radius method

@override double radius(int n)

Implementation

@override
double radius(int n) {
  var rand = sin(n / 0.1).abs();
  var rvalue = (rand * 2 * pi) % (2 * pi);
  final scale =
      (1 - variation1) + variation1 * (0.1 + 0.9 * (rvalue / (2 * pi)));

  return scale *
      (circleSize * (canvasSize.width + canvasSize.height) / 2 / 3)
          .roundToDouble();
}