arcPolygon static method

List<PointD> arcPolygon(PointD center, double width, double height, double startAngle, double stopAngle, DrawConfig config,)

Implementation

static List<PointD> arcPolygon(PointD center, double width, double height,
    double startAngle, double stopAngle, DrawConfig config) {
  double radiusX = (width / 2).abs();
  double radiusY = (height / 2).abs();
  radiusX += config.offsetSymmetric(radiusX * 0.01);
  radiusY += config.offsetSymmetric(radiusY * 0.01);
  double start = startAngle;
  double stop = stopAngle;
  while (start < 0) {
    start += pi * 2;
    stop += pi * 2;
  }
  if ((stop - start) > (pi * 2)) {
    start = 0;
    stop = pi * 2;
  }
  final double ellipseInc = pi * 2 / config.curveStepCount!;
  final double increment = min(ellipseInc / 2, (stop - start) / 2);
  //final double increment = (stop - start) / (config.curveStepCount * 2);
  final List<PointD> points = [];
  for (double angle = start; angle <= stop; angle = angle + increment) {
    points.add(PointD(
        center.x + radiusX * cos(angle), center.y + radiusY * sin(angle)));
  }
  points
    ..add(PointD(
        center.x + radiusX * cos(stop), center.y + radiusY * sin(stop)))
    ..add(center);
  return points;
}