analogue clock / アナログ時計

analog-clock.pde

float r;

void setup() {
  size(500, 500);
  r = min(width, height) * 7 / 16;
  frameRate(1);
  smooth();
}

void draw() {
  background(255);
  float s = second();
  float m = minute() + s/60;
  float h = hour() + m/60;
  float rs = 0.9 * r;
  float rm = 0.8 * r;
  float rh = 0.7 * r;
  
  translate(width / 2, height / 2);
  rotate(radians(-90));
  // the hour hand
  stroke(0);
  strokeWeight(4);
  line(0, 0, rh * cos(radians(30 * h)), rh * sin(radians(30 * h)));
  // the minute hand
  strokeWeight(2);
  line(0, 0, rm * cos(radians(6 * m)), rm * sin(radians(6 * m)));
  // the second hand
  stroke(255, 0, 0);
  strokeWeight(1);
  line(0, 0, rs * cos(radians(6 * s)), rs * sin(radians(6 * s)));
}