uxn/projects/examples/demos/dvd.tal

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Tal
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( DVD Bounce )
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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
|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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|0000
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@dvd &x $2 &y $2 &dx $1 &dy $1
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|0100 ( -> )
( theme )
#4cfd .System/r DEO2
#4cf3 .System/g DEO2
#dcf2 .System/b DEO2
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( vectors )
;on-frame .Screen/vector DEO2
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( starting position )
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.Screen/width DEI2 #01 SFT2 .dvd/x STZ2
.Screen/height DEI2 #01 SFT2 .dvd/y STZ2
#36 .Screen/auto DEO
#01 ,draw-dvd JSR
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BRK
@on-frame ( -> )
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#00 ,draw-dvd JSR
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( case: hit-right ) .dvd/x LDZ2 .Screen/width DEI2 #0020 SUB2 EQU2
( case: hit-left ) .dvd/x LDZ2 #0000 EQU2
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#0000 EQU2 ,&no-flipx JCN
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.dvd/dx LDZk #00 EQU SWP STZ
&no-flipx
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( case: hit-bottom ) .dvd/y LDZ2 .Screen/height DEI2 #0010 SUB2 EQU2
( case: hit-top ) .dvd/y LDZ2 #0000 EQU2
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#0000 EQU2 ,&no-flipy JCN
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.dvd/dy LDZk #00 EQU SWP STZ
&no-flipy
( incr ) .dvd/x LDZ2 #0001 #00 .dvd/dx LDZ #00 EQU DUP2 ADD2 SUB2 ADD2 .dvd/x STZ2
( incr ) .dvd/y LDZ2 #0001 #00 .dvd/dy LDZ #00 EQU DUP2 ADD2 SUB2 ADD2 .dvd/y STZ2
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#01 ,draw-dvd JSR
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BRK
@draw-dvd ( color -- )
;dvd_icn .Screen/addr DEO2
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.dvd/x LDZ2 .Screen/x DEO2
.dvd/y LDZ2 .Screen/y DEO2
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.Screen/sprite DEOk DEO
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JMP2r
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@dvd_icn ( 4 x 2 )
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001f 3f38 3838 787f 00fe fe7e 7777 e3c3
000f 1f3b 7b77 e7c7 00fc fe8f 8707 0efc
7f00 000f ff7f 0700 0301 00ff f0f8 ff00
8700 00ff 7f7f ff00 f000 00e0 fcfc 8000