/trickmath.h

https://github.com/AlbertVeli/Carnival · C Header · 72 lines · 9 code · 10 blank · 53 comment · 0 complexity · 967004ff2b0b32157cf4f4d895de01d8 MD5 · raw file 

    

  1. #ifndef __TRICKMATH_H
    2. 

  2. #define __TRICKMATH_H
    3. 

  3. 

  4. /**
    5. 

  5.  * @file trickmath.h
    6. 

  6.  * @brief Tricky math include.
    7. 

  7.  */
    8. 

  8. 

  9. /************************************************************************
    10. 

  10.  *      ___                 _            _
    11. 

  11.  * B   / __\__ _ _ __ _ __ (_)_   ____ _| |
    12. 

  12.  * O  / /  / _` | '__| '_ \| \ \ / / _` | |
    13. 

  13.  * O / /__| (_| | |  | | | | |\ V / (_| | |
    14. 

  14.  * M \____/\__,_|_|  |_| |_|_| \_/ \__,_|_|
    15. 

  15.  *
    16. 

  16.  * $Id: $
    17. 

  17.  *
    18. 

  18.  * Authors
    19. 

  19.  *  - Albert Veli
    20. 

  20.  *
    21. 

  21.  * Copyright (C) 2007 Albert Veli
    22. 

  22.  *
    23. 

  23.  * ------------------------------
    24. 

  24.  *
    25. 

  25.  * This file is part of Carnival
    26. 

  26.  *
    27. 

  27.  * Carnival is free software; you can redistribute it and/or modify
    28. 

  28.  * it under the terms of the GNU General Public License as published by
    29. 

  29.  * the Free Software Foundation; either version 3 of the License, or
    30. 

  30.  * (at your option) any later version.
    31. 

  31.  *
    32. 

  32.  * Carnival is distributed in the hope that it will be useful,
    33. 

  33.  * but WITHOUT ANY WARRANTY; without even the implied warranty of
    34. 

  34.  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
    35. 

  35.  * GNU General Public License for more details.
    36. 

  36.  *
    37. 

  37.  * You should have received a copy of the GNU General Public License
    38. 

  38.  * along with this program; if not, write to the Free Software Foundation,
    39. 

  39.  * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
    40. 

  40.  *
    41. 

  41.  ************************************************************************/
    42. 

  42. 

  43. 

  44. /* ----------------------------------------------
    45. 

  45.  * Macros
    46. 

  46.  * ----------------------------------------------
    47. 

  47.  */
    48. 

  48. #define SQRTFAST(x) ((x) * Q_rsqrt(x))
    49. 

  49. 

  50. 

  51. /* ----------------------------------------------
    52. 

  52.  * Exported functions from trickmath.c
    53. 

  53.  * ----------------------------------------------
    54. 

  54.  */
    55. 

  55. 

  56. float Q_rsqrt(float number);
    57. 

  57. inline float u8sin(unsigned char v);
    58. 

  58. inline float u8cos(unsigned char v);
    59. 

  59. inline float u8sinf(float v);
    60. 

  60. inline float u8cosf(float v);
    61. 

  61. 

  62. 

  63. /**
    64. 

  64.  * GNU Emacs settings: K&R with 3 spaces indent.
    65. 

  65.  * Local Variables:
    66. 

  66.  * c-file-style: "k&r"
    67. 

  67.  * c-basic-offset: 3
    68. 

  68.  * indent-tabs-mode: nil
    69. 

  69.  * End:
    70. 

  70.  */
    71. 

  71. 

  72. #endif  /* __TRICKMATH_H */
    73.