Turtle snow fall

From JSXGraph Wiki
Jump to: navigation, search


References

The source code

function side(size, level) {
    if (level==0) {
        t.fd(size);
    } else {
        side(size/3, level-1);
        t.lt(60);
        side(size/3, level-1);
        t.rt(120);
        side(size/3, level-1);
        t.lt(60);
        side(size/3, level-1);
    }
}

function snowflake(size, level) {
    for (var i=0; i<3; i++) {
        side(size, level);
        t.rt(120);
    }
}
t.ht();
function snow() {
   counter++;
   if (counter>500) {
      counter = 0;
      t.cs();
   }
   t.setPos(Math.random()*600-300,Math.random()*600-300);
   snowflake(30*Math.random(),Math.floor(Math.random()*4));
   active = setTimeout(snow,200);
}
t.setPenColor('#ffff00');
counter = 0;
snow();