start decompiling field_control_avatar.c (#177)

* start decompiling field_control_avatar.c

* remove field_control_player_avatar.c

5 files changed, 242 insertions, 498 deletions

diff --git a/asm/field_control_avatar.s b/asm/field_control_avatar.s
index e2fd1b54f..c122f7651 100644
--- a/asm/field_control_avatar.s
+++ b/asm/field_control_avatar.s
@@ -5,499 +5,6 @@
 
 	.text
 
-	thumb_func_start sub_8067EEC
-sub_8067EEC: @ 8067EEC
-	push {r4,r5,lr}
-	movs r1, 0x2
-	negs r1, r1
-	movs r3, 0x3
-	negs r3, r3
-	movs r4, 0x5
-	negs r4, r4
-	movs r5, 0x9
-	negs r5, r5
-	movs r2, 0
-	strb r2, [r0]
-	ldrb r2, [r0, 0x1]
-	ands r1, r2
-	ands r1, r3
-	ands r1, r4
-	ands r1, r5
-	strb r1, [r0, 0x1]
-	movs r1, 0
-	strb r1, [r0, 0x2]
-	pop {r4,r5}
-	pop {r0}
-	bx r0
-	thumb_func_end sub_8067EEC
-
-	thumb_func_start process_overworld_input
-process_overworld_input: @ 8067F18
-	push {r4-r7,lr}
-	mov r7, r9
-	mov r6, r8
-	push {r6,r7}
-	adds r4, r0, 0
-	lsls r1, 16
-	lsrs r5, r1, 16
-	lsls r2, 16
-	lsrs r2, 16
-	mov r8, r2
-	ldr r0, _08067FE8 @ =gPlayerAvatar
-	ldrb r6, [r0, 0x3]
-	ldrb r0, [r0, 0x2]
-	mov r9, r0
-	bl cur_mapdata_block_role_at_player_pos
-	lsls r0, 24
-	lsrs r0, 24
-	bl MetatileBehavior_IsMoveTile
-	lsls r0, 24
-	lsrs r7, r0, 24
-	cmp r6, 0x2
-	bne _08067F4C
-	cmp r7, 0
-	beq _08067F50
-_08067F4C:
-	cmp r6, 0
-	bne _08067FB2
-_08067F50:
-	bl sub_80E6034
-	lsls r0, 16
-	asrs r0, 16
-	cmp r0, 0x4
-	beq _08067F9C
-	movs r0, 0x8
-	ands r0, r5
-	cmp r0, 0
-	beq _08067F6C
-	ldrb r0, [r4]
-	movs r1, 0x4
-	orrs r0, r1
-	strb r0, [r4]
-_08067F6C:
-	movs r0, 0x4
-	ands r0, r5
-	cmp r0, 0
-	beq _08067F7C
-	ldrb r0, [r4]
-	movs r1, 0x8
-	orrs r0, r1
-	strb r0, [r4]
-_08067F7C:
-	movs r0, 0x1
-	ands r0, r5
-	cmp r0, 0
-	beq _08067F8C
-	ldrb r0, [r4]
-	movs r1, 0x1
-	orrs r0, r1
-	strb r0, [r4]
-_08067F8C:
-	movs r0, 0x2
-	ands r0, r5
-	cmp r0, 0
-	beq _08067F9C
-	ldrb r0, [r4]
-	movs r1, 0x80
-	orrs r0, r1
-	strb r0, [r4]
-_08067F9C:
-	movs r0, 0xF0
-	mov r1, r8
-	ands r0, r1
-	cmp r0, 0
-	beq _08067FB2
-	ldrb r0, [r4]
-	movs r1, 0x10
-	orrs r0, r1
-	movs r1, 0x20
-	orrs r0, r1
-	strb r0, [r4]
-_08067FB2:
-	cmp r7, 0
-	bne _08067FD8
-	cmp r6, 0x2
-	bne _08067FC8
-	mov r0, r9
-	cmp r0, 0x2
-	bne _08067FC8
-	ldrb r0, [r4]
-	movs r1, 0x40
-	orrs r0, r1
-	strb r0, [r4]
-_08067FC8:
-	cmp r7, 0
-	bne _08067FD8
-	cmp r6, 0x2
-	bne _08067FD8
-	ldrb r0, [r4]
-	movs r1, 0x2
-	orrs r0, r1
-	strb r0, [r4]
-_08067FD8:
-	movs r0, 0x40
-	mov r1, r8
-	ands r0, r1
-	cmp r0, 0
-	beq _08067FEC
-	movs r0, 0x2
-	b _08068014
-	.align 2, 0
-_08067FE8: .4byte gPlayerAvatar
-_08067FEC:
-	movs r0, 0x80
-	mov r1, r8
-	ands r0, r1
-	cmp r0, 0
-	beq _08067FFA
-	movs r0, 0x1
-	b _08068014
-_08067FFA:
-	movs r0, 0x20
-	mov r1, r8
-	ands r0, r1
-	cmp r0, 0
-	beq _08068008
-	movs r0, 0x3
-	b _08068014
-_08068008:
-	movs r0, 0x10
-	mov r1, r8
-	ands r0, r1
-	cmp r0, 0
-	beq _08068016
-	movs r0, 0x4
-_08068014:
-	strb r0, [r4, 0x2]
-_08068016:
-	pop {r3,r4}
-	mov r8, r3
-	mov r9, r4
-	pop {r4-r7}
-	pop {r0}
-	bx r0
-	thumb_func_end process_overworld_input
-
-	thumb_func_start sub_8068024
-sub_8068024: @ 8068024
-	push {r4-r6,lr}
-	sub sp, 0x8
-	adds r5, r0, 0
-	bl player_get_direction_lower_nybble
-	lsls r0, 24
-	lsrs r6, r0, 24
-	mov r4, sp
-	mov r0, sp
-	bl player_get_pos_to_and_height
-	mov r0, sp
-	movs r1, 0
-	ldrsh r0, [r0, r1]
-	movs r2, 0x2
-	ldrsh r1, [r4, r2]
-	bl MapGridGetMetatileBehaviorAt
-	lsls r0, 16
-	lsrs r4, r0, 16
-	bl CheckTrainers
-	lsls r0, 24
-	lsrs r0, 24
-	cmp r0, 0x1
-	beq _08068150
-	bl mapheader_run_first_tag2_script_list_match
-	lsls r0, 24
-	lsrs r0, 24
-	cmp r0, 0x1
-	beq _08068150
-	ldrb r1, [r5]
-	movs r0, 0x80
-	ands r0, r1
-	cmp r0, 0
-	beq _08068076
-	bl sub_80687A4
-	cmp r0, 0x1
-	beq _08068150
-_08068076:
-	ldrb r1, [r5]
-	movs r0, 0x40
-	ands r0, r1
-	cmp r0, 0
-	beq _08068098
-	movs r0, 0x5
-	bl IncrementGameStat
-	mov r0, sp
-	adds r1, r4, 0
-	adds r2, r6, 0
-	bl sub_80687E4
-	lsls r0, 24
-	lsrs r0, 24
-	cmp r0, 0x1
-	beq _08068150
-_08068098:
-	ldrb r1, [r5]
-	movs r0, 0x2
-	ands r0, r1
-	cmp r0, 0
-	beq _080680B0
-	adds r0, r4, 0
-	bl is_it_battle_time_3
-	lsls r0, 24
-	lsrs r0, 24
-	cmp r0, 0x1
-	beq _08068150
-_080680B0:
-	ldrb r1, [r5]
-	movs r0, 0x10
-	ands r0, r1
-	cmp r0, 0
-	beq _080680D2
-	ldrb r0, [r5, 0x2]
-	cmp r0, r6
-	bne _080680D2
-	mov r0, sp
-	adds r1, r4, 0
-	adds r2, r6, 0
-	bl mapheader_run_first_tag2_script_list_match_conditionally
-	lsls r0, 24
-	lsrs r0, 24
-	cmp r0, 0x1
-	beq _08068150
-_080680D2:
-	mov r4, sp
-	mov r0, sp
-	bl player_get_next_pos_and_height
-	mov r0, sp
-	movs r1, 0
-	ldrsh r0, [r0, r1]
-	movs r2, 0x2
-	ldrsh r1, [r4, r2]
-	bl MapGridGetMetatileBehaviorAt
-	lsls r0, 16
-	lsrs r4, r0, 16
-	ldrb r1, [r5]
-	movs r0, 0x1
-	ands r0, r1
-	cmp r0, 0
-	beq _08068108
-	mov r0, sp
-	adds r1, r4, 0
-	adds r2, r6, 0
-	bl sub_80681F0
-	lsls r0, 24
-	lsrs r0, 24
-	cmp r0, 0x1
-	beq _08068150
-_08068108:
-	ldrb r1, [r5]
-	movs r0, 0x20
-	ands r0, r1
-	cmp r0, 0
-	beq _0806812A
-	ldrb r0, [r5, 0x2]
-	cmp r0, r6
-	bne _0806812A
-	mov r0, sp
-	adds r1, r4, 0
-	adds r2, r6, 0
-	bl map_warp_consider_2_to_inside
-	lsls r0, 24
-	lsrs r0, 24
-	cmp r0, 0x1
-	beq _08068150
-_0806812A:
-	ldrb r1, [r5]
-	movs r0, 0x1
-	ands r0, r1
-	cmp r0, 0
-	beq _0806813C
-	bl sub_8068770
-	cmp r0, 0x1
-	beq _08068150
-_0806813C:
-	ldrb r1, [r5]
-	movs r0, 0x4
-	ands r0, r1
-	cmp r0, 0
-	beq _08068154
-	movs r0, 0x6
-	bl PlaySE
-	bl sub_8071310
-_08068150:
-	movs r0, 0x1
-	b _08068166
-_08068154:
-	movs r0, 0x8
-	ands r0, r1
-	cmp r0, 0
-	beq _08068164
-	bl sub_80A6D1C
-	cmp r0, 0x1
-	beq _08068150
-_08068164:
-	movs r0, 0
-_08068166:
-	add sp, 0x8
-	pop {r4-r6}
-	pop {r1}
-	bx r1
-	thumb_func_end sub_8068024
-
-	thumb_func_start player_get_pos_to_and_height
-player_get_pos_to_and_height: @ 8068170
-	push {r4,lr}
-	adds r4, r0, 0
-	adds r1, r4, 0x2
-	bl PlayerGetDestCoords
-	bl PlayerGetZCoord
-	strb r0, [r4, 0x4]
-	pop {r4}
-	pop {r0}
-	bx r0
-	thumb_func_end player_get_pos_to_and_height
-
-	thumb_func_start player_get_next_pos_and_height
-player_get_next_pos_and_height: @ 8068188
-	push {r4,r5,lr}
-	sub sp, 0x4
-	adds r5, r0, 0
-	adds r1, r5, 0x2
-	bl GetXYCoordsOneStepInFrontOfPlayer
-	mov r4, sp
-	adds r4, 0x2
-	mov r0, sp
-	adds r1, r4, 0
-	bl PlayerGetDestCoords
-	mov r0, sp
-	movs r1, 0
-	ldrsh r0, [r0, r1]
-	movs r2, 0
-	ldrsh r1, [r4, r2]
-	bl MapGridGetZCoordAt
-	lsls r0, 24
-	lsrs r0, 24
-	cmp r0, 0
-	beq _080681BA
-	bl PlayerGetZCoord
-_080681BA:
-	strb r0, [r5, 0x4]
-	add sp, 0x4
-	pop {r4,r5}
-	pop {r0}
-	bx r0
-	thumb_func_end player_get_next_pos_and_height
-
-	thumb_func_start cur_mapdata_block_role_at_player_pos
-cur_mapdata_block_role_at_player_pos: @ 80681C4
-	push {r4,lr}
-	sub sp, 0x4
-	mov r4, sp
-	adds r4, 0x2
-	mov r0, sp
-	adds r1, r4, 0
-	bl PlayerGetDestCoords
-	mov r0, sp
-	movs r1, 0
-	ldrsh r0, [r0, r1]
-	movs r2, 0
-	ldrsh r1, [r4, r2]
-	bl MapGridGetMetatileBehaviorAt
-	lsls r0, 16
-	lsrs r0, 16
-	add sp, 0x4
-	pop {r4}
-	pop {r1}
-	bx r1
-	thumb_func_end cur_mapdata_block_role_at_player_pos
-
-	thumb_func_start sub_80681F0
-sub_80681F0: @ 80681F0
-	push {r4,lr}
-	lsls r2, 24
-	lsrs r2, 24
-	lsls r1, 24
-	lsrs r1, 24
-	bl TryGetScriptOnPressingA
-	adds r4, r0, 0
-	cmp r4, 0
-	bne _08068208
-	movs r0, 0
-	b _08068234
-_08068208:
-	ldr r0, _0806823C @ =gUnknown_0815281E
-	cmp r4, r0
-	beq _0806822C
-	ldr r0, _08068240 @ =gUnknown_08152C39
-	cmp r4, r0
-	beq _0806822C
-	ldr r0, _08068244 @ =gUnknown_0815F36C
-	cmp r4, r0
-	beq _0806822C
-	ldr r0, _08068248 @ =gUnknown_0815F43A
-	cmp r4, r0
-	beq _0806822C
-	ldr r0, _0806824C @ =gUnknown_081A0009
-	cmp r4, r0
-	beq _0806822C
-	movs r0, 0x5
-	bl PlaySE
-_0806822C:
-	adds r0, r4, 0
-	bl ScriptContext1_SetupScript
-	movs r0, 0x1
-_08068234:
-	pop {r4}
-	pop {r1}
-	bx r1
-	.align 2, 0
-_0806823C: .4byte gUnknown_0815281E
-_08068240: .4byte gUnknown_08152C39
-_08068244: .4byte gUnknown_0815F36C
-_08068248: .4byte gUnknown_0815F43A
-_0806824C: .4byte gUnknown_081A0009
-	thumb_func_end sub_80681F0
-
-	thumb_func_start TryGetScriptOnPressingA
-TryGetScriptOnPressingA: @ 8068250
-	push {r4-r7,lr}
-	mov r7, r8
-	push {r7}
-	adds r6, r0, 0
-	lsls r1, 24
-	lsrs r5, r1, 24
-	mov r8, r5
-	lsls r2, 24
-	lsrs r4, r2, 24
-	adds r7, r4, 0
-	adds r1, r5, 0
-	adds r2, r4, 0
-	bl sub_8068364
-	cmp r0, 0
-	bne _0806829C
-	adds r0, r6, 0
-	adds r1, r5, 0
-	adds r2, r4, 0
-	bl TryGetInvisibleMapObjectScript
-	cmp r0, 0
-	bne _0806829C
-	adds r0, r6, 0
-	adds r1, r5, 0
-	adds r2, r4, 0
-	bl sub_8068500
-	cmp r0, 0
-	bne _0806829C
-	adds r0, r6, 0
-	mov r1, r8
-	adds r2, r7, 0
-	bl TryGetFieldMoveScript
-	cmp r0, 0
-	bne _0806829C
-	movs r0, 0
-_0806829C:
-	pop {r3}
-	mov r8, r3
-	pop {r4-r7}
-	pop {r1}
-	bx r1
-	thumb_func_end TryGetScriptOnPressingA
-
 	thumb_func_start sub_80682A8
 sub_80682A8: @ 80682A8
 	push {r4-r6,lr}
diff --git a/include/asm.h b/include/asm.h
index ec0516497..acf688d84 100644
--- a/include/asm.h
+++ b/include/asm.h
@@ -8,10 +8,17 @@
 
 struct UnkInputStruct
 {
-	u8 input_field_0;
-	u8 input_field_1;
-	u8 input_field_2;
-	u8 input_field_3;
+    u8 input_field_0_0:1;
+    u8 input_field_0_1:1;
+    u8 input_field_0_2:1;
+    u8 input_field_0_3:1;
+    u8 input_field_0_4:1;
+    u8 input_field_0_5:1;
+    u8 input_field_0_6:1;
+    u8 input_field_0_7:1;
+    u8 input_field_1;
+    u8 input_field_2;
+    u8 input_field_3;
 };
 
 struct UnknownStruct_FPA
diff --git a/include/field_player_avatar.h b/include/field_player_avatar.h
index 0095c229f..9f6f634f7 100644
--- a/include/field_player_avatar.h
+++ b/include/field_player_avatar.h
@@ -60,7 +60,7 @@ void GetXYCoordsOneStepInFrontOfPlayer(s16 *x, s16 *y);
 void PlayerGetDestCoords(s16 *, s16 *);
 u8 player_get_direction_lower_nybble(void);
 u8 player_get_direction_upper_nybble(void);
-// PlayerGetZCoord
+u8 PlayerGetZCoord(void);
 u8 TestPlayerAvatarFlags(u8);
 // sub_80597D0
 // GetPlayerAvatarObjectId
diff --git a/ld_script.txt b/ld_script.txt
index b258669dc..ec17f60e2 100644
--- a/ld_script.txt
+++ b/ld_script.txt
@@ -87,6 +87,7 @@ SECTIONS {
         src/text_window.o(.text);
         src/script.o(.text);
         src/scrcmd.o(.text);
+        src/field_control_avatar.o(.text);
         asm/field_control_avatar.o(.text);
         src/event_data.o(.text);
         src/coord_event_weather.o(.text);
diff --git a/src/field_control_avatar.c b/src/field_control_avatar.c
new file mode 100644
index 000000000..495327b9b
--- /dev/null
+++ b/src/field_control_avatar.c
@@ -0,0 +1,229 @@
+#include "global.h"
+#include "asm.h"
+#include "field_player_avatar.h"
+#include "metatile_behavior.h"
+#include "rom4.h"
+#include "script.h"
+#include "sound.h"
+#include "trainer_see.h"
+
+extern u8 gUnknown_0815281E[];
+extern u8 gUnknown_08152C39[];
+extern u8 gUnknown_0815F36C[];
+extern u8 gUnknown_0815F43A[];
+extern u8 gUnknown_081A0009[];
+
+__attribute__((naked))
+void sub_8067EEC(struct UnkInputStruct *s)
+{
+    asm(".syntax unified\n\
+    push {r4,r5,lr}\n\
+    movs r1, 0x2\n\
+    negs r1, r1\n\
+    movs r3, 0x3\n\
+    negs r3, r3\n\
+    movs r4, 0x5\n\
+    negs r4, r4\n\
+    movs r5, 0x9\n\
+    negs r5, r5\n\
+    movs r2, 0\n\
+    strb r2, [r0]\n\
+    ldrb r2, [r0, 0x1]\n\
+    ands r1, r2\n\
+    ands r1, r3\n\
+    ands r1, r4\n\
+    ands r1, r5\n\
+    strb r1, [r0, 0x1]\n\
+    movs r1, 0\n\
+    strb r1, [r0, 0x2]\n\
+    pop {r4,r5}\n\
+    pop {r0}\n\
+    bx r0\n\
+    .syntax divided\n");
+}
+
+extern u16 cur_mapdata_block_role_at_player_pos(int);
+
+void process_overworld_input(struct UnkInputStruct *pStruct, u16 keys, u16 heldKeys)
+{
+    u8 r6 = gPlayerAvatar.running1;
+    u8 r9 = gPlayerAvatar.running2;
+    bool8 r7 = MetatileBehavior_IsMoveTile(cur_mapdata_block_role_at_player_pos(r9));
+    
+    if ((r6 == 2 && r7 == FALSE) || r6 == 0)
+    {
+        if (sub_80E6034() != 4)
+        {
+            if (keys & START_BUTTON)
+                pStruct->input_field_0_2 = TRUE;
+            if (keys & SELECT_BUTTON)
+                pStruct->input_field_0_3 = TRUE;
+            if (keys & A_BUTTON)
+                pStruct->input_field_0_0 = TRUE;
+            if (keys & B_BUTTON)
+                pStruct->input_field_0_7 = TRUE;
+        }
+        if (heldKeys & (DPAD_UP | DPAD_DOWN | DPAD_LEFT | DPAD_RIGHT))
+        {
+            pStruct->input_field_0_4 = TRUE;
+            pStruct->input_field_0_5 = TRUE;
+        }
+    }
+    if (r7 == FALSE)
+    {
+        if (r6 == 2 && r9 == 2)
+            pStruct->input_field_0_6 = TRUE;
+        if (r7 == FALSE && r6 == 2)
+            pStruct->input_field_0_1 = TRUE;
+    }
+    if (heldKeys & DPAD_UP)
+        pStruct->input_field_2 = 2;
+    else if (heldKeys & DPAD_DOWN)
+        pStruct->input_field_2 = 1;
+    else if (heldKeys & DPAD_LEFT)
+        pStruct->input_field_2 = 3;
+    else if (heldKeys & DPAD_RIGHT)
+        pStruct->input_field_2 = 4;
+}
+
+struct MapPosition
+{
+    s16 x;
+    s16 y;
+    u8 height;
+};
+
+void player_get_pos_to_and_height(struct MapPosition *);
+extern u8 mapheader_run_first_tag2_script_list_match(void);
+extern int sub_80687A4(void);
+extern u8 sub_80687E4();
+extern u8 is_it_battle_time_3();
+extern u8 mapheader_run_first_tag2_script_list_match_conditionally();
+void player_get_next_pos_and_height(struct MapPosition *);
+u8 sub_80681F0(struct MapPosition *position, u16 b, u8 c);
+extern u8 map_warp_consider_2_to_inside();
+extern int sub_8068770(void);
+extern void sub_8071310(void);
+extern int sub_80A6D1C(void);
+
+int sub_8068024(struct UnkInputStruct *s)
+{
+    struct MapPosition position;
+    u8 r6;
+    u16 r4;
+
+    r6 = player_get_direction_lower_nybble();
+    player_get_pos_to_and_height(&position);
+    r4 = MapGridGetMetatileBehaviorAt(position.x, position.y);
+    if (CheckTrainers() == TRUE)
+        return 1;
+    if (mapheader_run_first_tag2_script_list_match() == 1)
+        return 1;
+    if (s->input_field_0_7 && sub_80687A4() == 1)
+        return 1;
+    if (s->input_field_0_6)
+    {
+        IncrementGameStat(5);
+        if (sub_80687E4(&position, r4, r6) == 1)
+            return 1;
+    }
+    if (s->input_field_0_1 && is_it_battle_time_3(r4) == 1)
+        return 1;
+    if (s->input_field_0_4 && s->input_field_2 == r6)
+    {
+        if (mapheader_run_first_tag2_script_list_match_conditionally(&position, r4, r6) == 1)
+            return 1;
+    }
+    player_get_next_pos_and_height(&position);
+    r4 = MapGridGetMetatileBehaviorAt(position.x, position.y);
+    if (s->input_field_0_0 && sub_80681F0(&position, r4, r6) == 1)
+        return 1;
+    if (s->input_field_0_5 && s->input_field_2 == r6)
+    {
+        if (map_warp_consider_2_to_inside(&position, r4, r6) == 1)
+            return 1;
+    }
+    if (s->input_field_0_0 && sub_8068770() == 1)
+        return 1;
+    if (s->input_field_0_2)
+    {
+        PlaySE(6);
+        sub_8071310();
+        return 1;
+    }
+    //_08068154
+    if (s->input_field_0_3 && sub_80A6D1C() == 1)
+        return 1;
+    return FALSE;
+}
+
+void player_get_pos_to_and_height(struct MapPosition *position)
+{
+    PlayerGetDestCoords(&position->x, &position->y);
+    position->height = PlayerGetZCoord();
+}
+
+void player_get_next_pos_and_height(struct MapPosition *position)
+{
+    s16 x, y;
+    
+    GetXYCoordsOneStepInFrontOfPlayer(&position->x, &position->y);
+    PlayerGetDestCoords(&x, &y);
+    if (MapGridGetZCoordAt(x, y) != 0)
+        position->height = PlayerGetZCoord();
+    else
+        position->height = 0;
+}
+
+u16 cur_mapdata_block_role_at_player_pos(int unused)
+{
+    s16 x, y;
+    
+    PlayerGetDestCoords(&x, &y);
+    return MapGridGetMetatileBehaviorAt(x, y);
+}
+
+u8 *TryGetScriptOnPressingA(struct MapPosition *position, u8 b, u8 c);
+
+u8 sub_80681F0(struct MapPosition *position, u16 b, u8 c)
+{
+    u8 *script = TryGetScriptOnPressingA(position, b, c);
+    
+    if (script == NULL)
+        return FALSE;
+    
+    if (script != gUnknown_0815281E
+     && script != gUnknown_08152C39
+     && script != gUnknown_0815F36C
+     && script != gUnknown_0815F43A
+     && script != gUnknown_081A0009)
+        PlaySE(5);
+    
+    ScriptContext1_SetupScript(script);
+    return TRUE;
+}
+
+u8 *sub_8068364();
+u8 *TryGetInvisibleMapObjectScript();
+u8 *sub_8068500();
+u8 *TryGetFieldMoveScript();
+
+u8 *TryGetScriptOnPressingA(struct MapPosition *position, u8 b, u8 c)
+{
+    u8 *script;
+    
+    script = sub_8068364(position, b, c);
+    if (script != NULL)
+        return script;
+    script = TryGetInvisibleMapObjectScript(position, b, c);
+    if (script != NULL)
+        return script;
+    script = sub_8068500(position, b, c);
+    if (script != NULL)
+        return script;
+    script = TryGetFieldMoveScript(position, b, c);
+    if (script != NULL)
+        return script;
+    
+    return NULL;
+}