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Experimental: Add CGS and FPS unit systems #630

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Experimental: Add CGS and FPS unit systems #630

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42 changes: 38 additions & 4 deletions UnitsNet/UnitSystem.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -81,12 +81,46 @@ public override int GetHashCode()
/// </summary>
public BaseUnits BaseUnits{ get; }

private static readonly BaseUnits SIBaseUnits = new BaseUnits(LengthUnit.Meter, MassUnit.Kilogram, DurationUnit.Second,
ElectricCurrentUnit.Ampere, TemperatureUnit.Kelvin, AmountOfSubstanceUnit.Mole, LuminousIntensityUnit.Candela);

/// <summary>
/// Gets the SI unit system.
/// </summary>
public static UnitSystem SI { get; } = new UnitSystem(SIBaseUnits);
public static UnitSystem SI { get; } = new UnitSystem(new BaseUnits(
LengthUnit.Meter,
MassUnit.Kilogram,
DurationUnit.Second,
ElectricCurrentUnit.Ampere,
TemperatureUnit.Kelvin,
AmountOfSubstanceUnit.Mole,
LuminousIntensityUnit.Candela));

// TODO Figure out the undefined ones
// https://no.wikipedia.org/wiki/CGS-systemet
/// <summary>
/// Gets the centimeter-gram-second system.
/// https://www.sizes.com/units/sys_cgs_em.htm
/// </summary>
public static UnitSystem CGS { get; } = new UnitSystem(new BaseUnits(
LengthUnit.Centimeter,
MassUnit.Gram,
DurationUnit.Second,
ElectricCurrentUnit.Undefined, // TODO Add Abampere (abA): https://www.sizes.com/units/abampere.htm
TemperatureUnit.Undefined, // TODO Whaaaa?
AmountOfSubstanceUnit.Undefined,
LuminousIntensityUnit.Undefined));

// TODO Figure out the undefined ones
/// <summary>
/// Gets the foot-pound-second system.
/// https://www.sizes.com/units/sys_ftlbsec.htm
/// https://en.wikipedia.org/wiki/Foot%E2%80%93pound%E2%80%93second_system
/// </summary>
public static UnitSystem FPS { get; } = new UnitSystem(new BaseUnits(
LengthUnit.Foot,
MassUnit.Pound,
DurationUnit.Second,
ElectricCurrentUnit.Undefined, // TODO 1 fpsm unit = 117.581866 cgsm unit (Biot-second) from wiki
TemperatureUnit.Undefined, // TODO Is it Fahrenheit??
AmountOfSubstanceUnit.Undefined, // TODO Add PoundMole (lb-mol) = 273.16e24
LuminousIntensityUnit.Undefined)); // TODO Add FootCandle?
}
}