root/ext/gd/libgd/mathmake.c

DEFINITIONS

1. main

   1 #include <stdio.h>
   2 #include <math.h>
   3 
   4 #define scale 1024
   5 
   6 int basis[91];
   7 int cost[360];
   8 
   9 main (void)
  10 {
  11   int i;
  12   printf ("#define costScale %d\n", scale);
  13   printf ("int cost[] = {\n  ");
  14   for (i = 0; (i <= 90); i++)
  15     {
  16       basis[i] = cos ((double) i * .0174532925) * scale;
  17     }
  18   for (i = 0; (i < 90); i++)
  19     {
  20       printf ("%d,\n  ", cost[i] = basis[i]);
  21     }
  22   for (i = 90; (i < 180); i++)
  23     {
  24       printf ("%d,\n  ", cost[i] = -basis[180 - i]);
  25     }
  26   for (i = 180; (i < 270); i++)
  27     {
  28       printf ("%d,\n  ", cost[i] = -basis[i - 180]);
  29     }
  30   for (i = 270; (i < 359); i++)
  31     {
  32       printf ("%d,\n  ", cost[i] = basis[360 - i]);
  33     }
  34   printf ("%d\n", cost[359] = basis[1]);
  35   printf ("};\n");
  36   printf ("#define sintScale %d\n", scale);
  37   printf ("int sint[] = {\n  ");
  38   for (i = 0; (i < 360); i++)
  39     {
  40       int val;
  41       val = cost[(i + 270) % 360];
  42       if (i != 359)
  43         {
  44           printf ("%d,\n  ", val);
  45         }
  46       else
  47         {
  48           printf ("%d\n", val);
  49         }
  50     }
  51   printf ("};\n");
  52 }