mirror of
https://git.sr.ht/~rabbits/uxn
synced 2024-11-05 22:05:04 +00:00
105 lines
2.2 KiB
Tal
105 lines
2.2 KiB
Tal
|00 @System &vector $2 &wst $1 &rst $1 &eaddr $2 &ecode $1 &pad $1 &r $2 &g $2 &b $2 &debug $1 &halt $1
|
|
|20 @Screen &vector $2 &width $2 &height $2 &auto $1 &pad $1 &x $2 &y $2 &addr $2 &pixel $1 &sprite $1
|
|
|
|
|00
|
|
|
|
@line &x2 $2 &y2 $2
|
|
|
|
|0100
|
|
|
|
#aff5 .System/r DEO2
|
|
#af00 .System/g DEO2
|
|
#af05 .System/b DEO2
|
|
( screen size )
|
|
#0140 .Screen/width DEO2
|
|
#0140 .Screen/height DEO2
|
|
|
|
#03ff #0000
|
|
&l
|
|
STH2k INC2k d2xy STH2r d2xy #01 draw-line
|
|
INC2 GTH2k ?&l
|
|
POP2 POP2
|
|
|
|
BRK
|
|
|
|
@d2xy ( d* -- x* y* )
|
|
|
|
,&t STR2
|
|
#0000
|
|
DUP2 ,&x STR2
|
|
,&y STR2
|
|
|
|
( N ) #0020 #0001 ( for i=1; i<n; i*=2 )
|
|
&l
|
|
STH2k
|
|
[ LIT2 &t $2 ]
|
|
DUP2 #01 SFT2 #0001 AND2
|
|
DUP2 ,&rx STR2
|
|
EOR2 #0001 AND2 ,&ry STR2
|
|
,&t LDR2 #02 SFT2 ,&t STR2
|
|
[ LIT2 &x $2 ] [ LIT2 &y $2 ] [ LIT2 &rx $2 ] [ LIT2 &ry $2 ]
|
|
STH2r rot ,&y STR2 ,&x STR2
|
|
DUP2 ,&rx LDR2 MUL2 ,&x LDR2 ADD2 ,&x STR2
|
|
DUP2 ,&ry LDR2 MUL2 ,&y LDR2 ADD2 ,&y STR2
|
|
#10 SFT2 GTH2k ?&l
|
|
POP2 POP2
|
|
,&x LDR2 #30 SFT2 #0020 ADD2
|
|
,&y LDR2 #30 SFT2 #0020 ADD2
|
|
|
|
JMP2r
|
|
|
|
@rot ( x* y* rx* ry* n* -- x* y* )
|
|
|
|
( n-1 ) #0001 SUB2 STH2
|
|
SWP2 ,&rx STR2
|
|
#0000 NEQ2 ?&skipy
|
|
[ LIT2 &rx $2 ] #0001 NEQ2 ?&skipx
|
|
( rx-n-1 ) SWP2 STH2kr SWP2 SUB2
|
|
( ry-n-1 ) SWP2 STH2kr SWP2 SUB2
|
|
&skipx
|
|
( swap ) SWP2
|
|
&skipy
|
|
POP2r
|
|
|
|
JMP2r
|
|
|
|
@draw-line ( x1* y1* x2* y2* color -- )
|
|
|
|
( load )
|
|
,&color STR
|
|
,&y STR2
|
|
,&x STR2
|
|
.line/y2 STZ2
|
|
.line/x2 STZ2
|
|
|
|
,&x LDR2 .line/x2 LDZ2 SUB2 abs2 ,&dx STR2
|
|
#0000 ,&y LDR2 .line/y2 LDZ2 SUB2 abs2 SUB2 ,&dy STR2
|
|
|
|
#ffff #00 .line/x2 LDZ2 ,&x LDR2 lts2 DUP2 ADD2 ADD2 ,&sx STR2
|
|
#ffff #00 .line/y2 LDZ2 ,&y LDR2 lts2 DUP2 ADD2 ADD2 ,&sy STR2
|
|
|
|
[ LIT2 &dx $2 ] [ LIT2 &dy $2 ] ADD2 ,&e1 STR2
|
|
|
|
&loop
|
|
.line/x2 LDZ2 DUP2 .Screen/x DEO2 [ LIT2 &x $2 ] EQU2
|
|
.line/y2 LDZ2 DUP2 .Screen/y DEO2 [ LIT2 &y $2 ] EQU2
|
|
[ LIT2 &color $1 -Screen/pixel ] DEO
|
|
AND ?&end
|
|
[ LIT2 &e1 $2 ] DUP2 ADD2 DUP2
|
|
,&dy LDR2 lts2 ?&skipy
|
|
,&e1 LDR2 ,&dy LDR2 ADD2 ,&e1 STR2
|
|
.line/x2 LDZ2 [ LIT2 &sx $2 ] ADD2 .line/x2 STZ2
|
|
&skipy
|
|
,&dx LDR2 gts2 ?&skipx
|
|
,&e1 LDR2 ,&dx LDR2 ADD2 ,&e1 STR2
|
|
.line/y2 LDZ2 [ LIT2 &sy $2 ] ADD2 .line/y2 STZ2
|
|
&skipx
|
|
!&loop
|
|
&end
|
|
|
|
JMP2r
|
|
|
|
@abs2 DUP2 #0f SFT2 EQU #05 JCN #0000 SWP2 SUB2 JMP2r
|
|
@lts2 #8000 STH2k ADD2 SWP2 STH2r ADD2 GTH2 JMP2r
|
|
@gts2 #8000 STH2k ADD2 SWP2 STH2r ADD2 LTH2 JMP2r
|
|
|