1 /**************************************************************************
2 * fg_random.c -- routines to handle random number generation
4 * Written by Curtis Olson, started July 1997.
6 * Copyright (C) 1997 Curtis L. Olson - curt@infoplane.com
8 * This program is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU General Public License as
10 * published by the Free Software Foundation; either version 2 of the
11 * License, or (at your option) any later version.
13 * This program is distributed in the hope that it will be useful, but
14 * WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * General Public License for more details.
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
23 * (Log is kept at end of this file)
24 **************************************************************************/
27 #include <stdlib.h> /* for random(), srandom() */
28 #include <time.h> /* for time() to seed srandom() */
30 #include "fg_random.h"
35 # define RAND_MAX 2147483647
40 /* Seed the random number generater with time() so we don't see the
41 * same sequence every time */
42 void fg_srandom(void) {
51 /* return a random number between [0.0, 1.0) */
52 double fg_random(void) {
54 return(rand() / (double)RAND_MAX);
56 return(random() / (double)RAND_MAX);
62 /* Revision 1.1 1997/07/30 16:04:09 curt
63 /* Moved random routines from Utils/ to Math/
65 * Revision 1.1 1997/07/19 22:31:57 curt