/*
 * Alec Jacobson
 * 
 */
import java.awt.*;
import java.util.Date;

/**
 * Though the source of this code is open. The design of this clock very much
 * is not. You may not reproduce this design in any form.
 * @author Alec Jacobson alecjacobson@gmail.com
 */
public class GeometricClock extends BufferedApplet{

  int w, h;//bounds of applet
  float alpha = 0.3f;
  boolean initialized = false;
  Color background_color = Color.WHITE;
  Color clock_color = Color.RED;
  Color hour_color = Color.GREEN;
  Color minute_color = Color.BLUE;
  
  public void render(Graphics g) {
    if(w!=bounds().width||h!=bounds().height){
      w = bounds().width;
      h = bounds().height;
    }

    // SET CLOCK SIZE
    int r = (int)((1.0/Math.sqrt(2))*Math.min(w,h)/2);
    int cx = w/2; 
    int cy = h/2; 

    // GET DATE
    Date date = new Date();
    double seconds = (double)date.getSeconds();
    double minutes = (double)date.getMinutes() + seconds/60.0;
    double hours = (double)date.getHours() + minutes/60.0;

    // MINUTES
    double r_minute = r;
    double theta_minute = 2*Math.PI*(minutes%60.0)/60.0;
    double x_minute = r_minute*Math.sin(theta_minute);
    double y_minute = -r_minute*Math.cos(theta_minute);
    int[] minute_xs = {
      (int)(cx+r_minute*Math.sin(theta_minute+Math.PI/2)),
      (int)(cx+r_minute*Math.sin(theta_minute-Math.PI/2)),
      (int)(cx+r_minute*Math.sin(theta_minute-Math.PI/2)+x_minute),
      (int)(cx+r_minute*Math.sin(theta_minute+Math.PI/2)+x_minute)};
    int[] minute_ys = {
      (int)(cy-r_minute*Math.cos(theta_minute+Math.PI/2)),
      (int)(cy-r_minute*Math.cos(theta_minute-Math.PI/2)),
      (int)(cy-r_minute*Math.cos(theta_minute-Math.PI/2)+y_minute),
      (int)(cy-r_minute*Math.cos(theta_minute+Math.PI/2)+y_minute)};

    // HOURS
    double r_hour = Math.sqrt(4.0/5.0)*r;
    double theta_hour = 2*Math.PI*(hours%12.0)/12.0;
    double x_hour = r_hour*Math.sin(theta_hour);
    double y_hour = -r_hour*Math.cos(theta_hour);
    int[] hour_xs = {
      (int)(cx+r_hour*Math.sin(theta_hour+Math.PI/2)/2),
      (int)(cx+r_hour*Math.sin(theta_hour-Math.PI/2)/2),
      (int)(cx+r_hour*Math.sin(theta_hour-Math.PI/2)/2+x_hour),
      (int)(cx+r_hour*Math.sin(theta_hour+Math.PI/2)/2+x_hour)};
    int[] hour_ys = {
      (int)(cy-r_hour*Math.cos(theta_hour+Math.PI/2)/2),
      (int)(cy-r_hour*Math.cos(theta_hour-Math.PI/2)/2),
      (int)(cy-r_hour*Math.cos(theta_hour-Math.PI/2)/2+y_hour),
      (int)(cy-r_hour*Math.cos(theta_hour+Math.PI/2)/2+y_hour)};



    // turn on transparency capablity
    Graphics2D g2 = (Graphics2D) g;
    g2.setRenderingHint(RenderingHints.KEY_ANTIALIASING,
      RenderingHints.VALUE_ANTIALIAS_ON);

    // CLEAR SCREEN
    //g2.clearRect(0,0,w,h);
    g2.setColor(background_color);
    g2.fillRect(0,0,w,h);

    // DRAW CLOCK
    g2.setComposite(AlphaComposite.getInstance(AlphaComposite.SRC_OVER,
        alpha));
    //g2.setColor(background_color);
    //g2.fillOval(cx-r,cy-r,2*r,2*r);
    g2.setColor(clock_color);
    g2.fillOval(cx-r,cy-r,2*r,2*r);
    g2.drawOval(cx-r,cy-r,2*r,2*r);

    // DRAW MINUTES RECT
    //g2.setColor(background_color);
    //g2.fillPolygon(minute_xs,minute_ys,minute_xs.length);
    g2.setColor(minute_color);
    g2.fillPolygon(minute_xs,minute_ys,minute_xs.length);
    g2.drawPolygon(minute_xs,minute_ys,minute_xs.length);

    // DRAW HOUR SQUARE
    //g2.setColor(background_color);
    //g2.fillPolygon(hour_xs,hour_ys,hour_xs.length);
    g2.setColor(hour_color);
    g2.fillPolygon(hour_xs,hour_ys,hour_xs.length);
    g2.drawPolygon(hour_xs,hour_ys,hour_xs.length);

    animating = true;
  } 

}