01: /*
02: The contents of this file are subject to the Common Public Attribution License
03: Version 1.0 (the "License"); you may not use this file except in compliance with
04: the License. You may obtain a copy of the License at
05: http://www.projity.com/license . The License is based on the Mozilla Public
06: License Version 1.1 but Sections 14 and 15 have been added to cover use of
07: software over a computer network and provide for limited attribution for the
08: Original Developer. In addition, Exhibit A has been modified to be consistent
09: with Exhibit B.
10:
11: Software distributed under the License is distributed on an "AS IS" basis,
12: WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License for the
13: specific language governing rights and limitations under the License. The
14: Original Code is OpenProj. The Original Developer is the Initial Developer and
15: is Projity, Inc. All portions of the code written by Projity are Copyright (c)
16: 2006, 2007. All Rights Reserved. Contributors Projity, Inc.
17:
18: Alternatively, the contents of this file may be used under the terms of the
19: Projity End-User License Agreeement (the Projity License), in which case the
20: provisions of the Projity License are applicable instead of those above. If you
21: wish to allow use of your version of this file only under the terms of the
22: Projity License and not to allow others to use your version of this file under
23: the CPAL, indicate your decision by deleting the provisions above and replace
24: them with the notice and other provisions required by the Projity License. If
25: you do not delete the provisions above, a recipient may use your version of this
26: file under either the CPAL or the Projity License.
27:
28: [NOTE: The text of this license may differ slightly from the text of the notices
29: in Exhibits A and B of the license at http://www.projity.com/license. You should
30: use the latest text at http://www.projity.com/license for your modifications.
31: You may not remove this license text from the source files.]
32:
33: Attribution Information: Attribution Copyright Notice: Copyright © 2006, 2007
34: Projity, Inc. Attribution Phrase (not exceeding 10 words): Powered by OpenProj,
35: an open source solution from Projity. Attribution URL: http://www.projity.com
36: Graphic Image as provided in the Covered Code as file: openproj_logo.png with
37: alternatives listed on http://www.projity.com/logo
38:
39: Display of Attribution Information is required in Larger Works which are defined
40: in the CPAL as a work which combines Covered Code or portions thereof with code
41: not governed by the terms of the CPAL. However, in addition to the other notice
42: obligations, all copies of the Covered Code in Executable and Source Code form
43: distributed must, as a form of attribution of the original author, include on
44: each user interface screen the "OpenProj" logo visible to all users. The
45: OpenProj logo should be located horizontally aligned with the menu bar and left
46: justified on the top left of the screen adjacent to the File menu. The logo
47: must be at least 100 x 25 pixels. When users click on the "OpenProj" logo it
48: must direct them back to http://www.projity.com.
49: */
50: package com.projity.util;
51:
52: /**
53: *
54: */
55: public class MathUtils {
56: /**
57: * Collapse number down to +1 0 or -1 depending on sign.
58: * Typically used in compare routines to collapse a difference
59: * of two longs to an int.
60: *
61: * @param diff usually represents the difference of two longs.
62: *
63: * @return signum of diff, +1, 0 or -1.
64: */
65: public static final int signum(long diff) {
66: if (diff > 0)
67: return 1;
68: if (diff < 0)
69: return -1;
70: else
71: return 0;
72: } // end signum
73:
74: public static final int signum(double diff) {
75: if (diff > 0)
76: return 1;
77: if (diff < 0)
78: return -1;
79: else
80: return 0;
81: } // end signum
82:
83: public static final double inRange(double value, double min,
84: double max) {
85: if (value < min)
86: return min;
87: if (value > max)
88: return max;
89: return value;
90: }
91:
92: private static double roundValue = 1000000.0D;
93:
94: public static double roundToDecentPrecision(double value) {
95: double z = Math.round(roundValue * value);
96: return z / roundValue;
97: }
98: }
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