Apple-2-SW/dos33fsprogs
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bubble_gr: down to 255 bytes

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This commit is contained in:
Vince Weaver 2024-05-01 17:17:22 -04:00
parent fa07114911
commit 61bfa07ad7
1 changed files with 51 additions and 10 deletions
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61
graphics/gr/bubble_universe/bubble_tiny.s
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@ -84,6 +84,8 @@ SINES_BASE = $C0
sines = $6c00 sines = $6c00
sines2 = $6d00 sines2 = $6d00
; must be aligned :(
cosines = $6e00 cosines = $6e00
cosines2= $6f00 cosines2= $6f00
@ -97,6 +99,10 @@ bubble_gr:
;======================= ;=======================
jsr SETGR jsr SETGR
; can't rely on registers after this as different on IIe
; with 80 col card
bit FULLGR bit FULLGR
;======================== ;========================
@ -150,21 +156,54 @@ skip:
; final_sine[256-i]=0x60-quarter_sine[i]; // 192..256 ; final_sine[256-i]=0x60-quarter_sine[i]; // 192..256
setup_sine_table: setup_sine_table:
.if 0
; spread sine table ; spread sine table
ldy #32 ldy #32
; ldx #0 ; ldx #0 ; set previously
spread_loop: spread_loop:
tya
lsr
tax
lda sines_base,Y lda sines_base,Y
sta SINES_BASE,X
inx sta SINES_BASE,X ; double the output
sta SINES_BASE,X ; inx
inx ; sta SINES_BASE,X
; inx
dey dey
bne spread_loop bne spread_loop
.endif
; spread sine table
; load from sines_base,Y/2
; store to SINES_BASE,Y
; ldy #32
; ldx #0 ; set previously
spread_loop:
txa
lsr
tay
lda sines_base,Y
sta SINES_BASE,X ; double the output
; inx
; sta SINES_BASE,X
; inx
; dey
inx
cpx #64
bne spread_loop
ldx #64
; ldx #64
ldy #64 ldy #64
setup_sine_loop: setup_sine_loop:
@ -193,6 +232,7 @@ setup_sine_loop:
inx inx
; ldx #0 ; ldx #0
cosine_loop: cosine_loop:
lda sines+192,X lda sines+192,X
sta cosines,X sta cosines,X
@ -351,22 +391,23 @@ sines_base:
.endif .endif
; half as many points ; half as many points
.if 0
sines_base: sines_base:
.byte $30,$32,$34,$36,$38,$3A,$3C,$3E .byte $30,$32,$34,$36,$38,$3A,$3C,$3E
.byte $40,$42,$43,$45,$47,$48,$4A,$4C .byte $40,$42,$43,$45,$47,$48,$4A,$4C
.byte $4D,$4E,$50,$51,$52,$53,$54,$55 .byte $4D,$4E,$50,$51,$52,$53,$54,$55
.byte $56,$57,$57,$58,$58,$59,$59,$59 .byte $56,$57,$57,$58,$58,$59,$59,$59
.byte $59 .byte $59
.endif
.if 0
sines_base_reverse: sines_base_reverse:
sines_base:
.byte $59 .byte $59
.byte $59,$59,$59,$58, $58,$57,$57,$56 .byte $59,$59,$59,$58, $58,$57,$57,$56
.byte $55,$54,$53,$52, $51,$50,$4E,$4D .byte $55,$54,$53,$52, $51,$50,$4E,$4D
.byte $4C,$4A,$48,$47, $45,$43,$42,$40 .byte $4C,$4A,$48,$47, $45,$43,$42,$40
.byte $3E,$3C,$3A,$38, $36,$34,$32,$30 .byte $3E,$3C,$3A,$38, $36,$34,$32,$30
.endif
.if 0 .if 0
; 26 - x^2/64+2x ; 26 - x^2/64+2x