Home » Archimedes archive » Acorn User » AU 1995-06.adf » !StarInfo_StarInfo » Horman/!Stereo/!Help

Horman/!Stereo/!Help

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 1995-06.adf » !StarInfo_StarInfo
Filename: Horman/!Stereo/!Help
Read OK:
File size: 0F14 bytes
Load address: 0000
Exec address: 0000
File contents
!Help file for Stereo v2.00

Introduction
~~~~~~~~~~~~
Stereo is an application which can be used to generate autostereograms from
any appropriate sprite files. As far I know it is unique in that it not only is it written in code, but it does not need a special designer. Any bitmap
art package, especially Paint, can be used to create the maps (see below).

Included with Stereo is a simple compression utility, which generates valid
compressed maps for use with Stereo. However, this compression routine is
only useful for compressing stereogram maps (see !Compress.Help)

Creating stereogram maps
~~~~~~~~~~~~~~~~~~~~~~~~
Stereo uses 640x256 mode 15 sprites to generate the autostereograms, although
the right-hand 96x256 column is ignored by the program in order to make room
for the pattern. It uses the internal colour numbers as shown in the
256-colour palette in Paint. This can be used as a reference.

Each colour represents a different depth in the autostereogram. Colour 0
(black in the internal palette) is the deepest, and 95 (light orange) is the
shallowest. 95 is the absolute maximum, and any higher colour will corrupt
the image. However, you should try to limit yourself to 45 or below, as any
large differences from one point to another will result in "echoing" of the
right hand side of the object. If the number of colours is limited, and you
try to achieve a small graduation of depths, the echoes will be less
noticable.

You must make sure that your sprites are the correct size, and be sure that
they have no mask.

Creating autostereograms
~~~~~~~~~~~~~~~~~~~~~~~~
Once you have created your map, just drag it, or its compressed equivalent,
on to the Stereo sprite on the icon bar. Double-clicking also works on the
compressed files. In order to save on memory, Stereo and Compressor both use
screen memory, and both require 160k during any creation or compressing.

When it is created, the autostereogram will be displayed on screen until the
mouse is clicked. It can then be displayed again at any time by clicking with
Select on the Stereo icon.

Autostereogram patterns
~~~~~~~~~~~~~~~~~~~~~~~
The pattern is the sprite file used as the basic strip of the autostereogram.
It is then copied across the screen and stretched or squashed to create the
differences that give an autostereogram its three-dimensional effect.

Each pattern is a mode 15 96x256 sprite. It may have a palette, which will be
ignored by Stereo, but it must not have a mask.

The patterns are kept in !Stereo.Patterns, and are read in when the program
is initially loaded. You can use a different pattern by choosing one from the
'Pattern' submenu on the icon bar menu, but you will have to reload the
autostereogram pattern before it is actually displayed.

If you alter the Patterns directory while the program is loaded, the program
can be forced to update its pattern list by choosing the 'Update' option from
the main menu. The program will do this automatically if it cannot find a
chosen file. Think carefully when choosing your pattern, as they are loaded
up from disc each time they are selected.

If no patterns are found, the program will report the error and quit itself.

Saving autostereograms
~~~~~~~~~~~~~~~~~~~~~~
Originally, this was not to be implemented, as Stereo itself will display any
autostereogram, and can save disc space with its compressed files.

However, by saving the autostereograms as sprites, it is possible to create
autostereogram animations, and these can be very impressive.

After an autostereogram has been created, it can be saved from the standard
'Save' option on the main menu.

Contact
~~~~~~~
If you create any interesting autostereograms, animations, or have
suggestions for improvement, send them to :

Dave Horman,
Beaumont Hill,
St Peter,
Jersey,
CI
JE3 7BR

or you can mail me as Dave Horman on Arcade BBS.
00000000  21 48 65 6c 70 20 66 69  6c 65 20 66 6f 72 20 53  |!Help file for S|
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00000020  72 6f 64 75 63 74 69 6f  6e 0a 7e 7e 7e 7e 7e 7e  |roduction.~~~~~~|
00000030  7e 7e 7e 7e 7e 7e 0a 53  74 65 72 65 6f 20 69 73  |~~~~~~.Stereo is|
00000040  20 61 6e 20 61 70 70 6c  69 63 61 74 69 6f 6e 20  | an application |
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000000a0  20 41 73 20 66 61 72 20  49 20 6b 6e 6f 77 20 69  | As far I know i|
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00000260  7e 7e 7e 7e 7e 7e 7e 7e  7e 7e 7e 7e 7e 7e 7e 7e  |~~~~~~~~~~~~~~~~|
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00000620  7e 7e 7e 7e 7e 7e 7e 7e  7e 7e 7e 7e 7e 7e 7e 7e  |~~~~~~~~~~~~~~~~|
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00000830  65 72 6e 73 0a 7e 7e 7e  7e 7e 7e 7e 7e 7e 7e 7e  |erns.~~~~~~~~~~~|
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00000900  61 75 74 6f 73 74 65 72  65 6f 67 72 61 6d 20 69  |autostereogram i|
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00000a60  69 63 6f 6e 20 62 61 72  20 6d 65 6e 75 2c 20 62  |icon bar menu, b|
00000a70  75 74 20 79 6f 75 20 77  69 6c 6c 20 68 61 76 65  |ut you will have|
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00000bc0  63 61 72 65 66 75 6c 6c  79 20 77 68 65 6e 20 63  |carefully when c|
00000bd0  68 6f 6f 73 69 6e 67 20  79 6f 75 72 20 70 61 74  |hoosing your pat|
00000be0  74 65 72 6e 2c 20 61 73  20 74 68 65 79 20 61 72  |tern, as they ar|
00000bf0  65 20 6c 6f 61 64 65 64  0a 75 70 20 66 72 6f 6d  |e loaded.up from|
00000c00  20 64 69 73 63 20 65 61  63 68 20 74 69 6d 65 20  | disc each time |
00000c10  74 68 65 79 20 61 72 65  20 73 65 6c 65 63 74 65  |they are selecte|
00000c20  64 2e 0a 0a 49 66 20 6e  6f 20 70 61 74 74 65 72  |d...If no patter|
00000c30  6e 73 20 61 72 65 20 66  6f 75 6e 64 2c 20 74 68  |ns are found, th|
00000c40  65 20 70 72 6f 67 72 61  6d 20 77 69 6c 6c 20 72  |e program will r|
00000c50  65 70 6f 72 74 20 74 68  65 20 65 72 72 6f 72 20  |eport the error |
00000c60  61 6e 64 20 71 75 69 74  20 69 74 73 65 6c 66 2e  |and quit itself.|
00000c70  0a 0a 53 61 76 69 6e 67  20 61 75 74 6f 73 74 65  |..Saving autoste|
00000c80  72 65 6f 67 72 61 6d 73  0a 7e 7e 7e 7e 7e 7e 7e  |reograms.~~~~~~~|
00000c90  7e 7e 7e 7e 7e 7e 7e 7e  7e 7e 7e 7e 7e 7e 7e 0a  |~~~~~~~~~~~~~~~.|
00000ca0  4f 72 69 67 69 6e 61 6c  6c 79 2c 20 74 68 69 73  |Originally, this|
00000cb0  20 77 61 73 20 6e 6f 74  20 74 6f 20 62 65 20 69  | was not to be i|
00000cc0  6d 70 6c 65 6d 65 6e 74  65 64 2c 20 61 73 20 53  |mplemented, as S|
00000cd0  74 65 72 65 6f 20 69 74  73 65 6c 66 20 77 69 6c  |tereo itself wil|
00000ce0  6c 20 64 69 73 70 6c 61  79 20 61 6e 79 0a 61 75  |l display any.au|
00000cf0  74 6f 73 74 65 72 65 6f  67 72 61 6d 2c 20 61 6e  |tostereogram, an|
00000d00  64 20 63 61 6e 20 73 61  76 65 20 64 69 73 63 20  |d can save disc |
00000d10  73 70 61 63 65 20 77 69  74 68 20 69 74 73 20 63  |space with its c|
00000d20  6f 6d 70 72 65 73 73 65  64 20 66 69 6c 65 73 2e  |ompressed files.|
00000d30  0a 0a 48 6f 77 65 76 65  72 2c 20 62 79 20 73 61  |..However, by sa|
00000d40  76 69 6e 67 20 74 68 65  20 61 75 74 6f 73 74 65  |ving the autoste|
00000d50  72 65 6f 67 72 61 6d 73  20 61 73 20 73 70 72 69  |reograms as spri|
00000d60  74 65 73 2c 20 69 74 20  69 73 20 70 6f 73 73 69  |tes, it is possi|
00000d70  62 6c 65 20 74 6f 20 63  72 65 61 74 65 0a 61 75  |ble to create.au|
00000d80  74 6f 73 74 65 72 65 6f  67 72 61 6d 20 61 6e 69  |tostereogram ani|
00000d90  6d 61 74 69 6f 6e 73 2c  20 61 6e 64 20 74 68 65  |mations, and the|
00000da0  73 65 20 63 61 6e 20 62  65 20 76 65 72 79 20 69  |se can be very i|
00000db0  6d 70 72 65 73 73 69 76  65 2e 0a 0a 41 66 74 65  |mpressive...Afte|
00000dc0  72 20 61 6e 20 61 75 74  6f 73 74 65 72 65 6f 67  |r an autostereog|
00000dd0  72 61 6d 20 68 61 73 20  62 65 65 6e 20 63 72 65  |ram has been cre|
00000de0  61 74 65 64 2c 20 69 74  20 63 61 6e 20 62 65 20  |ated, it can be |
00000df0  73 61 76 65 64 20 66 72  6f 6d 20 74 68 65 20 73  |saved from the s|
00000e00  74 61 6e 64 61 72 64 0a  27 53 61 76 65 27 20 6f  |tandard.'Save' o|
00000e10  70 74 69 6f 6e 20 6f 6e  20 74 68 65 20 6d 61 69  |ption on the mai|
00000e20  6e 20 6d 65 6e 75 2e 0a  0a 43 6f 6e 74 61 63 74  |n menu...Contact|
00000e30  0a 7e 7e 7e 7e 7e 7e 7e  0a 49 66 20 79 6f 75 20  |.~~~~~~~.If you |
00000e40  63 72 65 61 74 65 20 61  6e 79 20 69 6e 74 65 72  |create any inter|
00000e50  65 73 74 69 6e 67 20 61  75 74 6f 73 74 65 72 65  |esting autostere|
00000e60  6f 67 72 61 6d 73 2c 20  61 6e 69 6d 61 74 69 6f  |ograms, animatio|
00000e70  6e 73 2c 20 6f 72 20 68  61 76 65 0a 73 75 67 67  |ns, or have.sugg|
00000e80  65 73 74 69 6f 6e 73 20  66 6f 72 20 69 6d 70 72  |estions for impr|
00000e90  6f 76 65 6d 65 6e 74 2c  20 73 65 6e 64 20 74 68  |ovement, send th|
00000ea0  65 6d 20 74 6f 20 3a 0a  0a 44 61 76 65 20 48 6f  |em to :..Dave Ho|
00000eb0  72 6d 61 6e 2c 0a 42 65  61 75 6d 6f 6e 74 20 48  |rman,.Beaumont H|
00000ec0  69 6c 6c 2c 0a 53 74 20  50 65 74 65 72 2c 0a 4a  |ill,.St Peter,.J|
00000ed0  65 72 73 65 79 2c 0a 43  49 0a 4a 45 33 20 37 42  |ersey,.CI.JE3 7B|
00000ee0  52 0a 0a 6f 72 20 79 6f  75 20 63 61 6e 20 6d 61  |R..or you can ma|
00000ef0  69 6c 20 6d 65 20 61 73  20 44 61 76 65 20 48 6f  |il me as Dave Ho|
00000f00  72 6d 61 6e 20 6f 6e 20  41 72 63 61 64 65 20 42  |rman on Arcade B|
00000f10  42 53 2e 0a                                       |BS..|
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