[Feature] #38635 酸の川と毒の川実装。 / Implement acid and poisonous river.

diff --git a/src/floor-generate.c b/src/floor-generate.c
index 77b11d3..fb33ba0 100644 (file)
--- a/src/floor-generate.c
+++ b/src/floor-generate.c
@@ -711,20 +711,43 @@ static bool cave_gen(void)
                /* Hack -- Add some rivers */
                if (one_in_(3) && (randint1(dun_level) > 5))
                {
-                       IDX feat1 = 0, feat2 = 0;
+                       FEAT_IDX feat1 = 0, feat2 = 0;
 
-                       /* Choose water or lava */
+                       /* Choose water mainly */
                        if ((randint1(MAX_DEPTH * 2) - 1 > dun_level) && (d_info[dungeon_type].flags1 & DF1_WATER_RIVER))
                        {
                                feat1 = feat_deep_water;
                                feat2 = feat_shallow_water;
                        }
-                       else if  (d_info[dungeon_type].flags1 & DF1_LAVA_RIVER)
+                       else /* others */
                        {
-                               feat1 = feat_deep_lava;
-                               feat2 = feat_shallow_lava;
+                               FEAT_IDX select_deep_feat[10];
+                               FEAT_IDX select_shallow_feat[10];
+                               int select_id_max = 0, selected;
+
+                               if (d_info[dungeon_type].flags1 & DF1_LAVA_RIVER)
+                               {
+                                       select_deep_feat[select_id_max] = feat_deep_lava;
+                                       select_shallow_feat[select_id_max] = feat_shallow_lava;
+                                       select_id_max++;
+                               }
+                               if (d_info[dungeon_type].flags1 & DF1_POISONOUS_RIVER)
+                               {
+                                       select_deep_feat[select_id_max] = feat_deep_poisonous_puddle;
+                                       select_shallow_feat[select_id_max] = feat_shallow_poisonous_puddle;
+                                       select_id_max++;
+                               }
+                               if (d_info[dungeon_type].flags1 & DF1_ACID_RIVER)
+                               {
+                                       select_deep_feat[select_id_max] = feat_deep_acid_puddle;
+                                       select_shallow_feat[select_id_max] = feat_shallow_acid_puddle;
+                                       select_id_max++;
+                               }
+
+                               selected = randint1(select_id_max);
+                               feat1 = select_deep_feat[selected];
+                               feat2 = select_shallow_feat[selected];
                        }
-                       else feat1 = 0;
 
                        if (feat1)
                        {