-static void mv_yx_in_hex_dir(char d, struct yx_uint8 * yx)
-{
- if (d == 'e')
- {
- yx->x = yx->x + (yx->y % 2);
- yx->y--;
- }
- else if (d == 'd')
- {
- yx->x++;
- }
- else if (d == 'c')
- {
- yx->x = yx->x + (yx->y % 2);
- yx->y++;
- }
- else if (d == 'x')
- {
- yx->x = yx->x - !(yx->y % 2);
- yx->y++;
- }
- else if (d == 's')
- {
- yx->x--;
- }
- else if (d == 'w')
- {
- yx->x = yx->x - !(yx->y % 2);
- yx->y--;
- }
-}
-
-
-
-static uint8_t mv_yx_in_dir_wrap(char d, struct yx_uint8 * yx, uint8_t unwrap)
-{
- static int8_t wrap_west_east = 0;
- static int8_t wrap_north_south = 0;
- if (unwrap)
- {
- wrap_west_east = wrap_north_south = 0;
- return 0;
- }
- struct yx_uint8 original;
- original.y = yx->y;
- original.x = yx->x;
- mv_yx_in_hex_dir(d, yx);
- if (strchr("edc", d) && yx->x < original.x)
- {
- wrap_west_east++;
- }
- else if (strchr("xsw", d) && yx->x > original.x)
- {
- wrap_west_east--;
- }
- if (strchr("we", d) && yx->y > original.y)
- {
- wrap_north_south--;
- }
- else if (strchr("xc", d) && yx->y < original.y)
- {
- wrap_north_south++;
- }
- return (wrap_west_east != 0) + (wrap_north_south != 0);
-}
-
-
-
-static uint8_t mv_yx_in_dir_legal(char dir, struct yx_uint8 * yx)
-{
- uint8_t wraptest = mv_yx_in_dir_wrap(dir, yx, 0);
- if (!wraptest && yx->x < world.map.length && yx->y < world.map.length)
- {
- return 1;
- }
- return 0;
-}
-
-
-