diff options
Diffstat (limited to 'src/engine/home.asm')
| -rw-r--r-- | src/engine/home.asm | 23 |
1 files changed, 14 insertions, 9 deletions
diff --git a/src/engine/home.asm b/src/engine/home.asm index 948d810..a922861 100644 --- a/src/engine/home.asm +++ b/src/engine/home.asm @@ -10592,31 +10592,35 @@ Func_3917: ; 3917 (0:3917) call DisableSRAM ret -GetFloorObjectFromPos: ; 3927 (0:3927) +; return in a the permission byte corresponding to the current map's x,y coordinates at bc +GetPermissionOfMapPosition: ; 3927 (0:3927) push hl - call FindFloorTileFromPos + call GetPermissionByteOfMapPosition ld a, [hl] pop hl ret ; 0x392e -SetFloorObjectFromPos: ; 392e (0:392e) +; set to a the permission byte corresponding to the current map's x,y coordinates at bc +SetPermissionOfMapPosition: ; 392e (0:392e) push hl push af - call FindFloorTileFromPos + call GetPermissionByteOfMapPosition pop af ld [hl], a pop hl ret ; 0x3937 -UpdateFloorObjectFromPos: ; 3937 (0:3937) +; set the permission byte corresponding to the current map's x,y coordinates at bc +; to the value of register a anded by its current value +UpdatePermissionOfMapPosition: ; 3937 (0:3937) push hl push bc push de cpl ld e, a - call FindFloorTileFromPos + call GetPermissionByteOfMapPosition ld a, [hl] and e ld [hl], a @@ -10626,8 +10630,9 @@ UpdateFloorObjectFromPos: ; 3937 (0:3937) ret ; 0x3946 -; puts a floor tile in hl given coords in bc (x,y. measured in tiles) -FindFloorTileFromPos: ; 3946 (0:3946) +; returns in hl the address within wPermissionMap that corresponds to +; the current map's x,y coordinates at bc +GetPermissionByteOfMapPosition: ; 3946 (0:3946) push bc srl b srl c @@ -10637,7 +10642,7 @@ FindFloorTileFromPos: ; 3946 (0:3946) or b ld c, a ld b, $0 - ld hl, wFloorObjectMap + ld hl, wPermissionMap add hl, bc pop bc ret |