ref: aa3da5f3b07b8965bf7d4f1b5449ce67bed4fb87
dir: /engine/trade.asm/
InternalClockTradeAnim: ; 410e2 (10:50e2) ; Do the trading animation with the player's gameboy on the left. ; In-game trades and internally clocked link cable trades use this. ld a, [wTradedPlayerMonSpecies] ld [wLeftGBMonSpecies], a ld a, [wTradedEnemyMonSpecies] ld [wRightGBMonSpecies], a ld de, InternalClockTradeFuncSequence jr TradeAnimCommon ExternalClockTradeAnim: ; 410f3 (10:50f3) ; Do the trading animation with the player's gameboy on the right. ; Externally clocked link cable trades use this. ld a, [wTradedEnemyMonSpecies] ld [wLeftGBMonSpecies], a ld a, [wTradedPlayerMonSpecies] ld [wRightGBMonSpecies], a ld de, ExternalClockTradeFuncSequence TradeAnimCommon: ; 41102 (10:5102) ld a, [W_OPTIONS] push af ld a, [hSCY] push af ld a, [hSCX] push af xor a ld [W_OPTIONS], a ld [hSCY], a ld [hSCX], a push de .loop pop de ld a, [de] cp $ff jr z, .done inc de push de ld hl, TradeFuncPointerTable add a ld c, a ld b, $0 add hl, bc ld a, [hli] ld h, [hl] ld l, a ld de, .loop push de jp [hl] ; call trade func, which will return to the top of the loop .done pop af ld [hSCX], a pop af ld [hSCY], a pop af ld [W_OPTIONS], a ret addtradefunc: MACRO \1TradeFunc:: dw \1 ENDM tradefunc: MACRO db (\1TradeFunc - TradeFuncPointerTable) / 2 ENDM ; The functions in the sequences below are executed in order by TradeFuncCommon. ; They are from opposite perspectives. The external clock one makes use of ; Trade_SwapNames to swap the player and enemy names for some functions. InternalClockTradeFuncSequence: ; 41138 (10:5138) tradefunc LoadTradingGFXAndMonNames tradefunc Trade_ShowPlayerMon tradefunc Trade_DrawOpenEndOfLinkCable tradefunc Trade_AnimateBallEnteringLinkCable tradefunc Trade_AnimLeftToRight tradefunc Trade_Delay100 tradefunc Trade_ShowClearedWindow tradefunc PrintTradeWentToText tradefunc PrintTradeForSendsText tradefunc PrintTradeFarewellText tradefunc Trade_AnimRightToLeft tradefunc Trade_ShowClearedWindow tradefunc Trade_DrawOpenEndOfLinkCable tradefunc Trade_ShowEnemyMon tradefunc Trade_Delay100 tradefunc Trade_Cleanup db $FF ExternalClockTradeFuncSequence: ; 41149 (10:5149) tradefunc LoadTradingGFXAndMonNames tradefunc Trade_ShowClearedWindow tradefunc PrintTradeWillTradeText tradefunc PrintTradeFarewellText tradefunc Trade_SwapNames tradefunc Trade_AnimLeftToRight tradefunc Trade_SwapNames tradefunc Trade_ShowClearedWindow tradefunc Trade_DrawOpenEndOfLinkCable tradefunc Trade_ShowEnemyMon tradefunc Trade_SlideTextBoxOffScreen tradefunc Trade_ShowPlayerMon tradefunc Trade_DrawOpenEndOfLinkCable tradefunc Trade_AnimateBallEnteringLinkCable tradefunc Trade_SwapNames tradefunc Trade_AnimRightToLeft tradefunc Trade_SwapNames tradefunc Trade_Delay100 tradefunc Trade_ShowClearedWindow tradefunc PrintTradeWentToText tradefunc Trade_Cleanup db $FF TradeFuncPointerTable: ; 4115f (10:515f) addtradefunc LoadTradingGFXAndMonNames addtradefunc Trade_ShowPlayerMon addtradefunc Trade_DrawOpenEndOfLinkCable addtradefunc Trade_AnimateBallEnteringLinkCable addtradefunc Trade_ShowEnemyMon addtradefunc Trade_AnimLeftToRight addtradefunc Trade_AnimRightToLeft addtradefunc Trade_Delay100 addtradefunc Trade_ShowClearedWindow addtradefunc PrintTradeWentToText addtradefunc PrintTradeForSendsText addtradefunc PrintTradeFarewellText addtradefunc PrintTradeTakeCareText addtradefunc PrintTradeWillTradeText addtradefunc Trade_Cleanup addtradefunc Trade_SlideTextBoxOffScreen addtradefunc Trade_SwapNames Trade_Delay100: ; 41181 (10:5181) ld c, 100 jp DelayFrames Trade_CopyTileMapToVRAM: ; 41186 (10:5186) ld a, $1 ld [H_AUTOBGTRANSFERENABLED], a call Delay3 xor a ld [H_AUTOBGTRANSFERENABLED], a ret Trade_Delay80: ; 41191 (10:5191) ld c, 80 jp DelayFrames Trade_ClearTileMap: ; 41196 (10:5196) hlCoord 0, 0 ld bc, 20 * 18 ld a, " " jp FillMemory LoadTradingGFXAndMonNames: ; 411a1 (10:51a1) call Trade_ClearTileMap call DisableLCD ld hl, TradingAnimationGraphics ld de, vChars2 + $310 ld bc, $310 ld a, BANK(TradingAnimationGraphics) call FarCopyData2 ld hl, TradingAnimationGraphics2 ld de, vSprites + $7c0 ld bc, $40 ld a, BANK(TradingAnimationGraphics2) call FarCopyData2 ld hl, vBGMap0 ld bc, $800 ld a, " " call FillMemory call ClearSprites ld a, $ff ld [wUpdateSpritesEnabled], a ld hl, wd730 set 6, [hl] ; turn on instant text printing ld a, [wOnSGB] and a ld a, $e4 ; non-SGB OBP0 jr z, .next ld a, $f0 ; SGB OBP0 .next ld [rOBP0], a call EnableLCD xor a ld [H_AUTOBGTRANSFERENABLED], a ld a, [wTradedPlayerMonSpecies] ld [wd11e], a call GetMonName ld hl, wcd6d ld de, wcf4b ld bc, $b call CopyData ld a, [wTradedEnemyMonSpecies] ld [wd11e], a jp GetMonName Trade_LoadMonPartySpriteGfx: ; 4120b (10:520b) ld a, %11010000 ld [rOBP1], a ld b, BANK(LoadMonPartySpriteGfx) ld hl, LoadMonPartySpriteGfx jp Bankswitch Trade_SwapNames: ; 41217 (10:5217) ld hl, wPlayerName ld de, wBuffer ld bc, 11 call CopyData ld hl, wLinkEnemyTrainerName ld de, wPlayerName ld bc, 11 call CopyData ld hl, wBuffer ld de, wLinkEnemyTrainerName ld bc, 11 jp CopyData Trade_Cleanup: ; 4123b (10:523b) xor a call LoadGBPal ld hl, wd730 res 6, [hl] ; turn off instant text printing ret Trade_ShowPlayerMon: ; 41245 (10:5245) ld a, %10101011 ld [rLCDC], a ld a, $50 ld [hWY], a ld a, $86 ld [rWX], a ld [hSCX], a xor a ld [H_AUTOBGTRANSFERENABLED], a hlCoord 4, 0 ld b, 6 ld c, 10 call TextBoxBorder call Trade_PrintPlayerMonInfoText ld b, vBGMap0 / $100 call CopyScreenTileBufferToVRAM call ClearScreen ld a, [wTradedPlayerMonSpecies] call Trade_LoadMonSprite ld a, $7e .slideScreenLoop push af call DelayFrame pop af ld [rWX], a ld [hSCX], a dec a dec a and a jr nz, .slideScreenLoop call Trade_Delay80 ld a, TRADE_BALL_POOF_ANIM call Trade_ShowAnimation ld a, TRADE_BALL_DROP_ANIM call Trade_ShowAnimation ; clears mon pic ld a, [wTradedPlayerMonSpecies] call PlayCry xor a ld [H_AUTOBGTRANSFERENABLED], a ret Trade_DrawOpenEndOfLinkCable: ; 41298 (10:5298) call Trade_ClearTileMap ld b, vBGMap0 / $100 call CopyScreenTileBufferToVRAM ld b, $8 call GoPAL_SET ; This function call is pointless. It just copies blank tiles to VRAM that was ; already filled with blank tiles. ld hl, vBGMap1 + $8c call Trade_CopyCableTilesOffScreen ld a, $a0 ld [hSCX], a call DelayFrame ld a, %10001011 ld [rLCDC], a hlCoord 6, 2 ld b, $7 ; open end of link cable tile ID list index call CopyTileIDsFromList_ZeroBaseTileID call Trade_CopyTileMapToVRAM ld a, (SFX_02_3d - SFX_Headers_02) / 3 call PlaySound ld c, 20 .loop ld a, [hSCX] add 4 ld [hSCX], a dec c jr nz, .loop ret Trade_AnimateBallEnteringLinkCable: ; 412d2 (10:52d2) ld a, TRADE_BALL_SHAKE_ANIM call Trade_ShowAnimation ld c, 10 call DelayFrames ld a, %11100100 ld [rOBP0], a xor a ld [wd09f], a ld bc, $2060 .moveBallInsideLinkCableLoop push bc xor a ld de, Trade_BallInsideLinkCableOAM call WriteOAMBlock ld a, [wd09f] xor $1 ld [wd09f], a add $7e ld hl, wOAMBuffer + $02 ld de, $4 ld c, e .cycleSpriteFramesLoop ld [hl], a add hl, de dec c jr nz, .cycleSpriteFramesLoop call Delay3 pop bc ld a, c add $4 ld c, a cp $a0 jr nc, .ballSpriteReachedEdgeOfScreen ld a, (SFX_02_3c - SFX_Headers_02) / 3 call PlaySound jr .moveBallInsideLinkCableLoop .ballSpriteReachedEdgeOfScreen call ClearSprites ld a, $1 ld [H_AUTOBGTRANSFERENABLED], a call ClearScreen ld b, $98 call CopyScreenTileBufferToVRAM call Delay3 xor a ld [H_AUTOBGTRANSFERENABLED], a ret Trade_BallInsideLinkCableOAM: ; 4132e (10:532e) db $7E,$00,$7E,$20 db $7E,$40,$7E,$60 Trade_ShowEnemyMon: ; 41336 (10:5336) ld a, TRADE_BALL_TILT_ANIM call Trade_ShowAnimation call Trade_ShowClearedWindow hlCoord 4, 10 ld b, 6 ld c, 10 call TextBoxBorder call Trade_PrintEnemyMonInfoText call Trade_CopyTileMapToVRAM ld a, $1 ld [H_AUTOBGTRANSFERENABLED], a ld a, [wTradedEnemyMonSpecies] call Trade_LoadMonSprite ld a, TRADE_BALL_POOF_ANIM call Trade_ShowAnimation ld a, $1 ld [H_AUTOBGTRANSFERENABLED], a ld a, [wTradedEnemyMonSpecies] call PlayCry call Trade_Delay100 hlCoord 4, 10 ld bc, $80c call ClearScreenArea jp PrintTradeTakeCareText Trade_AnimLeftToRight: ; 41376 (10:5376) ; Animates the mon moving from the left GB to the right one. call Trade_InitGameboyTransferGfx ld a, $1 ld [wTradedMonMovingRight], a ld a, $e4 ld [rOBP0], a ld a, $54 ld [W_BASECOORDX], a ld a, $1c ld [W_BASECOORDY], a ld a, [wLeftGBMonSpecies] ld [wMonPartySpriteSpecies], a call Trade_WriteCircledMonOAM call Trade_DrawLeftGameboy call Trade_CopyTileMapToVRAM call Trade_DrawCableAcrossScreen ld hl, vBGMap1 + $8c call Trade_CopyCableTilesOffScreen ld b, $6 call Trade_AnimMonMoveHorizontal ld a, $1 ld [H_AUTOBGTRANSFERENABLED], a call Trade_DrawCableAcrossScreen ld b, $4 call Trade_AnimMonMoveHorizontal call Trade_DrawRightGameboy ld b, $6 call Trade_AnimMonMoveHorizontal xor a ld [H_AUTOBGTRANSFERENABLED], a call Trade_AnimMonMoveVertical jp ClearSprites Trade_AnimRightToLeft: ; 413c6 (10:53c6) ; Animates the mon moving from the right GB to the left one. call Trade_InitGameboyTransferGfx xor a ld [wTradedMonMovingRight], a ld a, $64 ld [W_BASECOORDX], a ld a, $44 ld [W_BASECOORDY], a ld a, [wRightGBMonSpecies] ld [wMonPartySpriteSpecies], a call Trade_WriteCircledMonOAM call Trade_DrawRightGameboy call Trade_CopyTileMapToVRAM call Trade_DrawCableAcrossScreen ld hl, vBGMap1 + $94 call Trade_CopyCableTilesOffScreen call Trade_AnimMonMoveVertical ld b, $6 call Trade_AnimMonMoveHorizontal ld a, $1 ld [H_AUTOBGTRANSFERENABLED], a call Trade_DrawCableAcrossScreen ld b, $4 call Trade_AnimMonMoveHorizontal call Trade_DrawLeftGameboy ld b, $6 call Trade_AnimMonMoveHorizontal xor a ld [H_AUTOBGTRANSFERENABLED], a jp ClearSprites Trade_InitGameboyTransferGfx: ; 41411 (10:5411) ; Initialises the graphics for showing a mon moving between gameboys. ld a, $1 ld [H_AUTOBGTRANSFERENABLED], a call ClearScreen xor a ld [H_AUTOBGTRANSFERENABLED], a call Trade_LoadMonPartySpriteGfx call DelayFrame ld a, %10101011 ld [rLCDC], a xor a ld [hSCX], a ld a, $90 ld [hWY], a ret Trade_DrawLeftGameboy: ; 4142d (10:542d) call Trade_ClearTileMap ; draw link cable hlCoord 11, 4 ld a, $5d ld [hli], a ld a, $5e ld c, $8 .loop ld [hli], a dec c jr nz, .loop ; draw gameboy pic hlCoord 5, 3 ld b, $6 call CopyTileIDsFromList_ZeroBaseTileID ; draw text box with player name below gameboy pic hlCoord 4, 12 ld b, 2 ld c, 7 call TextBoxBorder hlCoord 5, 14 ld de, wPlayerName call PlaceString jp DelayFrame Trade_DrawRightGameboy: ; 4145c (10:545c) call Trade_ClearTileMap ; draw horizontal segment of link cable hlCoord 0, 4 ld a, $5e ld c, $e .loop ld [hli], a dec c jr nz, .loop ; draw vertical segment of link cable ld a, $5f ld [hl], a ld de, SCREEN_WIDTH add hl, de ld a, $61 ld [hl], a add hl, de ld [hl], a add hl, de ld [hl], a add hl, de ld [hl], a add hl, de ld a, $60 ld [hld], a ld a, $5d ld [hl], a ; draw gameboy pic hlCoord 7, 8 ld b, $6 call CopyTileIDsFromList_ZeroBaseTileID ; draw text box with enemy name above link cable hlCoord 6, 0 ld b, $2 ld c, $7 call TextBoxBorder hlCoord 7, 2 ld de, wLinkEnemyTrainerName call PlaceString jp DelayFrame Trade_DrawCableAcrossScreen: ; 4149f (10:549f) ; Draws the link cable across the screen. call Trade_ClearTileMap hlCoord 0, 4 ld a, $5e ld c, SCREEN_WIDTH .loop ld [hli], a dec c jr nz, .loop ret Trade_CopyCableTilesOffScreen: ; 414ae (10:54ae) ; This is used to copy the link cable tiles off screen so that the cable ; continues when the screen is scrolled. push hl hlCoord 0, 4 call CopyToScreenEdgeTiles pop hl ld a, h ld [H_SCREENEDGEREDRAWADDR + 1], a ld a, l ld [H_SCREENEDGEREDRAWADDR], a ld a, REDRAWROW ld [H_SCREENEDGEREDRAW], a ld c, 10 jp DelayFrames Trade_AnimMonMoveHorizontal: ; 414c5 (10:54c5) ; Animates the mon going through the link cable horizontally over a distance of ; b 16-pixel units. ld a, [wTradedMonMovingRight] ld e, a ld d, $8 .scrollLoop ld a, e dec a jr z, .movingRight ; moving left ld a, [hSCX] sub $2 jr .next .movingRight ld a, [hSCX] add $2 .next ld [hSCX], a call DelayFrame dec d jr nz, .scrollLoop call Trade_AnimCircledMon dec b jr nz, Trade_AnimMonMoveHorizontal ret Trade_AnimCircledMon: ; 414e8 (10:54e8) ; Cycles between the two animation frames of the mon party sprite, cycles ; between a circle and an oval around the mon sprite, and makes the cable flash. push de push bc push hl ld a, [rBGP] xor $3c ; make link cable flash ld [rBGP], a ld hl, wOAMBuffer + $02 ld de, $4 ld c, $14 .loop ld a, [hl] xor $40 ld [hl], a add hl, de dec c jr nz, .loop pop hl pop bc pop de ret Trade_WriteCircledMonOAM: ; 41505 (10:5505) callba WriteMonPartySpriteOAMBySpecies call Trade_WriteCircleOAM Trade_AddOffsetsToOAMCoords: ; 41510 (10:5510) ld hl, wOAMBuffer ld c, $14 .loop ld a, [W_BASECOORDY] add [hl] ld [hli], a ld a, [W_BASECOORDX] add [hl] ld [hli], a inc hl inc hl dec c jr nz, .loop ret Trade_AnimMonMoveVertical: ; 41525 (10:5525) ; Animates the mon going through the link cable vertically as well as ; horizontally for a bit. The last bit of horizontal movement (when moving ; right) or the first bit of horizontal movement (when moving left) are done ; here instead of Trade_AnimMonMoveHorizontal because this function moves the ; sprite itself rather than scrolling the screen around the sprite. Moving the ; sprite itself is necessary because the vertical segment of the link cable is ; to the right of the screen position that the mon sprite has when ; Trade_AnimMonMoveHorizontal is executing. ld a, [wTradedMonMovingRight] and a jr z, .movingLeft ; moving right ld bc, $400 ; move right call .doAnim ld bc, $a ; move down jr .doAnim .movingLeft ld bc, $f6 ; move up call .doAnim ld bc, $fc00 ; move left .doAnim ld a, b ld [W_BASECOORDX], a ld a, c ld [W_BASECOORDY], a ld d, $4 .loop call Trade_AddOffsetsToOAMCoords call Trade_AnimCircledMon ld c, 8 call DelayFrames dec d jr nz, .loop ret Trade_WriteCircleOAM: ; 41558 (10:5558) ; Writes the OAM blocks for the circle around the traded mon as it passes ; the link cable. ld hl, Trade_CircleOAMPointers ld c, $4 xor a .loop push bc ld e, [hl] inc hl ld d, [hl] inc hl ld c, [hl] inc hl ld b, [hl] inc hl push hl inc a push af call WriteOAMBlock pop af pop hl pop bc dec c jr nz, .loop ret Trade_CircleOAMPointers: ; 41574 (10:5574) dw Trade_CircleOAM0 db $08,$08 dw Trade_CircleOAM1 db $18,$08 dw Trade_CircleOAM2 db $08,$18 dw Trade_CircleOAM3 db $18,$18 Trade_CircleOAM0: ; 41584 (10:5584) db $38,$10,$39,$10 db $3A,$10,$3B,$10 Trade_CircleOAM1: ; 4158c (10:558c) db $39,$30,$38,$30 db $3B,$30,$3A,$30 Trade_CircleOAM2: ; 41594 (10:5594) db $3A,$50,$3B,$50 db $38,$50,$39,$50 Trade_CircleOAM3: ; 4159c (10:559c) db $3B,$70,$3A,$70 db $39,$70,$38,$70 ; a = species Trade_LoadMonSprite: ; 415a4 (10:55a4) ld [wcf91], a ld [wd0b5], a ld [wcf1d], a ld b, $b ld c, $0 call GoPAL_SET ld a, [H_AUTOBGTRANSFERENABLED] xor $1 ld [H_AUTOBGTRANSFERENABLED], a call GetMonHeader hlCoord 7, 2 call LoadFlippedFrontSpriteByMonIndex ld c, 10 jp DelayFrames Trade_ShowClearedWindow: ; 415c8 (10:55c8) ; clears the window and covers the BG entirely with the window ld a, $1 ld [H_AUTOBGTRANSFERENABLED], a call ClearScreen ld a, %11100011 ld [rLCDC], a ld a, $7 ld [rWX], a xor a ld [hWY], a ld a, $90 ld [hSCX], a ret Trade_SlideTextBoxOffScreen: ; 415df (10:55df) ; Slides the window right until it's off screen. The window usually just has ; a text box at the bottom when this is called. However, when this is called ; after Trade_ShowEnemyMon in the external clock sequence, there is a mon pic ; above the text box and it is also scrolled off the screen. ld c, 50 call DelayFrames .loop call DelayFrame ld a, [rWX] inc a inc a ld [rWX], a cp $a1 jr nz, .loop call Trade_ClearTileMap ld c, 10 call DelayFrames ld a, $7 ld [rWX], a ret PrintTradeWentToText: ; 415fe (10:55fe) ld hl, TradeWentToText call PrintText ld c, 200 call DelayFrames jp Trade_SlideTextBoxOffScreen TradeWentToText: ; 4160c (10:560c) TX_FAR _TradeWentToText db "@" PrintTradeForSendsText: ; 41611 (10:5611) ld hl, TradeForText call PrintText call Trade_Delay80 ld hl, TradeSendsText call PrintText jp Trade_Delay80 TradeForText: ; 41623 (10:5623) TX_FAR _TradeForText db "@" TradeSendsText: ; 41628 (10:5628) TX_FAR _TradeSendsText db "@" PrintTradeFarewellText: ; 4162d (10:562d) ld hl, TradeWavesFarewellText call PrintText call Trade_Delay80 ld hl, TradeTransferredText call PrintText call Trade_Delay80 jp Trade_SlideTextBoxOffScreen TradeWavesFarewellText: ; 41642 (10:5642) TX_FAR _TradeWavesFarewellText db "@" TradeTransferredText: ; 41647 (10:5647) TX_FAR _TradeTransferredText db "@" PrintTradeTakeCareText: ; 4164c (10:564c) ld hl, TradeTakeCareText call PrintText jp Trade_Delay80 TradeTakeCareText: ; 41655 (10:5655) TX_FAR _TradeTakeCareText db "@" PrintTradeWillTradeText: ; 4165a (10:565a) ld hl, TradeWillTradeText call PrintText call Trade_Delay80 ld hl, TradeforText call PrintText jp Trade_Delay80 TradeWillTradeText: ; 4166c (10:566c) TX_FAR _TradeWillTradeText db "@" TradeforText: ; 41671 (10:5671) TX_FAR _TradeforText db "@" Trade_ShowAnimation: ; 41676 (10:5676) ld [W_ANIMATIONID], a xor a ld [wcc5b], a predef_jump MoveAnimation