Organize the engine/ directory

This is an informed attempt at reorganizing the engine/ directory by
creating categorized subdirectories, in order to make it easier to
navigate and find things.

The directories created are as follows:
* engine/game: Contains all "minigames", things like the unown puzzle
and slot machine.
* engine/gfx: Contains all handling of graphics. From loading palettes
to playing animations.
* engine/link: Contains all multiplayer functionality.
* engine/menu: Contains all generic/misc. menus and menu code.
Other, more specialized menus are in their own subdirectories (pokedex,
pokegear, party menu, etc).
* engine/overworld: Contains all handling of the overworld. From loading
and connecting maps to wild encounters and the scripting engine.
* engine/pokegear: In the same vein as engine/pokedex, except it could
use some more splitting up.
* engine/pokemon: Contains everything related to manipulating pokemon
data. From the pokemon storage system to evolution and mail.
* engine/printer: Contains everything related to printing things as well
as the printer communication.
* engine/title: Contains intro sequences, title screens and credits.

1 files changed, 368 insertions, 0 deletions

diff --git a/engine/gfx/evolution_animation.asm b/engine/gfx/evolution_animation.asm
new file mode 100755
index 000000000..978f9e968
--- /dev/null
+++ b/engine/gfx/evolution_animation.asm
@@ -0,0 +1,368 @@
+EvolutionAnimation: ; 4e5e1
+	push hl
+	push de
+	push bc
+	ld a, [wCurSpecies]
+	push af
+	ld a, [rOBP0]
+	push af
+	ld a, [wBaseDexNo]
+	push af
+
+	call .EvolutionAnimation
+
+	pop af
+	ld [wBaseDexNo], a
+	pop af
+	ld [rOBP0], a
+	pop af
+	ld [wCurSpecies], a
+	pop bc
+	pop de
+	pop hl
+
+	ld a, [wEvolutionCanceled]
+	and a
+	ret z
+
+	scf
+	ret
+; 4e607
+
+.EvolutionAnimation: ; 4e607
+	ld a, %11100100
+	ld [rOBP0], a
+
+	ld de, MUSIC_NONE
+	call PlayMusic
+
+	farcall ClearSpriteAnims
+
+	ld de, .GFX
+	ld hl, vTiles0
+	lb bc, BANK(.GFX), 8
+	call Request2bpp
+
+	xor a
+	ld [wLowHealthAlarm], a
+	call WaitBGMap
+	xor a
+	ld [hBGMapMode], a
+	ld a, [wEvolutionOldSpecies]
+	ld [wPlayerHPPal], a
+
+	ld c, $0
+	call .GetSGBLayout
+	ld a, [wEvolutionOldSpecies]
+	ld [wCurPartySpecies], a
+	ld [wCurSpecies], a
+	call .PlaceFrontpic
+
+	ld de, vTiles2
+	ld hl, vTiles2 tile $31
+	ld bc, 7 * 7
+	call Request2bpp
+
+	ld a, 7 * 7
+	ld [wEvolutionPicOffset], a
+	call .ReplaceFrontpic
+	ld a, [wEvolutionNewSpecies]
+	ld [wCurPartySpecies], a
+	ld [wCurSpecies], a
+	call .LoadFrontpic
+	ld a, [wEvolutionOldSpecies]
+	ld [wCurPartySpecies], a
+	ld [wCurSpecies], a
+
+	ld a, $1
+	ld [hBGMapMode], a
+	call .check_statused
+	jr c, .skip_cry
+
+	ld a, [wEvolutionOldSpecies]
+	call PlayMonCry
+
+.skip_cry
+	ld de, MUSIC_EVOLUTION
+	call PlayMusic
+
+	ld c, 80
+	call DelayFrames
+
+	ld c, $1
+	call .GetSGBLayout
+	call .AnimationSequence
+	jr c, .cancel_evo
+
+	ld a, -7 * 7
+	ld [wEvolutionPicOffset], a
+	call .ReplaceFrontpic
+	xor a
+	ld [wEvolutionCanceled], a
+
+	ld a, [wEvolutionNewSpecies]
+	ld [wPlayerHPPal], a
+
+	ld c, $0
+	call .GetSGBLayout
+	call .PlayEvolvedSFX
+	farcall ClearSpriteAnims
+	call .check_statused
+	jr c, .no_anim
+
+	ld a, [wBoxAlignment]
+	push af
+	ld a, $1
+	ld [wBoxAlignment], a
+	ld a, [wCurPartySpecies]
+	push af
+
+	ld a, [wPlayerHPPal]
+	ld [wCurPartySpecies], a
+	hlcoord 7, 2
+	ld d, $0
+	ld e, ANIM_MON_EVOLVE
+	predef AnimateFrontpic
+
+	pop af
+	ld [wCurPartySpecies], a
+	pop af
+	ld [wBoxAlignment], a
+	ret
+
+.no_anim
+	ret
+
+.cancel_evo
+	ld a, $1
+	ld [wEvolutionCanceled], a
+
+	ld a, [wEvolutionOldSpecies]
+	ld [wPlayerHPPal], a
+
+	ld c, $0
+	call .GetSGBLayout
+	call .PlayEvolvedSFX
+	farcall ClearSpriteAnims
+	call .check_statused
+	ret c
+
+	ld a, [wPlayerHPPal]
+	call PlayMonCry
+	ret
+; 4e703
+
+.GetSGBLayout: ; 4e703
+	ld b, SCGB_EVOLUTION
+	jp GetSGBLayout
+; 4e708
+
+.PlaceFrontpic: ; 4e708
+	call GetBaseData
+	hlcoord 7, 2
+	jp PrepMonFrontpic
+; 4e711
+
+.LoadFrontpic: ; 4e711
+	call GetBaseData
+	ld a, $1
+	ld [wBoxAlignment], a
+	ld de, vTiles2
+	predef GetAnimatedFrontpic
+	xor a
+	ld [wBoxAlignment], a
+	ret
+; 4e726
+
+.AnimationSequence: ; 4e726
+	call ClearJoypad
+	lb bc, 1, 2 * 7 ; flash b times, wait c frames in between
+.loop
+	push bc
+	call .WaitFrames_CheckPressedB
+	pop bc
+	jr c, .exit_sequence
+	push bc
+	call .Flash
+	pop bc
+	inc b
+	dec c
+	dec c
+	jr nz, .loop
+	and a
+	ret
+
+.exit_sequence
+	scf
+	ret
+; 4e741
+
+.Flash: ; 4e741
+	ld a, -7 * 7 ; new stage
+	ld [wEvolutionPicOffset], a
+	call .ReplaceFrontpic
+	ld a, 7 * 7 ; previous stage
+	ld [wEvolutionPicOffset], a
+	call .ReplaceFrontpic
+	dec b
+	jr nz, .Flash
+	ret
+; 4e755
+
+.ReplaceFrontpic: ; 4e755
+	push bc
+	xor a
+	ld [hBGMapMode], a
+	hlcoord 7, 2
+	lb bc, 7, 7
+	ld de, SCREEN_WIDTH - 7
+.loop1
+	push bc
+.loop2
+	ld a, [wEvolutionPicOffset]
+	add [hl]
+	ld [hli], a
+	dec c
+	jr nz, .loop2
+	pop bc
+	add hl, de
+	dec b
+	jr nz, .loop1
+	ld a, $1
+	ld [hBGMapMode], a
+	call WaitBGMap
+	pop bc
+	ret
+; 4e779
+
+.WaitFrames_CheckPressedB: ; 4e779
+	call DelayFrame
+	push bc
+	call JoyTextDelay
+	ld a, [hJoyDown]
+	pop bc
+	and B_BUTTON
+	jr nz, .pressed_b
+.loop3
+	dec c
+	jr nz, .WaitFrames_CheckPressedB
+	and a
+	ret
+
+.pressed_b
+	ld a, [wForceEvolution]
+	and a
+	jr nz, .loop3
+	scf
+	ret
+; 4e794
+
+.check_statused ; 4e794
+	ld a, [wCurPartyMon]
+	ld hl, wPartyMon1Species
+	call GetPartyLocation
+	ld b, h
+	ld c, l
+	farcall CheckFaintedFrzSlp
+	ret
+; 4e7a6
+
+.PlayEvolvedSFX: ; 4e7a6
+	ld a, [wEvolutionCanceled]
+	and a
+	ret nz
+	ld de, SFX_EVOLVED
+	call PlaySFX
+	ld hl, wJumptableIndex
+	ld a, [hl]
+	push af
+	ld [hl], $0
+.loop4
+	call .balls_of_light
+	jr nc, .done
+	call .AnimateBallsOfLight
+	jr .loop4
+
+.done
+	ld c, 32
+.loop5
+	call .AnimateBallsOfLight
+	dec c
+	jr nz, .loop5
+	pop af
+	ld [wJumptableIndex], a
+	ret
+; 4e7cf
+
+.balls_of_light ; 4e7cf
+	ld hl, wJumptableIndex
+	ld a, [hl]
+	cp 32
+	ret nc
+	ld d, a
+	inc [hl]
+	and $1
+	jr nz, .done_balls
+	ld e, $0
+	call .GenerateBallOfLight
+	ld e, $10
+	call .GenerateBallOfLight
+
+.done_balls
+	scf
+	ret
+; 4e7e8
+
+.GenerateBallOfLight: ; 4e7e8
+	push de
+	depixel 9, 11
+	ld a, SPRITE_ANIM_INDEX_EVOLUTION_BALL_OF_LIGHT
+	call _InitSpriteAnimStruct
+	ld hl, SPRITEANIMSTRUCT_JUMPTABLE_INDEX
+	add hl, bc
+	ld a, [wJumptableIndex]
+	and %1110
+	sla a
+	pop de
+	add e
+	ld [hl], a
+	ld hl, SPRITEANIMSTRUCT_TILE_ID
+	add hl, bc
+	ld [hl], $0
+	ld hl, SPRITEANIMSTRUCT_0C
+	add hl, bc
+	ld [hl], $10
+	ret
+; 4e80c
+
+.AnimateBallsOfLight: ; 4e80c
+	push bc
+	callfar PlaySpriteAnimations
+	; a = (([hVBlankCounter] + 4) / 2) % NUM_PALETTES
+	ld a, [hVBlankCounter]
+	and %1110
+	srl a
+	inc a
+	inc a
+	and $7
+	ld b, a
+	ld hl, wVirtualOAMSprite00Attributes
+	ld c, NUM_SPRITE_OAM_STRUCTS
+.loop6
+	ld a, [hl]
+	or b
+	ld [hli], a ; attributes
+rept SPRITEOAMSTRUCT_LENGTH + -1
+	inc hl
+endr
+	dec c
+	jr nz, .loop6
+	pop bc
+	call DelayFrame
+	ret
+; 4e831
+
+
+.GFX:
+INCBIN "gfx/evo/bubble_large.2bpp"
+INCBIN "gfx/evo/bubble.2bpp"