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