mirror of
https://github.com/a2-4am/4cade.git
synced 2024-06-07 03:29:30 +00:00
smaller and faster cover fade [thanks qkumba]
This commit is contained in:
4am
parent
4798937b9e
commit
106c8be67a
310
src/fx/fx.cover.fade.a
Normal file → Executable file
310
src/fx/fx.cover.fade.a
Normal file → Executable file
|
|
@ -1,179 +1,131 @@
|
|||
;license:MIT
|
||||
;(c) 2019 by 4am
|
||||
;
|
||||
; randomized fade-to-black routine customized for a specific piece of cover art
|
||||
; with 75 fill rectangles
|
||||
;
|
||||
; Linear Congruential Pseudo-Random Number Generator
|
||||
; (c) 2004 Bruce Clark
|
||||
; http://www.6502.org/source/integers/random/random.html
|
||||
|
||||
!cpu 6502
|
||||
!to "build/FX/COVERFADE",plain
|
||||
*=$6000
|
||||
|
||||
COUNTER = $F7
|
||||
SEED = $F8 ; 4 bytes
|
||||
TMP = $FC ; 4 bytes
|
||||
|
||||
jsr InitPRNG
|
||||
|
||||
lda #$80
|
||||
sta COUNTER
|
||||
- jsr PRNG
|
||||
lda SEED+3
|
||||
tax
|
||||
ldy COUNTER
|
||||
lda Order,x
|
||||
pha
|
||||
lda Order,y
|
||||
sta Order,x
|
||||
pla
|
||||
sta Order,y
|
||||
inc COUNTER
|
||||
bne -
|
||||
|
||||
- ldx COUNTER
|
||||
ldy Order,x
|
||||
bmi +
|
||||
lda TransformHi,y
|
||||
sta @j+2
|
||||
lda TransformLo,y
|
||||
sta @j+1
|
||||
@j jsr $FDFD ; SMC
|
||||
lda #80
|
||||
sec
|
||||
@wait1 pha
|
||||
@wait2 sbc #1
|
||||
bne @wait2
|
||||
pla
|
||||
sbc #1
|
||||
bne @wait1
|
||||
+ inc COUNTER
|
||||
bne -
|
||||
rts
|
||||
|
||||
InitPRNG
|
||||
lda $4E
|
||||
sta SEED
|
||||
lda $4F
|
||||
sta SEED+1
|
||||
lda $c050
|
||||
sta SEED+2
|
||||
lda $c000
|
||||
sta SEED+3
|
||||
rts
|
||||
|
||||
PRNG
|
||||
lda #$01
|
||||
ldx #$03
|
||||
- sta TMP,x
|
||||
lsr
|
||||
dex
|
||||
bpl -
|
||||
ldy #$20
|
||||
bne @rotateseed ; always branches
|
||||
@loop bcc @rotatetmp
|
||||
clc
|
||||
ldx #$03
|
||||
- lda TMP,x
|
||||
adc @randtable,x
|
||||
sta TMP,x
|
||||
dex
|
||||
bpl -
|
||||
@rotatetmp
|
||||
ror TMP
|
||||
ror TMP+1
|
||||
ror TMP+2
|
||||
ror TMP+3
|
||||
@rotateseed
|
||||
ror SEED+3
|
||||
ror SEED+2
|
||||
ror SEED+1
|
||||
ror SEED
|
||||
dey
|
||||
bpl @loop
|
||||
rts
|
||||
@randtable
|
||||
!byte $00,$19,$66,$0D
|
||||
|
||||
Order
|
||||
!byte 73
|
||||
!byte 31
|
||||
!byte 71
|
||||
!byte 13
|
||||
!byte 50
|
||||
!byte 36
|
||||
!byte 66
|
||||
!byte 46
|
||||
!byte 57
|
||||
!byte 18
|
||||
!byte 15
|
||||
!byte 55
|
||||
!byte 45
|
||||
!byte 26
|
||||
!byte 6
|
||||
!byte 0
|
||||
!byte 9
|
||||
!byte 8
|
||||
!byte 35
|
||||
!byte 23
|
||||
!byte 43
|
||||
!byte 44
|
||||
!byte 2
|
||||
!byte 48
|
||||
!byte 5
|
||||
!byte 52
|
||||
!byte 41
|
||||
!byte 25
|
||||
!byte 67
|
||||
!byte 56
|
||||
!byte 12
|
||||
!byte 29
|
||||
!byte 7
|
||||
!byte 34
|
||||
!byte 74
|
||||
!byte 40
|
||||
!byte 1
|
||||
!byte 72
|
||||
!byte 54
|
||||
!byte 19
|
||||
!byte 39
|
||||
!byte 58
|
||||
!byte 68
|
||||
!byte 51
|
||||
!byte 28
|
||||
!byte 33
|
||||
!byte 4
|
||||
!byte 42
|
||||
!byte 64
|
||||
!byte 60
|
||||
!byte 3
|
||||
!byte 24
|
||||
!byte 17
|
||||
!byte 27
|
||||
!byte 53
|
||||
!byte 65
|
||||
!byte 37
|
||||
!byte 69
|
||||
!byte 11
|
||||
!byte 70
|
||||
!byte 22
|
||||
!byte 63
|
||||
!byte 30
|
||||
!byte 32
|
||||
!byte 21
|
||||
!byte 61
|
||||
!byte 47
|
||||
!byte 16
|
||||
!byte 62
|
||||
!byte 49
|
||||
!byte 59
|
||||
!byte 38
|
||||
!byte 10
|
||||
!byte 20
|
||||
!byte 14
|
||||
!fill 181,$FF
|
||||
|
||||
!source "src/wait.a"
|
||||
!source "src/fx/fx.cover.fade.data.a"
|
||||
;license:MIT
|
||||
;(c) 2019-2020 by 4am/qkumba
|
||||
;
|
||||
; randomized fade-to-black routine customized for a specific piece of cover art
|
||||
; with 75 fill rectangles
|
||||
;
|
||||
|
||||
!cpu 6502
|
||||
!to "build/FX/COVERFADE",plain
|
||||
*=$6000
|
||||
|
||||
!source "src/fx/macros.a"
|
||||
|
||||
+READ_ROM_NO_WRITE
|
||||
|
||||
;init RNG
|
||||
|
||||
lda $C050
|
||||
and #$7F
|
||||
bne +
|
||||
lda #$01
|
||||
+ sta @rnd+1
|
||||
sta @exit+1
|
||||
|
||||
lda #$20
|
||||
sta $e6
|
||||
|
||||
;iterate
|
||||
|
||||
@loop ldy @rnd+1
|
||||
tya
|
||||
lsr
|
||||
bcc +
|
||||
|
||||
;feedback polynomial forms #$41 for period of 127
|
||||
|
||||
eor #$41
|
||||
+ sta @rnd+1
|
||||
cpy #75+1
|
||||
bcs +
|
||||
|
||||
lda width - 1, y
|
||||
sta $fd
|
||||
lda height - 1, y
|
||||
sta $fe
|
||||
lda startx - 1, y
|
||||
sta $ff
|
||||
lda starty - 1, y
|
||||
|
||||
-- pha
|
||||
|
||||
ldx #0
|
||||
ldy #0
|
||||
jsr $f411 ;hposn
|
||||
|
||||
lda #0
|
||||
ldx $fd
|
||||
ldy $ff
|
||||
- sta ($26), y
|
||||
iny
|
||||
dex
|
||||
bne -
|
||||
pla
|
||||
clc
|
||||
adc #1
|
||||
dec $fe
|
||||
bne --
|
||||
|
||||
lda #80
|
||||
sec
|
||||
@wait1 pha
|
||||
@wait2 sbc #1
|
||||
bne @wait2
|
||||
pla
|
||||
sbc #1
|
||||
bne @wait1
|
||||
|
||||
+
|
||||
@rnd lda #0
|
||||
@exit cmp #1
|
||||
bne @loop
|
||||
+READ_RAM1_WRITE_RAM1
|
||||
rts
|
||||
|
||||
width
|
||||
!byte 02, 03, 03, 05, 03, 03, 03, 03
|
||||
!byte 03, 03, 03, 03, 04, 04, 03, 02
|
||||
!byte 03, 03, 04, 07, 03, 02, 03, 03
|
||||
!byte 03, 03, 03, 03, 03, 03, 03, 03
|
||||
!byte 02, 03, 07, 04, 05, 03, 05, 05
|
||||
!byte 03, 04, 06, 07, 04, 03, 03, 03
|
||||
!byte 03, 02, 04, 05, 03, 03, 04, 06
|
||||
!byte 03, 02, 04, 06, 03, 03, 03, 03
|
||||
!byte 04, 03, 02, 03, 02, 03, 03, 03
|
||||
!byte 03, 03, 02
|
||||
|
||||
height
|
||||
!byte 12, 16, 26, 13, 15, 09, 24, 18
|
||||
!byte 11, 23, 17, 15, 13, 20, 22, 13
|
||||
!byte 16, 12, 21, 18, 10, 15, 10, 21
|
||||
!byte 17, 12, 12, 12, 17, 12, 08, 26
|
||||
!byte 18, 13, 44, 23, 21, 19, 17, 30
|
||||
!byte 11, 10, 25, 18, 07, 14, 13, 15
|
||||
!byte 11, 12, 28, 16, 15, 17, 35, 17
|
||||
!byte 07, 13, 12, 06, 11, 12, 19, 15
|
||||
!byte 11, 08, 13, 07, 16, 12, 24, 16
|
||||
!byte 23, 22, 11
|
||||
|
||||
startx
|
||||
!byte 000, 000, 001, 000, 000, 000, 000, 002
|
||||
!byte 003, 001, 004, 003, 003, 003, 006, 007
|
||||
!byte 005, 006, 006, 007, 008, 009, 008, 009
|
||||
!byte 010, 011, 011, 012, 012, 012, 013, 014
|
||||
!byte 015, 015, 014, 016, 017, 018, 017, 018
|
||||
!byte 020, 020, 021, 021, 022, 022, 024, 025
|
||||
!byte 024, 026, 027, 026, 028, 029, 028, 027
|
||||
!byte 030, 031, 031, 032, 034, 033, 033, 033
|
||||
!byte 032, 033, 034, 035, 036, 037, 037, 037
|
||||
!byte 037, 037, 038
|
||||
|
||||
starty
|
||||
!byte 000, 016, 042, 076, 103, 153, 167, 003
|
||||
!byte 027, 123, 049, 098, 152, 172, 008, 036
|
||||
!byte 139, 119, 071, 154, 101, 131, 181, 009
|
||||
!byte 040, 070, 115, 134, 091, 177, 008, 030
|
||||
!byte 068, 109, 128, 169, 003, 031, 058, 091
|
||||
!byte 150, 179, 117, 072, 025, 046, 002, 151
|
||||
!byte 178, 095, 008, 046, 069, 094, 118, 173
|
||||
!byte 040, 018, 058, 003, 015, 034, 079, 106
|
||||
!byte 147, 163, 178, 133, 051, 178, 148, 106
|
||||
!byte 073, 022, 000
|
||||
|
|
|
|||
File diff suppressed because it is too large
Load Diff
Loading…
Reference in New Issue
Block a user