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Add strange units to the distance conversion (closes #703)
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Alexander Bock
@@ -49,7 +49,17 @@ enum class DistanceUnit {
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Parsec,
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Kiloparsec,
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Megaparsec,
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Gigaparsec
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Gigaparsec,
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// Weird units
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Thou,
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Inch,
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Foot,
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Yard,
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Chain,
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Furlong,
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Mile,
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League
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};
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// Assumption: Unit names are sequential in memory
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@@ -67,6 +77,15 @@ constexpr const char* DistanceUnitParsec = "parsec";
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constexpr const char* DistanceUnitKiloparsec = "kiloparsec";
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constexpr const char* DistanceUnitMegaparsec = "megaparsec";
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constexpr const char* DistanceUnitGigaparsec = "gigaparsec";
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constexpr const char* DistanceUnitThou = "thou";
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constexpr const char* DistanceUnitInch = "inch";
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constexpr const char* DistanceUnitFoot = "foot";
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constexpr const char* DistanceUnitYard = "yard";
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constexpr const char* DistanceUnitChain = "chain";
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constexpr const char* DistanceUnitFurlong = "furlong";
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constexpr const char* DistanceUnitMile = "mile";
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constexpr const char* DistanceUnitLeague = "league";
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// Assumption: Unit names are sequential in memory
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constexpr const char* DistanceUnitNanometers = "nanometers";
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@@ -83,32 +102,46 @@ constexpr const char* DistanceUnitParsecs = "parsecs";
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constexpr const char* DistanceUnitKiloparsecs = "kiloparsecs";
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constexpr const char* DistanceUnitMegaparsecs = "megaparsecs";
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constexpr const char* DistanceUnitGigaparsecs = "gigaparsecs";
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constexpr const char* DistanceUnitThous = "thou";
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constexpr const char* DistanceUnitInches = "inches";
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constexpr const char* DistanceUnitFeet = "feet";
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constexpr const char* DistanceUnitYards = "yards";
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constexpr const char* DistanceUnitChains = "chains";
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constexpr const char* DistanceUnitFurlongs = "furlongs";
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constexpr const char* DistanceUnitMiles = "miles";
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constexpr const char* DistanceUnitLeagues = "leagues";
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constexpr const std::array<DistanceUnit, static_cast<int>(DistanceUnit::Gigaparsec) + 1>
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constexpr const std::array<DistanceUnit, static_cast<int>(DistanceUnit::League) + 1>
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DistanceUnits = {
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DistanceUnit::Nanometer, DistanceUnit::Micrometer, DistanceUnit::Millimeter,
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DistanceUnit::Meter, DistanceUnit::Kilometer, DistanceUnit::AU,
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DistanceUnit::Lighthour, DistanceUnit::Lightday, DistanceUnit::Lightmonth,
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DistanceUnit::Lightyear, DistanceUnit::Parsec, DistanceUnit::Kiloparsec,
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DistanceUnit::Megaparsec, DistanceUnit::Gigaparsec
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DistanceUnit::Megaparsec, DistanceUnit::Gigaparsec, DistanceUnit::Thou,
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DistanceUnit::Inch, DistanceUnit::Foot, DistanceUnit::Yard, DistanceUnit::Chain,
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DistanceUnit::Furlong, DistanceUnit::Mile, DistanceUnit::League
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};
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constexpr const std::array<const char*, static_cast<int>(DistanceUnit::Gigaparsec) + 1>
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constexpr const std::array<const char*, static_cast<int>(DistanceUnit::League) + 1>
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DistanceUnitNamesSingular = {
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DistanceUnitNanometer, DistanceUnitMicrometer, DistanceUnitMillimeter,
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DistanceUnitMeter, DistanceUnitKilometer, DistanceUnitAU, DistanceUnitLighthour,
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DistanceUnitLightday, DistanceUnitLightmonth, DistanceUnitLightyear,
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DistanceUnitParsec, DistanceUnitKiloparsec, DistanceUnitMegaparsec,
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DistanceUnitGigaparsec
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DistanceUnitGigaparsec, DistanceUnitThou, DistanceUnitInch, DistanceUnitFoot,
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DistanceUnitYard, DistanceUnitChain, DistanceUnitFurlong, DistanceUnitMile,
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DistanceUnitLeague
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};
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constexpr const std::array<const char*, static_cast<int>(DistanceUnit::Gigaparsec) + 1>
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constexpr const std::array<const char*, static_cast<int>(DistanceUnit::League) + 1>
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DistanceUnitNamesPlural = {
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DistanceUnitNanometers, DistanceUnitMicrometers, DistanceUnitMillimeters,
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DistanceUnitMeters, DistanceUnitKilometers, DistanceUnitAUs, DistanceUnitLighthours,
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DistanceUnitLightdays, DistanceUnitLightmonths, DistanceUnitLightyears,
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DistanceUnitParsecs, DistanceUnitKiloparsecs, DistanceUnitMegaparsecs,
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DistanceUnitGigaparsecs
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DistanceUnitGigaparsecs, DistanceUnitThous, DistanceUnitInches, DistanceUnitFeet,
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DistanceUnitYards, DistanceUnitChains, DistanceUnitFurlongs, DistanceUnitMile,
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DistanceUnitLeague
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};
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constexpr bool isValidDistanceUnitName(const char* name) {
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@@ -132,28 +165,36 @@ constexpr bool isValidDistanceUnitName(const char* name) {
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constexpr const char* nameForDistanceUnit(DistanceUnit unit, bool pluralForm = false) {
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switch (unit) {
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case DistanceUnit::Nanometer:
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case DistanceUnit::Micrometer:
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case DistanceUnit::Millimeter:
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case DistanceUnit::Meter:
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case DistanceUnit::Kilometer:
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case DistanceUnit::AU:
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case DistanceUnit::Lighthour:
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case DistanceUnit::Lightday:
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case DistanceUnit::Lightmonth:
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case DistanceUnit::Lightyear:
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case DistanceUnit::Parsec:
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case DistanceUnit::Kiloparsec:
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case DistanceUnit::Megaparsec:
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case DistanceUnit::Gigaparsec:
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if (pluralForm) {
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return DistanceUnitNamesPlural[static_cast<int>(unit)];
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}
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else {
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return DistanceUnitNamesSingular[static_cast<int>(unit)];
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}
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default:
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throw ghoul::MissingCaseException();
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case DistanceUnit::Nanometer:
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case DistanceUnit::Micrometer:
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case DistanceUnit::Millimeter:
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case DistanceUnit::Meter:
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case DistanceUnit::Kilometer:
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case DistanceUnit::AU:
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case DistanceUnit::Lighthour:
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case DistanceUnit::Lightday:
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case DistanceUnit::Lightmonth:
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case DistanceUnit::Lightyear:
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case DistanceUnit::Parsec:
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case DistanceUnit::Kiloparsec:
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case DistanceUnit::Megaparsec:
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case DistanceUnit::Gigaparsec:
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case DistanceUnit::Thou:
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case DistanceUnit::Inch:
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case DistanceUnit::Foot:
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case DistanceUnit::Yard:
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case DistanceUnit::Chain:
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case DistanceUnit::Furlong:
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case DistanceUnit::Mile:
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case DistanceUnit::League:
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if (pluralForm) {
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return DistanceUnitNamesPlural[static_cast<int>(unit)];
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}
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else {
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return DistanceUnitNamesSingular[static_cast<int>(unit)];
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}
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default:
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throw ghoul::MissingCaseException();
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}
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}
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@@ -221,6 +262,28 @@ constexpr double convertDistance(double meters, DistanceUnit requestedUnit) {
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return meters / (1e6 * distanceconstants::Parsec);
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case DistanceUnit::Gigaparsec:
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return meters / (1e9 * distanceconstants::Parsec);
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// Such wow, such coefficients
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case DistanceUnit::Thou:
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return (meters * 1000.0 / 25.4) * 1000.0; // m -> mm -> inch -> thou
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case DistanceUnit::Inch:
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return (meters * 1000.0 / 25.4); // m -> mm -> inch
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case DistanceUnit::Foot:
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return (meters * 1000.0 / 25.4) / 12.0; // m -> mm -> inch -> feet
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case DistanceUnit::Yard:
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// m -> mm -> inch -> feet -> yard
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return (meters * 1000.0 / 25.4) / 12.0 / 3.0;
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case DistanceUnit::Chain:
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// m -> mm -> inch -> feet -> yard -> chain
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return (meters * 1000.0 / 25.4) / 12.0 / 3.0 / 22.0;
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case DistanceUnit::Furlong:
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// m -> mm -> inch -> feet -> yard -> chain -> furlong
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return (meters * 1000.0 / 25.4) / 12.0 / 3.0 / 22.0 / 10.0;
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case DistanceUnit::Mile:
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// m -> mm -> inch -> feet -> yard -> chain -> furlong -> mile
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return (meters * 1000.0 / 25.4) / 12.0 / 3.0 / 22.0 / 10.0 / 8.0;
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case DistanceUnit::League:
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// m -> mm -> inch -> feet -> yard -> chain -> furlong -> mile -> league
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return (meters * 1000.0 / 25.4) / 12.0 / 3.0 / 22.0 / 10.0 / 8.0 / 3.0;
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default:
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throw ghoul::MissingCaseException();
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}
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