1 files changed, 62 insertions, 0 deletions
diff --git a/src/dungeon_ai_targeting.c b/src/dungeon_ai_targeting.c
new file mode 100644
index 0000000..ec5abd9
--- /dev/null
+++ b/src/dungeon_ai_targeting.c
@@ -0,0 +1,62 @@
+#include "global.h"
+#include "dungeon_ai_targeting.h"
+
+#include "constants/iq_skill.h"
+#include "constants/item.h"
+#include "constants/status.h"
+#include "dungeon_engine.h"
+#include "dungeon_items.h"
+#include "dungeon_map_access.h"
+#include "dungeon_movement.h"
+#include "dungeon_pokemon_attributes.h"
+#include "dungeon_util.h"
+#include "map.h"
+
+const u8 gDirectionBitMasks_2[] = {0x1, 0x2, 0x4, 0x8, 0x10, 0x20, 0x40, 0x80};
+
+bool8 CanAttackInFront(struct DungeonEntity *pokemon, s32 direction)
+{
+    u8 crossableTerrain = GetCrossableTerrain(pokemon->entityData->entityID);
+    struct MapTile *tile;
+    if (crossableTerrain < CROSSABLE_TERRAIN_CREVICE)
+    {
+        crossableTerrain = CROSSABLE_TERRAIN_CREVICE;
+    }
+    tile = GetMapTile_1(pokemon->posWorld.x + gAdjacentTileOffsets[direction].x,
+        pokemon->posWorld.y + gAdjacentTileOffsets[direction].y);
+    if (!(tile->tileType & TILE_TYPE_MAP_EDGE) &&
+        (tile->pokemon == NULL || GetEntityType(tile->pokemon) == ENTITY_POKEMON))
+    {
+        if (!IsFixedDungeon())
+        {
+            if (pokemon->entityData->transformStatus == TRANSFORM_STATUS_MOBILE ||
+                HasItem(pokemon, ITEM_ID_MOBILE_SCARF))
+            {
+                crossableTerrain = CROSSABLE_TERRAIN_WALL;
+            }
+            else if (HasIQSkill(pokemon, IQ_SKILL_ALL_TERRAIN_HIKER))
+            {
+                // BUG: If the Pokémon is a Ghost type that can normally attack through walls,
+                // All-Terrain Hiker/Super Mobile may make the AI think it can't attack through walls.
+                crossableTerrain = CROSSABLE_TERRAIN_CREVICE;
+            }
+            else if (HasIQSkill(pokemon, IQ_SKILL_SUPER_MOBILE))
+            {
+                if ((direction & 1) != 0)
+                {
+                    crossableTerrain = CROSSABLE_TERRAIN_CREVICE;
+                }
+                else
+                {
+                    crossableTerrain = CROSSABLE_TERRAIN_WALL;
+                }
+            }
+        }
+        tile = GetMapTile_1(pokemon->posWorld.x, pokemon->posWorld.y);
+        if (tile->canMoveAdjacent[crossableTerrain] & gDirectionBitMasks_2[direction & DIRECTION_MASK])
+        {
+            return TRUE;
+        }
+    }
+    return FALSE;
+}