),240-trunc(170*cos(n*pi/6)));
        setcolor(white);
        str(n,s);outtext(s);
      end;

      {fill in date}

      str(yy,s);
      moveto(320,330);outtext(s);
      str(dd,s);
      moveto(320,150);outtext(s+monthstr[mm]);

      {draw hour and minute hands}

      hour:=hh+mn/60; min:=mn+ss/60;
      setcolor(cyan) ;setfillstyle(solidfill,cyan);
      moveto(320,240);
      linerel(trunc(140*sin(min*pi/30)),trunc(-140*cos(min*pi/30)));
      fillellipse(320+trunc(140*sin(min*pi/30)),240+trunc(-140*cos(min*pi/30)),7,7);
      moveto(320,240);
      linerel(trunc(100*sin(hour*pi/6)),trunc(-100*cos(hour*pi/6)));
      fillellipse(320+trunc(100*sin(hour*pi/6)),240+trunc(-100*cos(hour*pi/6)),7,7);
      fillellipse(320,240,10,10);

    end;

    {draw second hand in XOR mode, sleep for a second, then repeat to undraw}

    sec:=ss;
    setwritemode(xorput); setcolor(white);
    moveto(320+trunc(12*sin(sec*pi/30)),240+trunc(-12*cos(sec*pi/30)));
    linerel(trunc(150*sin(sec*pi/30)),trunc(-150*cos(sec*pi/30)));

    Sleep(1000);

    moveto(320+trunc(12*sin(sec*pi/30)),240+trunc(-12*cos(sec*pi/30)));
    linerel(trunc(150*sin(sec*pi/30)),trunc(-150*cos(sec*pi/30)));
    setwritemode(copyput);

  end;
  closegraph;
end.

Una simple que mi amigo escribió en TI 84 BASIC:

StoreGDB 0
CoordOff
GridOff
AxesOff
LabelOff
ExprOff
ClrDraw
62->Ymax
0->Ymin
94->Xmax
0->Xmin
Func
FnOff 0,1,2,3,4,5,6,7,8,9
PlotsOff 1,2,3
Full
Xmax/2->Xmax
Ymax/2->Ymax
~Xmax->Xmin
~Ymax->Ymin
Degree

15->H
18->M
20->S

Circle(36,~22,7)
Circle(0,0,30)
For(X,1,12)
Text(28-int(cos(X*30)*25),46+int(sin(30*X)*25),X)
End

{0,0,0}->|LANG

While getKey=0
getTime->|LTIME
getDate->|LDATE

Text(0,0,"12 HR")
Text(50,0,"24 HR")
If |LTIME(1)>12:Then
Text(6,7,(|LTIME(1)-12))
Else
Text(6,7,|LTIME(1))
End

If |LTIME(1)<=9
Then
Text(56,4,"O")
Text(56,8,|LTIME(1))
Else
Text(56,4,|LTIME(1))
End

Text(29,4,|LTIME(2))


If |LDATE(2)=1
Text(0,70,"JAN")

If |LDATE(2)=2
Text(0,70,"FEB")

If |LDATE(2)=3
Text(0,70,"MAR")

If |LDATE(2)=4
Text(0,70,"APR")

If |LDATE(2)=5
Text(0,70,"MAY")

If |LDATE(2)=6
Text(0,70,"JUN")

If |LDATE(2)=7
Text(0,70,"JUL")

If |LDATE(2)=8
Text(0,70,"AUG")

If |LDATE(2)=9
Text(0,70,"SEP")

If |LDATE(2)=10
Text(0,70,"OCT")

If |LDATE(2)=11
Text(0,70,"NOV")

If |LDATE(2)=12
Text(0,70,"DEC"
Text(2,81,",")
Text(0,85,|LDATE(3))
Text(8,75,|LDATE(1))


If |LTIME(1)>=12
Then
Text(50,80,"PM")
Else
Text(50,80,"AM")
End

If |LTIME(3)!=|LANG(3)/6
Line(0,0,sin(|LANG(3))*S,cos(|LANG(3))*S,0)

If |LTIME(2)!=|LANG(2)/6
Then
Line(0,0,sin(|LANG(2))*M,cos(|LANG(2))*M,0)
Line(0,0,sin(|LANG(1))*H,cos(|LANG(1))*H,0)
End

|LTIME(1)*30+|LTIME(2)/2->|LANG(1)
|LTIME(2)*6->|LANG(2)
|LTIME(3)*6->|LANG(3)

Line(0,0,sin(|LANG(1))*H,cos(|LANG(1))*H
Line(0,0,sin(|LANG(2))*M,cos(|LANG(2))*M
Line(0,0,sin(|LANG(3))*S,cos(|LANG(3))*S
End

Mathematica

Un reloj simple y funcional que muestra la hora local:

Dynamic@Refresh[ClockGauge@AbsoluteTime[], UpdateInterval -> 1]

Opciones estandar

Reloj calibre dibujado a mano

Hay alternativas al medidor de reloj incorporado. Aqui hay uno.

Se ha implementado un barrido continuo para las manecillas de hora y minutos. Se actualizan junto con la segunda mano.

u[i_, k_] := {Sin[2 \[Pi] i/k], Cos[2 \[Pi] i/k]};
Dynamic[{f = Date[], Clock[{1, 1}, 1]}]
Graphics[Dynamic@{Circle[{0, 0}, 1.175], Circle[{0, 0}, 1.2],

   (* tick marks at minutes *)
   Table[Text[".", u[i, 60]], {i, 60}],  

   (* hour labels *)
   Table[Text[i, u[i, 12]], {i, 12}],  

   (* hour hand *)
   {Darker@Red, Arrowheads[.12], Thickness[.0175], Arrow[{{0, 0}, .6 u[f[[4]]+f[[5]]/60, 12]}]},

   (*minute hand *)
   {Blue, Arrowheads[.08], Thickness[.0085], Arrow[{{0, 0}, .85 u[f[[5]]+f[[6]]/60, 60]}]},

   (*second hand *)
   {Thickness[.005], Arrow[{{0, 0}, .9 u[f[[6]], 60]}]}}, 
   BaseStyle -> 25]

Postdata: originalmente escrita para ayudar a mis hijos a aprender a decir la hora. La página 1 muestra la hora actual, las páginas 2 a 4 son páginas para estudiantes. Las páginas para los estudiantes usan randpara hacer tiempos aleatorios, por lo que son diferentes cada vez que lo procesas. Use Ghostscript para hacer una versión en PDF si desea mostrar la hora actual. Tamaño para papel A4.

%!PS-Adobe-3.0
%%Creator: Toby Thurston
%%Title: (Pages of pedagogical clocks)
%%CreationDate: (2014-02-14)
%%BoundingBox: 12 12 583 828 
%%Pages: 1
%%EndComments
<< /PageSize [595 842] >> setpagedevice
%%BeginSetup
/clock {
  /mins exch def
  /hour exch def
  /r exch def % radius
  /cr r 100 div def
  % draw the minute marks
  12 { .5 setlinewidth 4 { 6 rotate r 0 moveto r 20 div 0 rlineto stroke } repeat
        2 setlinewidth     6 rotate r 0 moveto r 20 div 0 rlineto stroke } repeat  
  % numbers           
  /fontsize r 0.14 mul def
  /Helvetica findfont fontsize scalefont setfont
  /s 2 string def 
  /rr r 0.9 mul def
  1 1 12 { /n exch def /theta 90 30 n mul sub def
  /st n s cvs def st stringwidth pop /dx exch 2 div neg def
  rr theta cos mul rr theta sin mul moveto dx fontsize 3 div neg rmoveto st show
  } for

  % draw hands (unless hour is negative)
  -1 hour lt {
      gsave % hour hand first
      90 60 hour mul mins add 2 div sub rotate
      newpath
      0 2 moveto
      15 cr mul  3 cr mul 33 cr mul   0 cr mul 50 cr mul  3 cr mul curveto 
      55 cr mul 15 cr mul 60 cr mul   0 cr mul 76 cr mul  0 cr mul curveto
      60 cr mul  0 cr mul 55 cr mul -15 cr mul 50 cr mul -3 cr mul curveto 
      33 cr mul  0 cr mul 15 cr mul  -3 cr mul  0 cr mul -2 cr mul curveto
      closepath 0 0 .677 setrgbcolor fill
      grestore
      gsave % minute hand on top
      90 6 mins mul sub rotate
      newpath
      0 2 moveto
      15 cr mul 3 cr mul 33 cr mul 0         50 cr mul  1 cr mul curveto 
      65 cr mul 3 cr mul 83 cr mul 0         97 cr mul  0        curveto
      83 cr mul 0        65 cr mul -3 cr mul 50 cr mul -1 cr mul curveto 
      33 cr mul 0        15 cr mul -3 cr mul 0         -2 cr mul curveto
      closepath .635 0 0 setrgbcolor fill
      grestore
  } if 

  % finally do central dot (to cover starts of hands) and outer band      
  .5 setlinewidth
  0 0 moveto 0 0 r 20 div   0 360 arc fill
             0 0 r 1.07 mul 0 360 arc stroke

} def
%%EndSetup
%%Page: 1 1 
%%BeginPageSetup
/pgsave save def
%%EndPageSetup
  297 480 translate
  120 

  (%Calendar%) /IODevice resourcestatus {
   pop pop (%Calendar%) currentdevparams
   dup /Running get { dup /Hour get exch /Minute get }{ 0 0 } ifelse } { -1 -1 } ifelse

  clock
pgsave restore
showpage
%%Page: 2 2
%%BeginPageSetup
/pgsave save def
%%EndPageSetup
  75 -55 translate
  4 {
     5 { 0 165 translate % a page of clocks for learners
         50 rand 12 mod rand 60 mod clock 
         % line underneath           
         gsave [1 3] 0 setdash 50 neg dup 1.8 mul moveto 50 2 mul 0 rlineto stroke grestore
     } repeat
     146 5 165 mul neg translate
  } repeat
pgsave restore
showpage
%%Page: 3 3
%%BeginPageSetup
/pgsave save def
%%EndPageSetup
  75 -55 translate
  4 {
     5 { 0 165 translate    % whole multiple of five minutes only
         50 rand 12 mod rand 12 mod 5 mul clock 
         gsave [1 3] 0 setdash 50 neg dup 1.8 mul moveto 50 2 mul 0 rlineto stroke grestore
     } repeat
     146 5 165 mul neg translate
  } repeat
pgsave restore
showpage
%%Page: 4 4
%%BeginPageSetup
/pgsave save def
%%EndPageSetup
  75 -55 translate
  4 {
     5 { 0 165 translate    % quarter hours only
         50 rand 12 mod rand 4 mod 15 mul clock 
         gsave [1 3] 0 setdash 50 neg dup 1.8 mul moveto 50 2 mul 0 rlineto stroke grestore
     } repeat
     146 5 165 mul neg translate
  } repeat
pgsave restore
showpage
%%EOF

Demostración: http://jsfiddle.net/kelunik/Vuuq8/7/embedded/result/

HTML

<div id="clock">
    <div id="h"></div>
    <div id="m"></div>
    <div id="s"></div>
</div>

CSS

html, body {
    margin: 0;
    padding: 0;
    text-align: center;
}
#clock {
    width: 100vmin;
    height: 100vmin;
    border-radius: 50%;
    border: 1vmin solid #333;
    position: relative;
    box-shadow: 0 0 5vmin rgba(0, 0, 0, .3);
    box-sizing: border-box;
    margin: 0 auto;
    transform: scale(.8);
}
#h, #m, #s {
    top: 50vmin;
    left: 50vmin;
    position: absolute;
}
#h:before, #m:before, #s:before {
    content:"";
    position: absolute;
    left: 100%;
    height: 0;
    box-shadow: 0 0 2vmin rgba(0,0,0,.2);
    border-radius: 50%;
}
#h:before {
    width: 25vmin;
}
#m:before {
    width: 35vmin;
}
#s:before {
    width: 45vmin;
}
#h:before {
    background: black;
    height: 4vmin;
    transform: translateY(-2vmin);
}
#m:before {
    background: black;
    height: 2vmin;
    transform: translateY(-1vmin);
}
#s:before {
    background: red;
    height: 2vmin;
    transform: translateY(-1vmin);
}

Javascript

var h = document.getElementById('h');
var m = document.getElementById('m');
var s = document.getElementById('s');

setInterval(function () {
    refreshClock();
}, 1000);

function refreshClock() {
    var time = new Date;

    deg = time.getSeconds() * 6 - 90;
    s.style.webkitTransform = s.style.MozTransform = s.style.msTransform = s.style.transform = "rotate(" + deg + "deg)";

    deg = time.getMinutes() * 6 - 90;
    m.style.webkitTransform = m.style.MozTransform = m.style.msTransform = m.style.transform = "rotate(" + deg + "deg)";

    deg = time.getHours() % 12 * 30 - 90;
    h.style.webkitTransform = h.style.MozTransform = h.style.msTransform = h.style.transform = "rotate(" + deg + "deg)";
}

window.onload = function () {
    refreshClock();
};

Aquí hay uno en proceso:

int ax,ay,bx,by,cx,cy,dx,dy,last;
int q = 1;
float c = 0;
float h = 0;
float m = 0;

void setup() {
  size(displayWidth, displayHeight);
  background(0);
}

boolean sketchFullScreen() {
  return true;
}

void draw() {
  colorMode(HSB);
  fill(c,255,255,4);
  noStroke();
  rect(0,0,width,height);

  c+=0.4;
  if (c > 255) c = 0;

  colorMode(RGB);

  ax = int(random(displayWidth));
  ay = int(random(displayHeight));
  bx = ax + int(random(-50,50));
  by = ay + int(random(0,50));

  strokeWeight(1);

  if (random(0,1)>0.5) {
    fill(random(255),random(255),random(255));
    stroke(random(255),random(255),random(255));
  }
  else {
    noFill();
    stroke(random(255),random(255),random(255));
  }

  switch(int(random(6))) {
    case 0: // line
    line(ax,ay,bx,by);

    break;
    case 1: // bezier (arc)
    cx = int(random(ax-20,bx+20));
    cy = int(random(ay-20,by+20));
    dx = int(random(ax-20,bx+20));
    dy = int(random(ay-20,by+20));
    bezier(ax,ay,cx,cy,dx,dy,bx,by);

    break;
    case 2: // box
    quad(ax,ay,ax,by,bx,by,bx,ay);

    break;
    case 3: // ellipse
    ellipse(ax,ay,random(15,50),random(15,50));

    break;
    case 4: // triangle
    cx = int(random(ax-20,bx+20));
    cy = int(random(ay-20,by+20));
    dx = int(random(ax-20,bx+20));
    dy = int(random(ay-20,by+20));
    triangle(cx,cy,bx,by,dx,dy);

    break;
    case 5: // arc
    arc(ax,ay,random(15,50),random(15,50),random(2)*PI,random(2)*PI);

    break;  
  }

  float s = map(second(), 0, 60, 0, TWO_PI) - HALF_PI;
  float m = map(minute() + norm(second(), 0, 60), 0, 60, 0, TWO_PI) - HALF_PI; 
  float h = map(hour() + norm(minute(), 0, 60), 0, 24, 0, TWO_PI * 2) - HALF_PI;

  cx = width/2;
  cy = height/2;

  // Draw the hands of the clock
  stroke(255);
  strokeWeight(1);
  line(cx, cy, cx + cos(s) * 500, cy + sin(s) * 500);
  strokeWeight(2);
  line(cx, cy, cx + cos(m) * 400, cy + sin(m) * 400);
  strokeWeight(4);
  line(cx, cy, cx + cos(h) * 300, cy + sin(h) * 300);

}

void mouseMoved() {
  exit();
}
void keyPressed() {
  background(0);
}

HTML + CSS3 + JS

He usado principalmente CSS para este reloj. Hay un componente JS que actualiza los atributos en el reloj div con la hora actual, pero fuera de eso, todo el reloj es CSS.

demostración en vivo aquí: http://jsbin.com/nuvag/3

código fuente aquí: http://jsbin.com/nuvag/3/edit

GNUPLOT

unset clip points
set clip one
unset clip two
set bar 1.000000
unset border
set xdata
set ydata
set zdata
set x2data
set y2data
set timefmt x "%d/%m/%y,%H:%M"
set timefmt y "%d/%m/%y,%H:%M"
set timefmt z "%d/%m/%y,%H:%M"
set timefmt x2 "%d/%m/%y,%H:%M"
set timefmt y2 "%d/%m/%y,%H:%M"
set timefmt cb "%d/%m/%y,%H:%M"
set boxwidth
set style fill  empty border
set dummy t,y
set format x "% g"
set format y "% g"
set format x2 "% g"
set format y2 "% g"
set format z "% g"
set format cb "% g"
set angles radians
unset grid
set key title ""
unset key
unset label
unset arrow
unset style line
unset style arrow
set style histogram clustered gap 2 title  offset 0, 0, 0
unset logscale
set offsets 0, 0, 0, 0
set pointsize 1
set encoding default
unset polar
set parametric
unset decimalsign
set view 60, 30, 1, 1
set samples 100, 100
set isosamples 10, 10
set surface
unset contour
set clabel '%8.3g'
set mapping cartesian
set datafile separator whitespace
unset hidden3d
set cntrparam order 4
set cntrparam linear
set cntrparam levels auto 5
set cntrparam points 5
set size ratio 0 1,1
set origin 0,0
set style data points
set style function lines
set xzeroaxis linetype -2 linewidth 1.000
set yzeroaxis linetype -2 linewidth 1.000
set zzeroaxis linetype -2 linewidth 1.000
set x2zeroaxis linetype -2 linewidth 1.000
set y2zeroaxis linetype -2 linewidth 1.000
set ticslevel 0.5
set mxtics default
set mytics default
set mztics default
set mx2tics default
set my2tics default
set mcbtics default
set noxtics
set noytics
set noztics
set nox2tics
set noy2tics
set nocbtics
set title ""  offset character 0, 0, 0 font "" norotate
set timestamp bottom 
set timestamp ""  offset character 0, 0, 0 font "" norotate
set rrange [ * : * ] noreverse nowriteback  # (currently [0.000000:10.0000] )
set trange [ * : * ] noreverse nowriteback  # (currently [-5.00000:5.00000] )
set urange [ * : * ] noreverse nowriteback  # (currently [-5.00000:5.00000] )
set vrange [ * : * ] noreverse nowriteback  # (currently [-5.00000:5.00000] )
set xlabel ""  offset character 0, 0, 0 font "" textcolor lt -1 norotate
set x2label ""  offset character 0, 0, 0 font "" textcolor lt -1 norotate
set xrange [ * : * ] noreverse nowriteback  # (currently [-10.0000:10.0000] )
set x2range [ * : * ] noreverse nowriteback  # (currently [-10.0000:10.0000] )
set ylabel ""  offset character 0, 0, 0 font "" textcolor lt -1 rotate by 90
set y2label ""  offset character 0, 0, 0 font "" textcolor lt -1 rotate by 90
set yrange [ * : * ] noreverse nowriteback  # (currently [-10.0000:10.0000] )
set y2range [ * : * ] noreverse nowriteback  # (currently [-10.0000:10.0000] )
set zlabel ""  offset character 0, 0, 0 font "" textcolor lt -1 norotate
set zrange [ * : * ] noreverse nowriteback  # (currently [-10.0000:10.0000] )
set cblabel ""  offset character 0, 0, 0 font "" textcolor lt -1 norotate
set cbrange [ * : * ] noreverse nowriteback  # (currently [-10.0000:10.0000] )
set zero 1e-008
set lmargin -1
set bmargin -1
set rmargin -1
set tmargin -1
set locale "C"
set pm3d explicit at s
set pm3d scansautomatic
set pm3d interpolate 1,1 flush begin noftriangles nohidden3d corners2color mean
set palette positive nops_allcF maxcolors 0 gamma 1.5 color model RGB 
set palette rgbformulae 7, 5, 15
set colorbox default
set colorbox vertical origin screen 0.9, 0.2, 0 size screen 0.05, 0.6, 0 bdefault
set loadpath 
set fontpath 
set fit noerrorvariables
set arrow from 0,0 to sin(`date +%M`*3.1416/30),cos(`date +%M`*3.1416/30) 
set arrow from 0,0 to sin((`date +%H`%12)*3.1416/6)/2,cos((`date +%H`%12)*3.1416/6)/2
plot sin(t),cos(t)
reread

Código MATLAB simple, escrito principalmente para apreciar el marcado de 24 horas en el trabajo.

mientras que 1 runWatch () pausa (0.6); fin

% 20160829 :: [email protected]
function runWatch()
cla;

dialHours  = 24;   % You can set it to 12 but why?
midnightUp = true; % defines position of midnight

col.hr = 'k'; 
col.mn = 'b'; 
col.sc = 'r'; 

logoStr = ['Perpetuum'];

xo = 0; yo = 0; 
RH  = 0.7;   RM  = 0.95; Rb = 0.5*(RH+RM);
RarrH = RH; RarrM = Rb; RarrS = RM;

fig_handle = findobj(allchild(0), 'flat', 'type', 'figure');

if isempty(fig_handle), set(gcf,'Position',[100 100 500 500]); end
hoursPhase = 3*pi/2; if midnightUp == true, hoursPhase = pi/2; end

hold on;
circle(xo, yo, RH,col.hr); 
circle(xo, yo, RM,col.mn);% ,'b');
circle(xo, yo, (RH+RM)/2,col.mn); %0.5*[1 1 1]);

text (xo - 2.5*RH/8+0.003, yo - RH/2-0.003, logoStr,'Color',0.5*[1 1 1],'FontAngle','italic');
text (xo - 2.5*RH/8,       yo - RH/2,       logoStr, 'FontAngle','italic')
axis equal; axis off;

% Hour dial
dh = pi/dialHours; h = 0:-dh:-pi+dh;
xH = RH*cos(2*h+hoursPhase); yH = RH*sin(2*h+hoursPhase);
xHb= Rb*cos(2*h+hoursPhase); yHb= Rb*sin(2*h+hoursPhase);
for n=1:length(xH)
    plot([xH(n),xHb(n)],[yH(n),yHb(n)],col.hr);
end
% Minute dial
dm = pi/60; m = 0:-dm:-pi+dm;
xM = RM*cos(2*m+pi/2); yM = RM*sin(2*m+pi/2);
xMb= Rb*cos(2*m+pi/2); yMb= Rb*sin(2*m+pi/2);
for n=1:length(xM)
    plot([xM(n),xMb(n)],[yM(n),yMb(n)],'Color',col.mn);
end

% Labels Hour
dhl = pi/dialHours; hl = 0:-dhl:-pi+dhl;  ratioH = -dialHours/180;
xHl= 0.5*(Rb+RH)*cos(2*hl+hoursPhase); 
yHl= 0.5*(Rb+RH)*sin(2*hl+hoursPhase);
for n=1:length(xHl)
    octagon (xHl(n), yHl(n), 0.3*(RH-Rb), 'w');
    text (xHl(n),yHl(n), num2str( rad2deg(hl(n)*ratioH) ),...
        'HorizontalAlignment','center','Rotation',rad2deg(2*hl(n)+hoursPhase-pi/2),...
        'FontWeight','b','FontSize',13,'Color',col.hr);    

end

% Labels Minute
dml = pi/12; ml=0:-dml:-pi+dml;  ratioM = -60/180; 
xMl= 0.5*(Rb+RM)*cos(2*ml+pi/2); yMl= 0.5*(Rb+RM)*sin(2*ml+pi/2);
for n=1:length(xMl)    
    octagon (xMl(n), yMl(n), 0.3*(RM-Rb), 'w');
    text (xMl(n),yMl(n), num2str( rad2deg(ml(n)*ratioM) ),...
        'HorizontalAlignment','center','Rotation',rad2deg(2*ml(n)), ...
        'FontWeight','b','Color',col.mn);
end

octagon (xo, yo-0.5*(RH+Rb), 0.04, col.hr);
octagon (xo, yo-0.5*(RH+Rb), 0.03, col.mn);

[now_year, now_month, now_day, ...
    now_hour, now_minute, now_second] = datevec(now);

% Arrows
K = -2*pi/dialHours; D = hoursPhase;
now_hour = now_hour + now_minute/60;
xarrowh = RarrH*cos(K*now_hour+D);
yarrowh = RarrH*sin(K*now_hour+D);
plot([0,xarrowh],[0,yarrowh],'Color',col.hr,'LineWidth',6); 
plot([0,xarrowh],[0,yarrowh],'Color',0.5*[1 1 1],'LineWidth',3); 
arrowhead (xarrowh,yarrowh,0.02,atan2(yarrowh,xarrowh),col.hr);

K = -2*pi/60; D = pi/2;
now_minute = now_minute + now_second/60;
xarrowm  = RarrH*cos(K*now_minute+D);
yarrowm  = RarrH*sin(K*now_minute+D);
xarrowml = RarrM*cos(K*now_minute+D);
yarrowml = RarrM*sin(K*now_minute+D);
plot([0,xarrowml],[0,yarrowml],'Color','k', 'LineWidth',4);
plot([0,xarrowml],[0,yarrowml],'Color',col.mn, 'LineWidth',2);
arrowhead (xarrowml,yarrowml,0.02,atan2(yarrowml,xarrowml),col.mn);

K = -2*pi/60; D = pi/2;
now_second = round(now_second);
xarrows = RarrH*cos(K*now_second+D);
yarrows = RarrH*sin(K*now_second+D);
xarrowsl = RarrS*cos(K*now_second+D);
yarrowsl = RarrS*sin(K*now_second+D);
plot([0,xarrowsl],[0,yarrowsl],'Color',col.sc,'LineWidth',1);
arrowhead (xarrowsl,yarrowsl,0.02,atan2(yarrows,xarrows)-pi,col.sc);

text(0.7,1,...
    [pad_with(floor(now_hour),2,'0'), ':', pad_with(floor(now_minute),2,'0'), ':', pad_with(now_second,2,'0')],...
    'FontSize',8,'FontWeight','n','BackgroundColor','w');

% Dial center
plot(xo, yo, 'ko','MarkerSize',10,'MarkerFaceColor','k');
plot(xo, yo, 'ko','MarkerSize',8,'MarkerFaceColor',0.5*[0 1 1]);

end

function [XX,YY] = circle(varargin)
%x and y are the coordinates of the center of the circle
%r is the radius of the circle
%0.01 is the angle step, bigger values will draw the circle faster but
%you might notice imperfections (not very smooth)

col = 'k';
x = varargin{1};
y = varargin{2};
r = varargin{3};
if length(varargin) > 3
    col = varargin{4};
end

ang=0:0.01:2*pi; 
xp=r*cos(ang);
yp=r*sin(ang);
XX = x+xp; YY = y+yp;
plot(XX,YY,'Color',col);
end

function octagon (xo, yo, R, col)

t = (1/16:1/8:1)'*2*pi;
x = R*cos(t);
y = R*sin(t);
fill(xo+x, yo+y,col,'EdgeColor','none')
end

% 20151001 :: [email protected]
% Use :: str = pad_with (num, L, pad)
% function creates a string of L length
% padded with leading 'pad' symbol
% e.g., num=23,    L=4, pad='.' --> '..23';
% e.g., num='23W', L=4, pad=' ' --> ' 23W';
% 
function str = pad_with (num, L, pad)

if ~ischar(num)
    num = num2str(num);
end
strL = length(num);
if L<strL, L = strL; end;
for n=1:L-strL, str(n) = pad; end;
c = 0;
for n=L-strL+1:L
    c = c+1; str(n) = num(c);
end
end

function [x, y] = arrowhead (xo, yo, height, alpha, col)

x(1) = xo + height*sin(alpha);
y(1) = yo - height*cos(alpha);

x(2) = xo - height*sin(alpha);
y(2) = yo + height*cos(alpha);

x(3) = xo + 2*height*cos(alpha);
y(3) = yo + 2*height*sin(alpha);

fill(x, y,col,'EdgeColor','none')
end

Python (con matplotlib)

Aquí hay un reloj muy básico que se ejecuta en el escritorio. Cambie intervalde la segunda a la última línea para 1obtener un movimiento continuo en lugar de una marca por segundo.

import numpy as np
import matplotlib.pyplot as plt
import matplotlib.animation as animation
import datetime

plt.rcParams['toolbar'] = 'None' 
fig = plt.figure(figsize=(4,4),facecolor='w')
ax = plt.subplot(111, polar=True)
plt.axes().get_yaxis().set_visible(False)

#12 labels, clockwise
marks = np.linspace(360./12,360,12, endpoint=True)
ax.set_thetagrids(marks,map(lambda m: int(m/30),marks),frac=.85,size='x-large')
ax.set_theta_direction(-1)
ax.set_theta_offset(np.pi/2)
ax.grid(None)

#hands
wids  = [.2,.03,.01]
lens  = [.75,.9,1]
clrs = plt.cm.winter(np.linspace(0, 1, 3))
factor = [12,60,60,1]

#convert time to radians
def timedata():
    x =  str(datetime.datetime.now().time())
    fig.canvas.set_window_title(x[:8])
    data = map(lambda n: float(n), x.split(':'))+[0]
    for i in range(3):
        data[i]=2*np.pi*(data[i]/factor[i]+data[i+1]/factor[i+1]/factor[i])
        data[i]-=(wids[i]/2)
    return data[:3]

#create hands
bars = ax.bar(timedata(), lens, width=wids, bottom=0.0, color=clrs, linewidth=0)
map(lambda b: b.set_alpha(0.5), bars)

#tick
def animate(i):
    map(lambda bt: bt[0].set_x(bt[1]), zip(bars,timedata()))
    return bars

ani = animation.FuncAnimation(fig, animate, np.arange(1, 200), interval=1000)
plt.show()