3 * Routines to handle random number generation and hide platform differences.
6 // Written by Curtis Olson, started July 1997.
8 // Copyright (C) 1997 Curtis L. Olson - http://www.flightgear.org/~curt
10 // This library is free software; you can redistribute it and/or
11 // modify it under the terms of the GNU Library General Public
12 // License as published by the Free Software Foundation; either
13 // version 2 of the License, or (at your option) any later version.
15 // This library is distributed in the hope that it will be useful,
16 // but WITHOUT ANY WARRANTY; without even the implied warranty of
17 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
18 // Library General Public License for more details.
20 // You should have received a copy of the GNU Library General Public
21 // License along with this library; if not, write to the
22 // Free Software Foundation, Inc., 59 Temple Place - Suite 330,
23 // Boston, MA 02111-1307, USA.
38 * Seed the random number generater with time() so we don't see the
39 * same sequence every time.
41 void sg_srandom_time();
44 * Seed the random number generater with time() in 10 minute intervals
45 * so we get the same sequence within 10 minutes interval.
46 * This is useful for synchronizing two display systems.
48 void sg_srandom_time_10();
51 * Seed the random number generater with your own seed so can set up
52 * repeatable randomization.
53 * @param seed random number generator seed
55 void sg_srandom( unsigned int seed );
58 * Return a random number between [0.0, 1.0)
59 * @return next "random" number in the "random" sequence
69 #endif // _SG_RANDOM_H