uxn/projects/examples/demos/life.tal

( uxnemu life.rom )
	( Any live cell with fewer than two live neighbours dies, as if by underpopulation. )
	( Any live cell with two or three live neighbours lives on to the next generation. )
	( Any live cell with more than three live neighbours dies, as if by overpopulation. )
	( Any dead cell with exactly three live neighbours becomes a live cell, as if by reproduction. )

|00 @System &vector $2 &wst $1 &rst $1 &pad $4 &r $2 &g $2 &b $2
|10 @Console &vector $2 &read $1 &pad $5 &write $1 &error $1
|20 @Screen &vector $2 &width $2 &height $2 &auto $1 &pad $1 &x $2 &y $2 &addr $2 &pixel $1 &sprite $1
|30 @Audio0 &vector $2 &position $2 &output $1 &pad $3 &adsr $2 &length $2 &addr $2 &volume $1 &pitch $1
|80 @Controller &vector $2 &button $1 &key $1
|90 @Mouse &vector $2 &x $2 &y $2 &state $1 &wheel $1
|000

	@world &count $2
	@anchor &x $2 &y $2 &x2 $2 &y2 $2

|100

@on-reset ( -> )
	( | theme )
	#02cf .System/r DEO2
	#02ff .System/g DEO2
	#024f .System/b DEO2
	( | resize )
	#00c0 DUP2 .Screen/width DEO2
	.Screen/height DEO2
	( | vectors )
	;on-frame .Screen/vector DEO2
	;on-mouse .Mouse/vector DEO2
	;on-control .Controller/vector DEO2
	( | glider )
	#0703 <set-cell>
	#0704 <set-cell>
	#0504 <set-cell>
	#0705 <set-cell>
	#0605 <set-cell>
	( | center )
	.Screen/width DEI2 #01 SFT2 #0040 SUB2 DUP2 .anchor/x STZ2
	#007e ADD2 .anchor/x2 STZ2
	.Screen/height DEI2 #01 SFT2 #0040 SUB2 DUP2 .anchor/y STZ2
	#007e ADD2 .anchor/y2 STZ2
	BRK

@on-frame ( -> )
	.Mouse/state DEI #00 EQU ?{ BRK }
	#0000 .world/count STZ2
	[ LIT &f $1 ] INCk ,&f STR
	( ) #03 AND #00 EQU ?{ BRK }
	<run>
	&paused BRK

@on-mouse ( -> )
	[ LIT2 00 -Mouse/state ] DEI NEQ #42 ADD ;cursor-icn <update-cursor>
	( | on touch in rect )
	.Mouse/state DEI ?{ BRK }
	.Mouse/x DEI2 .Mouse/y DEI2 .anchor within-rect ?{ BRK }
	( | paint )
	.Mouse/x DEI2 .anchor/x LDZ2 SUB2 #01 SFT NIP
	( ) .Mouse/y DEI2 .anchor/y LDZ2 SUB2 #01 SFT NIP <set-cell>
	<draw-grid>
	BRK

@on-control ( -> )
	( | toggle play )
	.Controller/key DEI #20 NEQ ?{
		;on-frame #0000 .Screen/vector DEI2 EQU2k ?{ ROT2 }
		POP2 POP2 .Screen/vector DEO2 }
	.Controller/button DEI #08 NEQ ?{ ;bank1 #0400 mclr }
	BRK

(
@|core )

@<run> ( -- )
	( | clear buffer )
	;bank2 #1000 mclr
	( | <run> grid )
	#4000
	&ver ( -- )
		STHk #4000
	&hor ( -- )
		DUP STHkr <run-cell>
		INC GTHk ?&hor
	POP2 POPr INC GTHk ?&ver
	POP2
	( | move buffer )
	;bank2 ;bank1 #1000 mcpy
	( | draw )
	!<draw-grid>

@<run-cell> ( x y -- )
	( x y ) DUP2k
	( neighbours ) get-neighbours
	( state ) ROT ROT get-cell #00 EQU ?&dead
	DUP #02 LTH ?&dies
	DUP #03 GTH ?&dies
	POP !&save
	&dies POP POP2 JMP2r
	&dead ( -- )
		DUP #03 EQU ?&birth
		POP POP2 JMP2r
		&birth POP !&save
	&save ( x y -- )
		STH2
		#01 STH2r get-index #1000 ADD2 STA
		.world/count LDZ2 INC2 .world/count STZ2
		JMP2r

@get-index ( x y -- index* )
	( y ) #3f AND #00 SWP #60 SFT2
	( x ) ROT #3f AND #00 SWP ADD2 ;bank1 ADD2 JMP2r

@<set-cell> ( x y -- )
	STH2
	#01 STH2r get-index STA
	JMP2r

@get-cell ( x y -- cell )
	get-index LDA JMP2r

@get-neighbours ( x y -- neighbours )
	,&origin STR2
	LITr 00 #0800
	&loop ( -- )
		#00 OVRk ADD2 ;&mask ADD2 LDA2 [ LIT2 &origin $2 ] ROT ADD STH
		ADD STHr get-cell STH
		ADDr INC GTHk ?&loop
	POP2 STHr JMP2r
	&mask [
	ffff 00ff 01ff ff00 0100 ff01 0001 0101 ]

(
@|drawing )

@<draw-grid> ( -- )
	( draw cell count ) .anchor/x LDZ2 .Screen/x DEO2
	.anchor/y2 LDZ2 #0008 ADD2 .Screen/y DEO2
	#01 .Screen/auto DEO
	.world/count LDZ2 <draw-short>
	#00 .Screen/auto DEO
	#4000
	&ver ( -- )
		#00 OVRk ADD2 .anchor/y LDZ2 ADD2 .Screen/y DEO2
		STHk #4000
	&hor ( -- )
		#00 OVRk ADD2 .anchor/x LDZ2 ADD2 .Screen/x DEO2
		DUP STHkr get-cell INC .Screen/pixel DEO
		INC GTHk ?&hor
	POP2 POPr INC GTHk ?&ver
	POP2 JMP2r

@<draw-short> ( short* -- )
	SWP <draw-byte>

@<draw-byte> ( byte color -- )
	DUP #04 SFT <draw-hex>
	#0f AND

@<draw-hex> ( char color -- )
	#00 SWP #30 SFT2 ;font-hex ADD2 .Screen/addr DEO2
	[ LIT2 03 -Screen/sprite ] DEO
	JMP2r

@<update-cursor> ( color addr* -- )
	[ LIT2 00 -Screen/auto ] DEO
	;fill-icn .Screen/addr DEO2
	#40 <draw-cursor>
	.Mouse/x DEI2 ,<draw-cursor>/x STR2
	.Mouse/y DEI2 ,<draw-cursor>/y STR2
	.Screen/addr DEO2

@<draw-cursor> ( color -- )
	[ LIT2 &x $2 ] .Screen/x DEO2
	[ LIT2 &y $2 ] .Screen/y DEO2
	.Screen/sprite DEO
	JMP2r

@within-rect ( x* y* rect -- flag )
	STH
	( y < rect.y1 ) DUP2 STHkr INC INC LDZ2 LTH2 ?&skip
	( y > rect.y2 ) DUP2 STHkr #06 ADD LDZ2 GTH2 ?&skip
	SWP2
	( x < rect.x1 ) DUP2 STHkr LDZ2 LTH2 ?&skip
	( x > rect.x2 ) DUP2 STHkr #04 ADD LDZ2 GTH2 ?&skip
	POP2 POP2 POPr #01 JMP2r
	&skip POP2 POP2 POPr #00 JMP2r

(
@|stdlib )

@mclr ( addr* len* -- )
	OVR2 ADD2 SWP2
	&loop ( -- )
		STH2k #00 STH2r STA
		INC2 GTH2k ?&loop
	POP2 POP2 JMP2r

@mcpy ( src* dst* len* -- )
	SWP2 STH2
	OVR2 ADD2 SWP2
	&loop ( -- )
		LDAk STH2kr STA
		INC2r INC2 GTH2k ?&loop
	POP2 POP2 POP2r JMP2r

(
@|assets )

@cursor-icn [ 80c0 e0f0 f8e0 1000 ]

@fill-icn [ ffff ffff ffff ffff ]

@font-hex [
	7c82 8282 8282 7c00 3010 1010 1010 3800
	7c82 027c 8080 fe00 7c82 021c 0282 7c00
	2242 82fe 0202 0200 fe80 807c 0282 7c00
	7c82 80fc 8282 7c00 fe82 0408 0810 1000
	7c82 827c 8282 7c00 7c82 827e 0202 0200
	7c82 82fe 8282 8200 fc82 82fc 8282 fc00
	7c82 8080 8082 7c00 fc82 8282 8282 fc00
	fe80 80f0 8080 fe00 fe80 80f0 8080 8000 ]

(
@|memory )

@bank1 $1000

@bank2