X-Git-Url: https://plomlompom.com/repos/?a=blobdiff_plain;f=src%2Fserver%2Fai.c;h=d099c5748ce2d69ca6df26e3652d9141532d787c;hb=639a12151eeb7ce0d18de330b4bb8d9d8094c4d3;hp=50c5031018810d5baca6348299e394ae5329cb98;hpb=e03020342a74aef143b1ec38c18966dac64181b5;p=plomrogue diff --git a/src/server/ai.c b/src/server/ai.c index 50c5031..d099c57 100644 --- a/src/server/ai.c +++ b/src/server/ai.c @@ -3,95 +3,91 @@ #include "ai.h" #include /* NULL */ #include /* uint8_t, uint16_t, uint32_t, UINT16_MAX */ +#include /* free() */ +#include "../common/try_malloc.h" /* try_malloc() */ +#include "field_of_view.h" /* build_fov_map() */ #include "map_object_actions.h" /* get_moa_id_by_name() */ #include "map_objects.h" /* struct MapObj */ #include "world.h" /* global world */ -#define N_DIRS 8 +#define N_DIRS 6 -/* Write into "neighbors" scores of the eight immediate 2D neighbors of the - * "score_map" cell at "pos_i" (array index), as found in the directions north, - * north-east, east etc. (clockwise order). "max_score" is used for illegal - * neighborhoods (i.e. if the direction would lead beyond the map's border). +/* Write into "neighbors" scores of the N_DIRS immediate neighbors of the + * "score_map" cell at "pos_i" (array index), as found in the directions + * north-east, east, south-east etc. (clockwise order). Use "max_score" for + * illegal neighborhoods (i.e. if direction would lead beyond the map's border). */ -static void get_neighbor_scores(uint32_t * score_map, uint16_t pos_i, - uint32_t max_score, uint32_t * neighbors); +static void get_neighbor_scores(uint16_t * score_map, uint16_t pos_i, + uint16_t max_score, uint16_t * neighbors); -/* Iterate over scored cells in "score_map" of world.map's 2D geometry. Compare +/* Iterate over scored cells in "score_map" of world.map's geometry. Compare * each cell's score against the score of its immediate neighbors in N_DIRS * directions. If it's neighbors are low enough that the result would be lower - * than the current value, re-set it to world.map.dist_orthogonal points higher - * than its lowest-scored orthogonal neighbor or world.map.dist_diagonal points - * higher than its lowest-scored diagonal neighbor (whatever would result in a - * lower value). Repeat this whole process until all cells have settled on their + * than the current value, re-set it to 1 point higher than its lowest-scored + * neighbor. Repeat this whole process until all cells have settled on their * final score. Ignore cells whose position in "score_map" fits cells of - * unreachable terrain in world.map.cells. Expect "max_score" to be the maximum - * score for cells, marking them as unreachable. + * unreachable terrain in world.map.cells or whose score is greater than + * "max_score". Expect "max_score" to be the maximum score for cells, marking + * them as unreachable. */ -static void dijkstra_map(uint32_t * score_map, uint32_t max_score); +static void dijkstra_map(uint16_t * score_map, uint16_t max_score); /* Return numpad char of direction ("8", "6", "2", "4" etc.) of enemy with the - * shortest path to "mo_origin". If no enemy is around, return 0. + * shortest path visible to "mo_origin". If no enemy is around, return 0. */ static char get_dir_to_nearest_enemy(struct MapObj * mo_origin); -static void get_neighbor_scores(uint32_t * score_map, uint16_t pos_i, - uint32_t max_score, uint32_t * neighbors) +static void get_neighbor_scores(uint16_t * score_map, uint16_t pos_i, + uint16_t max_score, uint16_t * neighbors) { - uint16_t map_size = world.map.size.y * world.map.size.x; + uint32_t map_size = world.map.size.y * world.map.size.x; uint8_t i_dir; for (i_dir = 0; i_dir < N_DIRS; neighbors[i_dir] = max_score, i_dir++); - uint8_t open_north = pos_i >= world.map.size.x; - uint8_t open_east = pos_i + 1 % world.map.size.x; - uint8_t open_south = pos_i + world.map.size.x < map_size; - uint8_t open_west = pos_i % world.map.size.x; - if (open_north) + uint8_t open_north = pos_i >= world.map.size.x; + uint8_t open_east = pos_i + 1 % world.map.size.x; + uint8_t open_south = pos_i + world.map.size.x < map_size; + uint8_t open_west = pos_i % world.map.size.x; + uint8_t is_indented = (pos_i / world.map.size.x) % 2; + uint8_t open_diag_west = is_indented || open_west; + uint8_t open_diag_east = !is_indented || open_east; + if (open_north && open_diag_east) { - neighbors[0] = score_map[pos_i - world.map.size.x]; - } - if (open_north && open_east) - { - neighbors[1] = score_map[pos_i - world.map.size.x + 1]; + neighbors[0] = score_map[pos_i - world.map.size.x + is_indented]; } if (open_east) { - neighbors[2] = score_map[pos_i + 1]; - } - if (open_east && open_south) - { - neighbors[3] = score_map[pos_i + 1 + world.map.size.x]; + neighbors[1] = score_map[pos_i + 1]; } - if (open_south) + if (open_south && open_diag_east) { - neighbors[4] = score_map[pos_i + world.map.size.x]; + neighbors[2] = score_map[pos_i + world.map.size.x + is_indented]; } - if (open_south && open_west) + if (open_south && open_diag_west) { - neighbors[5] = score_map[pos_i + world.map.size.x - 1]; + neighbors[3] = score_map[pos_i + world.map.size.x - !is_indented]; } if (open_west) { - neighbors[6] = score_map[pos_i - 1]; + neighbors[4] = score_map[pos_i - 1]; } - if (open_west && open_north) + if (open_north && open_diag_west) { - neighbors[7] = score_map[pos_i - 1 - world.map.size.x]; + neighbors[5] = score_map[pos_i - world.map.size.x - !is_indented]; } } -static void dijkstra_map(uint32_t * score_map, uint32_t max_score) +static void dijkstra_map(uint16_t * score_map, uint16_t max_score) { - uint32_t i_scans, neighbors[N_DIRS], min_neighbor_o, min_neighbor_d; - uint16_t map_size = world.map.size.y * world.map.size.x; - uint16_t pos; + uint32_t map_size = world.map.size.y * world.map.size.x; + uint16_t pos, i_scans, neighbors[N_DIRS], min_neighbor; uint8_t scores_still_changing = 1; uint8_t i_dirs; for (i_scans = 0; scores_still_changing; i_scans++) @@ -99,30 +95,20 @@ static void dijkstra_map(uint32_t * score_map, uint32_t max_score) scores_still_changing = 0; for (pos = 0; pos < map_size; pos++) { - if ('.' == world.map.cells[pos]) + if ('.' == world.map.cells[pos] && score_map[pos] <= max_score) { get_neighbor_scores(score_map, pos, max_score, neighbors); - min_neighbor_d = max_score; - min_neighbor_o = max_score; + min_neighbor = max_score; for (i_dirs = 0; i_dirs < N_DIRS; i_dirs++) { - if (!(i_dirs % 2) && min_neighbor_o > neighbors[i_dirs]) + if (min_neighbor > neighbors[i_dirs]) { - min_neighbor_o = neighbors[i_dirs]; + min_neighbor = neighbors[i_dirs]; } - else if (i_dirs % 2 && min_neighbor_d > neighbors[i_dirs]) - { - min_neighbor_d = neighbors[i_dirs]; - } - } - if (score_map[pos] > min_neighbor_o + world.map.dist_orthogonal) - { - score_map[pos] = min_neighbor_o + world.map.dist_orthogonal; - scores_still_changing = 1; } - if (score_map[pos] > min_neighbor_d + world.map.dist_diagonal) + if (score_map[pos] > min_neighbor + 1) { - score_map[pos] = min_neighbor_d + world.map.dist_diagonal; + score_map[pos] = min_neighbor + 1; scores_still_changing = 1; } } @@ -134,18 +120,29 @@ static void dijkstra_map(uint32_t * score_map, uint32_t max_score) static char get_dir_to_nearest_enemy(struct MapObj * mo_origin) { - /* Calculate for each cell the distance to the nearest map actor that is - * not "mo_origin", with movement only possible in the directions of "dir". + char * f_name = "get_dir_to_nearest_enemy()"; + + /* Calculate for each cell the distance to the visibly nearest map actor not + * "mo_origin", with movement only possible in the directions of "dir". * (Actors' own cells start with a distance of 0 towards themselves.) */ - uint16_t map_size = world.map.size.y * world.map.size.x; - uint32_t max_score = UINT32_MAX - (world.map.dist_diagonal + 1); - uint32_t score_map[map_size]; + uint32_t map_size = world.map.size.y * world.map.size.x; + uint16_t max_score = UINT16_MAX - 1; + uint16_t * score_map = try_malloc(map_size * sizeof(uint16_t), f_name); + uint8_t * fov_map = world.enemy_fov ? build_fov_map(mo_origin) : NULL; uint32_t i; for (i = 0; i < map_size; i++) { - score_map[i] = max_score; + if (world.enemy_fov) + { + score_map[i] = fov_map[i] & VISIBLE ? max_score : UINT16_MAX; + } + else + { + score_map[i] = max_score; + } } + free(fov_map); struct MapObj * mo = world.map_objs; for (; mo != NULL; mo = mo->next) { @@ -158,12 +155,13 @@ static char get_dir_to_nearest_enemy(struct MapObj * mo_origin) dijkstra_map(score_map, max_score); /* Return direction of "mo_origin"'s lowest-scored neighbor cell. */ - uint32_t neighbors[N_DIRS]; + uint16_t neighbors[N_DIRS]; uint16_t pos_i = (mo_origin->pos.y * world.map.size.x) + mo_origin->pos.x; get_neighbor_scores(score_map, pos_i, max_score, neighbors); + free(score_map); char dir_to_nearest_enemy = 0; - uint32_t min_neighbor = max_score; - char * dirs = "89632147"; /* get_neighbor_scores()'s clockwise dir order.*/ + uint16_t min_neighbor = max_score; + char * dirs = "edcxsw"; /* get_neighbor_scores()'s clockwise dir order.*/ for (i = 0; i < N_DIRS; i++) { if (min_neighbor > neighbors[i])