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Java > Open Source Codes > proguard > gui > splash > LinearTiming


1 /*
2  * ProGuard -- shrinking, optimization, obfuscation, and preverification
3  * of Java bytecode.
4  *
5  * Copyright (c) 2002-2007 Eric Lafortune (eric@graphics.cornell.edu)
6  *
7  * This program is free software; you can redistribute it and/or modify it
8  * under the terms of the GNU General Public License as published by the Free
9  * Software Foundation; either version 2 of the License, or (at your option)
10  * any later version.
11  *
12  * This program is distributed in the hope that it will be useful, but WITHOUT
13  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
14  * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
15  * more details.
16  *
17  * You should have received a copy of the GNU General Public License along
18  * with this program; if not, write to the Free Software Foundation, Inc.,
19  * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
20  */
21 package proguard.gui.splash;
22
23 /**
24  * This Timing ramps up linearly from 0 to 1 in a given time interval.
25  *
26  * @author Eric Lafortune
27  */
28 public class LinearTiming implements Timing
29 {
30     private long fromTime;
31     private long toTime;
32
33
34     /**
35      * Creates a new LinearTiming.
36      * @param fromTime the time at which the timing starts ramping up from 0.
37      * @param toTime the time at which the timing stops ramping up at 1.
38      */
39     public LinearTiming(long fromTime, long toTime)
40     {
41         this.fromTime = fromTime;
42         this.toTime = toTime;
43     }
44
45
46     // Implementation for Timing.
47
48     public double getTiming(long time)
49     {
50         // Compute the clamped linear interpolation.
51 return time <= fromTime ? 0.0 :
52                time >= toTime ? 1.0 :
53                                   (double)(time - fromTime) / (double)(toTime - fromTime);
54     }
55 }
56
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