gistfile1.txt

size(400,400);

int off_x = 200;
int off_y = 200;
int r = 30;

PVector radius, nextradius, center_to_center, center;
center = new PVector(0, 0);
radius = new PVector(r, 0);
nextradius = new PVector(r, 0);
nextradius.rotate(TWO_PI /6.0);

center_to_center = new PVector(1,0);
center_to_center.setMag(2 * (float)Math.sqrt(3) / 2.0);
center_to_center.mult(r);
center_to_center.rotate(PI / 6.0);

for (float theta = 0; theta < TWO_PI; theta += TWO_PI / 6.0) {
  line(radius.x + off_x, radius.y + off_y, nextradius.x + off_x, nextradius.y + off_y);
  radius.rotate(TWO_PI / 6.0);
  nextradius.rotate(TWO_PI / 6.0);
}

for (int i = 0; i < 6; i++) {
  radius = new PVector(r, 0);
  nextradius = new PVector(r, 0);
  nextradius.rotate(TWO_PI /6.0);
  
  for (float theta = 0; theta < TWO_PI; theta += TWO_PI / 6.0) {
    line(
      center_to_center.x + radius.x + off_x,
      center_to_center.y + radius.y + off_y,
      center_to_center.x + nextradius.x + off_x,
      center_to_center.y + nextradius.y + off_y
    );
    radius.rotate(TWO_PI / 6.0);
    nextradius.rotate(TWO_PI / 6.0);
  }
  
  center_to_center.rotate(PI / 3.0);
}

line(0 + off_x, 0 + off_y, center_to_center.x + off_x, center_to_center.y + off_y);