contrib/other/sdldoom-1.10/m_fixed.h

   1 // Emacs style mode select   -*- C++ -*-
   2 //-----------------------------------------------------------------------------
   3 //
   4 // $Id:$
   5 //
   6 // Copyright (C) 1993-1996 by id Software, Inc.
   7 //
   8 // This source is available for distribution and/or modification
   9 // only under the terms of the DOOM Source Code License as
  10 // published by id Software. All rights reserved.
  11 //
  12 // The source is distributed in the hope that it will be useful,
  13 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 // FITNESS FOR A PARTICULAR PURPOSE. See the DOOM Source Code License
  15 // for more details.
  16 //
  17 // DESCRIPTION:
  18 //      Fixed point arithemtics, implementation.
  19 //
  20 //-----------------------------------------------------------------------------
  21
  22
  23 #ifndef __M_FIXED__
  24 #define __M_FIXED__
  25
  26
  27 #ifdef __GNUG__
  28 #pragma interface
  29 #endif
  30
  31
  32 //
  33 // Fixed point, 32bit as 16.16.
  34 //
  35 #define FRACBITS                16
  36 #define FRACUNIT                (1<<FRACBITS)
  37
  38 typedef int fixed_t;
  39
  40 fixed_t FixedMul        (fixed_t a, fixed_t b);
  41 fixed_t FixedDiv        (fixed_t a, fixed_t b);
  42 fixed_t FixedDiv2       (fixed_t a, fixed_t b);
  43
  44
  45
  46 #endif
  47 //-----------------------------------------------------------------------------
  48 //
  49 // $Log:$
  50 //
  51 //-----------------------------------------------------------------------------