108 lines
3.1 KiB
C
108 lines
3.1 KiB
C
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/*
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Copyright (C) 2004 Michael Liebscher
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License
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as published by the Free Software Foundation; either version 2
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of the License, or (at your option) any later version.
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This program 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
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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/*
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* random_number.c: Wolfenstein3-D random number generator.
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*
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* Author: Michael Liebscher <johnnycanuck@users.sourceforge.net>
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* Date: 2004
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*
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* Acknowledgement:
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* This code was derived from Wolfenstein3-D, and was originally
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* written by Id Software, Inc.
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*
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*/
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#include "../wolfiphone.h"
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/* This is just John Carmack's table driven pseudo-random number generator */
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W32 rndtable[] = {
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0, 8, 109, 220, 222, 241, 149, 107, 75, 248, 254, 140, 16, 66,
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74, 21, 211, 47, 80, 242, 154, 27, 205, 128, 161, 89, 77, 36,
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95, 110, 85, 48, 212, 140, 211, 249, 22, 79, 200, 50, 28, 188,
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52, 140, 202, 120, 68, 145, 62, 70, 184, 190, 91, 197, 152, 224,
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149, 104, 25, 178, 252, 182, 202, 182, 141, 197, 4, 81, 181, 242,
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145, 42, 39, 227, 156, 198, 225, 193, 219, 93, 122, 175, 249, 0,
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175, 143, 70, 239, 46, 246, 163, 53, 163, 109, 168, 135, 2, 235,
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25, 92, 20, 145, 138, 77, 69, 166, 78, 176, 173, 212, 166, 113,
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94, 161, 41, 50, 239, 49, 111, 164, 70, 60, 2, 37, 171, 75,
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136, 156, 11, 56, 42, 146, 138, 229, 73, 146, 77, 61, 98, 196,
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135, 106, 63, 197, 195, 86, 96, 203, 113, 101, 170, 247, 181, 113,
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80, 250, 108, 7, 255, 237, 129, 226, 79, 107, 112, 166, 103, 241,
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24, 223, 239, 120, 198, 58, 60, 82, 128, 3, 184, 66, 143, 224,
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145, 224, 81, 206, 163, 45, 63, 90, 168, 114, 59, 33, 159, 95,
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28, 139, 123, 98, 125, 196, 15, 70, 194, 253, 54, 14, 109, 226,
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71, 17, 161, 93, 186, 87, 244, 138, 20, 52, 123, 251, 26, 36,
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17, 46, 52, 231, 232, 76, 31, 221, 84, 37, 216, 165, 212, 106,
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197, 242, 98, 43, 39, 175, 254, 145, 190, 84, 118, 222, 187, 136,
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120, 163, 236, 249
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};
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W32 rndindex = 0;
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/*
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-----------------------------------------------------------------------------
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Function:
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Parameters:
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Returns:
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Notes:
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-----------------------------------------------------------------------------
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*/
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PUBLIC void US_InitRndT( int randomize )
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{
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if( randomize )
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{
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rndindex = time( NULL ) & 0xFF;
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}
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else
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{
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rndindex = 0;
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}
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}
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/*
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-----------------------------------------------------------------------------
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Function:
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Parameters:
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Returns:
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Notes:
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-----------------------------------------------------------------------------
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*/
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PUBLIC int US_RndT( void )
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{
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rndindex++;
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rndindex &= 0xFF;
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return rndtable[ rndindex ];
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}
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