Browse code
(hilbert.tal) Added Hilbert demo
Devine Lu Linvega authored on 13/03/2023 05:10:28
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+|00 @System &vector $2 &wst $1 &rst $1 &eaddr $2 &ecode $1 &pad $1 &r $2 &g $2 &b $2 &debug $1 &halt $1 |
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+|20 @Screen &vector $2 &width $2 &height $2 &auto $1 &pad $1 &x $2 &y $2 &addr $2 &pixel $1 &sprite $1 |
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+ |
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+|00 |
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+ |
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+ @line &x2 $2 &y2 $2 |
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+ |
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+|0100 |
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+ |
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+ #aff5 .System/r DEO2 |
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+ #af00 .System/g DEO2 |
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+ #af05 .System/b DEO2 |
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+ ( screen size ) |
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+ #0140 .Screen/width DEO2 |
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+ #0140 .Screen/height DEO2 |
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+ |
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+ #03ff #0000 |
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+ &l |
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+ STH2k INC2k d2xy STH2r d2xy #01 draw-line |
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+ INC2 GTH2k ?&l |
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+ POP2 POP2 |
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+ |
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+BRK |
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+ |
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+@d2xy ( d* -- x* y* ) |
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+ |
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+ ,&t STR2 |
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+ #0000 |
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+ DUP2 ,&x STR2 |
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+ ,&y STR2 |
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+ |
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+ ( N ) #0020 #0001 ( for i=1; i<n; i*=2 ) |
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+ &l |
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+ STH2k |
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+ [ LIT2 &t $2 ] |
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+ DUP2 #01 SFT2 #0001 AND2 |
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+ DUP2 ,&rx STR2 |
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+ EOR2 #0001 AND2 ,&ry STR2 |
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+ ,&t LDR2 #02 SFT2 ,&t STR2 |
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+ [ LIT2 &x $2 ] [ LIT2 &y $2 ] [ LIT2 &rx $2 ] [ LIT2 &ry $2 ] |
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+ STH2r rot ,&y STR2 ,&x STR2 |
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+ DUP2 ,&rx LDR2 MUL2 ,&x LDR2 ADD2 ,&x STR2 |
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+ DUP2 ,&ry LDR2 MUL2 ,&y LDR2 ADD2 ,&y STR2 |
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+ #10 SFT2 GTH2k ?&l |
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+ POP2 POP2 |
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+ ,&x LDR2 #30 SFT2 #0020 ADD2 |
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+ ,&y LDR2 #30 SFT2 #0020 ADD2 |
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+ |
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+JMP2r |
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+ |
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+@rot ( x* y* rx* ry* n* -- x* y* ) |
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+ |
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+ ( n-1 ) #0001 SUB2 STH2 |
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+ SWP2 ,&rx STR2 |
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+ #0000 NEQ2 ?&skipy |
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+ [ LIT2 &rx $2 ] #0001 NEQ2 ?&skipx |
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+ ( rx-n-1 ) SWP2 STH2kr SWP2 SUB2 |
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+ ( ry-n-1 ) SWP2 STH2kr SWP2 SUB2 |
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+ &skipx |
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+ ( swap ) SWP2 |
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+ &skipy |
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+ POP2r |
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+ |
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+JMP2r |
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+ |
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+@draw-line ( x1* y1* x2* y2* color -- ) |
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+ |
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+ ( load ) |
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+ ,&color STR |
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+ ,&y STR2 |
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+ ,&x STR2 |
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+ .line/y2 STZ2 |
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+ .line/x2 STZ2 |
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+ |
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+ ,&x LDR2 .line/x2 LDZ2 SUB2 abs2 ,&dx STR2 |
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+ #0000 ,&y LDR2 .line/y2 LDZ2 SUB2 abs2 SUB2 ,&dy STR2 |
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+ |
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+ #ffff #00 .line/x2 LDZ2 ,&x LDR2 lts2 DUP2 ADD2 ADD2 ,&sx STR2 |
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+ #ffff #00 .line/y2 LDZ2 ,&y LDR2 lts2 DUP2 ADD2 ADD2 ,&sy STR2 |
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+ |
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+ [ LIT2 &dx $2 ] [ LIT2 &dy $2 ] ADD2 ,&e1 STR2 |
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+ |
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+ &loop |
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+ .line/x2 LDZ2 DUP2 .Screen/x DEO2 [ LIT2 &x $2 ] EQU2 |
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+ .line/y2 LDZ2 DUP2 .Screen/y DEO2 [ LIT2 &y $2 ] EQU2 |
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+ [ LIT2 &color $1 -Screen/pixel ] DEO |
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+ AND ?&end |
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+ [ LIT2 &e1 $2 ] DUP2 ADD2 DUP2 |
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+ ,&dy LDR2 lts2 ?&skipy |
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+ ,&e1 LDR2 ,&dy LDR2 ADD2 ,&e1 STR2 |
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+ .line/x2 LDZ2 [ LIT2 &sx $2 ] ADD2 .line/x2 STZ2 |
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+ &skipy |
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+ ,&dx LDR2 gts2 ?&skipx |
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+ ,&e1 LDR2 ,&dx LDR2 ADD2 ,&e1 STR2 |
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+ .line/y2 LDZ2 [ LIT2 &sy $2 ] ADD2 .line/y2 STZ2 |
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+ &skipx |
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+ !&loop |
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+ &end |
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+ |
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+JMP2r |
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+ |
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+@abs2 DUP2 #0f SFT2 EQU #05 JCN #0000 SWP2 SUB2 JMP2r |
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+@lts2 #8000 STH2k ADD2 SWP2 STH2r ADD2 GTH2 JMP2r |
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+@gts2 #8000 STH2k ADD2 SWP2 STH2r ADD2 LTH2 JMP2r |
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+ |