1 package org.djunits.unit.scale; 2 3 import java.io.Serializable; 4 5 /** 6 * Scales for unit conversion, offers functions to and from SI units. E.g., LinearScale for Length, Area, etc. LinearOffsetScale 7 * for Temperature. PercentScale for Angle. LogarithmicScale for Sound, GradeScale for percentual angle. 8 * <p> 9 * Copyright (c) 2013-2024 Delft University of Technology, PO Box 5, 2600 AA, Delft, the Netherlands. All rights reserved. <br> 10 * BSD-style license. See <a href="https://djunits.org/docs/license.html">DJUNITS License</a>. 11 * </p> 12 * @author <a href="https://www.tudelft.nl/averbraeck">Alexander Verbraeck</a> 13 * @author <a href="https://www.tudelft.nl/staff/p.knoppers/">Peter Knoppers</a> 14 */ 15 public interface Scale extends Serializable 16 { 17 /** 18 * Convert a value to an SI value using this scale. 19 * @param value double; the value to convert 20 * @return the corresponding SI value 21 */ 22 double toStandardUnit(double value); 23 24 /** 25 * Convert a value from an SI value to a value in the unit that uses this scale. 26 * @param value double; the value to convert 27 * @return the corresponding value in the given unit 28 */ 29 double fromStandardUnit(double value); 30 31 /** 32 * Return whether a scale is a 'standard' scale that would belong to an SI unit. For a linear scale, any scale with 33 * conversion factor 1 would be considered standard. For an offset scale, it would be considered standard if the offset is 0 34 * and the conversion factor is 1. 35 * @return boolean; whether the scale is a 'standard' scale that would belong to an SI unit. 36 */ 37 boolean isBaseSIScale(); 38 39 }