git.mutantstargoat.com Git - dos_low3d/blob - tools/genlut.c

   1 #include <stdio.h>\r
   2 #include <math.h>\r
   3 \r
   4 #define SINTAB_SIZE             512\r
   5 #define SINTAB_SCALE    8192\r
   6 \r
   7 int main(void)\r
   8 {\r
   9         int i, len;\r
  10 \r
  11         printf("\tbits 32\n");\r
  12         printf("\tsection .rodata\n\n");\r
  13 \r
  14         printf("\tglobal _sintab\n");\r
  15         printf("_sintab:\n");\r
  16 \r
  17         fputs("\tdw", stdout);\r
  18         len = 10;\r
  19         for(i=0; i<SINTAB_SIZE; i++) {\r
  20                 double theta = (double)i / (double)SINTAB_SIZE * 6.28318530718;\r
  21                 double sf = sin(theta);\r
  22                 int sx = (int)(sf * SINTAB_SCALE);\r
  23                 len += printf(" %d", sx);\r
  24                 if(len >= 72) {\r
  25                         putchar('\n');\r
  26                         if(i < SINTAB_SIZE - 1) {\r
  27                                 fputs("\tdw", stdout);\r
  28                                 len = 10;\r
  29                         }\r
  30                 } else {\r
  31                         putchar(',');\r
  32                         len++;\r
  33                 }\r
  34         }\r
  35         printf("\n\n; vi:ft=nasm ts=8 sts=8 sw=8:\n");\r
  36         return 0;\r
  37 }\r