1 /*
2
3 dsh-interpolate Interpolation and easing functions.
4 Copyright (c) 2009-2013 held jointly by the individual authors.
5
6 This library is free software; you can redistribute it and/or modify it
7 under the terms of the GNU Lesser General Public License as published
8 by the Free Software Foundation; either version 3 of the License, or (at
9 your option) any later version.
10
11 This library is distributed in the hope that it will be useful, but WITHOUT
12 ANY WARRANTY; with out even the implied warranty of MERCHANTABILITY or
13 FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
14 License for more details.
15
16 You should have received a copy of the GNU Lesser General Public License
17 along with this library; if not, write to the Free Software Foundation,
18 Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
19
20 > http://www.fsf.org/licensing/licenses/lgpl.html
21 > http://www.opensource.org/licenses/lgpl-license.php
22
23 */
24 package org.dishevelled.interpolate;
25
26 /**
27 * Composite easing function, <code>g(h(value))</code>.
28 *
29 * @author Michael Heuer
30 * @version $Revision$ $Date$
31 */
32 public final class CompositeEasingFunction
33 implements EasingFunction
34 {
35 /** Easing function g, in <code>g(h(value))</code>. */
36 private final EasingFunction g;
37
38 /** Easing function h, in <code>g(h(value))</code>. */
39 private final EasingFunction h;
40
41
42 /**
43 * Create a new composite easing function <code>g(h(value))</code> with the
44 * specified easing functions <code>g</code> and <code>h</code>.
45 *
46 * @param g easing function g, in <code>g(h(value))</code>, must not be null
47 * @param h easing function h, in <code>g(h(value))</code>, must not be null
48 */
49 public CompositeEasingFunction(final EasingFunction g, final EasingFunction h)
50 {
51 if (g == null)
52 {
53 throw new IllegalArgumentException("g must not be null");
54 }
55 if (h == null)
56 {
57 throw new IllegalArgumentException("h must not be null");
58 }
59 this.g = g;
60 this.h = h;
61 }
62
63
64 /** {@inheritDoc} */
65 public Double evaluate(final Double value)
66 {
67 return g.evaluate(h.evaluate(value));
68 }
69 }