From c98299386077d8a0c34150405ab0458f52fc2015 Mon Sep 17 00:00:00 2001
From: PikalaxALT <pikalaxalt@gmail.com>
Date: Sat, 16 Sep 2017 21:08:44 -0400
Subject: [PATCH] IsMetatileDirectionallyImpassable

---
 asm/field_map_obj.s | 45 ---------------------------------------------
 include/data3.h     |  2 ++
 src/field_map_obj.c |  9 +++++++++
 3 files changed, 11 insertions(+), 45 deletions(-)

diff --git a/asm/field_map_obj.s b/asm/field_map_obj.s
index ee67bde5d1..7ad4c2818b 100755
--- a/asm/field_map_obj.s
+++ b/asm/field_map_obj.s
@@ -5,51 +5,6 @@
 
 	.text
 
-	thumb_func_start IsMetatileDirectionallyImpassable
-@ bool8 IsMetatileDirectionallyImpassable(struct npc_state *fieldObject, u16 x, u16 y, u8 direction)
-IsMetatileDirectionallyImpassable: @ 8092DC8
-	push {r4-r7,lr}
-	lsls r1, 16
-	lsrs r6, r1, 16
-	lsls r2, 16
-	lsrs r7, r2, 16
-	lsls r3, 24
-	ldr r1, =gUnknown_0850DB5C
-	lsrs r3, 22
-	subs r5, r3, 0x4
-	adds r1, r5, r1
-	ldrb r0, [r0, 0x1E]
-	ldr r1, [r1]
-	bl _call_via_r1
-	lsls r0, 24
-	cmp r0, 0
-	bne _08092E0A
-	ldr r4, =gUnknown_0850DB6C
-	adds r4, r5, r4
-	lsls r0, r6, 16
-	asrs r0, 16
-	lsls r1, r7, 16
-	asrs r1, 16
-	bl MapGridGetMetatileBehaviorAt
-	lsls r0, 24
-	lsrs r0, 24
-	ldr r1, [r4]
-	bl _call_via_r1
-	lsls r0, 24
-	cmp r0, 0
-	beq _08092E18
-_08092E0A:
-	movs r0, 0x1
-	b _08092E1A
-	.pool
-_08092E18:
-	movs r0, 0
-_08092E1A:
-	pop {r4-r7}
-	pop {r1}
-	bx r1
-	thumb_func_end IsMetatileDirectionallyImpassable
-
 	thumb_func_start CheckForCollisionBetweenFieldObjects
 @ bool8 CheckForCollisionBetweenFieldObjects(struct npc_state *fieldObject, u16 x, u16 y)
 CheckForCollisionBetweenFieldObjects: @ 8092E20
diff --git a/include/data3.h b/include/data3.h
index 6d9bbd084f..0c7de12725 100755
--- a/include/data3.h
+++ b/include/data3.h
@@ -34,6 +34,8 @@ extern const u8 gUnknown_0850D8AC[5];
 extern const u8 gUnknown_0850D8C4[5];
 extern const u8 gUnknown_0850D8E8[4];
 extern bool8 (*const gUnknown_0850DA64[])(struct MapObject *, struct Sprite *, u8, bool8(u8));
+extern bool8 (*const gUnknown_0850DB5C[])(u8);
+extern bool8 (*const gUnknown_0850DB6C[])(u8);
 
 extern const u8 gUnknown_0850DBA0[5];
 
diff --git a/src/field_map_obj.c b/src/field_map_obj.c
index cc81bcb29b..74c71333c9 100755
--- a/src/field_map_obj.c
+++ b/src/field_map_obj.c
@@ -3732,6 +3732,15 @@ bool8 IsCoordOutsideFieldObjectMovementRect(struct MapObject2 *mapObject, s16 x,
     return FALSE;
 }
 
+bool8 IsMetatileDirectionallyImpassable(struct MapObject *mapObject, s16 x, s16 y, u8 direction)
+{
+    if (gUnknown_0850DB5C[direction - 1](mapObject->mapobj_unk_1E) || gUnknown_0850DB6C[direction - 1](MapGridGetMetatileBehaviorAt(x, y)))
+    {
+        return TRUE;
+    }
+    return FALSE;
+}
+
 asm(".section .text.get_face_direction_anim_id");
 
 void FieldObjectClearAnimIfSpecialAnimActive(struct MapObject *);