Orientierung 2

float dist = 40, radius = dist/2, alpha = 0, speed = 500;

float px, py, x, y, k;

​

void setup() {

  size(500, 500);

  background(0);

  stroke(#4883FF);

  smooth();

  frameRate(80);

  px = radius;

  py = 0;

}

​

void draw() {

  k = speed/radius;

  alpha += k;

  radius += dist/(360/k);

  x = radius*cos(radians(alpha));

  y = -radius*sin(radians(alpha));

  translate(width/2, height/2);

  line(px, py, x, y);

  px = x;

  py = y;

}