ref: 18b3aa621feb498f9477b82a46611d2992732c3c
dir: /engine/overworld/cut.asm/
UsedCut: xor a ld [wActionResultOrTookBattleTurn], a ; initialise to failure value ld a, [wCurMapTileset] and a ; OVERWORLD jr z, .overworld cp GYM jr nz, .nothingToCut ld a, [wTileInFrontOfPlayer] cp $50 ; gym cut tree jr nz, .nothingToCut jr .canCut .overworld dec a ld a, [wTileInFrontOfPlayer] cp $3d ; cut tree jr z, .canCut cp $52 ; grass jr z, .canCut .nothingToCut ld hl, .NothingToCutText jp PrintText .NothingToCutText TX_FAR _NothingToCutText db "@" .canCut ld [wCutTile], a ld a, 1 ld [wActionResultOrTookBattleTurn], a ; used cut ld a, [wWhichPokemon] ld hl, wPartyMonNicks call GetPartyMonName ld hl, wd730 set 6, [hl] call GBPalWhiteOutWithDelay3 call ClearSprites call RestoreScreenTilesAndReloadTilePatterns ld a, SCREEN_HEIGHT_PIXELS ld [hWY], a call Delay3 call LoadGBPal call LoadCurrentMapView call SaveScreenTilesToBuffer2 call Delay3 xor a ld [hWY], a ld hl, UsedCutText call PrintText call LoadScreenTilesFromBuffer2 ld hl, wd730 res 6, [hl] ld a, $ff ld [wUpdateSpritesEnabled], a call InitCutAnimOAM ld de, CutTreeBlockSwaps call ReplaceTreeTileBlock call RedrawMapView callba AnimCut ld a, $1 ld [wUpdateSpritesEnabled], a ld a, SFX_CUT call PlaySound ld a, $90 ld [hWY], a call UpdateSprites jp RedrawMapView UsedCutText: TX_FAR _UsedCutText db "@" InitCutAnimOAM: xor a ld [wWhichAnimationOffsets], a ld a, %11100100 ld [rOBP1], a ld a, [wCutTile] cp $52 jr z, .grass ; tree ld de, Overworld_GFX + $2d0 ; cuttable tree sprite top row ld hl, vChars1 + $7c0 lb bc, BANK(Overworld_GFX), $02 call CopyVideoData ld de, Overworld_GFX + $3d0 ; cuttable tree sprite bottom row ld hl, vChars1 + $7e0 lb bc, BANK(Overworld_GFX), $02 call CopyVideoData jr WriteCutOrBoulderDustAnimationOAMBlock .grass ld hl, vChars1 + $7c0 call LoadCutGrassAnimationTilePattern ld hl, vChars1 + $7d0 call LoadCutGrassAnimationTilePattern ld hl, vChars1 + $7e0 call LoadCutGrassAnimationTilePattern ld hl, vChars1 + $7f0 call LoadCutGrassAnimationTilePattern call WriteCutOrBoulderDustAnimationOAMBlock ld hl, wOAMBuffer + $93 ld de, 4 ld a, $30 ld c, e .loop ld [hl], a add hl, de xor $60 dec c jr nz, .loop ret LoadCutGrassAnimationTilePattern: ld de, AnimationTileset2 + $60 ; tile depicting a leaf lb bc, BANK(AnimationTileset2), $01 jp CopyVideoData WriteCutOrBoulderDustAnimationOAMBlock: call GetCutOrBoulderDustAnimationOffsets ld a, $9 ld de, CutOrBoulderDustAnimationTilesAndAttributes jp WriteOAMBlock CutOrBoulderDustAnimationTilesAndAttributes: db $FC,$10,$FD,$10 db $FE,$10,$FF,$10 GetCutOrBoulderDustAnimationOffsets: ld hl, wSpriteStateData1 + 4 ld a, [hli] ; player's sprite screen Y position ld b, a inc hl ld a, [hli] ; player's sprite screen X position ld c, a ; bc holds ypos/xpos of player's sprite inc hl inc hl ld a, [hl] ; a holds direction of player (00: down, 04: up, 08: left, 0C: right) srl a ld e, a ld d, $0 ; de holds direction (00: down, 02: up, 04: left, 06: right) ld a, [wWhichAnimationOffsets] and a ld hl, CutAnimationOffsets jr z, .next ld hl, BoulderDustAnimationOffsets .next add hl, de ld e, [hl] inc hl ld d, [hl] ld a, b add d ld b, a ld a, c add e ld c, a ret CutAnimationOffsets: ; Each pair represents the x and y pixels offsets from the player of where the cut tree animation should be drawn db 8, 36 ; player is facing down db 8, 4 ; player is facing up db -8, 20 ; player is facing left db 24, 20 ; player is facing right BoulderDustAnimationOffsets: ; Each pair represents the x and y pixels offsets from the player of where the cut tree animation should be drawn ; These offsets represent 2 blocks away from the player db 8, 52 ; player is facing down db 8, -12 ; player is facing up db -24, 20 ; player is facing left db 40, 20 ; player is facing right ReplaceTreeTileBlock: ; Determine the address of the tile block that contains the tile in front of the ; player (i.e. where the tree is) and replace it with the corresponding tile ; block that doesn't have the tree. push de ld a, [wCurMapWidth] add 6 ld c, a ld b, 0 ld d, 0 ld hl, wCurrentTileBlockMapViewPointer ld a, [hli] ld h, [hl] ld l, a add hl, bc ld a, [wSpriteStateData1 + 9] ; player sprite's facing direction and a jr z, .down cp SPRITE_FACING_UP jr z, .up cp SPRITE_FACING_LEFT jr z, .left ; right ld a, [wXBlockCoord] and a jr z, .centerTileBlock jr .rightOfCenter .down ld a, [wYBlockCoord] and a jr z, .centerTileBlock jr .belowCenter .up ld a, [wYBlockCoord] and a jr z, .aboveCenter jr .centerTileBlock .left ld a, [wXBlockCoord] and a jr z, .leftOfCenter jr .centerTileBlock .belowCenter add hl, bc .centerTileBlock add hl, bc .aboveCenter ld e, $2 add hl, de jr .next .leftOfCenter ld e, $1 add hl, bc add hl, de jr .next .rightOfCenter ld e, $3 add hl, bc add hl, de .next pop de ld a, [hl] ld c, a .loop ; find the matching tile block in the array ld a, [de] inc de inc de cp $ff ret z cp c jr nz, .loop dec de ld a, [de] ; replacement tile block from matching array entry ld [hl], a ret CutTreeBlockSwaps: ; first byte = tileset block containing the cut tree ; second byte = corresponding tileset block after the cut animation happens db $32, $6D db $33, $6C db $34, $6F db $35, $4C db $60, $6E db $0B, $0A db $3C, $35 db $3F, $35 db $3D, $36 db $FF ; list terminator