Home » Personal collection » Acorn ADFS disks » Electron » Programs_B.ADF » Graphics/Spiral
Graphics/Spiral
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 » Personal collection » Acorn ADFS disks » Electron » Programs_B.ADF |
Filename: | Graphics/Spiral |
Read OK: | ✔ |
File size: | 02B0 bytes |
Load address: | FFFFFB46 |
Exec address: | 5185EE43 |
Duplicates
There is 1 duplicate copy of this file in the archive:
- Personal collection » Acorn ADFS disks » Electron » Programs_B.ADF » Graphics/Spiral
- Personal collection » Acorn hard disk » misc » misc2 » dcfprogs/Graphics/Spiral
File contents
10REM Spiral 20REM by Stephen Bennett 30REM (c) Electron User 40OSCLI"FX178" 50A%=163:X%=128:Y%=1 60X%=128 70Y%=1 80REM CALL&FFF4 90DIMsin(360),cos(360) 100FORA%=0 TO 360 STEP 4 110sin(A%)=SIN(RAD(A%)) 120cos(A%)=COS(RAD(A%)) 130NEXT 140MODE2 150VDU23,1,0;0;0;0; 160VDU29,640;512; 170C%=0 180FORB%=928TO824STEP-8 190IF C%=0 OR C%=8 C%=C%+1 200R=B% 210MOVE640,B% 220GCOL0,C% 230C%=C%+1 240A%=0 250REPEAT 260A%=(A%+4) MOD 360 270R=R-(112/90) 280DRAW sin(A%)*R,cos(A%)*R 290UNTILR<2 300NEXT 310A%=23 320?&FE07=?&282 330D%=-1 340S%=0 350REPEAT 360IF INKEY-98 D%=-1 ELSE IF INKEY-67 D%=1 370IF INKEY-73 AND S%>0 S%=S%-4 ELSE IF INKEY-105 AND S%<500 S%=S%+4 380IF A%=16 OR A%=24 A%=A%+D% 390VDU19,A%,0;0;19,A%-8,1;0; 400A%=A%+D% 410IF A%<16 A%=A%+16 ELSE IF A%>31 A%=A%-16 420FORT%=0TOS% 430NEXT 440UNTIL0
� Spiral � by Stephen Bennett � (c) Electron User (�"FX178" 2A%=163:X%=128:Y%=1 < X%=128 FY%=1 P� CALL&FFF4 Z�sin(360),cos(360) d�A%=0 � 360 � 4 nsin(A%)=�(�(A%)) xcos(A%)=�(�(A%)) �� ��2 ��23,1,0;0;0;0; ��29,640;512; �C%=0 ��B%=928�824�-8 �� C%=0 � C%=8 C%=C%+1 �R=B% ��640,B% � �0,C% �C%=C%+1 �A%=0 �� A%=(A%+4) � 360 R=R-(112/90) � sin(A%)*R,cos(A%)*R "�R<2 ,� 6 A%=23 @?&FE07=?&282 J D%=-1 TS%=0 ^� h� �-98 D%=-1 � � �-67 D%=1 r4� �-73 � S%>0 S%=S%-4 � � �-105 � S%<500 S%=S%+4 |� A%=16 � A%=24 A%=A%+D% ��19,A%,0;0;19,A%-8,1;0; �A%=A%+D% �'� A%<16 A%=A%+16 � � A%>31 A%=A%-16 ��T%=0�S% �� ��0 �
00000000 0d 00 0a 0c f4 20 53 70 69 72 61 6c 0d 00 14 18 |..... Spiral....| 00000010 f4 20 62 79 20 53 74 65 70 68 65 6e 20 42 65 6e |. by Stephen Ben| 00000020 6e 65 74 74 0d 00 1e 17 f4 20 28 63 29 20 45 6c |nett..... (c) El| 00000030 65 63 74 72 6f 6e 20 55 73 65 72 0d 00 28 0c ff |ectron User..(..| 00000040 22 46 58 31 37 38 22 0d 00 32 16 41 25 3d 31 36 |"FX178"..2.A%=16| 00000050 33 3a 58 25 3d 31 32 38 3a 59 25 3d 31 0d 00 3c |3:X%=128:Y%=1..<| 00000060 0a 58 25 3d 31 32 38 0d 00 46 08 59 25 3d 31 0d |.X%=128..F.Y%=1.| 00000070 00 50 0f f4 20 43 41 4c 4c 26 46 46 46 34 0d 00 |.P.. CALL&FFF4..| 00000080 5a 16 de 73 69 6e 28 33 36 30 29 2c 63 6f 73 28 |Z..sin(360),cos(| 00000090 33 36 30 29 0d 00 64 13 e3 41 25 3d 30 20 b8 20 |360)..d..A%=0 . | 000000a0 33 36 30 20 88 20 34 0d 00 6e 14 73 69 6e 28 41 |360 . 4..n.sin(A| 000000b0 25 29 3d b5 28 b2 28 41 25 29 29 0d 00 78 14 63 |%)=.(.(A%))..x.c| 000000c0 6f 73 28 41 25 29 3d 9b 28 b2 28 41 25 29 29 0d |os(A%)=.(.(A%)).| 000000d0 00 82 05 ed 0d 00 8c 06 eb 32 0d 00 96 12 ef 32 |.........2.....2| 000000e0 33 2c 31 2c 30 3b 30 3b 30 3b 30 3b 0d 00 a0 10 |3,1,0;0;0;0;....| 000000f0 ef 32 39 2c 36 34 30 3b 35 31 32 3b 0d 00 aa 08 |.29,640;512;....| 00000100 43 25 3d 30 0d 00 b4 12 e3 42 25 3d 39 32 38 b8 |C%=0.....B%=928.| 00000110 38 32 34 88 2d 38 0d 00 be 19 e7 20 43 25 3d 30 |824.-8..... C%=0| 00000120 20 84 20 43 25 3d 38 20 43 25 3d 43 25 2b 31 0d | . C%=8 C%=C%+1.| 00000130 00 c8 08 52 3d 42 25 0d 00 d2 0b ec 36 34 30 2c |...R=B%.....640,| 00000140 42 25 0d 00 dc 09 e6 30 2c 43 25 0d 00 e6 0b 43 |B%.....0,C%....C| 00000150 25 3d 43 25 2b 31 0d 00 f0 08 41 25 3d 30 0d 00 |%=C%+1....A%=0..| 00000160 fa 05 f5 0d 01 04 13 41 25 3d 28 41 25 2b 34 29 |.......A%=(A%+4)| 00000170 20 83 20 33 36 30 0d 01 0e 10 52 3d 52 2d 28 31 | . 360....R=R-(1| 00000180 31 32 2f 39 30 29 0d 01 18 19 df 20 73 69 6e 28 |12/90)..... sin(| 00000190 41 25 29 2a 52 2c 63 6f 73 28 41 25 29 2a 52 0d |A%)*R,cos(A%)*R.| 000001a0 01 22 08 fd 52 3c 32 0d 01 2c 05 ed 0d 01 36 09 |."..R<2..,....6.| 000001b0 41 25 3d 32 33 0d 01 40 10 3f 26 46 45 30 37 3d |A%=23..@.?&FE07=| 000001c0 3f 26 32 38 32 0d 01 4a 09 44 25 3d 2d 31 0d 01 |?&282..J.D%=-1..| 000001d0 54 08 53 25 3d 30 0d 01 5e 05 f5 0d 01 68 1e e7 |T.S%=0..^....h..| 000001e0 20 a6 2d 39 38 20 44 25 3d 2d 31 20 8b 20 e7 20 | .-98 D%=-1 . . | 000001f0 a6 2d 36 37 20 44 25 3d 31 0d 01 72 34 e7 20 a6 |.-67 D%=1..r4. .| 00000200 2d 37 33 20 80 20 53 25 3e 30 20 53 25 3d 53 25 |-73 . S%>0 S%=S%| 00000210 2d 34 20 8b 20 e7 20 a6 2d 31 30 35 20 80 20 53 |-4 . . .-105 . S| 00000220 25 3c 35 30 30 20 53 25 3d 53 25 2b 34 0d 01 7c |%<500 S%=S%+4..|| 00000230 1c e7 20 41 25 3d 31 36 20 84 20 41 25 3d 32 34 |.. A%=16 . A%=24| 00000240 20 41 25 3d 41 25 2b 44 25 0d 01 86 1b ef 31 39 | A%=A%+D%.....19| 00000250 2c 41 25 2c 30 3b 30 3b 31 39 2c 41 25 2d 38 2c |,A%,0;0;19,A%-8,| 00000260 31 3b 30 3b 0d 01 90 0c 41 25 3d 41 25 2b 44 25 |1;0;....A%=A%+D%| 00000270 0d 01 9a 27 e7 20 41 25 3c 31 36 20 41 25 3d 41 |...'. A%<16 A%=A| 00000280 25 2b 31 36 20 8b 20 e7 20 41 25 3e 33 31 20 41 |%+16 . . A%>31 A| 00000290 25 3d 41 25 2d 31 36 0d 01 a4 0c e3 54 25 3d 30 |%=A%-16.....T%=0| 000002a0 b8 53 25 0d 01 ae 05 ed 0d 01 b8 06 fd 30 0d ff |.S%..........0..| 000002b0