source: golgotha/src/i4/math/random.cc @ 608 Tweet

/********************************************************************** <BR>
  This file is part of Crack dot Com's free source code release of
  Golgotha. <a href="http://www.crack.com/golgotha_release"> <BR> for
  information about compiling & licensing issues visit this URL</a> 
  <PRE> If that doesn't help, contact Jonathan Clark at 
  golgotha_source@usa.net (Subject should have "GOLG" in it) 
***********************************************************************/

#include "arch.hh"

enum { TSIZE=512 };
static w32   w32_rtable[TSIZE];
static float f_rtable[TSIZE];
static int seed=0;
static int initialized=0;

void next_seed()
{
  if (!initialized)
  {
    w32 inc=0xacd2d391, mul=0xf34f9201, x=0;
    for (int i=0; i<TSIZE; i++)
    {     
      w32_rtable[i]=x;
      f_rtable[i]=(double)x/(double)0xffffffff;
      x=(x+inc)*mul;
    }
    initialized=1;
  }

  seed++;  
}

w32 i4_rand() 
{ 
  next_seed();
  return w32_rtable[seed];
}

float i4_float_rand() 
{ 
  next_seed();
  return f_rtable[seed];
}

void i4_rand_reset(w32 _seed)
{
  seed=_seed % TSIZE;
}