mirror of
https://git.code.sf.net/p/quake/quakeforge
synced 2024-11-14 00:40:55 +00:00
5188644e75
This gives QF a consistent qualilty PRNG on all platforms. The implementation is slightly different from the standard, but gives the same results for the same speed (details in mersenne.c).
46 lines
1.1 KiB
C
46 lines
1.1 KiB
C
/*
|
|
mersenne.h
|
|
|
|
Mersenne Twister PRNG
|
|
|
|
Copyright (C) 2013 Bill Currie <bill@taniwha.org>
|
|
|
|
Author: Bill Currie <bill@taniwha.org>
|
|
Date: 2013/01/21
|
|
|
|
This program is free software; you can redistribute it and/or
|
|
modify it under the terms of the GNU General Public License
|
|
as published by the Free Software Foundation; either version 2
|
|
of the License, or (at your option) any later version.
|
|
|
|
This program is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
|
|
|
|
See the GNU General Public License for more details.
|
|
|
|
You should have received a copy of the GNU General Public License
|
|
along with this program; if not, write to:
|
|
|
|
Free Software Foundation, Inc.
|
|
59 Temple Place - Suite 330
|
|
Boston, MA 02111-1307, USA
|
|
|
|
*/
|
|
|
|
#ifndef __QF_mersenne_h
|
|
#define __QF_mersenne_h
|
|
|
|
#include "QF/qtypes.h"
|
|
|
|
#define MT_STATE_SIZE 624
|
|
typedef struct {
|
|
uint32_t state[MT_STATE_SIZE];
|
|
int index;
|
|
} mtstate_t;
|
|
|
|
|
|
void mtwist_seed (mtstate_t *state, uint32_t seed);
|
|
uint32_t mtwist_rand (mtstate_t *state);
|
|
|
|
#endif//__QF_mersenne_h
|