summaryrefslogtreecommitdiff
path: root/yellow/bank3c/overworld.asm
diff options
context:
space:
mode:
Diffstat (limited to 'yellow/bank3c/overworld.asm')
-rw-r--r--yellow/bank3c/overworld.asm438
1 files changed, 243 insertions, 195 deletions
diff --git a/yellow/bank3c/overworld.asm b/yellow/bank3c/overworld.asm
index 7ecac223..30a50431 100644
--- a/yellow/bank3c/overworld.asm
+++ b/yellow/bank3c/overworld.asm
@@ -1,195 +1,243 @@
-SECTION "bank3c",ROMX[$401c],BANK[$3c]
-_AdvancePlayerSprite:: ; f010c (3c:f010c)
- ld a,[wSpriteStateData1 + 3] ; delta Y
- ld b,a
- ld a,[wSpriteStateData1 + 5] ; delta X
- ld c,a
- ld hl,wWalkCounter ; walking animation counter
- dec [hl]
- jr nz,.afterUpdateMapCoords
-; if it's the end of the animation, update the player's map coordinates
- ld a,[W_YCOORD]
- add b
- ld [W_YCOORD],a
- ld a,[W_XCOORD]
- add c
- ld [W_XCOORD],a
-.afterUpdateMapCoords
- ld a,[wWalkCounter] ; walking animation counter
- cp a,$07
- jp nz,.scrollBackgroundAndSprites
-; if this is the first iteration of the animation
- ld a,c
- cp a,$01
- jr nz,.checkIfMovingWest
-; moving east
- ld a,[wMapViewVRAMPointer]
- ld e,a
- and a,$e0
- ld d,a
- ld a,e
- add a,$02
- and a,$1f
- or d
- ld [wMapViewVRAMPointer],a
- jr .adjustXCoordWithinBlock
-.checkIfMovingWest
- cp a,$ff
- jr nz,.checkIfMovingSouth
-; moving west
- ld a,[wMapViewVRAMPointer]
- ld e,a
- and a,$e0
- ld d,a
- ld a,e
- sub a,$02
- and a,$1f
- or d
- ld [wMapViewVRAMPointer],a
- jr .adjustXCoordWithinBlock
-.checkIfMovingSouth
- ld a,b
- cp a,$01
- jr nz,.checkIfMovingNorth
-; moving south
- ld a,[wMapViewVRAMPointer]
- add a,$40
- ld [wMapViewVRAMPointer],a
- jr nc,.adjustXCoordWithinBlock
- ld a,[wMapViewVRAMPointer + 1]
- inc a
- and a,$03
- or a,$98
- ld [wMapViewVRAMPointer + 1],a
- jr .adjustXCoordWithinBlock
-.checkIfMovingNorth
- cp a,$ff
- jr nz,.adjustXCoordWithinBlock
-; moving north
- ld a,[wMapViewVRAMPointer]
- sub a,$40
- ld [wMapViewVRAMPointer],a
- jr nc,.adjustXCoordWithinBlock
- ld a,[wMapViewVRAMPointer + 1]
- dec a
- and a,$03
- or a,$98
- ld [wMapViewVRAMPointer + 1],a
-.adjustXCoordWithinBlock
- ld a,c
- and a
- jr z,.pointlessJump ; mistake?
-.pointlessJump
- ld hl,W_XBLOCKCOORD
- ld a,[hl]
- add c
- ld [hl],a
- cp a,$02
- jr nz,.checkForMoveToWestBlock
-; moved into the tile block to the east
- xor a
- ld [hl],a
- ld hl,wXOffsetSinceLastSpecialWarp
- inc [hl]
- ld de,wCurrentTileBlockMapViewPointer
- call MoveTileBlockMapPointerEast
- jr .updateMapView
-.checkForMoveToWestBlock
- cp a,$ff
- jr nz,.adjustYCoordWithinBlock
-; moved into the tile block to the west
- ld a,$01
- ld [hl],a
- ld hl,wXOffsetSinceLastSpecialWarp
- dec [hl]
- ld de,wCurrentTileBlockMapViewPointer
- call MoveTileBlockMapPointerWest
- jr .updateMapView
-.adjustYCoordWithinBlock
- ld hl,W_YBLOCKCOORD
- ld a,[hl]
- add b
- ld [hl],a
- cp a,$02
- jr nz,.checkForMoveToNorthBlock
-; moved into the tile block to the south
- xor a
- ld [hl],a
- ld hl,wYOffsetSinceLastSpecialWarp
- inc [hl]
- ld de,wCurrentTileBlockMapViewPointer
- ld a,[W_CURMAPWIDTH]
- call MoveTileBlockMapPointerSouth
- jr .updateMapView
-.checkForMoveToNorthBlock
- cp a,$ff
- jr nz,.updateMapView
-; moved into the tile block to the north
- ld a,$01
- ld [hl],a
- ld hl,wYOffsetSinceLastSpecialWarp
- dec [hl]
- ld de,wCurrentTileBlockMapViewPointer
- ld a,[W_CURMAPWIDTH]
- call MoveTileBlockMapPointerNorth
-.updateMapView
- call LoadCurrentMapView
- ld a,[wSpriteStateData1 + 3] ; delta Y
- cp a,$01
- jr nz,.checkIfMovingNorth2
-; if moving south
- call ScheduleSouthRowRedraw
- jr .scrollBackgroundAndSprites
-.checkIfMovingNorth2
- cp a,$ff
- jr nz,.checkIfMovingEast2
-; if moving north
- call ScheduleNorthRowRedraw
- jr .scrollBackgroundAndSprites
-.checkIfMovingEast2
- ld a,[wSpriteStateData1 + 5] ; delta X
- cp a,$01
- jr nz,.checkIfMovingWest2
-; if moving east
- call ScheduleEastColumnRedraw
- jr .scrollBackgroundAndSprites
-.checkIfMovingWest2
- cp a,$ff
- jr nz,.scrollBackgroundAndSprites
-; if moving west
- call ScheduleWestColumnRedraw
-.scrollBackgroundAndSprites
- ld a,[wSpriteStateData1 + 3] ; delta Y
- ld b,a
- ld a,[wSpriteStateData1 + 5] ; delta X
- ld c,a
- sla b
- sla c
- ld a,[hSCY]
- add b
- ld [hSCY],a ; update background scroll Y
- ld a,[hSCX]
- add c
- ld [hSCX],a ; update background scroll X
-; shift all the sprites in the direction opposite of the player's motion
-; so that the player appears to move relative to them
- ld hl,wSpriteStateData1 + $14
- ld a,[W_NUMSPRITES] ; number of sprites
- and a ; are there any sprites?
- jr z,.done
- ld e,a
-.spriteShiftLoop
- ld a,[hl]
- sub b
- ld [hli],a
- inc l
- ld a,[hl]
- sub c
- ld [hl],a
- ld a,$0e
- add l
- ld l,a
- dec e
- jr nz,.spriteShiftLoop
-.done
- ret
+SECTION "bank3c",ROMX[$410c],BANK[$3c]
+_AdvancePlayerSprite:: ; f010c (3c:410c)
+ ld a,[wSpriteStateData1 + 3] ; delta Y
+ ld b,a
+ ld a,[wSpriteStateData1 + 5] ; delta X
+ ld c,a
+ ld hl,wWalkCounter ; walking animation counter
+ dec [hl]
+ jr nz,.afterUpdateMapCoords
+; if it's the end of the animation, update the player's map coordinates
+ ld a,[W_YCOORD]
+ add b
+ ld [W_YCOORD],a
+ ld a,[W_XCOORD]
+ add c
+ ld [W_XCOORD],a
+.afterUpdateMapCoords
+ ld a,[wWalkCounter] ; walking animation counter
+ cp a,$07
+ jp nz,.scrollBackgroundAndSprites
+; if this is the first iteration of the animation
+ ld a,c
+ cp a,$01
+ jr nz,.checkIfMovingWest
+; moving east
+ ld a,[wMapViewVRAMPointer]
+ ld e,a
+ and a,$e0
+ ld d,a
+ ld a,e
+ add a,$02
+ and a,$1f
+ or d
+ ld [wMapViewVRAMPointer],a
+ jr .adjustXCoordWithinBlock
+.checkIfMovingWest
+ cp a,$ff
+ jr nz,.checkIfMovingSouth
+; moving west
+ ld a,[wMapViewVRAMPointer]
+ ld e,a
+ and a,$e0
+ ld d,a
+ ld a,e
+ sub a,$02
+ and a,$1f
+ or d
+ ld [wMapViewVRAMPointer],a
+ jr .adjustXCoordWithinBlock
+.checkIfMovingSouth
+ ld a,b
+ cp a,$01
+ jr nz,.checkIfMovingNorth
+; moving south
+ ld a,[wMapViewVRAMPointer]
+ add a,$40
+ ld [wMapViewVRAMPointer],a
+ jr nc,.adjustXCoordWithinBlock
+ ld a,[wMapViewVRAMPointer + 1]
+ inc a
+ and a,$03
+ or a,$98
+ ld [wMapViewVRAMPointer + 1],a
+ jr .adjustXCoordWithinBlock
+.checkIfMovingNorth
+ cp a,$ff
+ jr nz,.adjustXCoordWithinBlock
+; moving north
+ ld a,[wMapViewVRAMPointer]
+ sub a,$40
+ ld [wMapViewVRAMPointer],a
+ jr nc,.adjustXCoordWithinBlock
+ ld a,[wMapViewVRAMPointer + 1]
+ dec a
+ and a,$03
+ or a,$98
+ ld [wMapViewVRAMPointer + 1],a
+.adjustXCoordWithinBlock
+ ld a,c
+ and a
+ jr z,.pointlessJump ; mistake?
+.pointlessJump
+ ld hl,W_XBLOCKCOORD
+ ld a,[hl]
+ add c
+ ld [hl],a
+ cp a,$02
+ jr nz,.checkForMoveToWestBlock
+; moved into the tile block to the east
+ xor a
+ ld [hl],a
+ ld hl,wXOffsetSinceLastSpecialWarp
+ inc [hl]
+ ld de,wCurrentTileBlockMapViewPointer
+ call MoveTileBlockMapPointerEast
+ jr .updateMapView
+.checkForMoveToWestBlock
+ cp a,$ff
+ jr nz,.adjustYCoordWithinBlock
+; moved into the tile block to the west
+ ld a,$01
+ ld [hl],a
+ ld hl,wXOffsetSinceLastSpecialWarp
+ dec [hl]
+ ld de,wCurrentTileBlockMapViewPointer
+ call MoveTileBlockMapPointerWest
+ jr .updateMapView
+.adjustYCoordWithinBlock
+ ld hl,W_YBLOCKCOORD
+ ld a,[hl]
+ add b
+ ld [hl],a
+ cp a,$02
+ jr nz,.checkForMoveToNorthBlock
+; moved into the tile block to the south
+ xor a
+ ld [hl],a
+ ld hl,wYOffsetSinceLastSpecialWarp
+ inc [hl]
+ ld de,wCurrentTileBlockMapViewPointer
+ ld a,[W_CURMAPWIDTH]
+ call MoveTileBlockMapPointerSouth
+ jr .updateMapView
+.checkForMoveToNorthBlock
+ cp a,$ff
+ jr nz,.updateMapView
+; moved into the tile block to the north
+ ld a,$01
+ ld [hl],a
+ ld hl,wYOffsetSinceLastSpecialWarp
+ dec [hl]
+ ld de,wCurrentTileBlockMapViewPointer
+ ld a,[W_CURMAPWIDTH]
+ call MoveTileBlockMapPointerNorth
+.updateMapView
+ call LoadCurrentMapView
+ ld a,[wSpriteStateData1 + 3] ; delta Y
+ cp a,$01
+ jr nz,.checkIfMovingNorth2
+; if moving south
+ call ScheduleSouthRowRedraw
+ jr .scrollBackgroundAndSprites
+.checkIfMovingNorth2
+ cp a,$ff
+ jr nz,.checkIfMovingEast2
+; if moving north
+ call ScheduleNorthRowRedraw
+ jr .scrollBackgroundAndSprites
+.checkIfMovingEast2
+ ld a,[wSpriteStateData1 + 5] ; delta X
+ cp a,$01
+ jr nz,.checkIfMovingWest2
+; if moving east
+ call ScheduleEastColumnRedraw
+ jr .scrollBackgroundAndSprites
+.checkIfMovingWest2
+ cp a,$ff
+ jr nz,.scrollBackgroundAndSprites
+; if moving west
+ call ScheduleWestColumnRedraw
+.scrollBackgroundAndSprites
+ ld a,[wSpriteStateData1 + 3] ; delta Y
+ ld b,a
+ ld a,[wSpriteStateData1 + 5] ; delta X
+ ld c,a
+ sla b
+ sla c
+ ld a,[hSCY]
+ add b
+ ld [hSCY],a ; update background scroll Y
+ ld a,[hSCX]
+ add c
+ ld [hSCX],a ; update background scroll X
+; shift all the sprites in the direction opposite of the player's motion
+; so that the player appears to move relative to them
+ ld hl,wSpriteStateData1 + $14
+ ld a,[W_NUMSPRITES] ; number of sprites
+ and a ; are there any sprites?
+ jr z,.done
+ ld e,a
+.spriteShiftLoop
+ ld a,[hl]
+ sub b
+ ld [hli],a
+ inc l
+ ld a,[hl]
+ sub c
+ ld [hl],a
+ ld a,$0e
+ add l
+ ld l,a
+ dec e
+ jr nz,.spriteShiftLoop
+.done
+ ret
+
+MoveTileBlockMapPointerEast:: ; 0e65 (0:0e65)
+ ld a,[de]
+ add a,$01
+ ld [de],a
+ ret nc
+ inc de
+ ld a,[de]
+ inc a
+ ld [de],a
+ ret
+
+MoveTileBlockMapPointerWest:: ; 0e6f (0:0e6f)
+ ld a,[de]
+ sub a,$01
+ ld [de],a
+ ret nc
+ inc de
+ ld a,[de]
+ dec a
+ ld [de],a
+ ret
+
+MoveTileBlockMapPointerSouth:: ; 0e79 (0:0e79)
+ add a,$06
+ ld b,a
+ ld a,[de]
+ add b
+ ld [de],a
+ ret nc
+ inc de
+ ld a,[de]
+ inc a
+ ld [de],a
+ ret
+
+MoveTileBlockMapPointerNorth:: ; 0e85 (0:0e85)
+ add a,$06
+ ld b,a
+ ld a,[de]
+ sub b
+ ld [de],a
+ ret nc
+ inc de
+ ld a,[de]
+ dec a
+ ld [de],a
+ ret \ No newline at end of file
generated by cgit v1.2.3 (git 2.25.1) at 2025-07-22 03:44:23 +0000