mirror of https://git.sr.ht/~rabbits/uxn
172 lines
4.0 KiB
Tal
172 lines
4.0 KiB
Tal
( uxnemu snake.rom )
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|00 @System &vector $2 &expansion $2 &wst $1 &rst $1 &metadata $2 &r $2 &g $2 &b $2 &debug $1 &state $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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|80 @Controller &vector $2 &button $1 &key $1
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|c0 @DateTime &year $2 &month $1 &day $1 &hour $1 &minute $1 &second $1 &dotw $1 &doty $2 &isdst $1
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|000
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@arena &w $1 &h $1
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@apple &pos &x $1 &y $1
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@snake &pos &x $1 &y $1 &direction $1 &length $1 &dead $1 &tail $40
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|100
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@on-reset ( -> )
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( | theme )
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#0f7e .System/r DEO2
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#0fe6 .System/g DEO2
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#0f62 .System/b DEO2
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( | vectors )
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;on-frame .Screen/vector DEO2
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;on-button .Controller/vector DEO2
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( | resize )
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#00c8 .Screen/width DEO2
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#0100 .Screen/height DEO2
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( | set arena )
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.Screen/width DEI2 #03 SFT2 .arena/w STZ
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POP .Screen/height DEI2 #03 SFT2 .arena/h STZ
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POP [ LIT2 01 -Screen/auto ] DEO
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reset BRK
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@on-frame ( -> )
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[ LIT &f $1 ] INCk ,&f STR
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#04 GTH ?{ BRK }
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[ LIT2 00 _&f ] STR
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#00 <draw-snake>
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<move>
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[ LIT2 02 -snake/dead ] LDZ ADD <draw-snake>
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#83 <draw-apple>
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<draw-score>
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BRK
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@on-button ( -> )
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.Controller/button DEI
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( ) DUP #f0 AND ?&arrow
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( ) #0f AND ?&button
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BRK
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&arrow ( button -> )
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#04 SFT .snake/direction STZ
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BRK
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&button ( -> )
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reset BRK
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@reset ( -- )
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#00 <draw-snake>
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#00 <draw-apple>
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[ LIT2 00 -snake/dead ] STZ
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[ LIT2 00 -snake/length ] STZ
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[ LIT2 00 -snake/direction ] STZ
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.arena/w LDZ #01 SFT #01 SUB .snake/x STZ
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.arena/h LDZ #01 SFT #01 SUB .snake/y STZ
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#03 <draw-snake>
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!<add-apple>
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@<move> ( -- )
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( | copy tail )
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[ LITr -snake/pos ] LDZ2r .snake/length LDZ #00
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&>loop ( -- )
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DUPk ADD .snake/tail ADD LDZ2k STH2
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SWP2r STH2r ROT STZ2
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INC GTHk ?&>loop
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POP2 POP2r
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( ) .snake/dead LDZ ?&end
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.snake/direction LDZ
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( ) DUP #01 NEQ ?{
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.snake/y LDZk #01 SUB .arena/h set-pos }
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DUP #02 NEQ ?{
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.snake/y LDZk INC .arena/h set-pos }
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DUP #04 NEQ ?{
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.snake/x LDZk #01 SUB .arena/w set-pos }
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DUP #08 NEQ ?{
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.snake/x LDZk INC .arena/w set-pos }
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POP
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( | detect collision with apple )
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.snake/pos LDZ2 .apple/pos LDZ2 NEQ2 ?{
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#00 <draw-apple>
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.snake/length LDZk INC SWP STZ
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<add-apple>
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!<move> }
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( | detect collision with body )
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.snake/length LDZ #01
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&>loop-body ( -- )
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DUPk ADD .snake/tail ADD LDZ2 .snake/pos LDZ2 NEQ2 ?{
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[ LIT2 01 -snake/dead ] STZ
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#03 <draw-snake> }
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INC GTHk ?&>loop-body
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POP2 &end JMP2r
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@set-pos ( z mod max -- )
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LDZ OVR INC ?{ ROT STZ
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POP JMP2r }
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DIVk MUL SUB SWP STZ
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JMP2r
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@<add-apple> ( -- )
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.DateTime/hour DEI2 .DateTime/minute DEI2 MUL2
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( ) DUP2 #1234 MUL2 ADD .arena/w LDZ DIVk MUL SUB .apple/x STZ
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( ) #abcd MUL2 ADD .arena/h LDZ DIVk MUL SUB .apple/y STZ
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JMP2r
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(
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@|drawing )
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@<draw-snake> ( color -- )
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STH
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( | draw tail )
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;snake-icns .Screen/addr DEO2
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[ LIT2 -snake/tail -snake/length ] LDZ DUP ADD OVR ADD SWP
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&>loop ( -- )
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LDZ2k #0005 SFT2 .Screen/y DEO2
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#0005 SFT2 .Screen/x DEO2
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DUPr [ LITr -Screen/sprite ] DEOr
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INC INC GTHk ?&>loop
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POP2
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( | draw head )
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.snake/pos LDZ2 #0005 SFT2 .Screen/y DEO2
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#0005 SFT2 .Screen/x DEO2
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;snake-icns/face .Screen/addr DEO2
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[ LITr -Screen/sprite ] DEOr
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JMP2r
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@<draw-apple> ( color -- )
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.apple/x LDZ #0005 SFT2 .Screen/x DEO2
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.apple/y LDZ #0005 SFT2 .Screen/y DEO2
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STHk ;apple-chr ;fill-icn [ LITr 01 JCNr SWP2 POP2 ] .Screen/addr DEO2
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.Screen/sprite DEO
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JMP2r
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@<draw-score> ( -- )
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#0010 DUP2 .Screen/x DEO2
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.Screen/y DEO2
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.snake/length LDZ
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( x0 ) DUP #04 SFT <draw-num>
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( >> )
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@<draw-num> ( num -- )
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#000f ROT AND #30 SFT2 ;font-hex ADD2 .Screen/addr DEO2
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[ LIT2 41 -Screen/sprite ] DEO
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JMP2r
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(
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@|assets )
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@snake-icns [ 7eff ffff ffff ff7e ]
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&face [ 7eff ffdb ffe7 ff7e ]
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@apple-chr [
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0000 76ff ffff 7e3c 1008 0000 0000 0000 ]
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@fill-icn [ ffff ffff ffff ffff ]
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@font-hex [
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007c 8282 8282 827c 0030 1010 1010 1010
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007c 8202 7c80 80fe 007c 8202 1c02 827c
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000c 1424 4484 fe04 00fe 8080 7c02 827c
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007c 8280 fc82 827c 007c 8202 1e02 0202
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007c 8282 7c82 827c 007c 8282 7e02 827c
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007c 8202 7e82 827e 00fc 8282 fc82 82fc
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007c 8280 8080 827c 00fc 8282 8282 82fc
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007c 8280 f080 827c 007c 8280 f080 8080 ]
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