54 lines
1.6 KiB
C
54 lines
1.6 KiB
C
/* Goom Project
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* Copyright (C) <2003> iOS-Software
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
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* Boston, MA 02110-1301, USA.
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*/
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#ifndef _GOOMTOOLS_H
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#define _GOOMTOOLS_H
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#include "goom_config.h"
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/*
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* Random number generator wrapper for faster random number.
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*/
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#define GOOM_NB_RAND 0x10000
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typedef struct _GOOM_RANDOM {
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int array[GOOM_NB_RAND];
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unsigned short pos;
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} GoomRandom;
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GoomRandom *goom_random_init(int i);
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void goom_random_free(GoomRandom *grandom);
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inline static int goom_random(GoomRandom *grandom) {
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grandom->pos++; /* works because pos is an unsigned short */
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return grandom->array[grandom->pos];
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}
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inline static int goom_irand(GoomRandom *grandom, int i) {
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grandom->pos++;
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return grandom->array[grandom->pos] % i;
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}
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/* called to change the specified number of value in the array, so that the array does not remain the same*/
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void goom_random_update_array(GoomRandom *grandom, int numberOfValuesToChange);
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#endif
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