Home » Archimedes archive » Archimedes World » AW-1991-08.adf » August91 » !AWAug91/Goodies/TurtleGRFX/SSquare

!AWAug91/Goodies/TurtleGRFX/SSquare

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 » Archimedes World » AW-1991-08.adf » August91
Filename: !AWAug91/Goodies/TurtleGRFX/SSquare
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File size: 085C bytes
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File contents
   10REM>SSquare
   20
   30REM   Program: SSquare v1.01 10 Mar 1991
   40REM   Author:  I.M.Kinghan 1991
   50REM   Purpose: Draw Sierpinkski Square using Turtle Graphics.
   60REM   Copyright: Archimedes World August 1991
   70
   80LIBRARY "$.TurtleGRFX.TurtleGRFX"
   90MODE 15
  100GCOL 0,128
  110TINT 3,192
  120ON
  130CLG
  140
  150INPUT "Level,1-4",Level%
  160IF Level%<1 THEN Level%=1
  170IF Level%>4 THEN Level%=4
  171INPUT "Show Turtle (y/n)",Turtle$
  180OFF
  190CLG
  200
  210PROCInit
  211IF Turtle$="y" OR Turtle$="Y" THEN PROCtshow
  220PROCSSquare(Level%,Step%,Angle,Stack%,WorkStackSize%)
  230END
  240
  250DEFPROCGlobals
  260X%=250
  270Y%=100
  280WorkStackSize%=8000
  290TurtleStackSize%=128
  300Angle=DEG PI/2
  310Step%=40 DIV Level%
  320Go%=1
  330Right%=2
  340Left%=3
  350Push%=4
  360Pop%=5
  370Up%=6
  380Down%=7
  390ENDPROC
  400
  410DEFPROCInit
  420PROCGlobals
  430DIM Stack% WorkStackSize%
  440PROCtstart
  450PROCtstack(TurtleStackSize%)
  460PROCtjump(X%,Y%,0)
  470PROCtgcol(0,63)
  480PROCtpen(1)
  490ENDPROC
  500
  510DEFPROCSSquare(level%,step%,angle,stack%,stacksize%)
  520LOCAL ptr%
  530ptr%=stacksize%: stack%?ptr%=0
  540ptr%-=1: stack%?ptr%=Go%
  550ptr%-=1: stack%?ptr%=Right%
  560ptr%-=1: stack%?ptr%=Go%
  570ptr%-=1: stack%?ptr%=Right%
  580ptr%-=1: stack%?ptr%=Go%
  590ptr%-=1: stack%?ptr%=Right%
  600ptr%-=1: stack%?ptr%=Go%
  610WHILE ptr%<stacksize%
  620   CASE stack%?ptr% OF
  630   WHEN Go%
  640      IF level%=0 THEN
  650         PROCtgo(step%)
  660      ELSE
  670         IF ptr%<12 THEN PROCStackError
  680         stack%?ptr%=Up%: ptr%-=1
  690         stack%?ptr%=Go%: ptr%-=1
  700         stack%?ptr%=Go%: ptr%-=1
  710         stack%?ptr%=Right%: ptr%-=1
  720         stack%?ptr%=Go%: ptr%-=1
  730         stack%?ptr%=Right%: ptr%-=1
  740         stack%?ptr%=Go%: ptr%-=1
  750         stack%?ptr%=Right%: ptr%-=1
  760         stack%?ptr%=Go%: ptr%-=1
  770         stack%?ptr%=Right%: ptr%-=1
  780         stack%?ptr%=Go%: ptr%-=1
  790         stack%?ptr%=Go%: ptr%-=1
  800         stack%?ptr%=Down%: ptr%-=1
  810      ENDIF
  820   WHEN Right%
  830      PROCtturn(angle)
  840   WHEN Left%
  850      PROCtturn(-angle)
  860   WHEN Push%
  870      PROCtrecord
  880   WHEN Pop%
  890      PROCtrestore
  900   WHEN Down%
  910      level%-=1
  940   WHEN Up%
  950      level%+=1
  980   ENDCASE
  990   ptr%+=1
 1000ENDWHILE
 1010ENDPROC
 1020
 1030DEFPROCStackError
 1040ERROR 255,"Out of working stack. Increase WorkStackSize%"
 1050END
 1060ENDPROC


�>SSquare

*�   Program: SSquare v1.01 10 Mar 1991
(!�   Author:  I.M.Kinghan 1991
2?�   Purpose: Draw Sierpinkski Square using Turtle Graphics.
</�   Copyright: Archimedes World August 1991
F
P ț "$.TurtleGRFX.TurtleGRFX"
Z� 15
d� 0,128
nȜ 3,192
x�
��
�
�� "Level,1-4",Level%
�� Level%<1 � Level%=1
�� Level%>4 � Level%=4
�!� "Show Turtle (y/n)",Turtle$
��
��
�
�	�Init
�(� Turtle$="y" � Turtle$="Y" � �tshow
�6�SSquare(Level%,Step%,Angle,Stack%,WorkStackSize%)
��
�
�
��Globals

X%=250

Y%=100
WorkStackSize%=8000
"TurtleStackSize%=128
,Angle=� �/2
6Step%=40 � Level%
@	Go%=1
JRight%=2
TLeft%=3
^Push%=4
h
Pop%=5
r	Up%=6
|Down%=7
��
�
�
��Init
��Globals
�� Stack% WorkStackSize%
��tstart
��tstack(TurtleStackSize%)
��tjump(X%,Y%,0)
��tgcol(0,63)
��tpen(1)
��
�
�3��SSquare(level%,step%,angle,stack%,stacksize%)

� ptr%
"ptr%=stacksize%: stack%?ptr%=0
ptr%-=1: stack%?ptr%=Go%
&ptr%-=1: stack%?ptr%=Right%
0ptr%-=1: stack%?ptr%=Go%
:ptr%-=1: stack%?ptr%=Right%
Dptr%-=1: stack%?ptr%=Go%
Nptr%-=1: stack%?ptr%=Right%
Xptr%-=1: stack%?ptr%=Go%
bȕ ptr%<stacksize%
l   Ȏ stack%?ptr% �
v   � Go%
�      � level%=0 �
�         �tgo(step%)
�      �
�$         � ptr%<12 � �StackError
�%         stack%?ptr%=Up%: ptr%-=1
�%         stack%?ptr%=Go%: ptr%-=1
�%         stack%?ptr%=Go%: ptr%-=1
�(         stack%?ptr%=Right%: ptr%-=1
�%         stack%?ptr%=Go%: ptr%-=1
�(         stack%?ptr%=Right%: ptr%-=1
�%         stack%?ptr%=Go%: ptr%-=1
�(         stack%?ptr%=Right%: ptr%-=1
�%         stack%?ptr%=Go%: ptr%-=1
(         stack%?ptr%=Right%: ptr%-=1
%         stack%?ptr%=Go%: ptr%-=1
%         stack%?ptr%=Go%: ptr%-=1
 '         stack%?ptr%=Down%: ptr%-=1
*      �
4   � Right%
>      �tturn(angle)
H   � Left%
R      �tturn(-angle)
\   � Push%
f      �trecord
p
   � Pop%
z      �trestore
�   � Down%
�      level%-=1
�   � Up%
�      level%+=1
�   �
�   ptr%+=1
��
��
�
��StackError
9� 255,"Out of working stack. Increase WorkStackSize%"
�
$�
�
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00000010  04 0d 00 1e 2a f4 20 20  20 50 72 6f 67 72 61 6d  |....*.   Program|
00000020  3a 20 53 53 71 75 61 72  65 20 76 31 2e 30 31 20  |: SSquare v1.01 |
00000030  31 30 20 4d 61 72 20 31  39 39 31 0d 00 28 21 f4  |10 Mar 1991..(!.|
00000040  20 20 20 41 75 74 68 6f  72 3a 20 20 49 2e 4d 2e  |   Author:  I.M.|
00000050  4b 69 6e 67 68 61 6e 20  31 39 39 31 0d 00 32 3f  |Kinghan 1991..2?|
00000060  f4 20 20 20 50 75 72 70  6f 73 65 3a 20 44 72 61  |.   Purpose: Dra|
00000070  77 20 53 69 65 72 70 69  6e 6b 73 6b 69 20 53 71  |w Sierpinkski Sq|
00000080  75 61 72 65 20 75 73 69  6e 67 20 54 75 72 74 6c  |uare using Turtl|
00000090  65 20 47 72 61 70 68 69  63 73 2e 0d 00 3c 2f f4  |e Graphics...</.|
000000a0  20 20 20 43 6f 70 79 72  69 67 68 74 3a 20 41 72  |   Copyright: Ar|
000000b0  63 68 69 6d 65 64 65 73  20 57 6f 72 6c 64 20 41  |chimedes World A|
000000c0  75 67 75 73 74 20 31 39  39 31 0d 00 46 04 0d 00  |ugust 1991..F...|
000000d0  50 20 c8 9b 20 22 24 2e  54 75 72 74 6c 65 47 52  |P .. "$.TurtleGR|
000000e0  46 58 2e 54 75 72 74 6c  65 47 52 46 58 22 0d 00  |FX.TurtleGRFX"..|
000000f0  5a 08 eb 20 31 35 0d 00  64 0b e6 20 30 2c 31 32  |Z.. 15..d.. 0,12|
00000100  38 0d 00 6e 0c c8 9c 20  33 2c 31 39 32 0d 00 78  |8..n... 3,192..x|
00000110  05 ee 0d 00 82 05 da 0d  00 8c 04 0d 00 96 18 e8  |................|
00000120  20 22 4c 65 76 65 6c 2c  31 2d 34 22 2c 4c 65 76  | "Level,1-4",Lev|
00000130  65 6c 25 0d 00 a0 19 e7  20 4c 65 76 65 6c 25 3c  |el%..... Level%<|
00000140  31 20 8c 20 4c 65 76 65  6c 25 3d 31 0d 00 aa 19  |1 . Level%=1....|
00000150  e7 20 4c 65 76 65 6c 25  3e 34 20 8c 20 4c 65 76  |. Level%>4 . Lev|
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00000170  20 54 75 72 74 6c 65 20  28 79 2f 6e 29 22 2c 54  | Turtle (y/n)",T|
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00000190  0d 00 c8 04 0d 00 d2 09  f2 49 6e 69 74 0d 00 d3  |.........Init...|
000001a0  28 e7 20 54 75 72 74 6c  65 24 3d 22 79 22 20 84  |(. Turtle$="y" .|
000001b0  20 54 75 72 74 6c 65 24  3d 22 59 22 20 8c 20 f2  | Turtle$="Y" . .|
000001c0  74 73 68 6f 77 0d 00 dc  36 f2 53 53 71 75 61 72  |tshow...6.SSquar|
000001d0  65 28 4c 65 76 65 6c 25  2c 53 74 65 70 25 2c 41  |e(Level%,Step%,A|
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000001f0  53 74 61 63 6b 53 69 7a  65 25 29 0d 00 e6 05 e0  |StackSize%).....|
00000200  0d 00 f0 04 0d 00 fa 0d  dd f2 47 6c 6f 62 61 6c  |..........Global|
00000210  73 0d 01 04 0a 58 25 3d  32 35 30 0d 01 0e 0a 59  |s....X%=250....Y|
00000220  25 3d 31 30 30 0d 01 18  17 57 6f 72 6b 53 74 61  |%=100....WorkSta|
00000230  63 6b 53 69 7a 65 25 3d  38 30 30 30 0d 01 22 18  |ckSize%=8000..".|
00000240  54 75 72 74 6c 65 53 74  61 63 6b 53 69 7a 65 25  |TurtleStackSize%|
00000250  3d 31 32 38 0d 01 2c 0f  41 6e 67 6c 65 3d 9d 20  |=128..,.Angle=. |
00000260  af 2f 32 0d 01 36 15 53  74 65 70 25 3d 34 30 20  |./2..6.Step%=40 |
00000270  81 20 4c 65 76 65 6c 25  0d 01 40 09 47 6f 25 3d  |. Level%..@.Go%=|
00000280  31 0d 01 4a 0c 52 69 67  68 74 25 3d 32 0d 01 54  |1..J.Right%=2..T|
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000002a0  25 3d 34 0d 01 68 0a 50  6f 70 25 3d 35 0d 01 72  |%=4..h.Pop%=5..r|
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000002c0  37 0d 01 86 05 e1 0d 01  90 04 0d 01 9a 0a dd f2  |7...............|
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00000390  08 0a ea 20 70 74 72 25  0d 02 12 22 70 74 72 25  |... ptr%..."ptr%|
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000003b0  63 6b 25 3f 70 74 72 25  3d 30 0d 02 1c 1c 70 74  |ck%?ptr%=0....pt|
000003c0  72 25 2d 3d 31 3a 20 73  74 61 63 6b 25 3f 70 74  |r%-=1: stack%?pt|
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000004d0  6c 25 3d 30 20 8c 0d 02  8a 18 20 20 20 20 20 20  |l%=0 .....      |
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00000500  20 20 20 20 20 20 e7 20  70 74 72 25 3c 31 32 20  |      . ptr%<12 |
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00000520  25 20 20 20 20 20 20 20  20 20 73 74 61 63 6b 25  |%         stack%|
00000530  3f 70 74 72 25 3d 55 70  25 3a 20 70 74 72 25 2d  |?ptr%=Up%: ptr%-|
00000540  3d 31 0d 02 b2 25 20 20  20 20 20 20 20 20 20 73  |=1...%         s|
00000550  74 61 63 6b 25 3f 70 74  72 25 3d 47 6f 25 3a 20  |tack%?ptr%=Go%: |
00000560  70 74 72 25 2d 3d 31 0d  02 bc 25 20 20 20 20 20  |ptr%-=1...%     |
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00000590  20 20 20 20 20 20 20 20  20 73 74 61 63 6b 25 3f  |         stack%?|
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00000630  20 20 20 73 74 61 63 6b  25 3f 70 74 72 25 3d 52  |   stack%?ptr%=R|
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00000670  2d 3d 31 0d 03 02 28 20  20 20 20 20 20 20 20 20  |-=1...(         |
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00000700  77 6e 25 3a 20 70 74 72  25 2d 3d 31 0d 03 2a 0b  |wn%: ptr%-=1..*.|
00000710  20 20 20 20 20 20 cd 0d  03 34 0f 20 20 20 c9 20  |      ...4.   . |
00000720  52 69 67 68 74 25 0d 03  3e 17 20 20 20 20 20 20  |Right%..>.      |
00000730  f2 74 74 75 72 6e 28 61  6e 67 6c 65 29 0d 03 48  |.tturn(angle)..H|
00000740  0e 20 20 20 c9 20 4c 65  66 74 25 0d 03 52 18 20  |.   . Left%..R. |
00000750  20 20 20 20 20 f2 74 74  75 72 6e 28 2d 61 6e 67  |     .tturn(-ang|
00000760  6c 65 29 0d 03 5c 0e 20  20 20 c9 20 50 75 73 68  |le)..\.   . Push|
00000770  25 0d 03 66 12 20 20 20  20 20 20 f2 74 72 65 63  |%..f.      .trec|
00000780  6f 72 64 0d 03 70 0d 20  20 20 c9 20 50 6f 70 25  |ord..p.   . Pop%|
00000790  0d 03 7a 13 20 20 20 20  20 20 f2 74 72 65 73 74  |..z.      .trest|
000007a0  6f 72 65 0d 03 84 0e 20  20 20 c9 20 44 6f 77 6e  |ore....   . Down|
000007b0  25 0d 03 8e 13 20 20 20  20 20 20 6c 65 76 65 6c  |%....      level|
000007c0  25 2d 3d 31 0d 03 ac 0c  20 20 20 c9 20 55 70 25  |%-=1....   . Up%|
000007d0  0d 03 b6 13 20 20 20 20  20 20 6c 65 76 65 6c 25  |....      level%|
000007e0  2b 3d 31 0d 03 d4 08 20  20 20 cb 0d 03 de 0e 20  |+=1....   ..... |
000007f0  20 20 70 74 72 25 2b 3d  31 0d 03 e8 05 ce 0d 03  |  ptr%+=1.......|
00000800  f2 05 e1 0d 03 fc 04 0d  04 06 10 dd f2 53 74 61  |.............Sta|
00000810  63 6b 45 72 72 6f 72 0d  04 10 39 85 20 32 35 35  |ckError...9. 255|
00000820  2c 22 4f 75 74 20 6f 66  20 77 6f 72 6b 69 6e 67  |,"Out of working|
00000830  20 73 74 61 63 6b 2e 20  49 6e 63 72 65 61 73 65  | stack. Increase|
00000840  20 57 6f 72 6b 53 74 61  63 6b 53 69 7a 65 25 22  | WorkStackSize%"|
00000850  0d 04 1a 05 e0 0d 04 24  05 e1 0d ff              |.......$....|
0000085c