ref: 9cfae346587676e8f7b345a41b0b55734da2dd23
dir: /engine/movie/splash.asm/
LoadShootingStarGraphics: ld a, $f9 ldh [rOBP0], a ld a, $a4 ldh [rOBP1], a ld de, AnimationTileset2 tile 3 ; star tile (top left quadrant) ld hl, vChars1 tile $20 lb bc, BANK(AnimationTileset2), 1 call CopyVideoData ld de, AnimationTileset2 tile 19 ; star tile (bottom left quadrant) ld hl, vChars1 tile $21 lb bc, BANK(AnimationTileset2), 1 call CopyVideoData ld de, FallingStar ld hl, vChars1 tile $22 lb bc, BANK(FallingStar), (FallingStarEnd - FallingStar) / $10 call CopyVideoData ld hl, GameFreakLogoOAMData ld de, wOAMBuffer + $60 ld bc, GameFreakLogoOAMDataEnd - GameFreakLogoOAMData call CopyData ld hl, GameFreakShootingStarOAMData ld de, wOAMBuffer ld bc, GameFreakShootingStarOAMDataEnd - GameFreakShootingStarOAMData jp CopyData AnimateShootingStar: call LoadShootingStarGraphics ld a, SFX_SHOOTING_STAR call PlaySound ; Move the big star down and left across the screen. ld hl, wOAMBuffer lb bc, $a0, $4 .bigStarLoop push hl push bc .bigStarInnerLoop ld a, [hl] ; Y add 4 ld [hli], a ld a, [hl] ; X add -4 ld [hli], a inc hl inc hl dec c jr nz, .bigStarInnerLoop ld c, 1 call CheckForUserInterruption pop bc pop hl ret c ld a, [hl] cp 80 jr nz, .next jr .bigStarLoop .next cp b jr nz, .bigStarLoop ; Clear big star OAM. ld hl, wOAMBuffer ld c, 4 ld de, 4 .clearOAMLoop ld [hl], 160 add hl, de dec c jr nz, .clearOAMLoop ; Make Gamefreak logo flash. ld b, 3 .flashLogoLoop ld hl, rOBP0 rrc [hl] rrc [hl] ld c, 10 call CheckForUserInterruption ret c dec b jr nz, .flashLogoLoop ; Copy 24 instances of the small stars OAM data. ; Note that their coordinates put them off-screen. ld de, wOAMBuffer ld a, 24 .initSmallStarsOAMLoop push af ld hl, SmallStarsOAM ld bc, SmallStarsOAMEnd - SmallStarsOAM call CopyData pop af dec a jr nz, .initSmallStarsOAMLoop ; Animate the small stars falling from the Gamefreak logo. xor a ld [wMoveDownSmallStarsOAMCount], a ld hl, SmallStarsWaveCoordsPointerTable ld c, 6 .smallStarsLoop ld a, [hli] ld e, a ld a, [hli] ld d, a push bc push hl ld hl, wOAMBuffer + $50 ld c, 4 .smallStarsInnerLoop ; introduce new wave of 4 small stars OAM entries ld a, [de] cp -1 jr z, .next2 ld [hli], a ; Y inc de ld a, [de] ld [hli], a ; X inc de inc hl inc hl dec c jr nz, .smallStarsInnerLoop ld a, [wMoveDownSmallStarsOAMCount] cp 24 jr z, .next2 add 6 ; should be 4, but the extra 2 aren't visible on screen ld [wMoveDownSmallStarsOAMCount], a .next2 call MoveDownSmallStars push af ; shift the existing OAM entries down to make room for the next wave ld hl, wOAMBuffer + $10 ld de, wOAMBuffer ld bc, $50 call CopyData pop af pop hl pop bc ret c dec c jr nz, .smallStarsLoop and a ret SmallStarsOAM: dbsprite 0, 0, 0, 0, $A2, OAM_BEHIND_BG | OAM_OBP1 SmallStarsOAMEnd: SmallStarsWaveCoordsPointerTable: dw SmallStarsWave1Coords dw SmallStarsWave2Coords dw SmallStarsWave3Coords dw SmallStarsWave4Coords dw SmallStarsEmptyWave dw SmallStarsEmptyWave ; The stars that fall from the Gamefreak logo come in 4 waves of 4 OAM entries. ; These arrays contain the Y and X coordinates of each OAM entry. SmallStarsWave1Coords: db $68, $30 db $68, $40 db $68, $58 db $68, $78 SmallStarsWave2Coords: db $68, $38 db $68, $48 db $68, $60 db $68, $70 SmallStarsWave3Coords: db $68, $34 db $68, $4C db $68, $54 db $68, $64 SmallStarsWave4Coords: db $68, $3C db $68, $5C db $68, $6C db $68, $74 SmallStarsEmptyWave: db -1 ; end MoveDownSmallStars: ld b, 8 .loop ld hl, wOAMBuffer + $5c ld a, [wMoveDownSmallStarsOAMCount] ld de, -4 ld c, a .innerLoop inc [hl] ; Y add hl, de dec c jr nz, .innerLoop ; Toggle the palette so that the lower star in the small stars tile blinks in ; and out. ldh a, [rOBP1] xor %10100000 ldh [rOBP1], a ld c, 3 call CheckForUserInterruption ret c dec b jr nz, .loop ret GameFreakLogoOAMData: dbsprite 10, 9, 0, 0, $8d, 0 dbsprite 11, 9, 0, 0, $8e, 0 dbsprite 10, 10, 0, 0, $8f, 0 dbsprite 11, 10, 0, 0, $90, 0 dbsprite 10, 11, 0, 0, $91, 0 dbsprite 11, 11, 0, 0, $92, 0 dbsprite 6, 12, 0, 0, $80, 0 dbsprite 7, 12, 0, 0, $81, 0 dbsprite 8, 12, 0, 0, $82, 0 dbsprite 9, 12, 0, 0, $83, 0 dbsprite 10, 12, 0, 0, $93, 0 dbsprite 11, 12, 0, 0, $84, 0 dbsprite 12, 12, 0, 0, $85, 0 dbsprite 13, 12, 0, 0, $83, 0 dbsprite 14, 12, 0, 0, $81, 0 dbsprite 15, 12, 0, 0, $86, 0 GameFreakLogoOAMDataEnd: GameFreakShootingStarOAMData: dbsprite 20, 0, 0, 0, $a0, OAM_OBP1 dbsprite 21, 0, 0, 0, $a0, OAM_OBP1 | OAM_HFLIP dbsprite 20, 1, 0, 0, $a1, OAM_OBP1 dbsprite 21, 1, 0, 0, $a1, OAM_OBP1 | OAM_HFLIP GameFreakShootingStarOAMDataEnd: FallingStar: INCBIN "gfx/splash/falling_star.2bpp" FallingStarEnd: