advtools.c

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/***********************************************************************
 Freeciv - Copyright (C) 1996 - A Kjeldberg, L Gregersen, P Unold
   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, 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.
***********************************************************************/
 
#ifdef HAVE_CONFIG_H
#include <fc_config.h>
#endif
 
#include <math.h>
 
#include "advtools.h"
 
/**********************************************************************/
adv_want amortize(adv_want benefit, int delay)
{
  double discount = 1.0 - 1.0 / ((double)MORT);
 
  /* Note there's no rounding here.  We could round but it would probably
   * be better just to return (and take) a double for the benefit. */
  return benefit * pow(discount, delay);
}