X-Git-Url: https://plomlompom.com/repos/?a=blobdiff_plain;f=src%2Fserver%2Fai.c;h=ae56cdb4e11c52ce43ea34ef97c82e8907143d0d;hb=bf396f111317663bba3950e57968af19f2f56a44;hp=96e7ac35463ec562a95de8d9757fc6090d74772b;hpb=dd9d65ee727ac7e95801da0f8b5bae7009811802;p=plomrogue

diff --git a/src/server/ai.c b/src/server/ai.c
index 96e7ac3..ae56cdb 100644
--- a/src/server/ai.c
+++ b/src/server/ai.c
@@ -1,115 +1,343 @@
-/* src/server/ai.c */
+/* src/server/ai.c
+ *
+ * This file is part of PlomRogue. PlomRogue is licensed under the GPL version 3
+ * or any later version. For details on its copyright, license, and warranties,
+ * see the file NOTICE in the root directory of the PlomRogue source package.
+ */
 
 #include "ai.h"
-#include <stdint.h> /* uint8_t, uint16_t */
+#include <stdint.h> /* uint8_t, uint16_t, uint32_t, int16_t, UINT16_MAX */
 #include <stdlib.h> /* free() */
-#include <string.h> /* strlen(), memset() */
 #include "../common/try_malloc.h" /* try_malloc() */
-#include "../common/yx_uint16.h" /* struct yx_uint16 */
-#include "map_object_actions.h" /* get_moa_id_by_name() */
-#include "map_objects.h" /* struct MapObj */
-#include "world.h" /* global world */
-#include "yx_uint16.h" /* yx_uint16_cmp(), mv_yx_in_dir() */
+#include "hardcoded_strings.h" /* s */
+#include "thing_actions.h" /* get_thing_action_id_by_name() */
+#include "things.h" /* Thing, ThingType, ThingInMemory */
+#include "world.h" /* world */
+
+
+
+#define N_DIRS 6
+
+
+
+/* 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(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 geometry. Compare
+ * each cell's score against the score of its immediate neighbors in N_DIRS
+ * directions. If any neighbor's score is at least two points lower than the
+ * current cell's score, 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 score is greater than "max_score". Expect
+ * "max_score" to be the maximum score for cells, marking them as unreachable.
+ */
+static void dijkstra_map(uint16_t * score_map, uint16_t max_score);
 
+/* get_dir_to_nearest_target() helper: Prepare "score_map" for dijkstra_map(). */
+static void init_score_map(char filter, uint16_t * score_map, uint32_t map_size,
+                           struct Thing * t_eye);
 
+/* Set (if possible) as "t_eye"'s command a move to the path to the path-wise
+ * nearest target that is not "t_eye" and fits criteria set by "filter". On
+ * success, return !0, else 0. Values for "filter":
+ * "e": thing in FOV is animate, but not of "t_eye"'s thing type; build path as
+ *      avoiding things of "t_eye"'s type
+ * "c": thing in memorized map is consumable
+ * "s": memory map cell with greatest-reachable degree of unexploredness
+ */
+static uint8_t get_dir_to_nearest_target(struct Thing * t_eye, char filter);
 
-/* Change cardinal direction string ("NNE" etc.) of any length >1 pointed to by
- * "path_ptr" one step clockwise ("NNE" -> "NEE", "NEE" -> "EEE" etc.).
+/* Return 1 if any thing not "t_eye" is known and fulfills some criteria defined
+ * by "filter", else 0. Values for "filter":
+ * "e": thing in FOV is animate, but not of "t_eye"'s thing type
+ * "c": thing in memorized map is consumable
  */
-static void clockwise_path(char ** path_ptr);
+static uint8_t seeing_thing(struct Thing * t_eye, char filter);
 
-/* Return dir char (north = "N" etc.) to enemy nearest to "origin" (beeline). */
-static char nearest_enemy_dir(struct yx_uint16 origin);
+/* Return slot ID of strongest consumable in "t_owner"'s inventory, else -1. */
+static int16_t get_inventory_slot_to_consume(struct Thing * t_owner);
 
+/* Return 1 if "t_standing" is standing on a consumable, else 0. */
+static uint8_t standing_on_consumable(struct Thing * t_standing);
 
 
-static void clockwise_path(char ** path_ptr)
+
+static void get_neighbor_scores(uint16_t * score_map, uint16_t pos_i,
+                                uint16_t max_score, uint16_t * neighbors)
 {
-    char * path = * path_ptr;
-    char old_char = path[0];
-    char new_char = 'N';
-    if      ('N' == old_char)
+    uint32_t map_size = world.map.length * world.map.length;
+    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.length;
+    uint8_t open_east      = pos_i + 1 % world.map.length;
+    uint8_t open_south     = pos_i + world.map.length < map_size;
+    uint8_t open_west      = pos_i % world.map.length;
+    uint8_t is_indented    = (pos_i / world.map.length) % 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.length + is_indented];
+    }
+    if (open_east)
     {
-        new_char = 'E';
+        neighbors[1] = score_map[pos_i + 1];
     }
-    else if ('E' == old_char)
+    if (open_south && open_diag_east)
     {
-        new_char = 'S';
+        neighbors[2] = score_map[pos_i + world.map.length + is_indented];
     }
-    else if ('S' == old_char)
+    if (open_south && open_diag_west)
     {
-        new_char = 'W';
+        neighbors[3] = score_map[pos_i + world.map.length - !is_indented];
     }
-    uint8_t len = strlen(path);
-    uint8_t i = 0;
-    for (; i < len; i++)
+    if (open_west)
     {
-        uint8_t next_i = i + 1;
-        if (next_i == len || old_char != path[next_i])
+        neighbors[4] = score_map[pos_i - 1];
+    }
+    if (open_north && open_diag_west)
+    {
+        neighbors[5] = score_map[pos_i - world.map.length - !is_indented];
+    }
+}
+
+
+
+static void dijkstra_map(uint16_t * score_map, uint16_t max_score)
+{
+    uint32_t map_size = world.map.length * world.map.length;
+    uint32_t pos;
+    uint16_t 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++)
+    {
+        scores_still_changing = 0;
+        for (pos = 0; pos < map_size; pos++)
         {
-            break;
+            if (score_map[pos] <= max_score)
+            {
+                get_neighbor_scores(score_map, pos, max_score, neighbors);
+                min_neighbor = max_score;
+                for (i_dirs = 0; i_dirs < N_DIRS; i_dirs++)
+                {
+                    if (min_neighbor > neighbors[i_dirs])
+                    {
+                        min_neighbor = neighbors[i_dirs];
+                    }
+                }
+                if (score_map[pos] > min_neighbor + 1)
+                {
+                    score_map[pos] = min_neighbor + 1;
+                    scores_still_changing = 1;
+                }
+            }
         }
     }
-    path[i] = new_char;
 }
 
 
 
-static char nearest_enemy_dir(struct yx_uint16 origin)
+static void init_score_map(char filter, uint16_t * score_map, uint32_t map_size,
+                           struct Thing * t_eye)
 {
-    char * f_name = "nearest_enemy_dir()";
-    struct MapObj * mo;
-    char sel = 0;
-    uint16_t dist_max = world.map.size.y;
-    if (world.map.size.x > world.map.size.y)
-    {
-        dist_max = world.map.size.x;
-    }
-    uint8_t escape = 0;
-    uint8_t dist, j;
-    uint16_t i;
-    for (dist = 1; !escape && dist <= dist_max; dist++)
-    {
-        char * path = try_malloc(dist + 1, f_name);
-        memset(path, 'N', dist);
-        path[dist] = '\0';
-        for (i = 0; !escape && i < (dist * 4); i++)
+    uint32_t i;
+    for (i = 0; i < map_size; i++)
+    {
+        score_map[i] = UINT16_MAX;
+        if ('.' == t_eye->mem_map[i])
+        {
+            score_map[i] = UINT16_MAX-1;
+        }
+    }
+    if      ('e' == filter)
+    {
+        struct Thing * t = world.things;
+        for (; t; t = t->next)
         {
-            clockwise_path(&path);
-            struct yx_uint16 testpos = origin;
-            for (j = 0; j < dist; j++)
+            if (   t==t_eye || !t->lifepoints
+                || 'H' == t_eye->fov_map[t->pos.y*world.map.length + t->pos.x])
             {
-                testpos = mv_yx_in_dir(path[j], testpos);
+                continue;
+            }
+            else if (t->lifepoints && t->type == t_eye->type)
+            {
+                score_map[t->pos.y * world.map.length + t->pos.x] = UINT16_MAX;
+                continue;
             }
-            if (yx_uint16_cmp(&testpos, &origin) ||
-                testpos.y > world.map.size.y || testpos.x > world.map.size.x)
+            score_map[t->pos.y * world.map.length + t->pos.x] = 0;
+        }
+    }
+    else if ('c' == filter)
+    {
+        struct ThingInMemory * tm = t_eye->t_mem;
+        for (; tm; tm = tm->next)
+        {
+            if (' ' == t_eye->mem_map[tm->pos.y * world.map.length + tm->pos.x])
             {
                 continue;
             }
-            for (mo = world.map_objs; mo != 0; mo = mo->next)
+            struct ThingType * tt = get_thing_type(tm->type);
+            if (!tt->consumable)
             {
-                if (mo->lifepoints && 1 == yx_uint16_cmp(&testpos, &mo->pos))
+                continue;
+            }
+            score_map[tm->pos.y * world.map.length + tm->pos.x] = 0;
+        }
+    }
+    else if (('0' < filter && '9' >= filter) || ' ' == filter)
+    {
+        uint32_t i;
+        for (i = 0; i < (uint32_t) (world.map.length * world.map.length); i++)
+        {
+            score_map[i] = filter == t_eye->mem_depth_map[i] ? 0 : score_map[i];
+        }
+    }
+}
+
+
+
+static uint8_t get_dir_to_nearest_target(struct Thing * t_eye, char filter)
+{
+    char dir_to_nearest_target = 0;
+    uint8_t run_i = 9 /* maximum mem depth age below never-explored */ + 1;
+    uint8_t mem_depth_char = ' ';
+    while (run_i && ('s' == filter || seeing_thing(t_eye, filter)))
+    {
+        run_i = 's' != filter ? 0 : run_i - 1;
+        uint32_t map_size = world.map.length * world.map.length;
+        uint16_t * score_map = try_malloc(map_size * sizeof(uint16_t),__func__);
+        init_score_map('s' == filter ? mem_depth_char : filter,
+                       score_map, map_size, t_eye);
+        mem_depth_char = ' ' == mem_depth_char ? '9' : mem_depth_char - 1;
+        dijkstra_map(score_map, UINT16_MAX-1);
+        uint16_t neighbors[N_DIRS];
+        uint16_t pos_i = (t_eye->pos.y * world.map.length) + t_eye->pos.x;
+        get_neighbor_scores(score_map, pos_i, UINT16_MAX-1, neighbors);
+        free(score_map);
+        uint16_t min_neighbor = UINT16_MAX-1;
+        char * dirs = "edcxsw";/* get_neighbor_scores()'s clockwise dir order.*/
+        uint8_t i;
+        for (i = 0; i < N_DIRS; i++)
+        {
+            if (min_neighbor > neighbors[i])
+            {
+                min_neighbor = neighbors[i];
+                dir_to_nearest_target = dirs[i];
+            }
+        }
+        if (dir_to_nearest_target)
+        {
+            t_eye->command = get_thing_action_id_by_name(s[S_CMD_MOVE]);
+            t_eye->arg = dir_to_nearest_target;
+            run_i = 0;
+        }
+    }
+    return dir_to_nearest_target;
+}
+
+
+
+static uint8_t seeing_thing(struct Thing * t_eye, char filter)
+{
+    if (t_eye->fov_map && 'e' == filter)
+    {
+        struct Thing * t = world.things;
+        for (; t; t = t->next)
+        {
+            if (   t != t_eye
+                && 'v' == t_eye->fov_map[t->pos.y*world.map.length + t->pos.x])
+            {
+                if (t->lifepoints && t->type != t_eye->type)
+                {
+                    return 1;
+                }
+            }
+        }
+    }
+    else if (t_eye->mem_map && 'c' == filter)
+    {
+        struct ThingInMemory * tm = t_eye->t_mem;
+        for (; tm; tm = tm->next)
+        {
+            if (' ' != t_eye->mem_map[tm->pos.y * world.map.length + tm->pos.x])
+            {
+                struct ThingType * tt = get_thing_type(tm->type);
+                if (tt->consumable)
                 {
-                    sel = path[0];
-                    escape = 1;
-                    break;
+                    return 1;
                 }
             }
         }
-        free(path);
     }
-    return sel;
+    return 0;
 }
 
 
 
-extern void pretty_dumb_ai(struct MapObj * mo)
+static int16_t get_inventory_slot_to_consume(struct Thing * t_owner)
 {
-    mo->command = get_moa_id_by_name("wait");
-    char sel = nearest_enemy_dir(mo->pos);
-    if (0 != sel)
+    uint8_t compare_consumability = 0;
+    int16_t selection = -1;
+    struct Thing * t = t_owner->owns;;
+    uint8_t i;
+    for (i = 0; t; t = t->next, i++)
     {
-        mo->command = get_moa_id_by_name("move");
-        mo->arg = sel;
+        struct ThingType * tt = get_thing_type(t->type);
+        if (tt->consumable > compare_consumability)
+        {
+            compare_consumability = tt->consumable;
+            selection = i;
+        }
+    }
+    return selection;
+}
+
+
+
+static uint8_t standing_on_consumable(struct Thing * t_standing)
+{
+    struct Thing * t = world.things;
+    for (; t; t = t->next)
+    {
+        if (   t != t_standing
+            && t->pos.y == t_standing->pos.y && t->pos.x == t_standing->pos.x)
+        {
+            struct ThingType * tt = get_thing_type(t->type);
+            if (tt->consumable)
+            {
+                return 1;
+            }
+        }
+    }
+    return 0;
+}
+
+
+
+extern void ai(struct Thing * t)
+{
+    t->command = get_thing_action_id_by_name(s[S_CMD_WAIT]);
+    if (!get_dir_to_nearest_target(t, 'e'))
+    {
+        int16_t sel = get_inventory_slot_to_consume(t);
+        if (-1 != sel)
+        {
+            t->command = get_thing_action_id_by_name(s[S_CMD_USE]);
+            t->arg = (uint8_t) sel;
+        }
+        else if (standing_on_consumable(t))
+        {
+            t->command = get_thing_action_id_by_name(s[S_CMD_PICKUP]);
+        }
+        else if (!get_dir_to_nearest_target(t, 'c'))
+        {
+            get_dir_to_nearest_target(t, 's');
+        }
     }
 }