Document teleporter and escalator anim

asm/field_effect.s

@@ -2629,7 +2629,7 @@ sub_80847F8: @ 80847F8
 	bl FreezeObjectEvents
 	bl CameraObjectReset2
 	ldrb r0, [r4, 0xA]
-	bl sub_809C448
+	bl StartEscalator
 	movs r0, 0x1
 	bl sub_81128BC
 	ldrh r0, [r4, 0x8]
@@ -2859,7 +2859,7 @@ sub_80849A0: @ 80849A0
 	lsrs r0, 24
 	cmp r0, 0x1
 	bne _080849DC
-	bl sub_809C460
+	bl StopEscalator
 	bl WarpIntoMap
 	ldr r1, _080849E4 @ =gFieldCallback
 	ldr r0, _080849E8 @ =sub_80849F4
@@ -2984,7 +2984,7 @@ _08084AC4:
 	movs r1, 0
 _08084AC6:
 	adds r0, r1, 0
-	bl sub_809C448
+	bl StartEscalator
 	movs r0, 0x1
 	add sp, 0x4
 	pop {r4,r5}
@@ -3163,11 +3163,11 @@ _08084C14: .4byte gSprites
 sub_8084C18: @ 8084C18
 	push {r4,lr}
 	adds r4, r0, 0
-	bl sub_809C474
+	bl IsEscalatorMoving
 	lsls r0, 24
 	cmp r0, 0
 	bne _08084C34
-	bl sub_809C460
+	bl StopEscalator
 	ldrh r0, [r4, 0x8]
 	adds r0, 0x1
 	strh r0, [r4, 0x8]

data/maps/Route25_SeaCottage/scripts.inc

@@ -177,7 +177,7 @@ Route25_SeaCottage_EventScript_RunCellSeparator:: @ 81706FA
 	playse SE_PIN
 	waitse
 	setvar VAR_0x8004, 0
-	special sub_809C4A8
+	special AnimateTeleporterHousing
 	delay 10
 	call Route25_SeaCottage_EventScript_PlayTeleporterBeepSE
 	call Route25_SeaCottage_EventScript_PlayTeleporterBeepSE
@@ -187,9 +187,9 @@ Route25_SeaCottage_EventScript_RunCellSeparator:: @ 81706FA
 	call Route25_SeaCottage_EventScript_PlayTeleporterBeepSE
 	call Route25_SeaCottage_EventScript_PlayTeleporterBeepSE
 	setvar VAR_0x8004, 1
-	special sub_809C4A8
+	special AnimateTeleporterHousing
 	playse SE_TK_WARPIN
-	special sub_809C5FC
+	special AnimateTeleporterCable
 	waitse
 	call Route25_SeaCottage_EventScript_PlayTeleporterBeepSE
 	call Route25_SeaCottage_EventScript_PlayTeleporterBeepSE

data/specials.inc

@@ -445,9 +445,9 @@ gSpecials:: @ 815FD60
 	def_special Special_BrailleCursorToggle
 	def_special Script_ResetUnionRoomTrade
 	def_special Special_PlayerPartyContainsSpeciesWithPlayerID
-	def_special sub_809C4A8
+	def_special AnimateTeleporterHousing
 	def_special IsDodrioInParty
-	def_special sub_809C5FC
+	def_special AnimateTeleporterCable
 	def_special Special_InitElevatorFloorSelectMenuPos
 	def_special Special_ComputeLoreleiDollCollection
 	def_special Special_LoopWingFlapSound

include/constants/metatile_labels.h

@@ -8,6 +8,29 @@
 #define METATILE_Mart_CounterMid_Top     0x2BF
 #define METATILE_Mart_CounterMid_Bottom  0x2C0   
 
+// gTileset_PokemonCenter
+#define METATILE_PokemonCenter_Escalator_Top_Normal                  0x2E4
+#define METATILE_PokemonCenter_Escalator_Top_Transition1             0x317
+#define METATILE_PokemonCenter_Escalator_Top_Transition2             0x315
+#define METATILE_PokemonCenter_Escalator_TopNext_Normal              0x2E3
+#define METATILE_PokemonCenter_Escalator_TopNext_Transition1         0x316
+#define METATILE_PokemonCenter_Escalator_TopNext_Transition2         0x314
+#define METATILE_PokemonCenter_Escalator_TopNextRail_Normal          0x2EB
+#define METATILE_PokemonCenter_Escalator_TopNextRail_Transition1     0x31E
+#define METATILE_PokemonCenter_Escalator_TopNextRail_Transition2     0x31C
+#define METATILE_PokemonCenter_Escalator_Bottom_Normal               0x2D9
+#define METATILE_PokemonCenter_Escalator_Bottom_Transition1          0x313
+#define METATILE_PokemonCenter_Escalator_Bottom_Transition2          0x311
+#define METATILE_PokemonCenter_Escalator_BottomRail_Normal           0x2D1
+#define METATILE_PokemonCenter_Escalator_BottomRail_Transition1      0x30B
+#define METATILE_PokemonCenter_Escalator_BottomRail_Transition2      0x309
+#define METATILE_PokemonCenter_Escalator_BottomNext_Normal           0x2D8
+#define METATILE_PokemonCenter_Escalator_BottomNext_Transition1      0x312
+#define METATILE_PokemonCenter_Escalator_BottomNext_Transition2      0x310
+#define METATILE_PokemonCenter_Escalator_BottomNextRail_Normal       0x2D0
+#define METATILE_PokemonCenter_Escalator_BottomNextRail_Transition1  0x30A
+#define METATILE_PokemonCenter_Escalator_BottomNextRail_Transition2  0x308
+
 // gTileset_VermilionGym
 #define METATILE_VermilionGym_Floor                             0x281
 #define METATILE_VermilionGym_Beam_MidTop                       0x285
@@ -39,6 +62,18 @@
 #define METATILE_VermilionGym_Beam_Node_BottomRight_Edge_HalfOn 0x2C6
 #define METATILE_VermilionGym_Beam_Node_BottomRight_HalfOn      0x2C7
 
+// gTileset_SeaCottage
+#define METATILE_SeaCottage_Teleporter_Light_Green      0x28A
+#define METATILE_SeaCottage_Teleporter_Light_Yellow     0x2B5
+#define METATILE_SeaCottage_Teleporter_Light_Red        0x2B6
+#define METATILE_SeaCottage_Teleporter_Cable_Top        0x285
+#define METATILE_SeaCottage_Teleporter_Cable_Bottom     0x2B4
+#define METATILE_SeaCottage_Teleporter_CableBall_Top    0x2B9
+#define METATILE_SeaCottage_Teleporter_CableBall_Bottom 0x2BA
+#define METATILE_SeaCottage_Teleporter_Door             0x296
+#define METATILE_SeaCottage_Teleporter_Door_HalfGlowing 0x2B7
+#define METATILE_SeaCottage_Teleporter_Door_FullGlowing 0x2B8
+
 // gTileset_GameCorner
 #define METATILE_GameCorner_Floor_ShadeFull          0x292
 #define METATILE_GameCorner_Floor_StairsTop          0x29D

include/global.fieldmap.h

@@ -3,6 +3,8 @@
 
 #define OBJECT_EVENTS_COUNT 16
 
+#define METATILE_COLLISION_MASK 0x0C00
+
 enum
 {
     CONNECTION_SOUTH = 1,

include/sea_cottage_special_anim.h

@@ -1,12 +0,0 @@
-#ifndef GUARD_SEA_COTTAGE_SPECIAL_ANIM_H
-#define GUARD_SEA_COTTAGE_SPECIAL_ANIM_H
-
-#include "global.h"
-
-void sub_809C448(u8 a0);
-void sub_809C460(void);
-bool8 sub_809C474(void);
-void sub_809C4A8(void);
-void sub_809C5FC(void);
-
-#endif // GUARD_SEA_COTTAGE_SPECIAL_ANIM_H

include/special_field_anim.h

@@ -0,0 +1,10 @@
+#ifndef GUARD_SPECIAL_FIELD_ANIM_H
+#define GUARD_SPECIAL_FIELD_ANIM_H
+
+#include "global.h"
+
+void StartEscalator(u8 a0);
+void StopEscalator(void);
+bool8 IsEscalatorMoving(void);
+
+#endif // GUARD_SPECIAL_FIELD_ANIM_H

ld_script.txt

@@ -138,7 +138,7 @@ SECTIONS {
         src/battle_anim_mon_movement.o(.text);
         src/item.o(.text);
         src/shop.o(.text);
-        src/sea_cottage_special_anim.o(.text);
+        src/special_field_anim.o(.text);
         src/berry.o(.text);
         src/script_menu.o(.text);
         asm/naming_screen.o(.text);
@@ -455,7 +455,7 @@ SECTIONS {
         src/battle_anim_mon_movement.o(.rodata);
         src/item.o(.rodata);
         src/shop.o(.rodata);
-        src/sea_cottage_special_anim.o(.rodata);
+        src/special_field_anim.o(.rodata);
         src/berry.o(.rodata);
         src/script_menu.o(.rodata);
         data/naming_screen.o(.rodata);

src/sea_cottage_special_anim.c

@@ -1,262 +0,0 @@
-#include "global.h"
-#include "event_data.h"
-#include "task.h"
-#include "field_player_avatar.h"
-#include "fieldmap.h"
-#include "field_camera.h"
-
-static EWRAM_DATA u8 gUnknown_2039984 = 0;
-
-static void sub_809C1D8(u8 taskId, const s16 *a1, u16 a2);
-static void sub_809C334(u8 taskId);
-static void sub_809C500(u8 taskId);
-static void sub_809C640(u8 taskId);
-
-static const u16 gUnknown_83DF0D4[] = {0x0308, 0x030a, 0x02d0};
-static const u16 gUnknown_83DF0DA[] = {0x0309, 0x030b, 0x02d1};
-static const u16 gUnknown_83DF0E0[] = {0x0310, 0x0312, 0x02d8};
-static const u16 gUnknown_83DF0E6[] = {0x0311, 0x0313, 0x02d9};
-static const u16 gUnknown_83DF0EC[] = {0x02e3, 0x0316, 0x0314};
-static const u16 gUnknown_83DF0F2[] = {0x02e4, 0x0317, 0x0315};
-static const u16 gUnknown_83DF0F8[] = {0x02eb, 0x031e, 0x031c};
-
-// Functions
-static void sub_809C1D8(u8 taskId, const s16 *a1, u16 a2)
-{
-    s16 r5, r3, r4;
-    s16 i, j;
-    
-    r5 = gTasks[taskId].data[4] - 1;
-    r3 = gTasks[taskId].data[5] - 1;
-    r4 = gTasks[taskId].data[1];
-    
-    if (gTasks[taskId].data[2] == 0)
-    {
-        for (i = 0; i < 3; i++)
-        {
-            for (j = 0; j < 3; j++)
-            {
-                s32 id = MapGridGetMetatileIdAt(r5 + j, r3 + i);
-                
-                if (a1[r4] == (s16)id)
-                {
-                    if (r4 != 2)
-                        MapGridSetMetatileIdAt(r5 + j, r3 + i, a2 | a1[r4 + 1]);
-                    else
-                        MapGridSetMetatileIdAt(r5 + j, r3 + i, a2 | a1[0]);
-                }
-            }
-        }
-    }
-    else
-    {
-        for (i = 0; i < 3; i++)
-        {
-            for (j = 0; j < 3; j++)
-            {
-                s32 id = MapGridGetMetatileIdAt(r5 + j, r3 + i);
-
-                if (a1[2 - r4] == (s16)id)
-                {
-                    if (r4 != 2)
-                        MapGridSetMetatileIdAt(r5 + j, r3 + i, a2 | a1[1 - r4]);
-                    else
-                        MapGridSetMetatileIdAt(r5 + j, r3 + i, a2 | a1[2]);
-                }
-            }
-        }
-    }
-}
-
-static void sub_809C334(u8 taskId)
-{
-    s16 *data = gTasks[taskId].data;
-    u16 v1;
-    
-    data[3] = 1;
-    switch (data[0])
-    {
-    case 0:
-        sub_809C1D8(taskId, gUnknown_83DF0D4, 0);
-        break;
-    case 1:
-        sub_809C1D8(taskId, gUnknown_83DF0DA, 0);
-        break;
-    case 2:
-        sub_809C1D8(taskId, gUnknown_83DF0E0, 0xC00);
-        break;
-    case 3:
-        sub_809C1D8(taskId, gUnknown_83DF0E6, 0);
-        break;
-    case 4:
-        sub_809C1D8(taskId, gUnknown_83DF0EC, 0xC00);
-        break;
-    case 5:
-        sub_809C1D8(taskId, gUnknown_83DF0F2, 0);
-        break;
-    case 6:
-        sub_809C1D8(taskId, gUnknown_83DF0F8, 0);
-    default:
-        break;
-    }
-    
-    data[0] = (data[0] + 1) & 7;
-    v1 = data[0] & 7;
-    if (v1 == 0)
-    {
-        DrawWholeMapView();
-        data[1] = (data[1] + 1) % 3;
-        data[3] = v1;
-    }
-}
-
-static u8 sub_809C3FC(u16 a0)
-{
-    u8 taskId;
-    s16 *data;
-
-    taskId = CreateTask(sub_809C334, 0);
-    data = gTasks[taskId].data;
-    PlayerGetDestCoords(&data[4], &data[5]);
-    data[0] = 0;
-    data[1] = 0;
-    data[2] = a0;
-    sub_809C334(taskId);
-    return taskId;
-}
-
-void sub_809C448(u8 a0)
-{
-    u8 taskId;
-    
-    taskId = sub_809C3FC(a0);
-    gUnknown_2039984 = taskId;
-}
-
-void sub_809C460(void)
-{
-    DestroyTask(gUnknown_2039984);
-}
-
-bool8 sub_809C474(void)
-{    
-    if (gTasks[gUnknown_2039984].data[3] == 0)
-    {
-        if (gTasks[gUnknown_2039984].data[1] != 2)
-            return TRUE;
-        return FALSE;
-    }
-    else
-    {
-        return TRUE;
-    }
-}
-
-// special 0x1b5 - creates a tile animaiton one block left two-four up the player
-void sub_809C4A8(void)
-{
-    u8 taskId;
-    s16 *data;
-    
-    taskId = CreateTask(sub_809C500, 0);
-    gTasks[taskId].data[0] = 0;
-    gTasks[taskId].data[1] = 0;
-    data = gTasks[taskId].data;
-    PlayerGetDestCoords(&data[2], &data[3]);
-    if (gSpecialVar_0x8004 == 0)
-    {
-        gTasks[taskId].data[2] += 6;
-        gTasks[taskId].data[3] -= 5;
-    }
-    else
-    {
-        gTasks[taskId].data[2]--;
-        gTasks[taskId].data[3] -= 5;
-    }    
-}
-
-static void sub_809C500(u8 taskId)
-{
-    s16 *data = gTasks[taskId].data;
-    
-    if (data[0] == 0)
-    {
-        if ((data[1] & 1) == 0)
-        {
-            MapGridSetMetatileIdAt(data[2], data[3], 0xEB5);
-            MapGridSetMetatileIdAt(data[2], data[3] + 2, 0xEB7);
-        }
-        else
-        {
-            MapGridSetMetatileIdAt(data[2], data[3], 0xEB6);
-            MapGridSetMetatileIdAt(data[2], data[3] + 2, 0xEB8);
-        }
-        CurrentMapDrawMetatileAt(data[2], data[3]);
-        CurrentMapDrawMetatileAt(data[2], data[3] + 2);
-    }
-    
-    data[0]++;
-    if (data[0] != 0x10)
-        return;
-    
-    data[0] = 0;
-    data[1]++;
-    if (data[1] != 0xD)
-        return;
-    
-    MapGridSetMetatileIdAt(data[2], data[3], 0xE8A);
-    MapGridSetMetatileIdAt(data[2], data[3] + 2, 0xE96);
-    CurrentMapDrawMetatileAt(data[2], data[3]);
-    CurrentMapDrawMetatileAt(data[2], data[3] + 2);
-    DestroyTask(taskId);
-}
-
-// special 0x1B7 - creates a tile animation two-six blocks right from the top-left corner of the screen
-void sub_809C5FC(void)
-{
-    u8 taskId;
-    s16 *data;
-    
-    taskId = CreateTask(sub_809C640, 0);
-    gTasks[taskId].data[0] = 0;
-    gTasks[taskId].data[1] = 0;
-    data = gTasks[taskId].data;
-    PlayerGetDestCoords(&data[2], &data[3]);
-    gTasks[taskId].data[2] += 4;
-    gTasks[taskId].data[3] -= 5;
-}
-
-static void sub_809C640(u8 taskId)
-{
-    s16 *data = gTasks[taskId].data;
-    
-    if (data[0] == 0)
-    {
-        if (data[1] != 0)
-        {
-            MapGridSetMetatileIdAt(data[2], data[3], 0xE85);
-            MapGridSetMetatileIdAt(data[2], data[3] + 1, 0xEB4);
-            CurrentMapDrawMetatileAt(data[2], data[3]);
-            CurrentMapDrawMetatileAt(data[2], data[3] + 1);
-            if (data[1] == 4)
-            {
-                DestroyTask(taskId);
-                return;
-            }
-            
-            data[2]--;
-        }
-        MapGridSetMetatileIdAt(data[2], data[3], 0xEB9);
-        MapGridSetMetatileIdAt(data[2], data[3] + 1, 0xEBA);
-        CurrentMapDrawMetatileAt(data[2], data[3]);
-        CurrentMapDrawMetatileAt(data[2], data[3] + 1);
-    }
-    
-    data[0]++;
-    if (data[0] == 4)
-    {
-        data[0] = 0;
-        data[1]++;
-    }
-}
-

src/special_field_anim.c

@@ -0,0 +1,341 @@
+#include "global.h"
+#include "event_data.h"
+#include "task.h"
+#include "field_player_avatar.h"
+#include "fieldmap.h"
+#include "field_camera.h"
+#include "constants/metatile_labels.h"
+
+static EWRAM_DATA u8 sEscalatorTaskId = 0;
+
+static void SetEscalatorMetatile(u8 taskId, const s16 *metatileIds, u16 metatileMasks);
+static void Task_DrawEscalator(u8 taskId);
+static void Task_DrawTeleporterHousing(u8 taskId);
+static void Task_DrawTeleporterCable(u8 taskId);
+
+#define ESCALATOR_STAGES     3
+#define LAST_ESCALATOR_STAGE (ESCALATOR_STAGES - 1)
+
+static const u16 sEscalatorMetatiles_BottomNextRail[ESCALATOR_STAGES] = 
+{
+    METATILE_PokemonCenter_Escalator_BottomNextRail_Transition2, 
+    METATILE_PokemonCenter_Escalator_BottomNextRail_Transition1, 
+    METATILE_PokemonCenter_Escalator_BottomNextRail_Normal
+};
+
+static const u16 sEscalatorMetatiles_BottomRail[ESCALATOR_STAGES] = 
+{
+    METATILE_PokemonCenter_Escalator_BottomRail_Transition2, 
+    METATILE_PokemonCenter_Escalator_BottomRail_Transition1, 
+    METATILE_PokemonCenter_Escalator_BottomRail_Normal
+};
+
+static const u16 sEscalatorMetatiles_BottomNext[ESCALATOR_STAGES] = 
+{
+    METATILE_PokemonCenter_Escalator_BottomNext_Transition2, 
+    METATILE_PokemonCenter_Escalator_BottomNext_Transition1, 
+    METATILE_PokemonCenter_Escalator_BottomNext_Normal
+};
+
+static const u16 sEscalatorMetatiles_Bottom[ESCALATOR_STAGES] = 
+{
+    METATILE_PokemonCenter_Escalator_Bottom_Transition2, 
+    METATILE_PokemonCenter_Escalator_Bottom_Transition1, 
+    METATILE_PokemonCenter_Escalator_Bottom_Normal
+};
+
+static const u16 sEscalatorMetatiles_TopNext[ESCALATOR_STAGES] = 
+{
+    METATILE_PokemonCenter_Escalator_TopNext_Normal, 
+    METATILE_PokemonCenter_Escalator_TopNext_Transition1, 
+    METATILE_PokemonCenter_Escalator_TopNext_Transition2
+};
+
+static const u16 sEscalatorMetatiles_Top[ESCALATOR_STAGES] = 
+{
+    METATILE_PokemonCenter_Escalator_Top_Normal, 
+    METATILE_PokemonCenter_Escalator_Top_Transition1, 
+    METATILE_PokemonCenter_Escalator_Top_Transition2
+};
+
+static const u16 sEscalatorMetatiles_TopNextRail[ESCALATOR_STAGES] = 
+{
+    METATILE_PokemonCenter_Escalator_TopNextRail_Normal, 
+    METATILE_PokemonCenter_Escalator_TopNextRail_Transition1, 
+    METATILE_PokemonCenter_Escalator_TopNextRail_Transition2
+};
+
+#define tState            data[0]
+#define tTransitionStage  data[1]
+#define tGoingUp          data[2]
+#define tDrawingEscalator data[3]
+#define tPlayerX          data[4]
+#define tPlayerY          data[5]
+
+static void SetEscalatorMetatile(u8 taskId, const s16 *metatileIds, u16 metatileMasks)
+{
+    s16 x, y, transitionStage;
+    s16 i, j;
+    
+    x = gTasks[taskId].tPlayerX - 1;
+    y = gTasks[taskId].tPlayerY - 1;
+    transitionStage = gTasks[taskId].tTransitionStage;
+    
+    // Check all the escalator sections and only progress the selected one to the next stage
+    if (!gTasks[taskId].tGoingUp)
+    {
+        for (i = 0; i < 3; i++)
+        {
+            for (j = 0; j < 3; j++)
+            {
+                s32 id = MapGridGetMetatileIdAt(x + j, y + i);
+                
+                if (metatileIds[transitionStage] == (s16)id)
+                {
+                    if (transitionStage != LAST_ESCALATOR_STAGE)
+                        MapGridSetMetatileIdAt(x + j, y + i, metatileMasks | metatileIds[transitionStage + 1]);
+                    else
+                        MapGridSetMetatileIdAt(x + j, y + i, metatileMasks | metatileIds[0]);
+                }
+            }
+        }
+    }
+    else
+    {
+        for (i = 0; i < 3; i++)
+        {
+            for (j = 0; j < 3; j++)
+            {
+                s32 id = MapGridGetMetatileIdAt(x + j, y + i);
+
+                if (metatileIds[LAST_ESCALATOR_STAGE - transitionStage] == (s16)id)
+                {
+                    if (transitionStage != LAST_ESCALATOR_STAGE)
+                        MapGridSetMetatileIdAt(x + j, y + i, metatileMasks | metatileIds[1 - transitionStage]);
+                    else
+                        MapGridSetMetatileIdAt(x + j, y + i, metatileMasks | metatileIds[LAST_ESCALATOR_STAGE]);
+                }
+            }
+        }
+    }
+}
+
+static void Task_DrawEscalator(u8 taskId)
+{
+    s16 *data = gTasks[taskId].data;
+    u16 state;
+    
+    tDrawingEscalator = TRUE;
+
+    // Set tile for each section of the escalator in sequence for current transition stage
+    switch (tState)
+    {
+    case 0:
+        SetEscalatorMetatile(taskId, sEscalatorMetatiles_BottomNextRail, 0);
+        break;
+    case 1:
+        SetEscalatorMetatile(taskId, sEscalatorMetatiles_BottomRail, 0);
+        break;
+    case 2:
+        SetEscalatorMetatile(taskId, sEscalatorMetatiles_BottomNext, METATILE_COLLISION_MASK);
+        break;
+    case 3:
+        SetEscalatorMetatile(taskId, sEscalatorMetatiles_Bottom, 0);
+        break;
+    case 4:
+        SetEscalatorMetatile(taskId, sEscalatorMetatiles_TopNext, METATILE_COLLISION_MASK);
+        break;
+    case 5:
+        SetEscalatorMetatile(taskId, sEscalatorMetatiles_Top, 0);
+        break;
+    case 6:
+        SetEscalatorMetatile(taskId, sEscalatorMetatiles_TopNextRail, 0);
+    default:
+        break;
+    }
+    
+    tState = (tState + 1) & 7;
+    state = tState & 7;
+
+    // If all sections of the escalator have been set, draw map and progress to next stage
+    if (state == 0)
+    {
+        DrawWholeMapView();
+        tTransitionStage = (tTransitionStage + 1) % ESCALATOR_STAGES;
+        tDrawingEscalator = FALSE;
+    }
+}
+
+static u8 CreateEscalatorTask(bool16 goingUp)
+{
+    u8 taskId;
+    s16 *data;
+
+    taskId = CreateTask(Task_DrawEscalator, 0);
+    data = gTasks[taskId].data;
+    PlayerGetDestCoords(&tPlayerX, &tPlayerY);
+    tState = 0;
+    tTransitionStage = 0;
+    tGoingUp = goingUp;
+    Task_DrawEscalator(taskId);
+    return taskId;
+}
+
+void StartEscalator(bool8 goingUp)
+{
+    u8 taskId;
+    
+    taskId = CreateEscalatorTask(goingUp);
+    sEscalatorTaskId = taskId;
+}
+
+void StopEscalator(void)
+{
+    DestroyTask(sEscalatorTaskId);
+}
+
+bool8 IsEscalatorMoving(void)
+{    
+    if (gTasks[sEscalatorTaskId].tDrawingEscalator == FALSE)
+    {
+        if (gTasks[sEscalatorTaskId].tTransitionStage != LAST_ESCALATOR_STAGE)
+            return TRUE;
+        return FALSE;
+    }
+    else
+    {
+        return TRUE;
+    }
+}
+
+#undef tState
+#undef tTransitionStage
+#undef tGoingUp
+#undef tDrawingEscalator
+#undef tPlayerX
+#undef tPlayerY
+
+#define tTimer data[0]
+#define tState data[1]
+#define tX     data[2]
+#define tY     data[3]
+
+void AnimateTeleporterHousing(void)
+{
+    u8 taskId;
+    s16 *data;
+    
+    taskId = CreateTask(Task_DrawTeleporterHousing, 0);
+    gTasks[taskId].tTimer = 0;
+    gTasks[taskId].tState = 0;
+    data = gTasks[taskId].data;
+    PlayerGetDestCoords(&tX, &tY);
+
+    // Set the coords of whichever teleporter is being animated
+    // 0 for the right teleporter, 1 for the left teleporter
+    if (gSpecialVar_0x8004 == 0)
+    {
+        gTasks[taskId].tX += 6;
+        gTasks[taskId].tY -= 5;
+    }
+    else
+    {
+        gTasks[taskId].tX -= 1;
+        gTasks[taskId].tY -= 5;
+    }    
+}
+
+static void Task_DrawTeleporterHousing(u8 taskId)
+{
+    s16 *data = gTasks[taskId].data;
+    
+    if (tTimer == 0)
+    {
+        // Alternate the teleporter light / brightness of the teleporter door
+        if ((tState & 1) == 0)
+        {
+            MapGridSetMetatileIdAt(tX, tY, METATILE_SeaCottage_Teleporter_Light_Yellow | METATILE_COLLISION_MASK);
+            MapGridSetMetatileIdAt(tX, tY + 2, METATILE_SeaCottage_Teleporter_Door_HalfGlowing | METATILE_COLLISION_MASK);
+        }
+        else
+        {
+            MapGridSetMetatileIdAt(tX, tY, METATILE_SeaCottage_Teleporter_Light_Red | METATILE_COLLISION_MASK);
+            MapGridSetMetatileIdAt(tX, tY + 2, METATILE_SeaCottage_Teleporter_Door_FullGlowing | METATILE_COLLISION_MASK);
+        }
+        CurrentMapDrawMetatileAt(tX, tY);
+        CurrentMapDrawMetatileAt(tX, tY + 2);
+    }
+    
+    tTimer++;
+    if (tTimer != 16)
+        return;
+    
+    tTimer = 0;
+    tState++;
+    if (tState != 13)
+        return;
+    
+    MapGridSetMetatileIdAt(tX, tY, METATILE_SeaCottage_Teleporter_Light_Green | METATILE_COLLISION_MASK);
+    MapGridSetMetatileIdAt(tX, tY + 2, METATILE_SeaCottage_Teleporter_Door | METATILE_COLLISION_MASK);
+    CurrentMapDrawMetatileAt(tX, tY);
+    CurrentMapDrawMetatileAt(tX, tY + 2);
+    DestroyTask(taskId);
+}
+
+void AnimateTeleporterCable(void)
+{
+    u8 taskId;
+    s16 *data;
+    
+    taskId = CreateTask(Task_DrawTeleporterCable, 0);
+    gTasks[taskId].tTimer = 0;
+    gTasks[taskId].tState = 0;
+    data = gTasks[taskId].data;
+    PlayerGetDestCoords(&tX, &tY);
+    gTasks[taskId].tX += 4;
+    gTasks[taskId].tY -= 5;
+}
+
+static void Task_DrawTeleporterCable(u8 taskId)
+{
+    s16 *data = gTasks[taskId].data;
+    
+    if (tTimer == 0)
+    {
+        if (tState != 0)
+        {
+            // Set default cable tiles to clear the ball
+            MapGridSetMetatileIdAt(tX, tY, METATILE_SeaCottage_Teleporter_Cable_Top | METATILE_COLLISION_MASK);
+            MapGridSetMetatileIdAt(tX, tY + 1, METATILE_SeaCottage_Teleporter_Cable_Bottom | METATILE_COLLISION_MASK);
+            CurrentMapDrawMetatileAt(tX, tY);
+            CurrentMapDrawMetatileAt(tX, tY + 1);
+
+            // End after drawing 4 times (length of the cable)
+            if (tState == 4)
+            {
+                DestroyTask(taskId);
+                return;
+            }
+            
+            tX--;
+        }
+
+        // Draw the cable ball
+        MapGridSetMetatileIdAt(tX, tY, METATILE_SeaCottage_Teleporter_CableBall_Top | METATILE_COLLISION_MASK);
+        MapGridSetMetatileIdAt(tX, tY + 1, METATILE_SeaCottage_Teleporter_CableBall_Bottom | METATILE_COLLISION_MASK);
+        CurrentMapDrawMetatileAt(tX, tY);
+        CurrentMapDrawMetatileAt(tX, tY + 1);
+    }
+    
+    tTimer++;
+    if (tTimer == 4)
+    {
+        tTimer = 0;
+        tState++;
+    }
+}
+
+#undef tTimer
+#undef tState
+#undef tX
+#undef tY

sym_ewram.txt

@@ -235,7 +235,7 @@ gBagPockets: @ 203988C
 	.align 2
 	.include "src/shop.o"
 	.align 2
-	.include "src/sea_cottage_special_anim.o"
+	.include "src/special_field_anim.o"
 	.align 2
 	.include "src/script_menu.o"