Home » Archimedes archive » Acorn User » AU 1996-02.adf » Regulars » StarInfo/Vibe/Snowflake

StarInfo/Vibe/Snowflake

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 1996-02.adf » Regulars
Filename: StarInfo/Vibe/Snowflake
Read OK:
File size: 039A bytes
Load address: 0000
Exec address: 0000
File contents
   10REM > SNOWFLAKE
   20
   30MODE31:OFF
   40K%=10000:S%=40
   50FORN%=1TO15:COLOURN%,16*N%,16*N%,255:NEXT
   60DIM X(K%),Y(K%),A%(K%),P%(K%),SI(5),CO(5)
   70FORN%=0TO5:T=RAD(60*N%+30):SI(N%)=SINT:CO(N%)=COST:NEXT
   80
   90REPEAT:CLS
  100A$="00":FORN%=1TO28:IF RND(1)>.85 A$+="1" ELSE A$+="0"
  110NEXT:T%=0
  120FORN%=1TO6:T%+=1:X(N%)=800:Y(N%)=600:A%(N%)=N%-1:P%(N%)=0:NEXT
  130FORI%=1TO15:GCOL I%:T1%=T%:R%=RND(15)
  140FORN%=1TOT%
  150X1=X(N%)+S%*SI(A%(N%)):Y1=Y(N%)+S%*CO(A%(N%))
  160PROCL(X(N%),Y(N%),X1,Y1,4*(16-I%)):X(N%)=X1:Y(N%)=Y1
  170P%(N%)=P%(N%)+1:F%=VALMID$(A$,P%(N%),1)
  180IFF%=1 THEN
  190T1%+=1:X(T1%)=X1:Y(T1%)=Y1:A%(T1%)=(A%(N%)+1)MOD6:P%(T1%)=R%
  200T1%+=1:X(T1%)=X1:Y(T1%)=Y1:A%(T1%)=(A%(N%)+5)MOD6:P%(T1%)=R%
  210ENDIF
  220NEXT
  230T%=T1%
  240NEXT
  250K$=INKEY$(500)
  260UNTIL0
  270
  280DEFPROCL(X1,Y1,X2,Y2,W)
  290LOCAL L,T1,T2
  300L=SQR((X1-X2)^2+(Y1-Y2)^2):IF X1>X2 L=-L
  310IF L<>0 THEN
  320T1=ASN((Y1-Y2)/L):T2=T1+PI:W=W/2
  330MOVEX1+W*SINT1,Y1+W*COST1:MOVEX1+W*SINT2,Y1+W*COST2
  340PLOT&75,X2+W*SINT2,Y2+W*COST2
  350CIRCLE FILL X1,Y1,W:CIRCLE FILL X2,Y2,W
  360ELSE
  370CIRCLE FILL X1,Y1,W
  380ENDIF
  390ENDPROC

� > SNOWFLAKE

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(K%=10000:S%=40
2"�N%=1�15:�N%,16*N%,16*N%,255:�
<+� X(K%),Y(K%),A%(K%),P%(K%),SI(5),CO(5)
F/�N%=0�5:T=�(60*N%+30):SI(N%)=�T:CO(N%)=�T:�
P
Z�:�
d1A$="00":�N%=1�28:� �(1)>.85 A$+="1" � A$+="0"
n
�:T%=0
x<�N%=1�6:T%+=1:X(N%)=800:Y(N%)=600:A%(N%)=N%-1:P%(N%)=0:�
�!�I%=1�15:� I%:T1%=T%:R%=�(15)
��N%=1�T%
�1X1=X(N%)+S%*SI(A%(N%)):Y1=Y(N%)+S%*CO(A%(N%))
�5�L(X(N%),Y(N%),X1,Y1,4*(16-I%)):X(N%)=X1:Y(N%)=Y1
�%P%(N%)=P%(N%)+1:F%=��A$,P%(N%),1)
��F%=1 �
�>T1%+=1:X(T1%)=X1:Y(T1%)=Y1:A%(T1%)=(A%(N%)+1)�6:P%(T1%)=R%
�>T1%+=1:X(T1%)=X1:Y(T1%)=Y1:A%(T1%)=(A%(N%)+5)�6:P%(T1%)=R%
��
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T%=T1%
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K$=�(500)
�0

��L(X1,Y1,X2,Y2,W)
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� L,T1,T2
,)L=�((X1-X2)^2+(Y1-Y2)^2):� X1>X2 L=-L
6� L<>0 �
@!T1=�((Y1-Y2)/L):T2=T1+�:W=W/2
J)�X1+W*�T1,Y1+W*�T1:�X1+W*�T2,Y1+W*�T2
T�&75,X2+W*�T2,Y2+W*�T2
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00000000  0d 00 0a 11 f4 20 3e 20  53 4e 4f 57 46 4c 41 4b  |..... > SNOWFLAK|
00000010  45 0d 00 14 04 0d 00 1e  09 eb 33 31 3a 87 0d 00  |E.........31:...|
00000020  28 12 4b 25 3d 31 30 30  30 30 3a 53 25 3d 34 30  |(.K%=10000:S%=40|
00000030  0d 00 32 22 e3 4e 25 3d  31 b8 31 35 3a fb 4e 25  |..2".N%=1.15:.N%|
00000040  2c 31 36 2a 4e 25 2c 31  36 2a 4e 25 2c 32 35 35  |,16*N%,16*N%,255|
00000050  3a ed 0d 00 3c 2b de 20  58 28 4b 25 29 2c 59 28  |:...<+. X(K%),Y(|
00000060  4b 25 29 2c 41 25 28 4b  25 29 2c 50 25 28 4b 25  |K%),A%(K%),P%(K%|
00000070  29 2c 53 49 28 35 29 2c  43 4f 28 35 29 0d 00 46  |),SI(5),CO(5)..F|
00000080  2f e3 4e 25 3d 30 b8 35  3a 54 3d b2 28 36 30 2a  |/.N%=0.5:T=.(60*|
00000090  4e 25 2b 33 30 29 3a 53  49 28 4e 25 29 3d b5 54  |N%+30):SI(N%)=.T|
000000a0  3a 43 4f 28 4e 25 29 3d  9b 54 3a ed 0d 00 50 04  |:CO(N%)=.T:...P.|
000000b0  0d 00 5a 07 f5 3a db 0d  00 64 31 41 24 3d 22 30  |..Z..:...d1A$="0|
000000c0  30 22 3a e3 4e 25 3d 31  b8 32 38 3a e7 20 b3 28  |0":.N%=1.28:. .(|
000000d0  31 29 3e 2e 38 35 20 41  24 2b 3d 22 31 22 20 8b  |1)>.85 A$+="1" .|
000000e0  20 41 24 2b 3d 22 30 22  0d 00 6e 0a ed 3a 54 25  | A$+="0"..n..:T%|
000000f0  3d 30 0d 00 78 3c e3 4e  25 3d 31 b8 36 3a 54 25  |=0..x<.N%=1.6:T%|
00000100  2b 3d 31 3a 58 28 4e 25  29 3d 38 30 30 3a 59 28  |+=1:X(N%)=800:Y(|
00000110  4e 25 29 3d 36 30 30 3a  41 25 28 4e 25 29 3d 4e  |N%)=600:A%(N%)=N|
00000120  25 2d 31 3a 50 25 28 4e  25 29 3d 30 3a ed 0d 00  |%-1:P%(N%)=0:...|
00000130  82 21 e3 49 25 3d 31 b8  31 35 3a e6 20 49 25 3a  |.!.I%=1.15:. I%:|
00000140  54 31 25 3d 54 25 3a 52  25 3d b3 28 31 35 29 0d  |T1%=T%:R%=.(15).|
00000150  00 8c 0c e3 4e 25 3d 31  b8 54 25 0d 00 96 31 58  |....N%=1.T%...1X|
00000160  31 3d 58 28 4e 25 29 2b  53 25 2a 53 49 28 41 25  |1=X(N%)+S%*SI(A%|
00000170  28 4e 25 29 29 3a 59 31  3d 59 28 4e 25 29 2b 53  |(N%)):Y1=Y(N%)+S|
00000180  25 2a 43 4f 28 41 25 28  4e 25 29 29 0d 00 a0 35  |%*CO(A%(N%))...5|
00000190  f2 4c 28 58 28 4e 25 29  2c 59 28 4e 25 29 2c 58  |.L(X(N%),Y(N%),X|
000001a0  31 2c 59 31 2c 34 2a 28  31 36 2d 49 25 29 29 3a  |1,Y1,4*(16-I%)):|
000001b0  58 28 4e 25 29 3d 58 31  3a 59 28 4e 25 29 3d 59  |X(N%)=X1:Y(N%)=Y|
000001c0  31 0d 00 aa 25 50 25 28  4e 25 29 3d 50 25 28 4e  |1...%P%(N%)=P%(N|
000001d0  25 29 2b 31 3a 46 25 3d  bb c1 41 24 2c 50 25 28  |%)+1:F%=..A$,P%(|
000001e0  4e 25 29 2c 31 29 0d 00  b4 0b e7 46 25 3d 31 20  |N%),1).....F%=1 |
000001f0  8c 0d 00 be 3e 54 31 25  2b 3d 31 3a 58 28 54 31  |....>T1%+=1:X(T1|
00000200  25 29 3d 58 31 3a 59 28  54 31 25 29 3d 59 31 3a  |%)=X1:Y(T1%)=Y1:|
00000210  41 25 28 54 31 25 29 3d  28 41 25 28 4e 25 29 2b  |A%(T1%)=(A%(N%)+|
00000220  31 29 83 36 3a 50 25 28  54 31 25 29 3d 52 25 0d  |1).6:P%(T1%)=R%.|
00000230  00 c8 3e 54 31 25 2b 3d  31 3a 58 28 54 31 25 29  |..>T1%+=1:X(T1%)|
00000240  3d 58 31 3a 59 28 54 31  25 29 3d 59 31 3a 41 25  |=X1:Y(T1%)=Y1:A%|
00000250  28 54 31 25 29 3d 28 41  25 28 4e 25 29 2b 35 29  |(T1%)=(A%(N%)+5)|
00000260  83 36 3a 50 25 28 54 31  25 29 3d 52 25 0d 00 d2  |.6:P%(T1%)=R%...|
00000270  05 cd 0d 00 dc 05 ed 0d  00 e6 0a 54 25 3d 54 31  |...........T%=T1|
00000280  25 0d 00 f0 05 ed 0d 00  fa 0d 4b 24 3d bf 28 35  |%.........K$=.(5|
00000290  30 30 29 0d 01 04 06 fd  30 0d 01 0e 04 0d 01 18  |00).....0.......|
000002a0  16 dd f2 4c 28 58 31 2c  59 31 2c 58 32 2c 59 32  |...L(X1,Y1,X2,Y2|
000002b0  2c 57 29 0d 01 22 0d ea  20 4c 2c 54 31 2c 54 32  |,W)..".. L,T1,T2|
000002c0  0d 01 2c 29 4c 3d b6 28  28 58 31 2d 58 32 29 5e  |..,)L=.((X1-X2)^|
000002d0  32 2b 28 59 31 2d 59 32  29 5e 32 29 3a e7 20 58  |2+(Y1-Y2)^2):. X|
000002e0  31 3e 58 32 20 4c 3d 2d  4c 0d 01 36 0c e7 20 4c  |1>X2 L=-L..6.. L|
000002f0  3c 3e 30 20 8c 0d 01 40  21 54 31 3d 98 28 28 59  |<>0 ...@!T1=.((Y|
00000300  31 2d 59 32 29 2f 4c 29  3a 54 32 3d 54 31 2b af  |1-Y2)/L):T2=T1+.|
00000310  3a 57 3d 57 2f 32 0d 01  4a 29 ec 58 31 2b 57 2a  |:W=W/2..J).X1+W*|
00000320  b5 54 31 2c 59 31 2b 57  2a 9b 54 31 3a ec 58 31  |.T1,Y1+W*.T1:.X1|
00000330  2b 57 2a b5 54 32 2c 59  31 2b 57 2a 9b 54 32 0d  |+W*.T2,Y1+W*.T2.|
00000340  01 54 1a f0 26 37 35 2c  58 32 2b 57 2a b5 54 32  |.T..&75,X2+W*.T2|
00000350  2c 59 32 2b 57 2a 9b 54  32 0d 01 5e 1f c8 8f 20  |,Y2+W*.T2..^... |
00000360  c8 90 20 58 31 2c 59 31  2c 57 3a c8 8f 20 c8 90  |.. X1,Y1,W:.. ..|
00000370  20 58 32 2c 59 32 2c 57  0d 01 68 05 cc 0d 01 72  | X2,Y2,W..h....r|
00000380  11 c8 8f 20 c8 90 20 58  31 2c 59 31 2c 57 0d 01  |... .. X1,Y1,W..|
00000390  7c 05 cd 0d 01 86 05 e1  0d ff                    ||.........|
0000039a