Developer Documentation
 All Classes Namespaces Files Functions Variables Typedefs Enumerations Enumerator Properties Friends Macros Modules Pages
RandomNumberGenerator.hh
1 /* ========================================================================= *
2  * *
3  * OpenMesh *
4  * Copyright (c) 2001-2015, RWTH-Aachen University *
5  * Department of Computer Graphics and Multimedia *
6  * All rights reserved. *
7  * www.openmesh.org *
8  * *
9  *---------------------------------------------------------------------------*
10  * This file is part of OpenMesh. *
11  *---------------------------------------------------------------------------*
12  * *
13  * Redistribution and use in source and binary forms, with or without *
14  * modification, are permitted provided that the following conditions *
15  * are met: *
16  * *
17  * 1. Redistributions of source code must retain the above copyright notice, *
18  * this list of conditions and the following disclaimer. *
19  * *
20  * 2. Redistributions in binary form must reproduce the above copyright *
21  * notice, this list of conditions and the following disclaimer in the *
22  * documentation and/or other materials provided with the distribution. *
23  * *
24  * 3. Neither the name of the copyright holder nor the names of its *
25  * contributors may be used to endorse or promote products derived from *
26  * this software without specific prior written permission. *
27  * *
28  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS *
29  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED *
30  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A *
31  * PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER *
32  * OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, *
33  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, *
34  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR *
35  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF *
36  * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING *
37  * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS *
38  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. *
39  * *
40  * ========================================================================= */
41 
42 /*===========================================================================*\
43  * *
44  * $Revision: 693 $ *
45  * $Date: 2012-09-23 16:25:16 +0200 (So, 23 Sep 2012) $ *
46  * *
47 \*===========================================================================*/
48 
49 
50 //=============================================================================
51 //
52 // Helper Functions for generating a random number between 0.0 and 1.0 with
53 // a garantueed resolution
54 //
55 //=============================================================================
56 
57 
58 #ifndef OPENMESH_UTILS_RANDOMNUMBERGENERATOR_HH
59 #define OPENMESH_UTILS_RANDOMNUMBERGENERATOR_HH
60 
61 
62 //== INCLUDES =================================================================
63 
64 
66 #include <cstdlib>
67 
68 
69 
70 //== NAMESPACES ===============================================================
71 
72 
73 namespace OpenMesh {
74 
75 
76 //=============================================================================
77 
78 
85 class OPENMESHDLLEXPORT RandomNumberGenerator
86 {
87 public:
88 
93  RandomNumberGenerator(const size_t _resolution);
94 
96  double getRand() const;
97 
98  double resolution() const;
99 
100 private:
101 
103  const size_t resolution_;
104 
106  size_t iterations_;
107 
109  double maxNum_;
110 };
111 
112 //=============================================================================
113 } // namespace OpenMesh
114 //=============================================================================
115 #endif // OPENMESH_UTILS_RANDOMNUMBERGENERATOR_HH defined
116 //=============================================================================
117 
size_t iterations_
number of "blocks" of RAND_MAX that make up the desired _resolution
double maxNum_
maximum random number generated, which is used for normalization
const size_t resolution_
desired resolution