1 package org.djunits.unit.scale;
2
3 /**
4 * Scales for unit conversion, offers functions to and from SI units. E.g., LinearScale for Length, Area, etc. LinearOffsetScale
5 * for Temperature. PercentScale for Angle. LogarithmicScale for Sound.
6 * <p>
7 * Copyright (c) 2013-2018 Delft University of Technology, PO Box 5, 2600 AA, Delft, the Netherlands. All rights reserved. <br>
8 * BSD-style license. See <a href="http://opentrafficsim.org/docs/license.html">OpenTrafficSim License</a>.
9 * </p>
10 * $LastChangedDate: 2015-07-24 02:58:59 +0200 (Fri, 24 Jul 2015) $, @version $Revision: 1147 $, by $Author: averbraeck $,
11 * initial version Oct 11, 2015 <br>
12 * @author <a href="http://www.tbm.tudelft.nl/averbraeck">Alexander Verbraeck</a>
13 * @author <a href="http://www.tudelft.nl/pknoppers">Peter Knoppers</a>
14 */
15 public interface Scale
16 {
17 /**
18 * Convert a value to an SI value using this scale.
19 * @param value 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 the value to convert
27 * @return the corresponding value in the given unit
28 */
29 double fromStandardUnit(double value);
30
31 /**
32 * Return whether this is a base (SI) scale.
33 * @return boolean; whether this is a base (SI) scale or not
34 */
35 boolean isBaseSIScale();
36 }