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  1. /*
  2.     This file is part of "Filter Foundry", a filter plugin for Adobe Photoshop
  3.     Copyright (C) 2003-2009 Toby Thain, toby@telegraphics.com.au
  4.     Copyright (C) 2018-2021 Daniel Marschall, ViaThinkSoft
  5.  
  6.     This program is free software; you can redistribute it and/or modify
  7.     it under the terms of the GNU General Public License as published by
  8.     the Free Software Foundation; either version 2 of the License, or
  9.     (at your option) any later version.
  10.  
  11.     This program is distributed in the hope that it will be useful,
  12.     but WITHOUT ANY WARRANTY; without even the implied warranty of
  13.     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14.     GNU General Public License for more details.
  15.  
  16.     You should have received a copy of the GNU General Public License
  17.     along with this program; if not, write to the Free Software
  18.     Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  19. */
  20.  
  21. #include <math.h>
  22.  
  23.  
  24. #ifndef M_PI
  25.         #define M_PI 3.14159265358979323846264338327
  26. #endif
  27.  
  28.  
  29. #include "symtab.h"
  30.  
  31. enum{ COSTABSIZE=1024,TANTABSIZE=512 };
  32.  
  33. void init_trigtab();
  34.  
  35. extern double costab[],tantab[];
  36.  
  37. #define DEG2RAD(x) ((x)*M_PI/180.)
  38. #define RAD2DEG(x) ((x)*180./M_PI)
  39.  
  40. /* [trig functions return] an integer between -512 and 512, inclusive (Windows)
  41.         or -1024 and 1024, inclusive (Mac OS) */
  42. #ifdef WIN_ENV
  43. #define TRIGAMP 512
  44. #else
  45. #define TRIGAMP 1024
  46. #endif
  47. #define FFANGLE(v) ((v)*M_PI/512.)
  48. #define TO_FFANGLE(v) ((v)*512./M_PI)
  49.  
  50. #define INITRANDSEED() srand(691204)
  51.  
  52. value_type ff_src(value_type x,value_type y,value_type z);
  53. value_type ff_rad(value_type d,value_type m,value_type z);
  54. value_type ff_ctl(value_type i);
  55. value_type ff_val(value_type i,value_type a,value_type b);
  56. value_type ff_map(value_type i,value_type n);
  57. value_type ff_min(value_type a,value_type b);
  58. value_type ff_max(value_type a,value_type b);
  59. value_type ff_abs(value_type a);
  60. value_type ff_add(value_type a,value_type b,value_type c);
  61. value_type ff_sub(value_type a,value_type b,value_type c);
  62. value_type ff_dif(value_type a,value_type b);
  63. value_type ff_rnd(value_type a,value_type b);
  64. value_type ff_mix(value_type a,value_type b,value_type n,value_type d);
  65. value_type ff_scl(value_type a,value_type il,value_type ih,
  66.                                   value_type ol,value_type oh);
  67. value_type ff_sqr(value_type x);
  68. value_type ff_sin(value_type x);
  69. value_type ff_cos(value_type x);
  70. value_type ff_tan(value_type x);
  71. value_type ff_r2x(value_type d,value_type m);
  72. value_type ff_r2y(value_type d,value_type m);
  73. value_type ff_c2d(value_type d, value_type m);
  74. value_type ff_c2d_negated(value_type d, value_type m); // not a function!
  75. value_type ff_c2m(value_type d,value_type m);
  76. value_type ff_get(value_type i);
  77. value_type ff_put(value_type v,value_type i);
  78. value_type ff_cnv(value_type m11,value_type m12,value_type m13,
  79.                                   value_type m21,value_type m22,value_type m23,
  80.                                   value_type m31,value_type m32,value_type m33,
  81.                                   value_type d );
  82. value_type ff_rst(value_type seed);
  83.