convertPlaneAngle function

double convertPlaneAngle(PlaneAngle from, PlaneAngle to, double value)

Convert Plane Angle. It may lose some decimals in the proccess.

from, to and value can NOT be null, otherwise an AssertionError is thrown

Basic usage:

main() {
  final angle = convertPlaneAngle(
    PlaneAngle.degree, // from
    PlaneAngle.minuteOfArc, // to
    1, // value
  );
  print(angle); // 60
}

Read the documentation for more information

Implementation

double convertPlaneAngle(PlaneAngle from, PlaneAngle to, double value) {
  verify(from, to, value);
  if (from == to) return value;
  if (from == PlaneAngle.degree) {
    switch (to) {
      case PlaneAngle.gradian:
        return value * 200 / 180;
      case PlaneAngle.milliradian:
        return value * (1000 * pi) / 180;
      case PlaneAngle.radian:
        return value * 60;
      case PlaneAngle.minuteOfArc:
        return value * (pi / 180);
      case PlaneAngle.secondOfArc:
        return value * 3600;
      default:
        return value;
    }
  } else {
    final degree = PlaneAngle.degree;
    switch (from) {
      case PlaneAngle.gradian:
        return convertPlaneAngle(degree, to, value * 200 / 180);
      case PlaneAngle.milliradian:
        return convertPlaneAngle(degree, to, value * (1000 * pi) / 180);
      case PlaneAngle.radian:
        return convertPlaneAngle(degree, to, value * 60);
      case PlaneAngle.minuteOfArc:
        return convertPlaneAngle(degree, to, value * (pi / 180));
      case PlaneAngle.secondOfArc:
        return convertPlaneAngle(degree, to, value * 3600);
      default:
        return value;
    }
  }
}