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InTheMag/DrawBasic/!DrawBasic/Library/Examples/Chapter/Exer_3/Ex_3/1MagicRose

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-1995-05-Disc1.adf » AWMay95_1
Filename: InTheMag/DrawBasic/!DrawBasic/Library/Examples/Chapter/Exer_3/Ex_3/1MagicRose
Read OK: ✔
File size: 016D bytes
Load address: 0000
Exec address: 0000
Duplicates

There are 3 duplicate copies of this file in the archive:

File contents
REM > Magic Rose based on circle centre (a,b) with n points
      a=5 : b=5 : radius=5

      �Origin(a,b)
      
      INPUT "# of points";n
      angle=2*PI/n
      

 �PathBegin(curve)  
  FOR i=1 TO n
   theta_i=i*angle   
   FOR j=i TO n
    theta_j=j*angle
    �MovePolar(radius,theta_i) : �DrawPolar(radius,theta_j)
    NEXT
   NEXT   
  �PathEnd
  
  �Quit
00000000  0a 52 45 4d 20 3e 20 4d  61 67 69 63 20 52 6f 73  |.REM > Magic Ros|
00000010  65 20 62 61 73 65 64 20  6f 6e 20 63 69 72 63 6c  |e based on circl|
00000020  65 20 63 65 6e 74 72 65  20 28 61 2c 62 29 20 77  |e centre (a,b) w|
00000030  69 74 68 20 6e 20 70 6f  69 6e 74 73 0a 20 20 20  |ith n points.   |
00000040  20 20 20 61 3d 35 20 3a  20 62 3d 35 20 3a 20 72  |   a=5 : b=5 : r|
00000050  61 64 69 75 73 3d 35 0a  0a 20 20 20 20 20 20 a0  |adius=5..      .|
00000060  4f 72 69 67 69 6e 28 61  2c 62 29 0a 20 20 20 20  |Origin(a,b).    |
00000070  20 20 0a 20 20 20 20 20  20 49 4e 50 55 54 20 22  |  .      INPUT "|
00000080  23 20 6f 66 20 70 6f 69  6e 74 73 22 3b 6e 0a 20  |# of points";n. |
00000090  20 20 20 20 20 61 6e 67  6c 65 3d 32 2a 50 49 2f  |     angle=2*PI/|
000000a0  6e 0a 20 20 20 20 20 20  0a 0a 20 a0 50 61 74 68  |n.      .. .Path|
000000b0  42 65 67 69 6e 28 63 75  72 76 65 29 20 20 0a 20  |Begin(curve)  . |
000000c0  20 46 4f 52 20 69 3d 31  20 54 4f 20 6e 0a 20 20  | FOR i=1 TO n.  |
000000d0  20 74 68 65 74 61 5f 69  3d 69 2a 61 6e 67 6c 65  | theta_i=i*angle|
000000e0  20 20 20 0a 20 20 20 46  4f 52 20 6a 3d 69 20 54  |   .   FOR j=i T|
000000f0  4f 20 6e 0a 20 20 20 20  74 68 65 74 61 5f 6a 3d  |O n.    theta_j=|
00000100  6a 2a 61 6e 67 6c 65 0a  20 20 20 20 a0 4d 6f 76  |j*angle.    .Mov|
00000110  65 50 6f 6c 61 72 28 72  61 64 69 75 73 2c 74 68  |ePolar(radius,th|
00000120  65 74 61 5f 69 29 20 3a  20 a0 44 72 61 77 50 6f  |eta_i) : .DrawPo|
00000130  6c 61 72 28 72 61 64 69  75 73 2c 74 68 65 74 61  |lar(radius,theta|
00000140  5f 6a 29 0a 20 20 20 20  4e 45 58 54 0a 20 20 20  |_j).    NEXT.   |
00000150  4e 45 58 54 20 20 20 0a  20 20 a0 50 61 74 68 45  |NEXT   .  .PathE|
00000160  6e 64 0a 20 20 0a 20 20  a0 51 75 69 74           |nd.  .  .Quit|
0000016d

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