91 lines
1.3 KiB
Tal
91 lines
1.3 KiB
Tal
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|00 @System &vector $2 &pad $6 &r $2 &g $2 &b $2
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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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|0000
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@f $2
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|0100
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#ff0f .System/r DEO2
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#f0a0 .System/g DEO2
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#f020 .System/b DEO2
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( size )
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#0100 .Screen/width DEO2
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#0080 .Screen/height DEO2
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( animate )
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;on-frame .Screen/vector DEO2
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BRK
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@print ( short* -- )
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SWP ,&byte JSR
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&byte ( byte -- ) DUP #04 SFT ,&char JSR
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&char ( char -- ) #0f AND DUP #09 GTH #27 MUL ADD #30 ADD #18 DEO
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JMP2r
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@on-frame ( -> )
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.Screen/height DEI2 #0000
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&v
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STH2k
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DUP2 .Screen/y DEO2
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.Screen/width DEI2 #0000
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&h
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DUP2 .Screen/x DEO2
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INC2k STH2kr INC2
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;pixel JSR2
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INC2 GTH2k ,&h JCN
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POP2 POP2 POP2r
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INC2 GTH2k ,&v JCN
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POP2 POP2
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.f LDZ2k INC2 ROT STZ2
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BRK
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@pixel ( x* y* -- )
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OVR2 OVR2 ;get-quad JSR2 STH
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SWP2
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.Screen/width DEI2 #01 SFT2 GTH2k JMP SWP2 SUB2
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SWP2
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.Screen/height DEI2 #01 SFT2 GTH2k JMP SWP2 SUB2
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SWP2 #007f AND2 SWP2
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#0080 MUL2 ADD2 #1fff AND2
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;atan2 ADD2 LDA
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( ring )
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DUP #0f AND .f LDZ2 #01 SFT2 NIP #0f AND EQU STH
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#04 SFT
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( cadran )
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STHr ORA
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STHr EOR
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.Screen/pixel DEO
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JMP2r
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@get-quad ( x* y* -- quad )
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.Screen/height DEI2 #01 SFT2 GTH2 #10 SFT STH
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.Screen/width DEI2 #01 SFT2 GTH2 STHr ORA
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JMP2r
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@atan2 ~lut5.tal
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