diff options
Diffstat (limited to 'engine/predefs12.asm')
| -rwxr-xr-x | engine/predefs12.asm | 54 |
1 files changed, 30 insertions, 24 deletions
diff --git a/engine/predefs12.asm b/engine/predefs12.asm index f318447e..9731134f 100755 --- a/engine/predefs12.asm +++ b/engine/predefs12.asm @@ -4,62 +4,68 @@ ChangeBGPalColor0_4Frames: ; 480eb (12:40eb) ld a, [rBGP] or b ld [rBGP], a - ld c, 4 + ld c, $4 call DelayFrames ld a, [rBGP] and %11111100 ld [rBGP], a ret -Func_480ff: ; 480ff (12:40ff) +PredefShakeScreenVertically: ; 480ff (12:40ff) +; Moves the window down and then back in a sequence of progressively smaller +; numbers of pixels, starting at b. call GetPredefRegisters - ld a, $1 - ld [wd0a0], a + ld a, 1 + ld [wDisableVBlankWYUpdate], a xor a -.asm_48108 - ld [H_NUMTOPRINT], a ; (aliases: H_MULTIPLICAND) - call Func_48119 - call Func_48119 +.loop + ld [$ff96], a + call .MutateWY + call .MutateWY dec b ld a, b - jr nz, .asm_48108 + jr nz, .loop xor a - ld [wd0a0], a + ld [wDisableVBlankWYUpdate], a ret -Func_48119: ; 48119 (12:4119) - ld a, [H_NUMTOPRINT] ; (aliases: H_MULTIPLICAND) +.MutateWY ; 48119 (12:4119) + ld a, [$ff96] xor b - ld [H_NUMTOPRINT], a ; (aliases: H_MULTIPLICAND) + ld [$ff96], a ld [rWY], a ld c, 3 jp DelayFrames -Func_48125: ; 48125 (12:4125) +PredefShakeScreenHorizontally: ; 48125 (12:4125) +; Moves the window right and then back in a sequence of progressively smaller +; numbers of pixels, starting at b. call GetPredefRegisters xor a -.asm_48129 +.loop ld [$ff97], a - call Func_4813f + call .MutateWX ld c, 1 call DelayFrames - call Func_4813f + call .MutateWX dec b ld a, b - jr nz, .asm_48129 - ld a, $7 + jr nz, .loop + +; restore normal WX + ld a, 7 ld [rWX], a ret -Func_4813f: ; 4813f (12:413f) +.MutateWX ; 4813f (12:413f) ld a, [$ff97] xor b ld [$ff97], a bit 7, a - jr z, .asm_48149 - xor a -.asm_48149 - add $7 + jr z, .skipZeroing + xor a ; zero a if it's negative +.skipZeroing + add 7 ld [rWX], a ld c, 4 jp DelayFrames |