From 3b78407194676f853777a01819f759366bb842de Mon Sep 17 00:00:00 2001
From: Marcus Huderle <huderlem@gmail.com>
Date: Thu, 24 Sep 2020 19:33:15 -0500
Subject: Decompile itemOnGround.c

---
 src/code_0808091C.c | 75 +++++++++++++++++++++++++++++++++++++++++++++++++++--
 1 file changed, 73 insertions(+), 2 deletions(-)

(limited to 'src/code_0808091C.c')

diff --git a/src/code_0808091C.c b/src/code_0808091C.c
index dcb86728..ae04dcad 100644
--- a/src/code_0808091C.c
+++ b/src/code_0808091C.c
@@ -5,10 +5,12 @@
 #include "room.h"
 
 extern void sub_0805E5A8();
+extern void sub_08080BC4(void);
 
 extern RoomControls gRoomControls;
 extern u32 gUnk_0200B650;
 extern u32 gUnk_02025EB0;
+extern u8 gUnk_02000070;
 
 extern void DoExitTransition(ScreenTransitionData*);
 extern void sub_080809D4();
@@ -53,7 +55,6 @@ void sub_08080930(void)
 }
 
 u32* GetLayerByIndex(u32 param_1)
-
 {
 
     if (param_1 == 2) {
@@ -64,9 +65,79 @@ u32* GetLayerByIndex(u32 param_1)
 }
 
 void sub_08080964(u16 time, u32 magnitude)
-
 {
     gRoomControls.screenShakeTime = time;
     gRoomControls.screenShakeMagnitude = magnitude & 7;
     return;
 }
+
+void sub_08080974(u32 arg0, u32 arg1) {
+    u32 var0, var1;
+    RoomControls* roomControls = &gRoomControls;
+
+    var0 = roomControls->roomOriginX;
+    if (arg0 <= var0 + 120) {
+        roomControls->roomScrollX = var0;
+    } else {
+        var0 += roomControls->width;
+        var1 = var0 - 120;
+        if (arg0 < var1) {
+            var1 = arg0;
+        }
+        roomControls->roomScrollX = var1 - 120;
+    }
+
+    var0 = roomControls->roomOriginY;
+    if (arg1 <= var0 + 80) {
+        roomControls->roomScrollY = var0;
+    } else {
+        var0 += roomControls->height;
+        var1 = var0 - 80;
+        if (arg1 < var1) {
+            var1 = arg1;
+        }
+        roomControls->roomScrollY = var1 - 80;
+    }
+
+    sub_080809D4();
+    gUnk_02000070 = 1;
+}
+
+void sub_080809D4(void) {
+    register Entity* target asm("r4");
+    int x, y;
+    int var1, var0;
+    RoomControls* roomControls = &gRoomControls;
+    roomControls->unk6 &= 0xFB;
+
+    target = roomControls->cameraTarget;
+    x = target->x.HALF.HI;
+    var0 = roomControls->roomOriginX;
+    if (x <= var0 + 120) {
+        roomControls->roomScrollX = var0;
+    } else {
+        var0 += roomControls->width;
+        var1 = var0 - 120;
+        if (x < var1) {
+            var1 = (u16)target->x.HALF.HI;
+        }
+        roomControls->roomScrollX = var1 - 120;
+    }
+
+    target = roomControls->cameraTarget;
+    y = target->y.HALF.HI;
+    var0 = roomControls->roomOriginY;
+    if (y <= var0 + 80) {
+        roomControls->roomScrollY = var0;
+    } else {
+        var0 += roomControls->height;
+        var1 = var0 - 80;
+        if (y < var1) {
+            var1 = (u16)target->y.HALF.HI;
+        }
+        roomControls->roomScrollY = var1 - 80;
+    }
+
+    sub_08080BC4();
+    gUnk_02000070 = 1;
+}
-- 
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