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https://github.com/a2-4am/4cade.git
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add 48 boxes effect
This commit is contained in:
4am
parent
262589636e
commit
03af6bcabb
@ -106,6 +106,7 @@ SPIRAL
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WAVY.CORNER
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REDLINES
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FLICK
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BOXES48
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[eof]
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#
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395
src/fx/fx.hgr.48boxes.a
Normal file
395
src/fx/fx.hgr.48boxes.a
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@ -0,0 +1,395 @@
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;license:MIT
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;(c) 2020 by 4am & qkumba
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;
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!cpu 6502
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!to "build/FX/BOXES48",plain
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*=$6000
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box = $F8 ; [byte]
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stage = $F9 ; [byte]
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any = $FA ; [byte]
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rowcount = $FB ; [byte]
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src = $FC ; [word]
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dst = $FE ; [word]
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hgrlo = $00 ; [$C0 bytes]
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hgrhi = $300 ; [$C0 bytes]
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BoxStages = $C0 ; [$30 bytes]
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; recalculate HGR base addresses
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; in: X = HGR row (00..BF)
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; out: preserves X, Y
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; clobbers A
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!macro RECALC .copyflag {
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lda hgrlo, x
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!if .copyflag {
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sta src
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}
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sta dst
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lda hgrhi, x
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sta dst+1
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!if .copyflag {
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eor #$60
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sta src+1
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}
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}
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; increase X by an arbitrary amount, and recalculate HGR base addresses
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; clobbers A
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!macro INX_BY .val, .copyflag {
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txa
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clc
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adc #.val
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tax
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+RECALC .copyflag
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}
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; increase X, and recalculate HGR base addresses
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!macro INX .copyflag {
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inx
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+RECALC .copyflag
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}
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; clear or copy 1 byte
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!macro COPY .copyflag {
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!if .copyflag {
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lda (src), y
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} else {
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lda #0
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}
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sta (dst), y
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}
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; clear or copy certain bits based on bitmask
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!macro MASKCOPY .mask, .copyflag {
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lda (dst), y
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!if .copyflag {
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eor (src), y
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}
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and #.mask
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eor (dst), y
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sta (dst), y
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}
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!macro STAGE0 .copyflag {
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+INX_BY $0F, .copyflag
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iny
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iny
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+MASKCOPY %10111110, .copyflag
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+INX .copyflag
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+MASKCOPY %10111110, .copyflag
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rts
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}
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!macro STAGE1 .copyflag {
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+INX_BY $0E, .copyflag
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iny
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iny
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+COPY .copyflag
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+INX .copyflag
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+COPY .copyflag
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+INX .copyflag
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+COPY .copyflag
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+INX .copyflag
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+COPY .copyflag
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rts
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}
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!macro MIDDLE_STAGE .firstrow, .rowcount, .edgeleftmask, .edgerightmask, .leftmask, .rightmask, .copyflag {
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lda #.rowcount
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sta rowcount
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+INX_BY .firstrow, .copyflag
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iny
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--
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!if .edgeleftmask != .leftmask {
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+MASKCOPY .edgeleftmask, .copyflag
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}
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iny
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+COPY .copyflag
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!if .edgerightmask != .rightmask {
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iny
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+MASKCOPY .edgerightmask, .copyflag
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dey
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}
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dey
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-
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+MASKCOPY .leftmask, .copyflag
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iny
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iny
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+MASKCOPY .rightmask, .copyflag
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dey
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dey
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+INX .copyflag
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dec rowcount
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beq --
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bpl -
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rts
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}
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!macro OUTER_STAGE .firstrow, .rowcount, .edgeleftmask, .edgerightmask, .leftmask, .rightmask, .copyflag {
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lda #.rowcount
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sta rowcount
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+INX_BY .firstrow, .copyflag
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--
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!if .edgeleftmask != .leftmask {
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+MASKCOPY .edgeleftmask, .copyflag
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}
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iny
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+COPY .copyflag
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iny
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+COPY .copyflag
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iny
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+COPY .copyflag
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!if .edgerightmask != .rightmask {
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iny
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+MASKCOPY .edgerightmask, .copyflag
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dey
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}
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dey
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dey
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dey
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-
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+MASKCOPY .leftmask, .copyflag
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iny
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iny
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iny
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iny
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+MASKCOPY .rightmask, .copyflag
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dey
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dey
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dey
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dey
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+INX .copyflag
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dec rowcount
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beq --
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bpl -
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rts
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}
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!source "src/fx/macros.a"
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; actual code starts here
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+BUILD_HGR_LOOKUP_TABLES hgrlo, hgrhi
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ldx #47
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- lda BoxInitialStages, x
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sta BoxStages, x
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dex
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bpl -
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MainLoop lda #0
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sta any
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ldx #47
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BoxLoop stx box
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lda BoxStages, x ; for each box, get its current stage
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bmi NextBox ; if stage >= $80, nothing to do
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tax
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lda StagesHi, x
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beq NextBox ; if stage's drawing routine is 0, nothing to do
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sta j+2
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lda StagesLo, x
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sta j+1
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ldx box
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lda BoxesX, x
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ldy BoxesY, x ; Y = starting byte offset for this box
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tax ; X = starting HGR row for this box
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inc any
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j jsr $FDFD ; [SMC] call drawing routine for this stage
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NextBox ldx box
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inc BoxStages, x ; increment every box's stage every time through the loop,
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; even if we didn't call a drawing routine
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dex
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bpl BoxLoop
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lda any
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beq + ; if we didn't draw anything in any box, we're done
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bit $C000
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bpl MainLoop
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+ rts
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!source "src/wait.a"
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; box drawing routines for each stage
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; in: X = starting HGR row for this box
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; Y = starting byte offset for this box
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clear00
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+STAGE0 0
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clear01
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+STAGE1 0
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clear02
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+MIDDLE_STAGE $0D, $05, %11000000, %10000001, %11000000, %10000001, 0
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clear03
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+MIDDLE_STAGE $0C, $07, %11100000, %10000011, %10100000, %10000010, 0
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clear04
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+MIDDLE_STAGE $0B, $09, %11110000, %10000111, %10010000, %10000100, 0
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clear05
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+MIDDLE_STAGE $0A, $0B, %11111000, %10001111, %10001000, %10001000, 0
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clear06
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+MIDDLE_STAGE $09, $0D, %11111100, %10011111, %10000100, %10010000, 0
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clear07
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+MIDDLE_STAGE $08, $0F, %11111110, %10111111, %10000010, %10100000, 0
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clear08
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+MIDDLE_STAGE $07, $11, %11111111, %11111111, %10000001, %11000000, 0
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clear09
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+OUTER_STAGE $06, $13, %11000000, %10000001, %11000000, %10000001, 0
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clear0A
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+OUTER_STAGE $05, $15, %11100000, %10000011, %10100000, %10000010, 0
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clear0B
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+OUTER_STAGE $04, $17, %11110000, %10000111, %10010000, %10000100, 0
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clear0C
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+OUTER_STAGE $03, $19, %11111000, %10001111, %10001000, %10001000, 0
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clear0D
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+OUTER_STAGE $02, $1B, %11111100, %10011111, %10000100, %10010000, 0
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clear0E
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+OUTER_STAGE $01, $1D, %11111110, %10111111, %10000010, %10100000, 0
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clear0F
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+OUTER_STAGE $00, $1F, %11111111, %11111111, %10000001, %11000000, 0
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copy00
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+STAGE0 1
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copy01
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+STAGE1 1
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copy02
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+MIDDLE_STAGE $0D, $05, %11000000, %10000001, %11000000, %10000001, 1
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copy03
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+MIDDLE_STAGE $0C, $07, %11100000, %10000011, %10100000, %10000010, 1
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copy04
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+MIDDLE_STAGE $0B, $09, %11110000, %10000111, %10010000, %10000100, 1
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copy05
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+MIDDLE_STAGE $0A, $0B, %11111000, %10001111, %10001000, %10001000, 1
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copy06
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+MIDDLE_STAGE $09, $0D, %11111100, %10011111, %10000100, %10010000, 1
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copy07
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+MIDDLE_STAGE $08, $0F, %11111110, %10111111, %10000010, %10100000, 1
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copy08
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+MIDDLE_STAGE $07, $11, %11111111, %11111111, %10000001, %11000000, 1
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copy09
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+OUTER_STAGE $06, $13, %11000000, %10000001, %11000000, %10000001, 1
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copy0A
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+OUTER_STAGE $05, $15, %11100000, %10000011, %10100000, %10000010, 1
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copy0B
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+OUTER_STAGE $04, $17, %11110000, %10000111, %10010000, %10000100, 1
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copy0C
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+OUTER_STAGE $03, $19, %11111000, %10001111, %10001000, %10001000, 1
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copy0D
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+OUTER_STAGE $02, $1B, %11111100, %10011111, %10000100, %10010000, 1
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copy0E
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+OUTER_STAGE $01, $1D, %11111110, %10111111, %10000010, %10100000, 1
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copy0F
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+OUTER_STAGE $00, $1F, %11111111, %11111111, %10000001, %11000000, 1
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;
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; Boxes are laid out in a grid, left-to-right, top-down:
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; 0 1 2 3 4 5 6 7
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; 8 9 10 11 12 13 14 15
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; 16 17 18 19 20 21 22 23
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; 24 25 26 27 28 29 30 31
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; 32 33 34 35 36 37 38 39
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; 40 41 42 43 44 45 46 47
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;
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; Each box is 35x32 pixels, so each row of each box is 5 consecutive
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; bytes in memory once you calculate the HGR base address for that row.
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;
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BoxesX ; starting HGR row for each box
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!byte $00,$00,$00,$00,$00,$00,$00,$00
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!byte $20,$20,$20,$20,$20,$20,$20,$20
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!byte $40,$40,$40,$40,$40,$40,$40,$40
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!byte $60,$60,$60,$60,$60,$60,$60,$60
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!byte $80,$80,$80,$80,$80,$80,$80,$80
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!byte $A0,$A0,$A0,$A0,$A0,$A0,$A0,$A0
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BoxesY ; starting byte offset for each box
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!byte $00,$05,$0A,$0F,$14,$19,$1E,$23
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!byte $00,$05,$0A,$0F,$14,$19,$1E,$23
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!byte $00,$05,$0A,$0F,$14,$19,$1E,$23
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!byte $00,$05,$0A,$0F,$14,$19,$1E,$23
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!byte $00,$05,$0A,$0F,$14,$19,$1E,$23
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!byte $00,$05,$0A,$0F,$14,$19,$1E,$23
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; The initial grid of stages for each box.
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; Each box's stage is incremented on each iteration.
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; Negative stages (80..FF) are no-ops.
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; Positive stages (00..7F) are indexes into StagesLo/Hi array
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; to find the actual drawing routine for this stage (if any).
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BoxInitialStages
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!byte $EC,$E8,$E4,$E0,$DC,$D8,$D4,$D0
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!byte $F0,$EC,$E8,$E4,$E0,$DC,$D8,$D4
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!byte $F4,$F0,$EC,$E8,$E4,$E0,$DC,$D8
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!byte $F8,$F4,$F0,$EC,$E8,$E4,$E0,$DC
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!byte $FC,$F8,$F4,$F0,$EC,$E8,$E4,$E0
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!byte $00,$FC,$F8,$F4,$F0,$EC,$E8,$E4
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!align $FF,0,0 ; align to page
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StagesLo ; low bytes of address of drawing routine for each stage
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!byte <clear00
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!byte <clear01
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!byte <clear02
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!byte <clear03
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!byte <clear04
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!byte <clear05
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!byte <clear06
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!byte <clear07
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!byte <clear08
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!byte <clear09
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!byte <clear0A
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!byte <clear0B
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!byte <clear0C
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!byte <clear0D
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!byte <clear0E
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!byte <clear0F
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!byte 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0
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!byte 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0
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!byte <copy0F
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!byte <copy0E
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!byte <copy0D
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!byte <copy0C
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!byte <copy0B
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!byte <copy0A
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!byte <copy09
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!byte <copy08
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!byte <copy07
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!byte <copy06
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!byte <copy05
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!byte <copy04
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!byte <copy03
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!byte <copy02
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!byte <copy01
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!byte <copy00
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!byte 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0
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!byte 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0
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!byte 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0
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!byte 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0
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StagesHi ; high bytes of address of drawing routine for each stage
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!byte >clear00
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!byte >clear01
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!byte >clear02
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!byte >clear03
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!byte >clear04
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!byte >clear05
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!byte >clear06
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!byte >clear07
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!byte >clear08
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!byte >clear09
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!byte >clear0A
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!byte >clear0B
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!byte >clear0C
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!byte >clear0D
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!byte >clear0E
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!byte >clear0F
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!byte 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0
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!byte 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0
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!byte >copy0F
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!byte >copy0E
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!byte >copy0D
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!byte >copy0C
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!byte >copy0B
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!byte >copy0A
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!byte >copy09
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!byte >copy08
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!byte >copy07
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!byte >copy06
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!byte >copy05
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!byte >copy04
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!byte >copy03
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!byte >copy02
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!byte >copy01
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!byte >copy00
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!byte 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0
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!byte 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0
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!byte 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0
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!byte 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0
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