74 lines
1.6 KiB
Tal
74 lines
1.6 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
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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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|0100
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@on-reset ( -> )
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( | theme )
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#6f04 .System/r DEO2
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#7f00 .System/g DEO2
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#8f00 .System/b DEO2
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( | screen size )
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#00c0
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( ) DUP2 .Screen/width DEO2
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( ) .Screen/height DEO2
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( | pen )
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#0020
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( ) DUP2 .Screen/x DEO2
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( ) .Screen/y DEO2
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( | vector )
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;on-frame .Screen/vector DEO2
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BRK
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@on-frame ( -> )
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[ LIT2 &f $2 ] INC2 DUP2 ,&f STR2
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( | end )
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DUP2 #0400 LTH2 ?{
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POP2 #0000 .Screen/vector DEO2
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BRK }
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d2xy
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( | draw line )
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.Screen/y DEI2 diff ,&y STR2
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.Screen/x DEI2 diff ,&x STR2
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#0400
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&l ( -- )
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.Screen/x DEI2k [ LIT2 &x $2 ] ADD2 ROT DEO2
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.Screen/y DEI2k [ LIT2 &y $2 ] ADD2 ROT DEO2
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[ LIT2 01 -Screen/pixel ] DEO
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INC GTHk ?&l
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POP2 BRK
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@diff ( a* b* -- dir* )
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EQU2k ?{
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LTH2 ?{ #0001 JMP2r }
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#ffff JMP2r }
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POP2 POP2 #0000 JMP2r
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@d2xy ( d* -- x* y* )
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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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#2001
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&l ( -- )
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#00 OVR STH2
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[ LIT2 &t $2 ] DUP2 #02 SFT2 ,&t STR2
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( ) DUP2 #01 SFT2 #0001 AND2 DUP2 ,&rx STR2
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( ) EOR2 #0001 AND2 ,&ry STR2
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[ LIT2 &x $2 ] [ LIT2 &y $2 ] [ LIT2 &ry $2 ]
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( ) DUP2r [ LIT2r 0001 ] SUB2r
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( | rot )
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ORA ?{
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[ LIT2 &rx $2 ] #0001 NEQ2 ?{
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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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( swap ) SWP2 }
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POP2r
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( ) STH2kr ,&ry LDR2 MUL2 ADD2 ,&y STR2
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( ) STH2r ,&rx LDR2 MUL2 ADD2 ,&x STR2
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DUP ADD GTHk ?&l
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POP2
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( ) ,&x LDR2 #20 SFT2 #0020 ADD2
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( ) ,&y LDR2 #20 SFT2 #0020 ADD2 JMP2r
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