159 lines
4.3 KiB
Tal
159 lines
4.3 KiB
Tal
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( isometric cube )
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%+ { ADD } %- { SUB } %* { MUL } %/ { DIV }
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%< { LTH } %> { GTH } %= { EQU } %! { NEQ }
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%++ { ADD2 } %-- { SUB2 } %** { MUL2 } %// { DIV2 }
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%<< { LTH2 } %>> { GTH2 } %== { EQU2 } %!! { NEQ2 }
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%2* { #10 SFT } %2/ { #01 SFT } %2** { #10 SFT2 } %2// { #01 SFT2 }
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%4* { #20 SFT } %4/ { #02 SFT } %4** { #20 SFT2 } %4// { #02 SFT2 }
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%8* { #30 SFT } %8/ { #03 SFT } %8** { #30 SFT2 } %8// { #03 SFT2 }
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%10* { #40 SFT } %10/ { #04 SFT } %10** { #40 SFT2 } %10// { #04 SFT2 }
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%20* { #50 SFT } %20/ { #05 SFT } %20** { #50 SFT2 } %20// { #05 SFT2 }
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%ABS2 { DUP2 #0f SFT2 EQU #05 JCN #0000 SWP2 SUB2 }
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%LTS2 { #8000 ADD2 SWP2 #8000 ADD2 GTH2 }
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%GTS2 { #8000 ADD2 SWP2 #8000 ADD2 LTH2 }
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%DEBUG { ;print-hex/byte JSR2 #0a18 DEO }
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%DEBUG2 { ;print-hex JSR2 #0a18 DEO }
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%RTN { JMP2r }
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( devices )
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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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( variables )
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|0000
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@cube
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&v0 $8
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&v4 $8
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@timer $1
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@color $1
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@line
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&x0 $2 &y0 $2
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&x $2 &y $2
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&sx $2 &sy $2
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&dx $2 &dy $2
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&e1 $2 &e2 $2
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@center
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&x $2 &y $2
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( program )
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|0100 ( -> )
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( theme )
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#0fe5 .System/r DEO2
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#0fc5 .System/g DEO2
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#0f25 .System/b DEO2
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.Screen/width DEI2 2// #0040 -- .center/x STZ2
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.Screen/height DEI2 2// #0040 -- .center/y STZ2
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;on-frame .Screen/vector DEO2
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@on-frame ( -> )
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#00 ;draw-cube JSR2
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.timer LDZk INC SWP STZ
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#05 ;draw-cube JSR2
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BRK
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@draw-cube ( frame color -- )
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.color STZ
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( create box )
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#0800
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&loop
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STHk
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#00 .timer LDZ [ #00 STHkr INC #07 AND #60 SFT ++ ] #00ff AND2 ;table ++ LDA 2/
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#00 .timer LDZ [ #00 STHkr #60 SFT ++ ] #00ff AND2 ;table ++ LDA 4/ [ #00 STHkr #62 SFT2 ++ ]
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.cube/v0 STHr 2* + STZ2
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INC GTHk ,&loop JCN
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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 2* .cube + LDZ2 ;draw-vertex JSR2
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INC GTHk ,&ver-loop JCN
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POP2
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( lines )
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#0400
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&line-loop
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STHk
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.cube/v0 STHkr 2* + .cube/v0 STHkr INC #03 AND 2* + ;draw-line JSR2
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.cube/v0 STHkr 2* + .cube/v4 STHkr 2* + ;draw-line JSR2
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.cube/v4 STHkr 2* + .cube/v4 STHr INC #03 AND 2* + ;draw-line JSR2
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INC GTHk ,&line-loop JCN
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POP2
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RTN
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@draw-line ( a b -- )
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STH STH
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#00 STHkr LDZ .center/x LDZ2 ++ #00 STHr INC LDZ .center/y LDZ2 ++
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#00 STHkr LDZ .center/x LDZ2 ++ #00 STHr INC LDZ .center/y LDZ2 ++
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.color LDZ ;line-slow JSR2
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RTN
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@draw-vertex ( x y -- )
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#00 SWP #0004 -- .center/y LDZ2 ++ .Screen/y DEO2
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#00 SWP #0003 -- .center/x LDZ2 ++ .Screen/x DEO2
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;&icn .Screen/addr DEO2
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.color LDZ 2* .Screen/sprite DEO
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RTN
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&icn 0000 387c 7c7c 3800
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@line-slow ( x1 y1 x2 y2 color -- )
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( load ) .color STZ #0001 SUB2 .line/y0 STZ2 #0001 SUB2 .line/x0 STZ2 .line/y STZ2 .line/x STZ2
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.line/x0 LDZ2 .line/x LDZ2 SUB2 ABS2 .line/dx STZ2
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.line/y0 LDZ2 .line/y LDZ2 SUB2 ABS2 #0000 SWP2 SUB2 .line/dy STZ2
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#ffff #00 .line/x LDZ2 .line/x0 LDZ2 LTS2 2** ADD2 .line/sx STZ2
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#ffff #00 .line/y LDZ2 .line/y0 LDZ2 LTS2 2** ADD2 .line/sy STZ2
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.line/dx LDZ2 .line/dy LDZ2 ADD2 .line/e1 STZ2
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&loop
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.line/x LDZ2 .Screen/x DEO2 .line/y LDZ2 .Screen/y DEO2 .color LDZ .Screen/pixel DEO
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.line/x LDZ2 .line/x0 LDZ2 EQU2 .line/y LDZ2 .line/y0 LDZ2 EQU2 #0101 EQU2 ,&end JCN
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.line/e1 LDZ2 2** .line/e2 STZ2
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.line/e2 LDZ2 .line/dy LDZ2 LTS2 ,&skipy JCN
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.line/e1 LDZ2 .line/dy LDZ2 ADD2 .line/e1 STZ2
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.line/x LDZ2 .line/sx LDZ2 ADD2 .line/x STZ2
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&skipy
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.line/e2 LDZ2 .line/dx LDZ2 GTS2 ,&skipx JCN
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.line/e1 LDZ2 .line/dx LDZ2 ADD2 .line/e1 STZ2
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.line/y LDZ2 .line/sy LDZ2 ADD2 .line/y STZ2
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&skipx
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;&loop JMP2
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&end
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RTN
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@table ( 256 xy )
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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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