// You can find the Turtle API reference here: https://turtletoy.net/syntax
Canvas.setpenopacity(1);

const stepSize = 30;
const radialSpread = 360;
const subdivisions = 13;
const iterations = 3;

function walkAndSplit(tState) {
    console.log(tState.step);
    // t, s, angleSpread, divisions
    tState.turtle.pendown();
    tState.turtle.fd(tState.step);
    var newTs = [];
    var heading = tState.turtle.h();
    heading = heading - (tState.angleSpread / 2);
    const angleChange = tState.angleSpread / tState.divisions;
    for (i = 0; i <= tState.divisions; i++) {
        var nt = tState.turtle.clone();
        nt.seth(heading)
        newTs.push({turtle: nt, step: tState.step, angleSpread: tState.angleSpread *2, divisions: tState.divisions + 1});
        heading += angleChange;
    }
    return newTs;
}

// Global code will be evaluated once.
const turtle = new Turtle();
turtle.penup();
turtle.goto(0,stepSize);
turtle.seth(-90);
turtle.pendown();


var turtles = [{turtle: turtle, step: stepSize, angleSpread: radialSpread, divisions: subdivisions}];
// The walk function will be called until it returns false.
function walk(i) {
    turtles = turtles.flatMap(walkAndSplit);
    console.log(turtles);
    return i < iterations;
}