dionmoustos/PokemonEmeraldSafariFrontier
1
0
Fork 0
Code Issues 21 Pull Requests Actions Packages Projects Releases Wiki Activity

through sub_81237B4

Browse Source
This commit is contained in:
PikalaxALT
2017-10-30 08:46:36 -04:00
parent 474df27136
commit f6a55433a2
3 changed files with 29 additions and 80 deletions
Download Patch File Download Diff File Expand all files Collapse all files

32
src/region_map.c
View File

@@ -3,6 +3,7 @@
#include "global.h"
#include "main.h"
#include "menu.h"
#include "gpu_regs.h"
#include "palette.h"
#include "trig.h"
#include "region_map.h"
@@ -454,17 +455,40 @@ void CalcZoomScrollParams(s16 scrollX, s16 scrollY, s16 c, s16 d, u16 e, u16 f,
s32 var4;
gRegionMap->bg2pa = e * gSineTable[rotation + 64] >> 8;
gRegionMap->bg2pb = e * -gSineTable[rotation] >> 8;
gRegionMap->bg2pc = f * gSineTable[rotation] >> 8;
gRegionMap->bg2pc = e * -gSineTable[rotation] >> 8;
gRegionMap->bg2pb = f * gSineTable[rotation] >> 8;
gRegionMap->bg2pd = f * gSineTable[rotation + 64] >> 8;
var1 = (scrollX << 8) + (c << 8);
var2 = d * gRegionMap->bg2pc + gRegionMap->bg2pa * c;
var2 = d * gRegionMap->bg2pb + gRegionMap->bg2pa * c;
gRegionMap->bg2x = var1 - var2;
var3 = (scrollY << 8) + (d << 8);
var4 = gRegionMap->bg2pd * d + gRegionMap->bg2pb * c;
var4 = gRegionMap->bg2pd * d + gRegionMap->bg2pc * c;
gRegionMap->bg2y = var3 - var4;
gRegionMap->needUpdateVideoRegs = TRUE;
}
void sub_812378C(s16 x, s16 y)
{
gRegionMap->bg2x = (x << 8) + 0x1c00;
gRegionMap->bg2y = (y << 8) + 0x2400;
gRegionMap->needUpdateVideoRegs = TRUE;
}
void sub_81237B4(void)
{
if (gRegionMap->needUpdateVideoRegs)
{
SetGpuReg(REG_OFFSET_BG2PA, gRegionMap->bg2pa);
SetGpuReg(REG_OFFSET_BG2PB, gRegionMap->bg2pb);
SetGpuReg(REG_OFFSET_BG2PC, gRegionMap->bg2pc);
SetGpuReg(REG_OFFSET_BG2PD, gRegionMap->bg2pd);
SetGpuReg(REG_OFFSET_BG2X_L, gRegionMap->bg2x);
SetGpuReg(REG_OFFSET_BG2X_H, gRegionMap->bg2x >> 16);
SetGpuReg(REG_OFFSET_BG2Y_L, gRegionMap->bg2y);
SetGpuReg(REG_OFFSET_BG2Y_H, gRegionMap->bg2y >> 16);
gRegionMap->needUpdateVideoRegs = FALSE;
}
}