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1996-09-14
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Tyla2 - Version 2.3 - by Mike Williams
======================================
Purpose: Tyla2 generates random tiled backdrops.
Author: Mike Williams <mike@econym.demon.co.uk>
Availability: The latest version of this program will always be on
<http://www.econym.demon.co.uk/other/>
Operation: Make sure that the filer has seen ChangeFSI,
then double-click on !Tyla2
Alter the parameters as required.
Click on [Refresh] to apply these parameters to the
existing tile.
Click on [New Tile] to generate a totally new tile.
To save a copy of the tile, click with the MENU button
and choose the SAVE SPRITE option
The edges of the !Tyla.Image sprite will always match, so that a smooth
continuous effect is obtained when the image is tiled. This is useful for
desktop backdrops, WWW backgrounds and textures for use in painting and
raytracing packages.
License: !Tyla2, its code, and the sprites it generates are
copyright Mike Williams, but may be distributed freely for
personal use and for WWW backdrops.
If you want to use any of this code or any generated sprites
in a commerical product, then don't hesitate to make me an
offer for permission to do so.
Note: Tyla will not operate on a read-only filing system
Tyla will not operate if ChangeFSI has nor been seen
Tyla will not operate if the Pinboard is not active
Some Tyla features require at least version 1.15 of ChangeFSI
SIZE
====
Tyla2 always generates square tiles. This parameter specifies the height and
width of the tile. Tyla currently caters for a size range between 10 and 256
pixels.
HINT: generate tiles with a small size for speed, then increase the size and
hit [REFRESH] when you see something you like.
CONVOLUTION
===========
There are two different convolutions, Linear and Quadratic. I'm not going to
attempt to describe the difference, you'll have to try them.
TONE
====
Tyla2 has 5 different tones, from "Very Dark" to "Very Pale"
Click on the TONE button to change the setting. Clicking with the ADJUST
button steps backwards through the settings.
COLOUR
======
Tyla2 has 8 different colour sets:-
Dull, Normal, Garish, Greyscale, Redscale, Bluescale, Greenscale, Rndscale
Click on the COLOUR button to change the setting. Clicking with the ADJUST
button steps backwards through the settings.
RULE
====
There are three different algorithms for generating patterns. These are:-
Wavicle, Swoosh, Ripply
Setting a rule to "Random" will cause the program to randomly choose one of
these three rules.
Setting a rule to "None" will cause no pattern to be generated in the
corresponding direction. This can be useful for getting an idea of what the
underlying pattern in the other direction looks like. You cannot set both
rules to "None" since that would cause a totally blank sprite to be
generated.
SHIFTS
======
These shape shifting rules cause the pattern to be bent or twisted, thus
breaking up any regular vertical or horizontal lines.
REFRESH
=======
Clicking this button causes the existing tile to be recalculated using any
new parameters you have set. If you don't like the changes, you can change
the parameters back to what they were and you'll get exactly the same tile
that you had before.
NEW TILE
========
Clicking this button causes an entirely new tile to be generated. Once
you've clicked on this, there's no way to go back to the previous tile.
SAVE SPRITE
===========
Select Save Sprite from the menu, edit the filename if required, and drag
the file to a filer window or an application which accepts sprites (e.g.
!Paint)
BPP sets the number of bits per pixel for the SAVED copy of the sprite. The
sprite which is tiled onto the pinboard has the same number of bits per
pixel as the current screen mode.
1 bit per pixel = 2 colours
2 bits per pixel = 4 colours
4 bits per pixel = 16 colours
8 bits per pixel = 256 colours
16 bits per pixel = 32 thousand colours
32 bits per pixel = 16 million colours
It's highly probable that old versions of ChangeFSI that were written before
16 and 32 bit sprites existed may exhibit strange behaviour when asked to
create such sprites.
SAVE CLEAR
==========
Select Save Clear from the menu, edit the filename if required, and drag
the file to a filer window or an application which accepts Clear files (e.g.
!ChangeFSI or !Translatr)
The Clear file will not have had gamma correction performed on it, so the
tone will be different from the sprite in many cases.
SAVE JPEG
=========
Select Save JPEG from the menu, edit the filename if required, and drag the
file to a filer window or an application which accepts sprites (e.g.
!ChangeFSI or !Translatr)
QUAL sets the quality of the JPEG image. Click with select or adjust to
increase or decrease the quality in increments of 5%.
This facility requires a fairly recent version of ChangeFSI
WWW backgrounds
===============
If you are using black text on your web page, then try setting the TONE
parameter to "Very Pale".
If you are using white text on you web page, then try setting the TONE
parameter to "Very Dark" and the COLOUR parameter to anything other than
"Garish". The "Dark/Dull" combination may also be suitable.