Çemberin merkez koordinatını ve yarı çapını bulma algoritması

class SquareOnCircle {
   public static void main(String[] args) {
      for (int n=3; n<13; n++) {
         circle(n);
      }
   }
 
   private static void circle(int n) {
      System.out.println("Trying circle with " + n + " squares.");
      double r = 0.5;
      double dMin = 1.0;
      double a = 2 * Math.PI / n; // angle between points
      // starting with angle 0, try all points till halfway around
      for (double p1 = Math.PI/2.0; p1 < Math.PI; p1+=a) { 
         double p2 = p1 + a; // next point on the circle 
         double dx = Math.abs(r * Math.cos(p2) - r * Math.cos(p1));
         if (dx < 0.01 / n) dx = 1.0; // catch some weird cases
         double dy = Math.abs(r * Math.sin(p2) - r * Math.sin(p1));
         if (dy < 0.01 / n) dy = 1.0;
         dMin = Math.min(dMin, Math.min(dx, dy));
      }
 
      r /= dMin;
      System.out.println("Radius: " + r);
      double p1 = Math.PI/2;
      for (int j=0; j<n; j++,p1+=a) {
         System.out.format("%7.4f %7.4f 0.5 0.5\n", r * Math.cos(p1), r * Math.sin(p1));
      }
   }
}