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a9b885070e
Java generics are too limited to do what we need. This refactors generic code previously in Unit and Measure into unit-specific classes that can have unit-safe math operations (notably, times and divide) that can return values in known units instead of a wildcarded Measure<?>. Unit-specific measure implementations are automatically generated by ./wpiunits/generate_units.py, which generates generic interfaces and mutable and immutable implementations of those interfaces. These make up the bulk of the diff of this PR (approximately 9300 LOC). This also adds units for angular and linear velocities, accelerations, and momenta; moment of inertia; and torque.
41 lines
1.6 KiB
Java
41 lines
1.6 KiB
Java
// Copyright (c) FIRST and other WPILib contributors.
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// Open Source Software; you can modify and/or share it under the terms of
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// the WPILib BSD license file in the root directory of this project.
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package edu.wpi.first.units;
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/** The base units of measure. */
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public final class BaseUnits {
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private BaseUnits() {
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// Prevent instantiation
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}
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/** The standard unit of distance, meters. */
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public static final DistanceUnit DistanceUnit = new DistanceUnit(null, 1, "Meter", "m");
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/** The standard unit of time, seconds. */
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public static final TimeUnit TimeUnit = new TimeUnit(null, 1, "Second", "s");
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/** The standard unit of mass, kilograms. */
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public static final MassUnit MassUnit = new MassUnit(null, 1, "Kilogram", "Kg");
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/** The standard unit of angles, radians. */
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public static final AngleUnit AngleUnit = new AngleUnit(null, 1, "Radian", "rad");
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/** The standard "unitless" unit. */
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public static final DimensionlessUnit Value = new DimensionlessUnit(null, 1, "<?>", "<?>");
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/** The standard unit of voltage, volts. */
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public static final VoltageUnit VoltageUnit = new VoltageUnit(null, 1, "Volt", "V");
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/** The standard unit of electric current, amperes. */
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public static final CurrentUnit CurrentUnit = new CurrentUnit(null, 1, "Amp", "A");
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/** The standard unit of energy, joules. */
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public static final EnergyUnit EnergyUnit = new EnergyUnit(null, 1, "Joule", "J");
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/** The standard unit of temperature, kelvin. */
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public static final TemperatureUnit TemperatureUnit =
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new TemperatureUnit(null, x -> x, x -> x, "Kelvin", "K");
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}
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