getAngleWith method

Rad getAngleWith(
  1. Line other
)

Get the angle between this line and another line

result is in radian

Implementation

Rad getAngleWith(Line other) {
  // return atan2(other.slope - slope, 1 + slope * other.slope);
  final a1 = _getAtan2(this);
  final a2 = _getAtan2(other);

  if (a1 != double.nan && a2 != double.nan) {
    return a2 - a1;
  }
  return double.nan;
}