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uxn/projects/examples/demos/automata.tal
2021-05-31 14:50:36 -07:00

119 lines
No EOL
2.1 KiB
Tal

( Project by Alex Schroeder - https://alexschroeder.ch )
%RTN { JMP2r }
%INCR { SWP #01 ADD SWP }
%CELL { #1000 }
%NEXT { #2000 }
( devices )
|00 @System [ &vector $2 &pad $6 &r $2 &g $2 &b $2 ]
|20 @Screen [ &vector $2 &width $2 &height $2 &pad $2 &x $2 &y $2 &addr $2 &color $1 ]
|b0 @DateTime [ &year $2 &month $1 &day $1 &hour $1 &minute $1 &second $1 &dotw $1 &doty $2 &isdst $1 ]
|0000
( program )
@seed [ &x $1 &w $2 &s $2 ]
|0100 ( -> )
( theme )
#2aac .System/r DEO2
#269b .System/g DEO2
#378d .System/b DEO2
;seed-line JSR2
( run for a few generations )
#00 #ff
&loop
OVR #00 SWP ;print-line JSR2
;compute-next JSR2
;copy-next JSR2
( incr ) INCR
( loop ) LTHk ,&loop JCN
POP2
BRK
@print-line ( y -- )
( set ) .Screen/y DEO2
( loop through cells )
#00 #ff
&loop
( copy ) OVR #00 SWP DUP2
( pos ) .Screen/x DEO2
( addr ) CELL ADD2
( draw ) LDA .Screen/color DEO
( incr ) INCR
( loop ) LTHk ,&loop JCN
POP2
RTN
@compute-next ( -- )
( loop through 62 cells )
#01 #fe
&loop
OVR DUP DUP ( three copies of the counter )
#01 SUB #00 SWP CELL ADD2 LDA
SWP
#01 ADD #00 SWP CELL ADD2 LDA
( the cell dies if the neighbors are either both dead or both alive, i.e. Rule 90 )
NEQ
( one copy of the counter and the life value )
SWP #00 SWP NEXT ADD2 STA
( incr ) INCR
( loop ) LTHk ,&loop JCN
POP2
RTN
@copy-next ( -- )
( loop through cells )
#00 #ff
&loop
OVR DUP ( two copies of the counter )
#00 SWP NEXT ADD2 LDA ( one copy of the counter and the value )
SWP #00 SWP CELL ADD2 STA
( incr ) INCR
( loop ) LTHk ,&loop JCN
POP2
RTN
@seed-line ( -- )
.DateTime/second DEI .seed/x STZ
#0000 .seed/w STZ2
#e2a9 .seed/s STZ2
( loop through cells )
#01 #fe
&loop
OVR ( one copy of the counter )
;rand JSR2
#10 AND ( pick a bit )
SWP #00 SWP CELL ADD2 STA
( incr ) INCR
( loop ) LTHk ,&loop JCN
POP2
RTN
( https://en.wikipedia.org/wiki/Middle-square_method )
@rand ( -- 1 )
.seed/x LDZ #00 SWP DUP2 MUL2
.seed/w LDZ2 .seed/s LDZ2 ADD2
DUP2 .seed/w STZ2
ADD2
#04 SFT SWP #40 SFT ADD
DUP .seed/x STZ
RTN