X-Git-Url: https://plomlompom.com/repos/?a=blobdiff_plain;f=src%2Fserver%2Ffield_of_view.c;h=f14fffd1c11b090057dd707d94f93ec6383d2508;hb=c8841380b53dbd999061a8de399e71d5d8272fb0;hp=1a9acd588654f6d44b523ff18180a2201493fab9;hpb=61d2bf27904c05c2bb6dd68bd83cab9bba9c9385;p=plomrogue

diff --git a/src/server/field_of_view.c b/src/server/field_of_view.c
index 1a9acd5..f14fffd 100644
--- a/src/server/field_of_view.c
+++ b/src/server/field_of_view.c
@@ -84,6 +84,9 @@ static void eval_position(uint16_t dist, uint16_t hex_i, uint8_t * fov_map,
                           struct yx_uint8 * test_pos,
                           struct shadow_angle ** shadows);
 
+/* Update "t"'s .mem_map memory with what's in its current field of view. */
+static void update_map_memory(struct Thing * t, uint32_t map_size);
+
 
 
 static void mv_yx_in_hex_dir(char d, struct yx_uint8 * yx)
@@ -327,12 +330,31 @@ static void eval_position(uint16_t dist, uint16_t hex_i, uint8_t * fov_map,
 
 
 
-extern uint8_t * build_fov_map(struct Thing * eye)
+static void update_map_memory(struct Thing * t, uint32_t map_size)
+{
+    if (!t->mem_map)
+    {
+        t->mem_map = try_malloc(map_size, __func__);
+        memset(t->mem_map, ' ', map_size);
+    }
+    uint32_t i;
+    for (i = 0; i < map_size; i++)
+    {
+        if (' ' == t->mem_map[i] && t->fov_map[i] & VISIBLE)
+        {
+            t->mem_map[i] = world.map.cells[i];
+        }
+    }
+}
+
+
+
+extern void build_fov_map(struct Thing * t)
 {
     uint32_t map_size = world.map.length * world.map.length;
-    uint8_t * fov_map = try_malloc(map_size, __func__);
-    memset(fov_map, VISIBLE, map_size);
-    struct yx_uint8 test_pos = eye->pos;
+    t->fov_map = t->fov_map ? t->fov_map : try_malloc(map_size, __func__);
+    memset(t->fov_map, VISIBLE, map_size);
+    struct yx_uint8 test_pos = t->pos;
     struct shadow_angle * shadows = NULL;
     char * circle_dirs = "xswedc";
     uint16_t dist;
@@ -350,7 +372,7 @@ extern uint8_t * build_fov_map(struct Thing * eye)
         {
             if (mv_yx_in_dir_legal(dir, &test_pos))
             {
-                eval_position(dist, hex_i, fov_map, &test_pos, &shadows);
+                eval_position(dist, hex_i, t->fov_map, &test_pos, &shadows);
                 circle_on_map = 1;
             }
             dir = circle_dirs[i_dir];
@@ -363,5 +385,5 @@ extern uint8_t * build_fov_map(struct Thing * eye)
     }
     mv_yx_in_dir_wrap(0, NULL, 1);
     free_angles(shadows);
-    return fov_map;
+    update_map_memory(t, map_size);
 }