diff options
Diffstat (limited to 'engine/predefsA.asm')
| -rw-r--r-- | engine/predefsA.asm | 73 |
1 files changed, 0 insertions, 73 deletions
diff --git a/engine/predefsA.asm b/engine/predefsA.asm deleted file mode 100644 index e25735c5..00000000 --- a/engine/predefsA.asm +++ /dev/null @@ -1,73 +0,0 @@ -; inverts the BGP for 4 (6 on CGB due to lag) frames -ChangeBGPalColor0_4Frames: - call GetPredefRegisters ; leftover of red/blue, has no use here - ld a, [rBGP] - xor $ff - ld [rBGP], a - call UpdateGBCPal_BGP - ld c, 4 - call DelayFrames - ld a, [rBGP] - xor $ff - ld [rBGP], a - call UpdateGBCPal_BGP - ret - -PredefShakeScreenVertically: -; Moves the window down and then back in a sequence of progressively smaller -; numbers of pixels, starting at b. - call GetPredefRegisters - ld a, 1 - ld [wDisableVBlankWYUpdate], a - xor a -.loop - ld [$ff96], a - call .MutateWY - call .MutateWY - dec b - ld a, b - jr nz, .loop - xor a - ld [wDisableVBlankWYUpdate], a - ret - -.MutateWY - ld a, [$ff96] - xor b - ld [$ff96], a - ld [rWY], a - ld c, 3 - jp DelayFrames - -PredefShakeScreenHorizontally: -; Moves the window right and then back in a sequence of progressively smaller -; numbers of pixels, starting at b. - call GetPredefRegisters - xor a -.loop - ld [$ff97], a - call .MutateWX - ld c, 1 - call DelayFrames - call .MutateWX - dec b - ld a, b - jr nz, .loop - -; restore normal WX - ld a, 7 - ld [rWX], a - ret - -.MutateWX - ld a, [$ff97] - xor b - ld [$ff97], a - bit 7, a - jr z, .skipZeroing - xor a ; zero a if it's negative -.skipZeroing - add 7 - ld [rWX], a - ld c, 4 - jp DelayFrames |