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/* Goom Project
* Copyright (C) <2003> iOS-Software
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library 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
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#ifndef _GOOMTOOLS_H
#define _GOOMTOOLS_H
#include "goom_config.h"
/**
* Random number generator wrapper for faster random number.
*/
#define GOOM_NB_RAND 0x10000
typedef struct _GOOM_RANDOM {
int array[GOOM_NB_RAND];
unsigned short pos;
} GoomRandom;
GoomRandom *goom_random_init(int i);
void goom_random_free(GoomRandom *grandom);
inline static int goom_random(GoomRandom *grandom) {
grandom->pos++; /* works because pos is an unsigned short */
return grandom->array[grandom->pos];
}
inline static int goom_irand(GoomRandom *grandom, int i) {
grandom->pos++;
return grandom->array[grandom->pos] % i;
}
/* called to change the specified number of value in the array, so that the array does not remain the same*/
void goom_random_update_array(GoomRandom *grandom, int numberOfValuesToChange);
#endif
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