#include <string.h> /* memset() */
#include "../common/rexit.h" /* exit_trouble() */
#include "../common/try_malloc.h" /* try_malloc() */
+#include "../common/yx_uint8.h" /* yx_uint8 */
+#include "map.h" /* mv_yx_in_dir_legal() */
#include "things.h" /* Thing, ThingInMemory, add_thing_to_memory_map() */
-#include "yx_uint8.h" /* yx_uint8 */
+#include "yx_uint8.h" /* mv_yx_in_dir_wrap(), */
#include "world.h" /* world */
-/* Move "yx" into hex direction "d". */
-static void mv_yx_in_hex_dir(char d, struct yx_uint8 * yx);
-
-/* Move "yx" into hex direction "d". If this moves "yx" beyond the minimal (0)
- * or maximal (UINT8_MAX) column or row, it wraps to the opposite side. Such
- * wrapping is returned as a wraps enum value and stored, so that further calls
- * to move "yx" back into the opposite direction may unwrap it again. Pass an
- * "unwrap" of !0 to re-set the internal wrap memory to 0.
- */
-static uint8_t mv_yx_in_dir_wrap(char d, struct yx_uint8 * yx, uint8_t unwrap);
-
-/* Wrapper to mv_yx_in_dir_wrap(), returns 1 if the wrapped function moved "yx"
- * within the wrap borders and the map size, else 0.
- */
-static uint8_t mv_yx_in_dir_legal(char dir, struct yx_uint8 * yx);
-
/* Recalculate angle < 0 or > CIRCLE to a value between these two limits. */
static uint32_t correct_angle(int32_t angle);
-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;
-}
-
-
-
static uint32_t correct_angle(int32_t angle)
{
while (angle < 0)
struct ThingInMemory * tm = t_eye->t_mem;
struct ThingInMemory * tm_prev = NULL;
struct ThingInMemory * tm_next = NULL;
- for (; tm != NULL; tm = tm_next)
+ for (; tm; tm = tm_next)
{
tm_next = tm->next;
if ('v' == t_eye->fov_map[tm->pos.y * world.map.length + tm->pos.x])
tm_prev = tm;
}
struct Thing * t = world.things;
- for (; t != NULL; t = t->next)
+ for (; t; t = t->next)
{
if ( !t->lifepoints
&& 'v' == t_eye->fov_map[t->pos.y * world.map.length + t->pos.x])
uint32_t map_size = world.map.length * world.map.length;
t->fov_map = t->fov_map ? t->fov_map : try_malloc(map_size, __func__);
memset(t->fov_map, 'v', map_size);
- struct yx_uint8 test_pos = t->pos;
struct shadow_angle * shadows = NULL;
+ struct yx_uint8 test_pos = t->pos;
char * circle_dirs = "xswedc";
uint16_t dist;
- uint8_t first_round, circle_on_map;
- for (first_round = 1, dist = 1, circle_on_map = 1; circle_on_map; dist++)
+ uint8_t circle_on_map;
+ for (dist = 1, circle_on_map = 1; circle_on_map; dist++)
{
- if (!first_round)
+ if (1 != dist)
{
mv_yx_in_dir_legal('c', &test_pos);
}
char dir = 'd';
- uint8_t i_dir = first_round = circle_on_map = 0;
+ uint8_t i_dir = circle_on_map = 0;
uint16_t i_dist, hex_i;
for (hex_i = 0, i_dist = 1; hex_i < 6 * dist; i_dist++, hex_i++)
{