From 69b4bd89987a0181baac89ff39a67411af78794f Mon Sep 17 00:00:00 2001
From: Alejandro Asenjo <96613413+sonicdcer@users.noreply.github.com>
Date: Mon, 11 Jul 2022 23:10:29 -0300
Subject: [PATCH] ovl_Bg_F40_Flift decompiled (#885)

* ovl_Bg_F40_Flift decompiled

* format

* pr reviews

* pr review
---
 spec                                          |  3 +-
 .../actors/ovl_Bg_F40_Flift/z_bg_f40_flift.c  | 66 +++++++++++++++----
 .../actors/ovl_Bg_F40_Flift/z_bg_f40_flift.h  |  7 +-
 3 files changed, 57 insertions(+), 19 deletions(-)

diff --git a/spec b/spec
index b5c806fb9c..f2a7ad9cd2 100644
--- a/spec
+++ b/spec
@@ -1129,8 +1129,7 @@ beginseg
     name "ovl_Bg_F40_Flift"
     compress
     include "build/src/overlays/actors/ovl_Bg_F40_Flift/z_bg_f40_flift.o"
-    include "build/data/ovl_Bg_F40_Flift/ovl_Bg_F40_Flift.data.o"
-    include "build/data/ovl_Bg_F40_Flift/ovl_Bg_F40_Flift.reloc.o"
+    include "build/src/overlays/actors/ovl_Bg_F40_Flift/ovl_Bg_F40_Flift_reloc.o"
 endseg
 
 beginseg
diff --git a/src/overlays/actors/ovl_Bg_F40_Flift/z_bg_f40_flift.c b/src/overlays/actors/ovl_Bg_F40_Flift/z_bg_f40_flift.c
index 4e323cbf92..3974b2fc53 100644
--- a/src/overlays/actors/ovl_Bg_F40_Flift/z_bg_f40_flift.c
+++ b/src/overlays/actors/ovl_Bg_F40_Flift/z_bg_f40_flift.c
@@ -5,6 +5,7 @@
  */
 
 #include "z_bg_f40_flift.h"
+#include "objects/object_f40_obj/object_f40_obj.h"
 
 #define FLAGS (ACTOR_FLAG_10)
 
@@ -15,7 +16,9 @@ void BgF40Flift_Destroy(Actor* thisx, PlayState* play);
 void BgF40Flift_Update(Actor* thisx, PlayState* play);
 void BgF40Flift_Draw(Actor* thisx, PlayState* play);
 
-#if 0
+void func_808D75F0(BgF40Flift* this, PlayState* play);
+void func_808D7714(BgF40Flift* this, PlayState* play);
+
 const ActorInit Bg_F40_Flift_InitVars = {
     ACTOR_BG_F40_FLIFT,
     ACTORCAT_BG,
@@ -28,28 +31,65 @@ const ActorInit Bg_F40_Flift_InitVars = {
     (ActorFunc)BgF40Flift_Draw,
 };
 
-// static InitChainEntry sInitChain[] = {
-static InitChainEntry D_808D7830[] = {
+static InitChainEntry sInitChain[] = {
     ICHAIN_F32(uncullZoneScale, 400, ICHAIN_CONTINUE),
     ICHAIN_F32(uncullZoneForward, 5000, ICHAIN_CONTINUE),
     ICHAIN_VEC3F_DIV1000(scale, 100, ICHAIN_STOP),
 };
 
-#endif
+void BgF40Flift_Init(Actor* thisx, PlayState* play) {
+    BgF40Flift* this = THIS;
 
-extern InitChainEntry D_808D7830[];
+    Actor_ProcessInitChain(&this->dyna.actor, sInitChain);
+    DynaPolyActor_Init(&this->dyna, 1);
+    DynaPolyActor_LoadMesh(play, &this->dyna, &object_f40_obj_Colheader_004240);
+    this->dyna.actor.params = 1;
+    this->actionFunc = func_808D75F0;
+}
 
-extern UNK_TYPE D_06004038;
-extern UNK_TYPE D_06004240;
+void BgF40Flift_Destroy(Actor* thisx, PlayState* play) {
+    BgF40Flift* this = THIS;
 
-#pragma GLOBAL_ASM("asm/non_matchings/overlays/ovl_Bg_F40_Flift/BgF40Flift_Init.s")
+    DynaPoly_DeleteBgActor(play, &play->colCtx.dyna, this->dyna.bgId);
+}
 
-#pragma GLOBAL_ASM("asm/non_matchings/overlays/ovl_Bg_F40_Flift/BgF40Flift_Destroy.s")
+void func_808D75F0(BgF40Flift* this, PlayState* play) {
+    if (((this->dyna.actor.params == 1) && (DynaPolyActor_IsInRidingMovingState(&this->dyna))) ||
+        ((this->dyna.actor.params == -1) && (!DynaPolyActor_IsInRidingMovingState(&this->dyna)))) {
+        this->timer = 96;
+        this->actionFunc = func_808D7714;
+    } else {
+        if (this->timer == 0) {
+            this->timer = 48;
+        }
+        this->timer--;
+        if (this->dyna.actor.params == 1) {
+            this->dyna.actor.world.pos.y = (sin_rad(this->timer * (M_PI / 24.0f)) * 5.0f) + this->dyna.actor.home.pos.y;
+        } else {
+            this->dyna.actor.world.pos.y =
+                (sin_rad(this->timer * (M_PI / 24.0f)) * 5.0f) + (926.8f + this->dyna.actor.home.pos.y);
+        }
+    }
+}
 
-#pragma GLOBAL_ASM("asm/non_matchings/overlays/ovl_Bg_F40_Flift/func_808D75F0.s")
+void func_808D7714(BgF40Flift* this, PlayState* play) {
+    if (this->timer != 0) {
+        this->timer--;
+        this->dyna.actor.world.pos.y =
+            (((cos_rad(this->timer * (M_PI / 96.0f)) * this->dyna.actor.params) + 1.0f) * 463.4f) +
+            this->dyna.actor.home.pos.y;
+    } else {
+        this->dyna.actor.params = -this->dyna.actor.params;
+        this->actionFunc = func_808D75F0;
+    }
+}
 
-#pragma GLOBAL_ASM("asm/non_matchings/overlays/ovl_Bg_F40_Flift/func_808D7714.s")
+void BgF40Flift_Update(Actor* thisx, PlayState* play) {
+    BgF40Flift* this = THIS;
 
-#pragma GLOBAL_ASM("asm/non_matchings/overlays/ovl_Bg_F40_Flift/BgF40Flift_Update.s")
+    this->actionFunc(this, play);
+}
 
-#pragma GLOBAL_ASM("asm/non_matchings/overlays/ovl_Bg_F40_Flift/BgF40Flift_Draw.s")
+void BgF40Flift_Draw(Actor* thisx, PlayState* play) {
+    Gfx_DrawDListOpa(play, object_f40_obj_DL_004038);
+}
diff --git a/src/overlays/actors/ovl_Bg_F40_Flift/z_bg_f40_flift.h b/src/overlays/actors/ovl_Bg_F40_Flift/z_bg_f40_flift.h
index 5aa6b46602..95b2e9073a 100644
--- a/src/overlays/actors/ovl_Bg_F40_Flift/z_bg_f40_flift.h
+++ b/src/overlays/actors/ovl_Bg_F40_Flift/z_bg_f40_flift.h
@@ -8,10 +8,9 @@ struct BgF40Flift;
 typedef void (*BgF40FliftActionFunc)(struct BgF40Flift*, PlayState*);
 
 typedef struct BgF40Flift {
-    /* 0x0000 */ Actor actor;
-    /* 0x0144 */ char unk_144[0x18];
-    /* 0x015C */ BgF40FliftActionFunc actionFunc;
-    /* 0x0160 */ char unk_160[0x4];
+    /* 0x000 */ DynaPolyActor dyna;
+    /* 0x15C */ BgF40FliftActionFunc actionFunc;
+    /* 0x160 */ s32 timer;
 } BgF40Flift; // size = 0x164
 
 extern const ActorInit Bg_F40_Flift_InitVars;