Crie um relógio analógico

Objetivo: criar um relógio analógico funcional usando qualquer linguagem de programação.

Requisitos:

• Seu relógio deve apresentar pelo menos os ponteiros de hora e minuto.
• O relógio produzido pode estar na forma de uma imagem, uma animação ou arte ASCII.
• Espera-se que o relógio mostre a hora local.

Opcional:

• Você pode fazer com que o relógio mostre o ponteiro dos segundos, além dos minutos e horas.
• Você também pode configurar o fuso horário, se desejar.
• Você é livre para escolher se pode negligenciar ou lidar com problemas relacionados a segundos bissextos.
• Você pode pensar no que acontece ao seu programa se o usuário ajustar o relógio do sistema ou se ocorrer uma alteração na luz do dia.

Como este é um concurso de popularidade , seja criativo e desenhe alguns relógios bonitos e bonitos para merecer os votos positivos. A resposta mais votada vence , com a exceção de que não aceitarei minha própria resposta.

Por fim, é recomendável (mas não obrigatório) que você publique pelo menos uma captura de tela (ou saída de texto no caso de arte ASCII) do seu relógio em sua resposta. Dessa forma, as pessoas não precisarão compilar e executá-lo para ver o que é.

Esta pergunta pretende reviver uma pergunta excluída.

Observe que não é uma duplicata dessa outra pergunta . Essa pergunta era um código de golfe pedindo arte ASCII. Este não é restrito à arte ASCII e , em vez disso, é um concurso de popularidade ; portanto, espera-se que as respostas sejam muito diferentes.

SVG + Javascript

▶▶▶ demonstração ao vivo aqui ◀◀◀

Isso usa as funções de animação integradas do SVG para girar as mãos, com um pouco de Javascript adicional para buscar a hora local e definir as posições iniciais das mãos. Funciona bem no Chrome e no Safari e deve ser compatível com os navegadores mais modernos, pois não usa efeitos 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

Fiz um relógio que muda de cor de acordo com a hora do dia, mostrando a hora local. À medida que o tempo passa, ele muda lentamente de cor, usando cores mais brilhantes de dia e cores mais escuras à noite.

A janela é redimensionável e o relógio é redimensionado automaticamente para o tamanho que você escolher.

Além disso, se o usuário ajustar o relógio do sistema ou se ocorrer uma alteração no horário de verão, o relógio refletirá isso automaticamente.

Existem dois formulários para executá-lo:

1. Executando o ClockDemoarquivo, ie java clock.ClockDemo. Isso abrirá uma janela e você verá o relógio lá.

2. Executando o ClockSavearquivo, ie java clock.ClockSave filename width height [HH:mm:ss]. Isso apenas salvará o relógio em um arquivo PNG com o nome, a largura e a altura do arquivo. O relógio será desenhado com o tempo determinado, ou se isso for omitido, com o tempo atual. Por exemplo, se você executá-lo, java clock.ClockSave clock.png 600 500 12:38:24ele salvará o relógio em uma imagem de 600x500 em um clock.pngarquivo e o relógio será exibido 12:38:24. Use horas no intervalo de 00 a 23.

Screenshots

Aqui estão algumas capturas de tela e arquivos gerados:

00:36:50:

02:38:51 AM:

06:42:13 AM:

11:15:28:

05:02:37 PM:

07:11:30:

09:29:34 PM:

Código fonte

Separei a fonte em cinco arquivos diferentes em um pacote chamado clock.

Também disponível no 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 relógio exibe a hora, data e fase da lua. No entanto, diferentemente dos relógios mecânicos que têm uma pequena janela para exibir a fase da lua, no meu relógio a face inteira é usada para exibi-la. Hoje 14 de fevereiro é lua cheia. Você pode ver a produção esperada nos próximos dias abaixo.

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.

Um simples que meu amigo escreveu na 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

Um relógio simples e funcional que exibe a hora local:

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

Opções padrão

Medidor de relógio desenhado à mão

Existem alternativas para o medidor de relógio interno. Aqui está um.

A varredura contínua foi implementada para os ponteiros de horas e minutos. Eles atualizam junto com a segunda mão.

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]

Postscript - originalmente escrito para ajudar meus filhos a aprender a contar as horas. A página 1 mostra a hora atual, as páginas 2 a 4 são páginas para os alunos. As páginas para os alunos usam randpara criar horários aleatórios; portanto, eles são diferentes sempre que você o processa. Use o Ghostscript para criar uma versão em PDF se você quiser mostrar a hora atual. Tamanho 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

Demonstração: 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();
};

Aqui está um em processamento:

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

Eu usei principalmente CSS para este relógio. Há um componente JS que atualiza os atributos na div do relógio com a hora atual, mas fora disso, o relógio inteiro é CSS.

demonstração ao vivo aqui: http://jsbin.com/nuvag/3

código fonte aqui: 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 simples, escrito principalmente para apreciar a discagem de 24 horas no trabalho.

enquanto 1 runWatch () pausa (0,6); fim

% 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 (com matplotlib)

Aqui está um relógio muito básico que roda na área de trabalho. Altere intervalda 2ª para a última linha para 1para movimento contínuo em vez de um tique 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()