diff options
Diffstat (limited to 'engine/predefs12.asm')
| -rwxr-xr-x | engine/predefs12.asm | 68 |
1 files changed, 37 insertions, 31 deletions
diff --git a/engine/predefs12.asm b/engine/predefs12.asm index 90032a14..95f0ea25 100755 --- a/engine/predefs12.asm +++ b/engine/predefs12.asm @@ -1,65 +1,71 @@ ; b = new colour for BG colour 0 (usually white) for 4 frames -ChangeBGPalColor0_4Frames: ; 480eb (12:40eb) +ChangeBGPalColor0_4Frames: call GetPredefRegisters 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: +; 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 ; $ff96 (aliases: H_MULTIPLICAND) - call Func_48119 - call Func_48119 +.loop + ld [$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] ; $ff96 (aliases: H_MULTIPLICAND) +.MutateWY + ld a, [$ff96] xor b - ld [H_NUMTOPRINT], a ; $ff96 (aliases: H_MULTIPLICAND) - ld [rWY], a ; $ff4a - ld c, $3 + ld [$ff96], a + ld [rWY], a + ld c, 3 jp DelayFrames -Func_48125: ; 48125 (12:4125) +PredefShakeScreenHorizontally: +; 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 - ld c, $1 + call .MutateWX + ld c, 1 call DelayFrames - call Func_4813f + call .MutateWX dec b ld a, b - jr nz, .asm_48129 - ld a, $7 - ld [rWX], a ; $ff4b + jr nz, .loop + +; restore normal WX + ld a, 7 + ld [rWX], a ret -Func_4813f: ; 4813f (12:413f) +.MutateWX ld a, [$ff97] xor b ld [$ff97], a bit 7, a - jr z, .asm_48149 - xor a -.asm_48149 - add $7 - ld [rWX], a ; $ff4b - ld c, $4 + jr z, .skipZeroing + xor a ; zero a if it's negative +.skipZeroing + add 7 + ld [rWX], a + ld c, 4 jp DelayFrames |