Home » Archimedes archive » Acorn User » AU 1994-09.adf » !StarInfo_Star » Seago/!IFS/SampleFile

Seago/!IFS/SampleFile

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 1994-09.adf » !StarInfo_Star
Filename: Seago/!IFS/SampleFile
Read OK:
File size: 0206 bytes
Load address: 0000
Exec address: 0000
File contents
Fractal name
No. of transformations (1-16)
trans1
trans2
...
transX
Accuracy (no. of bits in fraction. 1-14, NB also affects the scale. Decrease
if Number too big error occurs)
scale (larger no. => smaller image, 1-31) increase no. if 'Abort on data
transfer' error occurs
no. of iterations to use. x axis offset y axis offset

where transN is of the form:

a,b,c,d,e,f,prob

when transformations are of the form

x'=ax+by+e
y'=cx+dy+f

and have a probaility prob of occuring (for speed purposes only)
where 0<=prob<=1
00000000  46 72 61 63 74 61 6c 20  6e 61 6d 65 0a 4e 6f 2e  |Fractal name.No.|
00000010  20 6f 66 20 74 72 61 6e  73 66 6f 72 6d 61 74 69  | of transformati|
00000020  6f 6e 73 20 28 31 2d 31  36 29 0a 74 72 61 6e 73  |ons (1-16).trans|
00000030  31 0a 74 72 61 6e 73 32  0a 2e 2e 2e 0a 74 72 61  |1.trans2.....tra|
00000040  6e 73 58 0a 41 63 63 75  72 61 63 79 20 28 6e 6f  |nsX.Accuracy (no|
00000050  2e 20 6f 66 20 62 69 74  73 20 69 6e 20 66 72 61  |. of bits in fra|
00000060  63 74 69 6f 6e 2e 20 31  2d 31 34 2c 20 4e 42 20  |ction. 1-14, NB |
00000070  61 6c 73 6f 20 61 66 66  65 63 74 73 20 74 68 65  |also affects the|
00000080  20 73 63 61 6c 65 2e 20  44 65 63 72 65 61 73 65  | scale. Decrease|
00000090  0a 69 66 20 4e 75 6d 62  65 72 20 74 6f 6f 20 62  |.if Number too b|
000000a0  69 67 20 65 72 72 6f 72  20 6f 63 63 75 72 73 29  |ig error occurs)|
000000b0  0a 73 63 61 6c 65 20 28  6c 61 72 67 65 72 20 6e  |.scale (larger n|
000000c0  6f 2e 20 3d 3e 20 73 6d  61 6c 6c 65 72 20 69 6d  |o. => smaller im|
000000d0  61 67 65 2c 20 31 2d 33  31 29 20 69 6e 63 72 65  |age, 1-31) incre|
000000e0  61 73 65 20 6e 6f 2e 20  69 66 20 27 41 62 6f 72  |ase no. if 'Abor|
000000f0  74 20 6f 6e 20 64 61 74  61 0a 74 72 61 6e 73 66  |t on data.transf|
00000100  65 72 27 20 65 72 72 6f  72 20 6f 63 63 75 72 73  |er' error occurs|
00000110  0a 6e 6f 2e 20 6f 66 20  69 74 65 72 61 74 69 6f  |.no. of iteratio|
00000120  6e 73 20 74 6f 20 75 73  65 2e 20 78 20 61 78 69  |ns to use. x axi|
00000130  73 20 6f 66 66 73 65 74  20 79 20 61 78 69 73 20  |s offset y axis |
00000140  6f 66 66 73 65 74 0a 0a  77 68 65 72 65 20 74 72  |offset..where tr|
00000150  61 6e 73 4e 20 69 73 20  6f 66 20 74 68 65 20 66  |ansN is of the f|
00000160  6f 72 6d 3a 0a 0a 61 2c  62 2c 63 2c 64 2c 65 2c  |orm:..a,b,c,d,e,|
00000170  66 2c 70 72 6f 62 0a 0a  77 68 65 6e 20 74 72 61  |f,prob..when tra|
00000180  6e 73 66 6f 72 6d 61 74  69 6f 6e 73 20 61 72 65  |nsformations are|
00000190  20 6f 66 20 74 68 65 20  66 6f 72 6d 0a 0a 78 27  | of the form..x'|
000001a0  3d 61 78 2b 62 79 2b 65  0a 79 27 3d 63 78 2b 64  |=ax+by+e.y'=cx+d|
000001b0  79 2b 66 0a 0a 61 6e 64  20 68 61 76 65 20 61 20  |y+f..and have a |
000001c0  70 72 6f 62 61 69 6c 69  74 79 20 70 72 6f 62 20  |probaility prob |
000001d0  6f 66 20 6f 63 63 75 72  69 6e 67 20 28 66 6f 72  |of occuring (for|
000001e0  20 73 70 65 65 64 20 70  75 72 70 6f 73 65 73 20  | speed purposes |
000001f0  6f 6e 6c 79 29 0a 77 68  65 72 65 20 30 3c 3d 70  |only).where 0<=p|
00000200  72 6f 62 3c 3d 31                                 |rob<=1|
00000206