A kind of snow crystal /Processing で雪の結晶を描く

snow-crystal.pde

void setup() {
  size(500, 500);
  crystal(250, 250, 100);
}

void hexagon(float x, float y, float r) {
  pushMatrix();
  translate(x, y);
  beginShape();
  for (int i = 0; i < 6; i++) {
    vertex(r*cos(radians(60*i)),
           r*sin(radians(60*i)));
  }
  endShape(CLOSE);
  popMatrix();
}

void crystal(float x, float y, float r) {
  noStroke();
  fill(255);
  pushMatrix();
  translate(x, y);
  hexagon(0, 0, 0.5*r);
  for (int i = 0; i < 6; i++) {
    hexagon(0.75*r*cos(radians(60*i)),
            0.75*r*sin(radians(60*i)),
            0.25*r);
  }
  popMatrix();
}