ref: 4ecff22f716aad9e9ad034cb0feae6cae273162e
dir: /macros/coords.asm/
validate_coords: MACRO IF _NARG >= 4 IF \1 >= \3 fail "x coord out of range" ENDC IF \2 >= \4 fail "y coord out of range" ENDC ELSE validate_coords \1, \2, SCREEN_WIDTH, SCREEN_HEIGHT ENDC ENDM hlcoord EQUS "coord hl," bccoord EQUS "coord bc," decoord EQUS "coord de," coord: MACRO ; register, x, y[, origin] validate_coords \2, \3 IF _NARG >= 4 ld \1, (\3) * SCREEN_WIDTH + (\2) + \4 ELSE ld \1, (\3) * SCREEN_WIDTH + (\2) + wTileMap ENDC ENDM hlbgcoord EQUS "bgcoord hl," bcbgcoord EQUS "bgcoord bc," debgcoord EQUS "bgcoord de," bgcoord: MACRO ; register, x, y[, origin] validate_coords \2, \3, BG_MAP_WIDTH, BG_MAP_HEIGHT IF _NARG >= 4 ld \1, (\3) * BG_MAP_WIDTH + (\2) + \4 ELSE ld \1, (\3) * BG_MAP_WIDTH + (\2) + vBGMap0 ENDC ENDM hlowcoord EQUS "owcoord hl," bcowcoord EQUS "owcoord bc," deowcoord EQUS "owcoord de," owcoord: MACRO ; register, x, y, map width ld \1, wOverworldMap + ((\2) + 3) + (((\3) + 3) * ((\4) + (3 * 2))) ENDM event_displacement: MACRO ; map width, x blocks, y blocks dw (wOverworldMap + 7 + (\1) + ((\1) + 6) * ((\3) >> 1) + ((\2) >> 1)) db \3, \2 ENDM dwcoord: MACRO ; x, y validate_coords \1, \2 IF _NARG >= 3 dw (\2) * SCREEN_WIDTH + (\1) + \3 ELSE dw (\2) * SCREEN_WIDTH + (\1) + wTileMap ENDC ENDM ldcoord_a: MACRO ; x, y[, origin] validate_coords \1, \2 IF _NARG >= 3 ld [(\2) * SCREEN_WIDTH + (\1) + \3], a ELSE ld [(\2) * SCREEN_WIDTH + (\1) + wTileMap], a ENDC ENDM lda_coord: MACRO ; x, y[, origin] validate_coords \1, \2 IF _NARG >= 3 ld a, [(\2) * SCREEN_WIDTH + (\1) + \3] ELSE ld a, [(\2) * SCREEN_WIDTH + (\1) + wTileMap] ENDC ENDM