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/**
* Copyright (C) 2019, 2021, 2022, 2024, 2025 Adrien Hopkins
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <https://www.gnu.org/licenses/>.
*/
package sevenUnits.unit;
import sevenUnits.utils.NameSymbol;
/**
* A static utility class that contains units in the British Imperial system.
*
* @author Adrien Hopkins
* @since 2019-10-21
*/
// this class is just constants, most of which are obvious from the variable name
// so no need to check for missing values
@SuppressWarnings("javadoc")
public final class BritishImperial {
/**
* Imperial units that measure area
*
* @author Adrien Hopkins
* @since 2019-11-08
*/
public static final class Area {
public static final LinearUnit SQUARE_FOOT = Length.FOOT.toExponent(2);
public static final LinearUnit SQUARE_YARD = Length.YARD.toExponent(2);
public static final LinearUnit SQUARE_MILE = Length.MILE.toExponent(2);
public static final LinearUnit PERCH = Length.ROD.times(Length.ROD);
public static final LinearUnit ROOD = Length.ROD.times(Length.FURLONG);
public static final LinearUnit ACRE = Length.FURLONG.times(Length.CHAIN);
}
/**
* Imperial units that measure length
*
* @author Adrien Hopkins
* @since 2019-10-28
*/
public static final class Length {
/**
* According to the International Yard and Pound of 1959, a yard is
* defined as exactly 0.9144 metres.
*/
public static final LinearUnit YARD = Metric.METRE.times(0.9144);
public static final LinearUnit FOOT = YARD.dividedBy(3);
public static final LinearUnit INCH = FOOT.dividedBy(12);
public static final LinearUnit THOU = INCH.dividedBy(1000);
/** A chain, equal to 22 yards. */
public static final LinearUnit CHAIN = YARD.times(22);
/** A furlong, equal to 10 chains or 220 yards. */
public static final LinearUnit FURLONG = CHAIN.times(10);
/** A mile, equal to 8 furlongs or 1760 yards. */
public static final LinearUnit MILE = FURLONG.times(8);
/** A league, equal to 3 miles. */
public static final LinearUnit LEAGUE = MILE.times(3);
/** A nautical mile, around 1 arcminute around the Earth's circumference. */
public static final LinearUnit NAUTICAL_MILE = Metric.METRE.times(1852);
public static final LinearUnit CABLE = NAUTICAL_MILE.dividedBy(10);
public static final LinearUnit FATHOM = CABLE.dividedBy(100);
public static final LinearUnit ROD = YARD.times(5.5);
public static final LinearUnit LINK = ROD.dividedBy(25);
}
/**
* British Imperial units that measure mass.
*
* @author Adrien Hopkins
* @since 2019-11-08
*/
public static final class Mass {
public static final LinearUnit POUND = Metric.GRAM.times(453.59237);
public static final LinearUnit OUNCE = POUND.dividedBy(16);
public static final LinearUnit DRACHM = POUND.dividedBy(256);
public static final LinearUnit GRAIN = POUND.dividedBy(7000);
public static final LinearUnit STONE = POUND.times(14);
public static final LinearUnit QUARTER = STONE.times(2);
public static final LinearUnit HUNDREDWEIGHT = QUARTER.times(4);
public static final LinearUnit LONG_TON = HUNDREDWEIGHT.times(20);
public static final LinearUnit SLUG = Metric.KILOGRAM.times(14.59390294);
}
/**
* British Imperial units that measure volume
*
* @author Adrien Hopkins
* @since 2019-11-08
*/
public static final class Volume {
public static final LinearUnit FLUID_OUNCE = Metric.LITRE
.withPrefix(Metric.MILLI).times(28.4130625);
public static final LinearUnit GILL = FLUID_OUNCE.times(5);
public static final LinearUnit PINT = FLUID_OUNCE.times(20);
public static final LinearUnit QUART = PINT.times(2);
public static final LinearUnit GALLON = QUART.times(4);
public static final LinearUnit PECK = GALLON.times(2);
public static final LinearUnit BUSHEL = PECK.times(4);
public static final LinearUnit CUBIC_INCH = Length.INCH.toExponent(3);
public static final LinearUnit CUBIC_FOOT = Length.FOOT.toExponent(3);
public static final LinearUnit CUBIC_YARD = Length.YARD.toExponent(3);
public static final LinearUnit ACRE_FOOT = Area.ACRE.times(Length.FOOT);
}
public static final LinearUnit OUNCE_FORCE = Mass.OUNCE
.times(Metric.Constants.EARTH_GRAVITY);
public static final LinearUnit POUND_FORCE = Mass.POUND
.times(Metric.Constants.EARTH_GRAVITY);
public static final LinearUnit BRITISH_THERMAL_UNIT = Metric.JOULE
.times(1055.06);
public static final LinearUnit CALORIE = Metric.JOULE.times(4.184);
public static final LinearUnit KILOCALORIE = Metric.JOULE.times(4184);
public static final Unit FAHRENHEIT = Unit
.fromConversionFunctions(Metric.KELVIN.getBase(),
tempK -> tempK * 1.8 - 459.67, tempF -> (tempF + 459.67) / 1.8)
.withName(NameSymbol.of("degree Fahrenheit", "\u00B0F"));
}
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