Script: Spiral

function start() {
    var center = Playground.AddVector2('center', new Vector2(Playground.PLAYFIELD_WIDTH / 2, Playground.PLAYFIELD_HEIGHT / 2));
    
    var spiralType = Playground.AddChoice('spiralType', 'Linear');
    var sliderType = Playground.AddChoice('sliderType', 'Linear');
    
    var scale = Playground.AddFloat('scale', 20);
    var resolution = Playground.AddInt('resolution', 3);
    var revolutions = Playground.AddInt('revolutions', 2);

    Playground.AddOptionVector2(center, 'Center');
    Playground.AddOptionChoice(spiralType, 'Spiral type', ['Linear', 'Log', 'Square root']);
    Playground.AddOptionChoice(sliderType, 'Slider type', ['Linear', 'Bézier']);
    Playground.AddOptionFloat(scale, 'Scale', 2, 5, 200);
    Playground.AddOptionInt(resolution, 'Resolution', 3, 24);
    Playground.AddOptionInt(revolutions, 'Revolutions', 1, 12);
}

function update() {
    var center = Playground.GetValueVector2('center');
    var spiralType = Playground.GetValueChoice('spiralType');
    var sliderType = Playground.GetValueChoice('sliderType');
    var scale = Playground.GetValueFloat('scale');
    var resolution = Playground.GetValueInt('resolution');
    var revolutions = Playground.GetValueInt('revolutions');

    var points = [];

    for (var i = 0; i < revolutions; i++) {
        for (var j = 0; j < resolution; j++) {
            var angle = (i * 2 * Math.PI) + (j / resolution) * 2 * Math.PI;
            var multiplier = angle;

            if (spiralType == 'Log') {
                if (angle != 0) {
                    multiplier = Math.log(angle);
                }
            } else if (spiralType == 'Square root') {
                multiplier = Math.sqrt(angle);
            }

            points.push(add(center, new Vector2(scale * multiplier * Math.cos(angle), scale * multiplier * Math.sin(angle))));
        }
    }

    if (sliderType == 'Linear') {
        Playground.AddSlider(CurveType.Linear, points);
    } else {
        Playground.AddChoice(CurveType.Bezier, points);
    }
}