Home » Archimedes archive » Acorn User » AU 1997-Xmas B.adf » Regulars » StarInfo/Vibe/ALIENGRASS

StarInfo/Vibe/ALIENGRASS

This website contains an archive of files for the Acorn Electron, BBC Micro, Acorn Archimedes, Commodore 16 and Commodore 64 computers, which Dominic Ford has rescued from his private collection of floppy disks and cassettes.

Some of these files were originally commercial releases in the 1980s and 1990s, but they are now widely available online. I assume that copyright over them is no longer being asserted. If you own the copyright and would like files to be removed, please contact me.

Tape/disk: Home » Archimedes archive » Acorn User » AU 1997-Xmas B.adf » Regulars
Filename: StarInfo/Vibe/ALIENGRASS
Read OK:
File size: 0577 bytes
Load address: 0000
Exec address: 0000
File contents
   10REM > ALIENGRASS  *** Jan Vibe march 97 ***
   20
   30MODE21:OFF
   40DIM SPR &3000,SC 16,PX%(50)
   50SPR!0=&2FFF:SPR!4=0:SPR!8=16:SPR!12=16
   60SC!00=256:SC!04=256:SC!08=256:SC!12=256
   70ONERRORGOTO510
   80
   90FORY%=0TO1024STEP2:PROCRGB(0,(255*(1024-Y%))/1024,255)
  100LINE0,Y%,1280,Y%:NEXT
  110SYS"OS_SpriteOp",256+15,SPR,"COL",0,128,16,21
  120FORN%=0TO40:PX%(N%)=32*N%+RND(33)-17:NEXT
  130FORN%=1TO500:SWAP PX%(RND(41)-1),PX%(RND(41)-1):NEXT:P%=-1
  140FORN%=1024TO200STEP-20:P%+=1:NF=N%/1024
  150REPEAT
  160R1%=RND(255):G1%=RND(255):B1%=RND(255)
  170UNTILR1%+G1%+B1%<=189
  180REPEAT
  190R2%=RND(255):G2%=RND(255):B2%=RND(255)
  200UNTILR2%+G2%+B2%>=510
  210SYS"OS_SpriteOp",256+60,SPR,"COL"
  220FORY%=0TO15STEP2:FORX%=0TO255STEP2
  230I1%=ABS(128-X%):I2%=128-I1%
  240R%=FNMIX(R1%,R2%,I1%,I2%):G%=FNMIX(G1%,G2%,I1%,I2%)
  250B%=FNMIX(B1%,B2%,I1%,I2%):PROCRGB(R%,G%,B%)
  260POINT X%,Y%:NEXT,
  270SYS"OS_SpriteOp",256+60,SPR,0
  280S=RND(1)*2*PI:D=RND(1)*.02+0.015:X%=PX%(P%):W=NF*N%/8:E=RND(1)*.75+.25
  290FORY%=0TON%STEP2
  300S=S+D:F=(1-Y%/N%):X1%=100*F*E*SINS+X%
  310SC!00=256*F*NF
  320SYS"OS_SpriteOp",256+60,SPR,"COL"
  330C%=RND(16)-1
  340SYS"OS_SpriteOp",256+16,SPR,"LINE",0,0,C%,255,C%
  350SYS"OS_SpriteOp",256+60,SPR,0
  360SYS"OS_SpriteOp",256+52,SPR,"LINE",X1%-W*F,Y%,0,SC
  370NEXT,
  380END
  390
  400DEFPROCRGB(R%,G%,B%)
  410LOCAL C%:C%=(R%<<8)+(G%<<16)+(B%<<24)
  420SYS "ColourTrans_SetGCOL",C%,,,&100,0
  430ENDPROC
  440
  450DEFFNMIX(C1%,C2%,I1%,I2%)
  460LOCAL C%
  470C%=(C1%*I1%+C2%*I2%)/(I1%+I2%)+RND(33)-17:IFC%>255 C%=255
  480IFC%<0 C%=0
  490=C%
  500
  510SYS"OS_SpriteOp",256+60,SPR,0:REPORT:PRINT" at line "STR$(ERL)

-� > ALIENGRASS  *** Jan Vibe march 97 ***

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�3ș"OS_SpriteOp",256+60,SPR,0:�:�" at line "�(�)
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00000000  0d 00 0a 2d f4 20 3e 20  41 4c 49 45 4e 47 52 41  |...-. > ALIENGRA|
00000010  53 53 20 20 2a 2a 2a 20  4a 61 6e 20 56 69 62 65  |SS  *** Jan Vibe|
00000020  20 6d 61 72 63 68 20 39  37 20 2a 2a 2a 0d 00 14  | march 97 ***...|
00000030  04 0d 00 1e 09 eb 32 31  3a 87 0d 00 28 1d de 20  |......21:...(.. |
00000040  53 50 52 20 26 33 30 30  30 2c 53 43 20 31 36 2c  |SPR &3000,SC 16,|
00000050  50 58 25 28 35 30 29 0d  00 32 2a 53 50 52 21 30  |PX%(50)..2*SPR!0|
00000060  3d 26 32 46 46 46 3a 53  50 52 21 34 3d 30 3a 53  |=&2FFF:SPR!4=0:S|
00000070  50 52 21 38 3d 31 36 3a  53 50 52 21 31 32 3d 31  |PR!8=16:SPR!12=1|
00000080  36 0d 00 3c 2b 53 43 21  30 30 3d 32 35 36 3a 53  |6..<+SC!00=256:S|
00000090  43 21 30 34 3d 32 35 36  3a 53 43 21 30 38 3d 32  |C!04=256:SC!08=2|
000000a0  35 36 3a 53 43 21 31 32  3d 32 35 36 0d 00 46 0b  |56:SC!12=256..F.|
000000b0  ee 85 e5 8d 64 7e 41 0d  00 50 04 0d 00 5a 31 e3  |....d~A..P...Z1.|
000000c0  59 25 3d 30 b8 31 30 32  34 88 32 3a f2 52 47 42  |Y%=0.1024.2:.RGB|
000000d0  28 30 2c 28 32 35 35 2a  28 31 30 32 34 2d 59 25  |(0,(255*(1024-Y%|
000000e0  29 29 2f 31 30 32 34 2c  32 35 35 29 0d 00 64 13  |))/1024,255)..d.|
000000f0  86 30 2c 59 25 2c 31 32  38 30 2c 59 25 3a ed 0d  |.0,Y%,1280,Y%:..|
00000100  00 6e 30 c8 99 22 4f 53  5f 53 70 72 69 74 65 4f  |.n0.."OS_SpriteO|
00000110  70 22 2c 32 35 36 2b 31  35 2c 53 50 52 2c 22 43  |p",256+15,SPR,"C|
00000120  4f 4c 22 2c 30 2c 31 32  38 2c 31 36 2c 32 31 0d  |OL",0,128,16,21.|
00000130  00 78 25 e3 4e 25 3d 30  b8 34 30 3a 50 58 25 28  |.x%.N%=0.40:PX%(|
00000140  4e 25 29 3d 33 32 2a 4e  25 2b b3 28 33 33 29 2d  |N%)=32*N%+.(33)-|
00000150  31 37 3a ed 0d 00 82 32  e3 4e 25 3d 31 b8 35 30  |17:....2.N%=1.50|
00000160  30 3a c8 94 20 50 58 25  28 b3 28 34 31 29 2d 31  |0:.. PX%(.(41)-1|
00000170  29 2c 50 58 25 28 b3 28  34 31 29 2d 31 29 3a ed  |),PX%(.(41)-1):.|
00000180  3a 50 25 3d 2d 31 0d 00  8c 25 e3 4e 25 3d 31 30  |:P%=-1...%.N%=10|
00000190  32 34 b8 32 30 30 88 2d  32 30 3a 50 25 2b 3d 31  |24.200.-20:P%+=1|
000001a0  3a 4e 46 3d 4e 25 2f 31  30 32 34 0d 00 96 05 f5  |:NF=N%/1024.....|
000001b0  0d 00 a0 24 52 31 25 3d  b3 28 32 35 35 29 3a 47  |...$R1%=.(255):G|
000001c0  31 25 3d b3 28 32 35 35  29 3a 42 31 25 3d b3 28  |1%=.(255):B1%=.(|
000001d0  32 35 35 29 0d 00 aa 15  fd 52 31 25 2b 47 31 25  |255).....R1%+G1%|
000001e0  2b 42 31 25 3c 3d 31 38  39 0d 00 b4 05 f5 0d 00  |+B1%<=189.......|
000001f0  be 24 52 32 25 3d b3 28  32 35 35 29 3a 47 32 25  |.$R2%=.(255):G2%|
00000200  3d b3 28 32 35 35 29 3a  42 32 25 3d b3 28 32 35  |=.(255):B2%=.(25|
00000210  35 29 0d 00 c8 15 fd 52  32 25 2b 47 32 25 2b 42  |5).....R2%+G2%+B|
00000220  32 25 3e 3d 35 31 30 0d  00 d2 24 c8 99 22 4f 53  |2%>=510...$.."OS|
00000230  5f 53 70 72 69 74 65 4f  70 22 2c 32 35 36 2b 36  |_SpriteOp",256+6|
00000240  30 2c 53 50 52 2c 22 43  4f 4c 22 0d 00 dc 1a e3  |0,SPR,"COL".....|
00000250  59 25 3d 30 b8 31 35 88  32 3a e3 58 25 3d 30 b8  |Y%=0.15.2:.X%=0.|
00000260  32 35 35 88 32 0d 00 e6  1d 49 31 25 3d 94 28 31  |255.2....I1%=.(1|
00000270  32 38 2d 58 25 29 3a 49  32 25 3d 31 32 38 2d 49  |28-X%):I2%=128-I|
00000280  31 25 0d 00 f0 35 52 25  3d a4 4d 49 58 28 52 31  |1%...5R%=.MIX(R1|
00000290  25 2c 52 32 25 2c 49 31  25 2c 49 32 25 29 3a 47  |%,R2%,I1%,I2%):G|
000002a0  25 3d a4 4d 49 58 28 47  31 25 2c 47 32 25 2c 49  |%=.MIX(G1%,G2%,I|
000002b0  31 25 2c 49 32 25 29 0d  00 fa 2b 42 25 3d a4 4d  |1%,I2%)...+B%=.M|
000002c0  49 58 28 42 31 25 2c 42  32 25 2c 49 31 25 2c 49  |IX(B1%,B2%,I1%,I|
000002d0  32 25 29 3a f2 52 47 42  28 52 25 2c 47 25 2c 42  |2%):.RGB(R%,G%,B|
000002e0  25 29 0d 01 04 0f c8 92  20 58 25 2c 59 25 3a ed  |%)...... X%,Y%:.|
000002f0  2c 0d 01 0e 20 c8 99 22  4f 53 5f 53 70 72 69 74  |,... .."OS_Sprit|
00000300  65 4f 70 22 2c 32 35 36  2b 36 30 2c 53 50 52 2c  |eOp",256+60,SPR,|
00000310  30 0d 01 18 43 53 3d b3  28 31 29 2a 32 2a af 3a  |0...CS=.(1)*2*.:|
00000320  44 3d b3 28 31 29 2a 2e  30 32 2b 30 2e 30 31 35  |D=.(1)*.02+0.015|
00000330  3a 58 25 3d 50 58 25 28  50 25 29 3a 57 3d 4e 46  |:X%=PX%(P%):W=NF|
00000340  2a 4e 25 2f 38 3a 45 3d  b3 28 31 29 2a 2e 37 35  |*N%/8:E=.(1)*.75|
00000350  2b 2e 32 35 0d 01 22 0e  e3 59 25 3d 30 b8 4e 25  |+.25.."..Y%=0.N%|
00000360  88 32 0d 01 2c 27 53 3d  53 2b 44 3a 46 3d 28 31  |.2..,'S=S+D:F=(1|
00000370  2d 59 25 2f 4e 25 29 3a  58 31 25 3d 31 30 30 2a  |-Y%/N%):X1%=100*|
00000380  46 2a 45 2a b5 53 2b 58  25 0d 01 36 12 53 43 21  |F*E*.S+X%..6.SC!|
00000390  30 30 3d 32 35 36 2a 46  2a 4e 46 0d 01 40 24 c8  |00=256*F*NF..@$.|
000003a0  99 22 4f 53 5f 53 70 72  69 74 65 4f 70 22 2c 32  |."OS_SpriteOp",2|
000003b0  35 36 2b 36 30 2c 53 50  52 2c 22 43 4f 4c 22 0d  |56+60,SPR,"COL".|
000003c0  01 4a 0e 43 25 3d b3 28  31 36 29 2d 31 0d 01 54  |.J.C%=.(16)-1..T|
000003d0  33 c8 99 22 4f 53 5f 53  70 72 69 74 65 4f 70 22  |3.."OS_SpriteOp"|
000003e0  2c 32 35 36 2b 31 36 2c  53 50 52 2c 22 4c 49 4e  |,256+16,SPR,"LIN|
000003f0  45 22 2c 30 2c 30 2c 43  25 2c 32 35 35 2c 43 25  |E",0,0,C%,255,C%|
00000400  0d 01 5e 20 c8 99 22 4f  53 5f 53 70 72 69 74 65  |..^ .."OS_Sprite|
00000410  4f 70 22 2c 32 35 36 2b  36 30 2c 53 50 52 2c 30  |Op",256+60,SPR,0|
00000420  0d 01 68 35 c8 99 22 4f  53 5f 53 70 72 69 74 65  |..h5.."OS_Sprite|
00000430  4f 70 22 2c 32 35 36 2b  35 32 2c 53 50 52 2c 22  |Op",256+52,SPR,"|
00000440  4c 49 4e 45 22 2c 58 31  25 2d 57 2a 46 2c 59 25  |LINE",X1%-W*F,Y%|
00000450  2c 30 2c 53 43 0d 01 72  06 ed 2c 0d 01 7c 05 e0  |,0,SC..r..,..|..|
00000460  0d 01 86 04 0d 01 90 13  dd f2 52 47 42 28 52 25  |..........RGB(R%|
00000470  2c 47 25 2c 42 25 29 0d  01 9a 25 ea 20 43 25 3a  |,G%,B%)...%. C%:|
00000480  43 25 3d 28 52 25 3c 3c  38 29 2b 28 47 25 3c 3c  |C%=(R%<<8)+(G%<<|
00000490  31 36 29 2b 28 42 25 3c  3c 32 34 29 0d 01 a4 28  |16)+(B%<<24)...(|
000004a0  c8 99 20 22 43 6f 6c 6f  75 72 54 72 61 6e 73 5f  |.. "ColourTrans_|
000004b0  53 65 74 47 43 4f 4c 22  2c 43 25 2c 2c 2c 26 31  |SetGCOL",C%,,,&1|
000004c0  30 30 2c 30 0d 01 ae 05  e1 0d 01 b8 04 0d 01 c2  |00,0............|
000004d0  1a dd a4 4d 49 58 28 43  31 25 2c 43 32 25 2c 49  |...MIX(C1%,C2%,I|
000004e0  31 25 2c 49 32 25 29 0d  01 cc 08 ea 20 43 25 0d  |1%,I2%)..... C%.|
000004f0  01 d6 3a 43 25 3d 28 43  31 25 2a 49 31 25 2b 43  |..:C%=(C1%*I1%+C|
00000500  32 25 2a 49 32 25 29 2f  28 49 31 25 2b 49 32 25  |2%*I2%)/(I1%+I2%|
00000510  29 2b b3 28 33 33 29 2d  31 37 3a e7 43 25 3e 32  |)+.(33)-17:.C%>2|
00000520  35 35 20 43 25 3d 32 35  35 0d 01 e0 0e e7 43 25  |55 C%=255.....C%|
00000530  3c 30 20 43 25 3d 30 0d  01 ea 07 3d 43 25 0d 01  |<0 C%=0....=C%..|
00000540  f4 04 0d 01 fe 33 c8 99  22 4f 53 5f 53 70 72 69  |.....3.."OS_Spri|
00000550  74 65 4f 70 22 2c 32 35  36 2b 36 30 2c 53 50 52  |teOp",256+60,SPR|
00000560  2c 30 3a f6 3a f1 22 20  61 74 20 6c 69 6e 65 20  |,0:.:." at line |
00000570  22 c3 28 9e 29 0d ff                              |".(.)..|
00000577