gr: some more graphics work
This commit is contained in:
Vince Weaver
parent
bc976718a5
commit
dbeb4a5388
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@ -6,10 +6,11 @@ LINKERSCRIPTS = ../../../linker_scripts
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all: plasma.dsk
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plasma.dsk: HELLO PLASMA PLASMA_TINY PLASMA_BOT WIRES WIRES_BOT
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plasma.dsk: HELLO PLASMA PLASMA_128 PLASMA_TINY PLASMA_BOT WIRES WIRES_BOT
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cp empty.dsk plasma.dsk
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$(DOS33) -y plasma.dsk SAVE A HELLO
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$(DOS33) -y plasma.dsk BSAVE -a 0x300 PLASMA
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$(DOS33) -y plasma.dsk BSAVE -a 0x70 PLASMA
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$(DOS33) -y plasma.dsk BSAVE -a 0x70 PLASMA_128
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$(DOS33) -y plasma.dsk BSAVE -a 0xC00 PLASMA_TINY
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$(DOS33) -y plasma.dsk BSAVE -a 0x36B PLASMA_BOT
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$(DOS33) -y plasma.dsk BSAVE -a 0xC00 WIRES
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@ -23,13 +24,22 @@ HELLO: hello.bas
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###
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PLASMA: plasma.o
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ld65 -o PLASMA plasma.o -C $(LINKERSCRIPTS)/apple2_300.inc
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ld65 -o PLASMA plasma.o -C ./apple2_70_zp.inc
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plasma.o: plasma.s
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ca65 -o plasma.o plasma.s -l plasma.lst
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###
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PLASMA_128: plasma_128.o
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ld65 -o PLASMA_128 plasma_128.o -C ./apple2_70_zp.inc
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plasma_128.o: plasma_128.s
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ca65 -o plasma_128.o plasma_128.s -l plasma_128.lst
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###
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PLASMA_BOT: plasma_bot.o
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ld65 -o PLASMA_BOT plasma_bot.o -C ./apple2_36b.inc
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@ -67,4 +77,4 @@ wires_bot.o: wires_bot.s
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###
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clean:
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rm -f *~ *.o *.lst PLASMA PLASMA_TINY PLASMA_BOT WIRES WIRES_BOT
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rm -f *~ *.o *.lst PLASMA PLASMA_128 PLASMA_TINY PLASMA_BOT WIRES WIRES_BOT
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@ -0,0 +1,12 @@
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MEMORY {
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ZP: start = $70, size = $90, type = rw;
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RAM: start = $70, size = $8E00, file = %O;
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}
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SEGMENTS {
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#CODE: load = RAM, type = ro;
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#RODATA: load = RAM, type = ro;
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#DATA: load = RAM, type = rw;
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#BSS: load = RAM, type = bss, define = yes;
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ZEROPAGE: load = ZP, type = ro;
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}
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@ -18,13 +18,39 @@
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; 141 -- smc DRAW_PAGE
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; 139 -- from qkumba, remove php/plp
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; 138 -- from qkumba, remove SAVEX
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; 133 -- run from zero page
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; 132 -- make lookup 8*sin+7
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; 131 -- re-arrange sine table
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; 128 -- call into PLOT for MASK seting
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; 127 -- base YY<<16 by adding smc, not by shifting
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; 125 -- realize that the top byte wraps so no need to and
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; 124 -- re-arrange code to make an CLC unnecessary
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; goal=135
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; urgh lovebyte wants 124 byte (counts header)
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.include "zp.inc"
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.include "hardware.inc"
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; zero page
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GBASL = $26
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GBASH = $27
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MASK = $2E
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COLOR = $30
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;CTEMP = $68
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YY = $69
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; soft-switches
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FULLGR = $C052
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PAGE1 = $C054
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; ROM routines
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PLOT1 = $F80E ;; PLOT at (GBASL),Y (need MASK to be $0f or $f0)
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GBASCALC= $F847 ;; take Y-coord/2 in A, put address in GBASL/H ( a trashed, C clear)
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SETCOL = $F864 ;; COLOR=A*17
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SETGR = $FB40
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.zeropage
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.globalzp colorlookup,plot_lookup_smc,draw_page_smc,frame_smc,sinetable
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CTEMP = $FC
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;================================
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; Clear screen and setup graphics
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@ -42,25 +68,27 @@ plasma:
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; we only create a 16x16 texture, which we pattern across 40x48 screen
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; I've tried re-optimizing this about 10 different ways
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; and it never ends up shorter
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create_lookup:
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ldy #15
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create_yloop:
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ldx #15
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create_yloop:
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ldy #15
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create_xloop:
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clc
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lda #15 ; 8+8 (but 15 works better)
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adc sinetable,X
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adc sinetable,Y
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sec
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lda sinetable,X
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adc sinetable,Y ; 15+sin(x)+sin(y)
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lsr
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lookup_smc:
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sta lookup ; always starts at $d00
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inc lookup_smc+1
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dex
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dey
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bpl create_xloop
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dey
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dex
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bpl create_yloop
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; X and Y both $FF
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@ -70,34 +98,30 @@ create_lookup_done:
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forever_loop:
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cycle_colors:
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; cycle colors
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; instead of advancing entire frame, do slightly slower route
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; instead now and just incrememnting the frame and doing the
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; adjustment at plot time.
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; can't do palette rotate on Apple II so faking it here
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; just incrementing every entry in texture by 1
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; X if $FF when arriving here
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; ldx #0
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inx ; make X 0
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cycle_loop:
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inc lookup,X
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inx
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bne cycle_loop
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; increment frame
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inc frame_smc+1
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; set/flip pages
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; we want to flip pages and then draw to the offscreen one
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flip_pages:
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; ldx #0 ; x already 0
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; ldy #0
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iny ; y is $FF, make it 0
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lda draw_page_smc+1 ; DRAW_PAGE
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beq done_page
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inx
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iny
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done_page:
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ldy PAGE0,X ; set display page to PAGE1 or PAGE2
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ldx PAGE1,Y ; set display page to PAGE1 or PAGE2
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eor #$4 ; flip draw page between $400/$800
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sta draw_page_smc+1 ; DRAW_PAGE
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@ -109,26 +133,13 @@ done_page:
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plot_frame:
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ldx #47 ; YY=47 (count backwards)
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plot_yloop:
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txa ; get (y&0xf)<<4
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pha ; save YY
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asl
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asl
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asl
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asl
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sta CTEMP ; save for later
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txa ; get Y in accumulator
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txa ; get YY into A
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pha ; save X for later
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lsr ; call actually wants Ycoord/2
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ldy #$0f ; setup mask for odd/even line
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bcc plot_mask
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ldy #$f0 ; needlessly clever, from monitor rom src
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plot_mask:
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sty MASK
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php ; save C flag for mask handling
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; ugh can't use PLOT trick as it always will draw something
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; to PAGE1 even if we don't want to
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@ -141,34 +152,43 @@ draw_page_smc:
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adc #0
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sta GBASH
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; increment YY in top nibble of lookup for (yy<<16)+xx
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; clc from above, C always 0
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lda plot_lookup_smc+1
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adc #$10 ; no need to mask as it will oflo and be ignored
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sta plot_lookup_smc+1
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;==========
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ldy #39 ; XX = 39 (countdown)
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; sets MASK by calling into middle of PLOT routine
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; by Y being 39 draw in a spot that gets over-written
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plp
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jsr $f806
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plot_xloop:
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tya ; get x&0xf
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tya ; get XX & 0x0f
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and #$f
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ora CTEMP ; combine with val from earlier
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; get ((y&0xf)*16)+x
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tax
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plot_lookup:
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; sta plot_lookup_smc+1
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plot_lookup_smc:
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lda lookup,X ; load lookup, (y*16)+x
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; lda lookup ; load lookup, (y*16)+x
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lda lookup,X ; load lookup, (YY*16)+XX
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clc
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frame_smc:
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adc #$00 ; add in frame
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and #$f
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lsr ; we actually only have 8 colors
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tax
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lda colorlookup,X ; lookup color
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sta COLOR ; each nibble should be same
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jsr PLOT1 ; plot at GBASL,Y (x co-ord goes in Y)
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@ -178,29 +198,28 @@ plot_lookup_smc:
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pla ; restore YY
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tax
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dex
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bpl plot_yloop
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bmi forever_loop
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colorlookup:
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bw_color_lookup:
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; blue
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.byte $55,$22,$66,$77,$ff,$77,$55 ; ,$00 shared w sin table
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; pink
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;.byte $55,$11,$33,$bb,$ff,$bb,$55 ; ,$00 shared w sin table
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; this is actually 8*sin(x)
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sinetable:
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.byte $00,$03,$05,$07,$08,$07,$05,$03
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.byte $00,$FD,$FB,$F9,$F8,$F9,$FB,$FD
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; this is actually (8*sin(x))+7
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; re-arranged so starts with $00 for colorlookup overlap
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.byte $00,$FF
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HACK: ; use the $0200 here for (HACK),Y addressing?
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; in the end no way to get Y set properly
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.byte $00,$02,$04
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.byte $07,$0A,$0C,$0E,$0F,$0E,$0C,$0A
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.byte $07,$04,$02
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;colorlookup:
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;.byte $00,$00,$05,$05,$07,$07,$0f,$0f
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;.byte $07,$07,$06,$06,$02,$02,$05,$05
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;.byte $00,$55,$77,$ff,$77,$66,$22,$55
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; make lookup happen at page boundary
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.org $d00
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.org $200
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lookup:
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@ -0,0 +1,221 @@
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; do a (hopefully fast) plasma type demo
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; 151 -- original
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; 137 -- optimize generation
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; 136 -- align lookup table so we can index it easier
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; 130 -- optimize indexing of lookup
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; 126 -- run loops backaward
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; 124 -- notice X already 0 before plot
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; 131 -- use GBASCALC. much faster, but 7 bytes larger
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; 129 -- run loop backwards
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; 128 -- set color ourselves
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; 127 -- overlap color lookup with sine table
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; 119 -- forgot to comment out unused
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; 121 -- make it use full screen (40x48)
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; 149 -- add page flipping
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; 144 -- optimize a bit
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; 141 -- smc DRAW_PAGE
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; 139 -- from qkumba, remove php/plp
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; 138 -- from qkumba, remove SAVEX
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; 133 -- run from zero page
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; 132 -- make lookup 8*sin+7
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; 131 -- re-arrange sine table
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; 128 -- call into PLOT for MASK seting
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; urgh lovebyte wants 124 byte (counts header)
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; zero page
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GBASL = $26
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GBASH = $27
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MASK = $2E
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COLOR = $30
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CTEMP = $68
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; soft-switches
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FULLGR = $C052
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PAGE0 = $C054
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; ROM routines
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PLOT1 = $F80E ;; PLOT at (GBASL),Y (need MASK to be $0f or $f0)
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GBASCALC= $F847 ;; take Y-coord/2 in A, put address in GBASL/H ( a trashed, C clear)
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SETCOL = $F864 ;; COLOR=A*17
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SETGR = $FB40
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.zeropage
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.globalzp sinetable,colorlookup,draw_page_smc
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;================================
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; Clear screen and setup graphics
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;================================
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plasma:
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jsr SETGR ; set lo-res 40x40 mode
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bit FULLGR ; make it 40x48
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; color = ( 8.0 + 8*sin(x) + 8.0 + 8*sin(y) )/2
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; becomes
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; color = ( 16 + (sintable[xx&0xf]) + (sintable[yy&0xf])) / 2;
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; we only create a 16x16 texture, which we pattern across 40x48 screen
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create_lookup:
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ldy #15
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create_yloop:
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ldx #15
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create_xloop:
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sec
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lda sinetable,X
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adc sinetable,Y ; 15+sin(x)+sin(y)
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lsr
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lookup_smc:
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sta lookup ; always starts at $d00
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inc lookup_smc+1
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dex
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bpl create_xloop
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dey
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bpl create_yloop
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; X and Y both $FF
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create_lookup_done:
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forever_loop:
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cycle_colors:
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; cycle colors
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; can't do palette rotate on Apple II so faking it here
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; just incrementing every entry in texture by 1
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; X if $FF when arriving here
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; ldx #0
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inx ; make X 0
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cycle_loop:
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inc lookup,X
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inx
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bne cycle_loop
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; set/flip pages
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; we want to flip pages and then draw to the offscreen one
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flip_pages:
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; ldx #0 ; x already 0
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lda draw_page_smc+1 ; DRAW_PAGE
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beq done_page
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inx
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done_page:
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ldy PAGE0,X ; set display page to PAGE1 or PAGE2
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eor #$4 ; flip draw page between $400/$800
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sta draw_page_smc+1 ; DRAW_PAGE
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; plot current frame
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; scan whole 40x48 screen and plot each point based on
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; lookup table colors
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plot_frame:
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ldx #47 ; YY=47 (count backwards)
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plot_yloop:
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txa ; get (y&0xf)<<4
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pha ; save YY
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asl
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asl
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asl
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asl
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sta CTEMP ; save for later
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|
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txa ; get Y in accumulator
|
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lsr ; call actually wants Ycoord/2
|
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|
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php ; save C flag for mask handling
|
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|
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; ugh can't use PLOT trick as it always will draw something
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; to PAGE1 even if we don't want to
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jsr GBASCALC ; point GBASL/H to address in (A is ycoord/2)
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; after, A is GBASL, C is clear
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lda GBASH ; adjust to be PAGE1/PAGE2 ($400 or $800)
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draw_page_smc:
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adc #0
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sta GBASH
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;==========
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ldy #39 ; XX = 39 (countdown)
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; sets MASK by calling into middle of PLOT routine
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; by Y being 39 draw in a spot that gets over-written
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plp
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jsr $f806
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plot_xloop:
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|
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tya ; get x&0xf
|
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and #$f
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ora CTEMP ; combine with val from earlier
|
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; get ((y&0xf)*16)+x
|
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|
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tax
|
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|
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plot_lookup:
|
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plot_lookup_smc:
|
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lda lookup,X ; load lookup, (y*16)+x
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|
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and #$f
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lsr ; we actually only have 8 colors
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tax
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lda colorlookup,X ; lookup color
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sta COLOR ; each nibble should be same
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jsr PLOT1 ; plot at GBASL,Y (x co-ord goes in Y)
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|
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dey
|
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bpl plot_xloop
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|
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pla ; restore YY
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tax
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|
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dex
|
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bpl plot_yloop
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bmi forever_loop
|
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|
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colorlookup:
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|
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; blue
|
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.byte $55,$22,$66,$77,$ff,$77,$55 ; ,$00 shared w sin table
|
||||
|
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|
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sinetable:
|
||||
; this is actually (8*sin(x))+7
|
||||
; re-arranged so starts with $00 for colorlookup overlap
|
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.byte $00,$FF,$00,$02,$04
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.byte $07,$0A,$0C,$0E,$0F,$0E,$0C,$0A
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.byte $07,$04,$02
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; make lookup happen at page boundary
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.org $d00
|
||||
lookup:
|
||||
|
|
@ -6,11 +6,12 @@ LINKERSCRIPTS = ../../../linker_scripts
|
|||
|
||||
all: sier.dsk
|
||||
|
||||
sier.dsk: HELLO SIER SIER_TINY
|
||||
sier.dsk: HELLO SIER SIER_TINY SIER_64
|
||||
cp empty.dsk sier.dsk
|
||||
$(DOS33) -y sier.dsk SAVE A HELLO
|
||||
$(DOS33) -y sier.dsk BSAVE -a 0x36C SIER
|
||||
$(DOS33) -y sier.dsk BSAVE -a 0x300 SIER_TINY
|
||||
$(DOS33) -y sier.dsk BSAVE -a 0x300 SIER_64
|
||||
|
||||
###
|
||||
|
||||
|
|
@ -33,8 +34,17 @@ SIER_TINY: sier_tiny.o
|
|||
sier_tiny.o: sier_tiny.s
|
||||
ca65 -o sier_tiny.o sier_tiny.s -l sier_tiny.lst
|
||||
|
||||
###
|
||||
|
||||
SIER_64: sier_64.o
|
||||
ld65 -o SIER_64 sier_64.o -C $(LINKERSCRIPTS)/apple2_300.inc
|
||||
|
||||
sier_64.o: sier_64.s
|
||||
ca65 -o sier_64.o sier_64.s -l sier_64.lst
|
||||
|
||||
|
||||
|
||||
###
|
||||
|
||||
clean:
|
||||
rm -f *~ *.o *.lst HELLO SIER SIER_TINY
|
||||
rm -f *~ *.o *.lst HELLO SIER SIER_TINY SIER_64
|
||||
|
|
|
|||
|
|
@ -0,0 +1,94 @@
|
|||
; fake sierpinski
|
||||
|
||||
; scrolling and colors
|
||||
|
||||
; by Vince `deater` Weaver, dSr, Lovebyte 2021
|
||||
|
||||
; just plot XX AND YY
|
||||
|
||||
; zero page
|
||||
COLOR = $30
|
||||
XX = $66
|
||||
YY = $67
|
||||
FRAME = $68
|
||||
;X2 = $69
|
||||
|
||||
; soft-switches
|
||||
FULLGR = $C052
|
||||
|
||||
; rom routines
|
||||
PLOT = $F800 ;; PLOT AT Y,A
|
||||
PLOT1 = $F80E ;; PLOT at (GBASL),Y (need MASK to be $0f or $f0)
|
||||
SETCOL = $F864 ;; COLOR=A
|
||||
SETGR = $FB40
|
||||
|
||||
;================================
|
||||
; Clear screen and setup graphics
|
||||
;================================
|
||||
sier:
|
||||
|
||||
jsr SETGR ; set lo-res 40x40 mode
|
||||
bit FULLGR ; make it 40x48
|
||||
|
||||
lda #0
|
||||
sta FRAME
|
||||
|
||||
sier_loop:
|
||||
|
||||
inc FRAME
|
||||
|
||||
ldx #47 ; YY
|
||||
|
||||
sier_yloop:
|
||||
|
||||
lda #39
|
||||
sta XX
|
||||
|
||||
tay
|
||||
txa
|
||||
jsr PLOT ; PLOT AT Y,A
|
||||
; sets GBASL/GBASH and MASK
|
||||
|
||||
sier_xloop:
|
||||
|
||||
txa
|
||||
clc
|
||||
adc FRAME
|
||||
|
||||
; sta X2
|
||||
; lda XX
|
||||
; adc FRAME
|
||||
; and X2
|
||||
|
||||
and XX
|
||||
|
||||
bne black
|
||||
; lda #$11 ; red
|
||||
lda FRAME
|
||||
lsr
|
||||
lsr
|
||||
lsr
|
||||
lsr
|
||||
bne not_zero
|
||||
lda #3
|
||||
|
||||
not_zero:
|
||||
|
||||
.byte $2C ; bit trick
|
||||
black:
|
||||
lda #$00
|
||||
; sta COLOR
|
||||
jsr SETCOL
|
||||
|
||||
ldy XX
|
||||
txa
|
||||
jsr PLOT1 ; PLOT AT (GBASL),Y
|
||||
|
||||
dec XX
|
||||
bpl sier_xloop
|
||||
|
||||
dex
|
||||
bpl sier_yloop
|
||||
|
||||
done:
|
||||
bmi sier_loop
|
||||
|
|
@ -0,0 +1,12 @@
|
|||
MEMORY {
|
||||
ZP: start = $00, size = $1A, type = rw;
|
||||
RAM: start = $36B, size = $8E00, file = %O;
|
||||
}
|
||||
|
||||
SEGMENTS {
|
||||
CODE: load = RAM, type = ro, align = $1;
|
||||
RODATA: load = RAM, type = ro;
|
||||
DATA: load = RAM, type = rw;
|
||||
BSS: load = RAM, type = bss, define = yes;
|
||||
ZEROPAGE: load = ZP, type = zp;
|
||||
}
|
||||
Loading…
Reference in New Issue