// Kleeblatt-Kurven
// https://www.mathe-cd.de/DEMO-CD/5_Besonderes/54_Algebraische%20Kurven/54103%20Kleeblattkurven.pdf
function x (t) return 4 * sin(3*t)*sin(t);
function y (t) return 4 * sin(3*t)*cos(t);

svg_open  (100,100,50,50);
svg_kreuz 10;
svg_kurve ( x,y, 0,PI, 'zoom=10','sf=blue');
svg_close '/tmp/filu/test_reca/test_kurven/kleeblatt.svg';