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Merged
MatyMeatBoy merged 1 commit into from
Nov 4, 2026
Merged

Decompile sub_0800AD04 (camera clamp) #408

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177 changes: 0 additions & 177 deletions asm/nonmatchings/code_08009088/sub_0800AD04.s
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113 changes: 47 additions & 66 deletions src/code_08009088.c
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Original file line number Diff line number Diff line change
Expand Up @@ -1056,76 +1056,57 @@ void sub_0800A998(void)
t06_sysA998.flags = 0x80000000;
}

#ifdef NONMATCHING
struct T06SysAD04 {u8 pad[0x70];u16 w,h,w1,h1,mapW,mapH;s16 x,y;u16 offX,offY,pad84,pad86,relX,relY;u8 pad8C[16];u32 flags;};
extern struct T06SysAD04 t06_sysAD04 asm("gUnk_03003170");
static inline void t06_finishAD04(struct T06SysAD04 *base)
struct CameraAD04 {
u8 pad00[0x70];
u16 w70, w72, w74, w76;
u8 pad78[4];
s16 x, y;
u16 baseX, baseY;
u8 pad84[4];
u16 relX, relY;
u8 pad8C[0x10];
u32 flags;
};
extern struct CameraAD04 cameraAD04 asm("gUnk_03003170");

u32 sub_0800AD04(u32 *px, u32 *py, u32 alt)
{
register struct T06SysAD04 *saved asm("ip")=base;
register s16 *x asm("r4")=&saved->x;
register s16 *y asm("r5");
if(*x<0)*x=0;
y=&saved->y;
if(*y<0)*y=0;
if(!(saved->flags&16)) {
saved->relX=(u16)*x-saved->offX;
saved->relY=(u16)*y-saved->offY;
u32 dx = (u16)(*px >> 8);
u32 dy = (u16)(*py >> 8);

if (!(cameraAD04.flags & 0x10)) {
cameraAD04.x = cameraAD04.baseX + ((s32)(dx << 16) >> 16) - 0x78;
cameraAD04.y = cameraAD04.baseY + ((s32)(dy << 16) >> 16) - 0x60;
}
if (alt) {
if (cameraAD04.x > (cameraAD04.w74 - 0x1e) * 8)
cameraAD04.x = (cameraAD04.w74 - 0x1e) * 8;
if (cameraAD04.y > (cameraAD04.w76 - 0x14) * 8)
cameraAD04.y = (cameraAD04.w76 - 0x14) * 8;
} else {
*x=base->offX+base->relX;
{register u32 offset asm("r4")=0x82;u32 other;register u32 value asm("r1");
value=base->relY; asm("" : "+r"(offset), "+r"(value));
other=*(u16 *)(offset+(u32)base); *y=value+other;}
}
}
static inline u16 *t06_offsetAD04(u16 *p,u16 offset) {return (u16 *)((u8 *)p+offset);}
s32 sub_0800AD04(s32 *px,s32 *py,s32 layer)
{
register s32 *result asm("r0")=px;
u32 x=((u32)*px<<8)>>16;
u32 y=((u32)*py<<8)>>16;
register struct T06SysAD04 *sys asm("r3")=&t06_sysAD04;
register s32 max asm("r1");
register u16 *height asm("r1");
register s16 *scroll asm("r4");
register s32 current asm("r2");
if(!(sys->flags&16)) {
register u16 *offset asm("r2")=&sys->offX;
register u32 temp asm("r5")=x;
register s32 value asm("r1")=(s16)temp;
value+=*offset;value-=120;
offset=(u16 *)&sys->x;
*offset=value;
offset=t06_offsetAD04(offset,6);
temp=y;value=(s16)temp;
{register u16 loaded asm("r2")=*(volatile u16 *)offset;value+=loaded;}value-=96;
offset=(u16 *)&sys->y;
*offset=value;
}
if(layer) {
scroll=&sys->x;current=*scroll;
max=(sys->w1-30)*8;
if(current>max)*scroll=max;
scroll=&sys->y;current=*scroll;
height=&sys->h1;
if (cameraAD04.x > (cameraAD04.w70 - 0x1e) * 8)
cameraAD04.x = (cameraAD04.w70 - 0x1e) * 8;
if (cameraAD04.y > (cameraAD04.w72 - 0x14) * 8)
cameraAD04.y = (cameraAD04.w72 - 0x14) * 8;
}
if (cameraAD04.x < 0)
cameraAD04.x = 0;
if (cameraAD04.y < 0)
cameraAD04.y = 0;
if (!(cameraAD04.flags & 0x10)) {
cameraAD04.relX = cameraAD04.x - cameraAD04.baseX;
cameraAD04.relY = cameraAD04.y - cameraAD04.baseY;
} else {
scroll=&sys->x;current=*scroll;
max=(sys->w-30)*8;
if(current>max)*scroll=max;
scroll=&sys->y;current=*scroll;
height=&sys->h;
}
max=(*height-20)*8;
if(current>max)*scroll=max;
t06_finishAD04(sys);
{u32 lowX=(u8)*px;
u32 lowY=(u8)*py;
*px=lowX+((s32)(x<<16)>>8);
*py=lowY+((s32)(y<<16)>>8);}
return (s32)result;
cameraAD04.x = cameraAD04.baseX + cameraAD04.relX;
cameraAD04.y = cameraAD04.baseY + cameraAD04.relY;
}
{
u32 lowX = (u8)*px;
u32 lowY = (u8)*py;
*px = lowX + ((s16)dx << 8);
*py = lowY + ((s16)dy << 8);
}
}
#else
INCLUDE_ASM("asm/nonmatchings/code_08009088", sub_0800AD04);
#endif
extern u32 t06_resourcesAE50[] asm("gUnk_0847846C");
static inline u32 t06_resourceAE50(u32 index,u16 offset)
{
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