convertPressure function

double convertPressure(Pressure from, Pressure to, double value)

Convert Pressure. 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 pressure = convertPressure(
    Pressure.bar, // from
    Pressure.pascal, // to
    1, // value
  );
  print(pressure); // 100000
}

Read the documentation for more information

Implementation

double convertPressure(Pressure from, Pressure to, double value) {
  verify(from, to, value);
  if (from == to) return value;
  if (from == Pressure.pascal) {
    switch (to) {
      case Pressure.bar:
        return value / 100000;
      case Pressure.poundForcePerSquareInch:
        return value / 6895; // approximate
      case Pressure.standartAtmosphere:
        return value / 101325;
      case Pressure.torr:
        return value / 133;
      default:
        return value;
    }
  } else {
    final pascal = Pressure.pascal;
    switch (from) {
      case Pressure.bar:
        return convertPressure(pascal, to, value * 100000);
      case Pressure.poundForcePerSquareInch:
        return convertPressure(pascal, to, value * 6895);
      case Pressure.standartAtmosphere:
        return convertPressure(pascal, to, value * 101325);
      case Pressure.torr:
        return convertPressure(pascal, to, value * 133);
      default:
        return value;
    }
  }
}