overlaps360 method

bool overlaps360(AngleRange range2)

Returns true if this angle range overlaps range2's angle range (exclusive of the endpoints).

The ranges are projected onto the 0-360 degree range.

Implementation

bool overlaps360(AngleRange range2) {
  if (overlaps(range2)) return true;

  // No direct overlap... check if the projections overlap
  final list1 = <AngleRange>[];
  final min360 = minValue.angle360;
  var max360 = maxValue.angle360;
  if (max360 < min360) {
    max360 = max360 + Angle(rad: twoPi) as Angle;
    list1
      ..add(AngleRange(min360, Angle(rad: twoPi)))
      ..add(AngleRange(Angle(rad: 0), max360));
  } else {
    list1.add(AngleRange(min360, max360));
  }

  final list2 = <AngleRange>[];
  final min360two = range2.minValue.angle360;
  var max360two = range2.maxValue.angle360;
  if (max360two < min360two) {
    max360two = max360two + Angle(rad: twoPi) as Angle;
    list2
      ..add(AngleRange(min360two, Angle(rad: twoPi)))
      ..add(AngleRange(Angle(rad: 0), max360two));
  } else {
    list2.add(AngleRange(min360two, max360two));
  }

  for (final range1 in list1) {
    for (final range2 in list2) {
      if (range1.overlaps(range2)) return true;
    }
  }

  return false;
}