permanent terrain move bgs

data/battle_anim_scripts.s

@@ -815,6 +815,7 @@ gBattleAnims_General::
 	.4byte General_IllusionOff
 	.4byte General_FormChange
 	.4byte General_SlideOffScreen
+	.4byte General_RestoreBg
 
 	.align 2
 gBattleAnims_Special::
@@ -8453,6 +8454,8 @@ Move_GRASSY_TERRAIN::
 	delay 4
 	createvisualtask AnimTask_BlendBattleAnimPal, 10, ANIM_PAL_BG, 3, 4, 0, RGB(31, 24, 31)
 	waitforvisualfinish
+	restorebg
+	waitbgfadein
 	end
 
 Move_MISTY_TERRAIN::
@@ -8491,6 +8494,8 @@ Move_MISTY_TERRAIN::
 	delay 4
 	createvisualtask AnimTask_BlendBattleAnimPal, 10, ANIM_PAL_BG, 3, 7, 0, RGB(31, 24, 31)
 	waitforvisualfinish
+	restorebg
+	waitbgfadein
 	end
 
 Move_ELECTRIFY::
@@ -9374,6 +9379,8 @@ Move_ELECTRIC_TERRAIN::
 	delay 2
 	createvisualtask AnimTask_BlendBattleAnimPal, 10, ANIM_PAL_BG, 3, 4, 0, RGB(28, 28, 0)
 	waitforvisualfinish
+	restorebg
+	waitbgfadein
 	end
 
 Move_DAZZLING_GLEAM::
@@ -11027,6 +11034,8 @@ Move_PSYCHIC_TERRAIN::
 	delay 4
 	createvisualtask AnimTask_BlendBattleAnimPal, 10, ANIM_PAL_BG, 3, 4, 0, RGB(27, 0, 13)
 	waitforvisualfinish
+	restorebg
+	waitbgfadein
 	end
 
 Move_LUNGE::
@@ -24320,6 +24329,11 @@ General_TerrainElectric:
 General_TerrainPsychic:
 	end
 
+General_RestoreBg:
+	restorebg
+	waitbgfadein
+	end
+
 SnatchMoveTrySwapFromSubstitute:
 	createvisualtask AnimTask_IsAttackerBehindSubstitute, 2
 	jumprettrue SnatchMoveSwapSubstituteForMon

data/battle_scripts_1.s

@@ -5426,21 +5426,25 @@ BattleScript_MagicRoomEnds::
 BattleScript_ElectricTerrainEnds::
 	printstring STRINGID_ELECTRICTERRAINENDS
 	waitmessage 0x40
+	playanimation BS_ATTACKER, B_ANIM_RESTORE_BG, NULL
 	end2
 
 BattleScript_MistyTerrainEnds::
 	printstring STRINGID_MISTYTERRAINENDS
 	waitmessage 0x40
+	playanimation BS_ATTACKER, B_ANIM_RESTORE_BG, NULL
 	end2
 
 BattleScript_GrassyTerrainEnds::
 	printstring STRINGID_GRASSYTERRAINENDS
 	waitmessage 0x40
+	playanimation BS_ATTACKER, B_ANIM_RESTORE_BG, NULL
 	end2
 
 BattleScript_PsychicTerrainEnds::
 	printstring STRINGID_PSYCHICTERRAINENDS
 	waitmessage 0x40
+	playanimation BS_ATTACKER, B_ANIM_RESTORE_BG, NULL
 	end2
 
 BattleScript_MudSportEnds::

include/battle_anim.h

@@ -68,6 +68,7 @@ s16 KeepPanInRange(s16 a, int oldPan);
 s16 CalculatePanIncrement(s16 sourcePan, s16 targetPan, s16 incrementPan);
 void sub_80A4720(u16 a, u16 *b, u32 c, u8 d);
 void sub_80A477C(bool8);
+void LoadMoveBg(u16 bgId);
 
 // battle_intro.c
 void SetAnimBgAttribute(u8 bgId, u8 attributeId, u8 value);

include/battle_bg.h

@@ -9,5 +9,6 @@ void LoadBattleTextboxAndBackground(void);
 void InitLinkBattleVsScreen(u8 taskId);
 void DrawBattleEntryBackground(void);
 bool8 LoadChosenBattleElement(u8 caseId);
+void DrawTerrainTypeBattleBackground(void);
 
 #endif // GUARD_BATTLE_BG_H

include/constants/battle.h

@@ -234,6 +234,8 @@
 #define STATUS_FIELD_ION_DELUGE         0x400
 #define STATUS_FIELD_FAIRY_LOCK         0x800
 
+#define STATUS_TERRAIN_ANY              (STATUS_FIELD_GRASSY_TERRAIN | STATUS_FIELD_MISTY_TERRAIN | STATUS_FIELD_ELECTRIC_TERRAIN | STATUS_FIELD_PSYCHIC_TERRAIN)
+
 // Flags describing move's result
 #define MOVE_RESULT_MISSED             (1 << 0)
 #define MOVE_RESULT_SUPER_EFFECTIVE    (1 << 1)

include/constants/battle_anim.h

@@ -525,6 +525,7 @@
 #define B_ANIM_ILLUSION_OFF             0x1C
 #define B_ANIM_FORM_CHANGE              0x1D
 #define B_ANIM_SLIDE_OFFSCREEN          0x1E // for Emergency Exit
+#define B_ANIM_RESTORE_BG               0x1F // for Terrain Endings
 
 // special animations table
 #define B_ANIM_LVL_UP                   0x0

src/battle_anim.c

@@ -88,7 +88,6 @@ static void Task_PanFromInitialToTarget(u8 taskId);
 static void Task_LoopAndPlaySE(u8 taskId);
 static void Task_WaitAndPlaySE(u8 taskId);
 static void LoadDefaultBg(void);
-static void LoadMoveBg(u16 bgId);
 
 // ewram
 EWRAM_DATA static const u8 *sBattleAnimScriptPtr = NULL;
@@ -3177,7 +3176,7 @@ static void Task_FadeToBg(u8 taskId)
     }
 }
 
-static void LoadMoveBg(u16 bgId)
+void LoadMoveBg(u16 bgId)
 {
     if (IsContest())
     {
@@ -3205,6 +3204,8 @@ static void LoadDefaultBg(void)
 {
     if (IsContest())
         LoadContestBgAfterMoveAnim();
+    else if (gFieldStatuses & STATUS_TERRAIN_ANY)
+        DrawTerrainTypeBattleBackground();
     else
         DrawMainBattleBackground();
 }

src/battle_bg.c

@@ -1,5 +1,6 @@
 #include "global.h"
 #include "battle.h"
+#include "battle_anim.h"
 #include "battle_bg.h"
 #include "battle_main.h"
 #include "battle_message.h"
@@ -23,6 +24,7 @@
 #include "constants/map_types.h"
 #include "constants/songs.h"
 #include "constants/trainers.h"
+#include "constants/battle_anim.h"
 
 struct BattleBackground
 {
@@ -1413,3 +1415,26 @@ bool8 LoadChosenBattleElement(u8 caseId)
 
     return ret;
 }
+
+void DrawTerrainTypeBattleBackground(void)
+{
+    switch (gFieldStatuses & STATUS_TERRAIN_ANY)
+    {
+    case STATUS_FIELD_GRASSY_TERRAIN:
+        LoadMoveBg(BG_GRASSY_TERRAIN);
+        break;
+    case STATUS_FIELD_MISTY_TERRAIN:
+        LoadMoveBg(BG_MISTY_TERRAIN);
+        break;
+    case STATUS_FIELD_ELECTRIC_TERRAIN:
+        LoadMoveBg(BG_ELECTRIC_TERRAIN);
+        break;
+    case STATUS_FIELD_PSYCHIC_TERRAIN:
+        LoadMoveBg(BG_PSYCHIC_TERRAIN);
+        break;
+    default:
+        DrawMainBattleBackground();
+        break;
+    }
+}
+

src/battle_script_commands.c

@@ -6952,7 +6952,7 @@ static void HandleTerrainMove(u32 moveEffect)
     }
     else
     {
-        gFieldStatuses &= ~(STATUS_FIELD_MISTY_TERRAIN | STATUS_FIELD_GRASSY_TERRAIN | STATUS_FIELD_ELECTRIC_TERRAIN | STATUS_FIELD_PSYCHIC_TERRAIN);
+        gFieldStatuses &= ~STATUS_TERRAIN_ANY;
         gFieldStatuses |= statusFlag;
         if (GetBattlerHoldEffect(gBattlerAttacker, TRUE) == HOLD_EFFECT_TERRAIN_EXTENDER)
             *timer = 8;