source: GTP/trunk/App/Demos/Geom/OgreStuff/include/ode/misc.h @ 1812

Revision 1812, 3.2 KB checked in by gumbau, 18 years ago (diff)
Line 
1/*************************************************************************
2 *                                                                       *
3 * Open Dynamics Engine, Copyright (C) 2001,2002 Russell L. Smith.       *
4 * All rights reserved.  Email: russ@q12.org   Web: www.q12.org          *
5 *                                                                       *
6 * This library is free software; you can redistribute it and/or         *
7 * modify it under the terms of EITHER:                                  *
8 *   (1) The GNU Lesser General Public License as published by the Free  *
9 *       Software Foundation; either version 2.1 of the License, or (at  *
10 *       your option) any later version. The text of the GNU Lesser      *
11 *       General Public License is included with this library in the     *
12 *       file LICENSE.TXT.                                               *
13 *   (2) The BSD-style license that is included with this library in     *
14 *       the file LICENSE-BSD.TXT.                                       *
15 *                                                                       *
16 * This library is distributed in the hope that it will be useful,       *
17 * but WITHOUT ANY WARRANTY; without even the implied warranty of        *
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the files    *
19 * LICENSE.TXT and LICENSE-BSD.TXT for more details.                     *
20 *                                                                       *
21 *************************************************************************/
22
23/* miscellaneous math functions. these are mostly useful for testing */
24
25#ifndef _ODE_MISC_H_
26#define _ODE_MISC_H_
27
28#include <ode/common.h>
29
30
31#ifdef __cplusplus
32extern "C" {
33#endif
34
35
36/* return 1 if the random number generator is working. */
37int dTestRand();
38
39/* return next 32 bit random number. this uses a not-very-random linear
40 * congruential method.
41 */
42unsigned long dRand();
43
44/* get and set the current random number seed. */
45unsigned long  dRandGetSeed();
46void dRandSetSeed (unsigned long s);
47
48/* return a random integer between 0..n-1. the distribution will get worse
49 * as n approaches 2^32.
50 */
51int dRandInt (int n);
52
53/* return a random real number between 0..1 */
54dReal dRandReal();
55
56/* print out a matrix */
57#ifdef __cplusplus
58void dPrintMatrix (const dReal *A, int n, int m, char *fmt = "%10.4f ",
59                   FILE *f=stdout);
60#else
61void dPrintMatrix (const dReal *A, int n, int m, char *fmt, FILE *f);
62#endif
63
64/* make a random vector with entries between +/- range. A has n elements. */
65void dMakeRandomVector (dReal *A, int n, dReal range);
66
67/* make a random matrix with entries between +/- range. A has size n*m. */
68void dMakeRandomMatrix (dReal *A, int n, int m, dReal range);
69
70/* clear the upper triangle of a square matrix */
71void dClearUpperTriangle (dReal *A, int n);
72
73/* return the maximum element difference between the two n*m matrices */
74dReal dMaxDifference (const dReal *A, const dReal *B, int n, int m);
75
76/* return the maximum element difference between the lower triangle of two
77 * n*n matrices */
78dReal dMaxDifferenceLowerTriangle (const dReal *A, const dReal *B, int n);
79
80
81#ifdef __cplusplus
82}
83#endif
84
85#endif
Note: See TracBrowser for help on using the repository browser.