mirror of
https://git.sr.ht/~rabbits/uxn
synced 2024-11-26 07:45:14 +00:00
124 lines
3.5 KiB
Tal
124 lines
3.5 KiB
Tal
( Cube3d: Just a cube, y'know )
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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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|0000
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@timer $1
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@cube &v0 $8 &v4 $8
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@center &x $2 &y $2
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|0100
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@on-reset ( -> )
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( | theme )
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#4fcd .System/r DEO2
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#4fc3 .System/g DEO2
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#dfc2 .System/b DEO2
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( | center )
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.Screen/width DEI2 #01 SFT2 #0040 SUB2 .center/x STZ2
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.Screen/height DEI2 #01 SFT2 #0040 SUB2 .center/y STZ2
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( | begin. )
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;on-frame .Screen/vector DEO2
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@on-frame ( -> )
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( | clear )
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#0000 DUP2 .Screen/x DEO2
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.Screen/y DEO2
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[ LIT2 80 -Screen/pixel ] DEO
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( | draw )
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.timer LDZk INC SWP STZ
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<draw-cube>
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BRK
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@<draw-cube> ( frame -- )
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( | create box )
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#0800
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&loop ( -- )
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STHk [ LIT2 00 -timer ] LDZ #00 STHkr INC #07 AND #60 SFT ADD2 #00ff AND2 ;table ADD2 LDA #01 SFT #00 .timer LDZ #00 STHkr #60 SFT ADD2 #00ff AND2 ;table ADD2 LDA #02 SFT #00 STHkr #62 SFT2 ADD2 .cube/v0 STHr DUP ADD ADD STZ2
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INC GTHk ?&loop
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POP2
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( | vertices )
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#0800
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&ver-loop ( -- )
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DUP DUP ADD .cube ADD LDZ2 <draw-vertex>
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INC GTHk ?&ver-loop
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POP2
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( lines ) #0400
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&line-loop ( -- )
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STHk .cube/v0 STHkr DUP ADD ADD .cube/v0 STHkr INC #03 AND DUP ADD ADD <draw-edge>
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.cube/v0 STHkr DUP ADD ADD .cube/v4 STHkr DUP ADD ADD <draw-edge>
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.cube/v4 STHkr DUP ADD ADD .cube/v4 STHr INC #03 AND DUP ADD ADD <draw-edge>
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INC GTHk ?&line-loop
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POP2 JMP2r
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@<draw-edge> ( a b -- )
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STH STH
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( ) #00 STHkr LDZ .center/x LDZ2 ADD2
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( ) #00 STHr INC LDZ .center/y LDZ2 ADD2
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( ) #00 STHkr LDZ .center/x LDZ2 ADD2
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( ) #00 STHr INC LDZ .center/y LDZ2 ADD2 #05 <draw-line>
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JMP2r
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@<draw-vertex> ( x y -- )
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#00 SWP #0004 SUB2 .center/y LDZ2 ADD2 .Screen/y DEO2
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#00 SWP #0003 SUB2 .center/x LDZ2 ADD2 .Screen/x DEO2
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;&icn .Screen/addr DEO2
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[ LIT2 05 -Screen/sprite ] DEO
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JMP2r
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&icn [ 0000 387c 7c7c 3800 ]
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@<draw-line> ( x1* y1* x2* y2* color -- )
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,&color STR
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,&y STR2
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,&x STR2
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,&y2 STR2
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,&x2 STR2
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,&x LDR2 ,&x2 LDR2 SUB2 abs2 ,&dx STR2
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#0000 ,&y LDR2 ,&y2 LDR2 SUB2 abs2 SUB2 ,&dy STR2
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#ffff [ LIT2 00 _&x2 ] LDR2 ,&x LDR2 lts2 DUP2 ADD2 ADD2 ,&sx STR2
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#ffff [ LIT2 00 _&y2 ] LDR2 ,&y LDR2 lts2 DUP2 ADD2 ADD2 ,&sy STR2
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[ LIT2 &dx $2 ] [ LIT2 &dy $2 ] ADD2 STH2
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&while ( -- )
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[ LIT2 &x2 $2 ] DUP2 .Screen/x DEO2
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[ LIT2 &x $2 ] EQU2 [ LIT2 &y2 $2 ] DUP2 .Screen/y DEO2
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[ LIT2 &y $2 ] EQU2 [ LIT2 &color $1 -Screen/pixel ] DEO
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AND ?&end
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STH2kr DUP2 ADD2 DUP2 ,&dy LDR2 lts2 ?&skipy
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STH2r ,&dy LDR2 ADD2 STH2 ,&x2 LDR2 [ LIT2 &sx $2 ] ADD2 ,&x2 STR2
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&skipy ( -- )
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,&dx LDR2 gts2 ?&while
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STH2r ,&dx LDR2 ADD2 STH2 ,&y2 LDR2 [ LIT2 &sy $2 ] ADD2 ,&y2 STR2
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!&while
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&end POP2r JMP2r
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@abs2 ( a* -- f )
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DUP2 #0f SFT2 EQU ?{ #0000 SWP2 SUB2 }
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JMP2r
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@lts2 ( a* b* -- f )
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#8000 STH2k ADD2 SWP2 STH2r ADD2 GTH2 JMP2r
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@gts2 ( a* b* -- f )
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#8000 STH2k ADD2 SWP2 STH2r ADD2 LTH2 JMP2r
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@table ( 256 xy )
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[
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f7f8 f9fa fbfc fcfd fefe ffff ffff ffff
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ffff ffff fffe fefd fcfc fbfa f9f8 f7f6
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f5f3 f2f0 efed ecea e8e6 e4e2 e0de dcda
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d8d5 d3d1 cecc c9c7 c4c1 bfbc b9b6 b3b0
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aeab a8a5 a29f 9c98 9592 8f8c 8986 8380
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7c79 7673 706d 6a67 6360 5d5a 5754 514f
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4c49 4643 403e 3b38 3633 312e 2c2a 2725
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2321 1f1d 1b19 1715 1312 100f 0d0c 0a09
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0807 0605 0403 0302 0101 0000 0000 0000
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0000 0000 0001 0102 0303 0405 0607 0809
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0a0c 0d0f 1012 1315 1719 1b1d 1f21 2325
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272a 2c2e 3133 3638 3b3e 4043 4649 4c4f
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5154 575a 5d60 6367 6a6d 7073 7679 7c7f
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8386 898c 8f92 9598 9c9f a2a5 a8ab aeb0
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b3b6 b9bc bfc1 c4c7 c9cc ced1 d3d5 d8da
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dcde e0e2 e4e6 e8ea eced eff0 f2f3 f5f6 ]
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