Script: Star

function start() {
	var center = Playground.AddVector2('center', new Vector2(Playground.PLAYFIELD_WIDTH / 2, Playground.PLAYFIELD_HEIGHT / 2));
	var majorRadius = Playground.AddFloat('majorRadius', 130);
	var minorRadius = Playground.AddFloat('minorRadius', 70);
	var rotation = Playground.AddFloat('rotation', 180);
	var ngon = Playground.AddInt('ngon', 5);

	Playground.AddOptionVector2(center, 'Center');
	Playground.AddOptionFloat(majorRadius, 'Major radius', 0, 40, 200);
	Playground.AddOptionFloat(minorRadius, 'Minor radius', 0, 40, 200);
	Playground.AddOptionFloat(rotation, 'Rotation', 1, 0, 360);
	Playground.AddOptionInt(ngon, 'N-gon', 3, 16);
}

function update() {
	var center = Playground.GetValueVector2('center');
	var majorRadius = Playground.GetValueFloat('majorRadius');
	var minorRadius = Playground.GetValueFloat('minorRadius');
	var rotation = Playground.GetValueFloat('rotation');
	var ngon = Playground.GetValueInt('ngon');

	var points = [];

	var offset = rotation / 180 * Math.PI;

	var majorBase = add(center, new Vector2(0, majorRadius));
	var minorBase = add(center, new Vector2(0, minorRadius));

	for (var i = 0; i < 2 * ngon + 1; i++) {
		if (i % 2 == 0) {
			points.push(rotate(majorBase, center, offset + i * Math.PI / ngon));
		}
		else {
			points.push(rotate(minorBase, center, offset + i * Math.PI / ngon));
		}
	}

	Playground.AddSlider(CurveType.Linear, points);
}