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  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. //-----------------------------------------------------------------------------
  52.