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1995-05-05
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Targa to Quick Ray Trace Converter
Documentation
Version 1.00
Released April 19, 1992
by Lonny L. Pursell
(C)1992 by Lonny L. Pursell and Encom
All rights reserved.
FREEWARE
--------
I decided this program should be released as FreeWare since it's fairly
simple to operate and doesn't really do that much.
DISCLAIMER
----------
This document and all versions of this program are
Copyright 1992 by Lonny L. Pursell and Encom
All rights reserved.
I (the author) am NOT responsible for any damage to hardware or the
loss of data due to the use or misuse of this program.
This program is NOT to be sold for profit nor can it be included in
any commercial package without the express written permission of the
author.
This documentation and the program cannot be modified in any way and
must remain together as a package.
WHAT IS IT?
-----------
Converts Targa files to Quick Ray Trace files.
This documentation assume you already have the Quick Ray Trace package
(QRT for short) and know how to operate RAW2SPEC.PRG contained within it.
INTRO
-----
As you know QRT comes with a Spectrum 512 post processor. It doesn't
do any scaling or at least the version I have doesn't, but it does have 3
levels of dithering to choose from. I purchased Prism-Render before
getting a TT so I came up with this file converter so I could at least
view Targa files at my ST's maximum color resolution. If you render at
320x200 then RAW2SPEC.PRG will do an excellent job of converting your
Targa files to Spectrum 512 format. That is after you convert your Targa
file to QRT's RAW format.
USING THE PROGRAM
-----------------
First you should know the following:
This utility will only read Targa files generated by Prism-Render.
Prism-Render only uses a very small subset of the Targa file format
so if Lexicor decides to incorporate some of these other options in
future versions of Prism-Render then this utility will surely break.
Due to the reverse nature of the Targa file format the entire Targa file
must be buffered. This means that if you have a 192K Targa file you'd
better have 192K+ if you want to even think about converting it.
Simply load the program from the GEM Desktop. After it's loaded
the file selector will appear prompting you for the input Targa file.
Selecting 'Cancel' will return you to the GEM Desktop. Select the
Targa file you wish to convert and select 'Ok'. The Targa file you
selected will be loaded and then the file selector will appear again.
This time select the output QRT file and select 'Ok'. Again, selecting
'Cancel' will return you to the GEM Desktop. The QRT file will be written
and you will be returned to the GEM Desktop.
Well, that's all there is to it. Pretty simple, eh?
ADDITIONAL INFORMATION
----------------------
This program was written on a stock Mega ST2 with TOS 1.4 and works
in all ST resolutions. It was coded in GFA-Basic 3.6TTE which is the
best Basic for the ST/STE/TT!
If an error is detected you will be alerted and the program will try
to recover if it can. All open files will be closed.
Maybe with some prompting from outside sources I could be talked into
adding 320x200 auto-scaling to this utility?
User Support
------------
This program was released as FreeWare, which means I don't expect
anything in return from others using it. If for some reason you feel
you must send me something, then by all means do so. If you simply want
to send me a letter telling me you like or dislike the program, that's
ok too.
I can be reached via U.S. Mail at this address...
Lonny Pursell
ATTN: TGA2RAW
P.O. Box 145
Pandora, OH 45877
TEL: (419)-384-3594 (ask for Lonny)
or I can be reached via modem on this fine BBS...
CodeHead Quarters BBS
(213)-461-2095
1200/2400/9600 baud
Username: Lonny Pursell
If you have a problem with this program or you discover a bug, then I
urge you to contact me. If so, please include the version number.
Thanks for any support you might send my way!
Acknowledgments
---------------
Atari is a trademark of Atari Corp.
GEM, GEM Desktop, and DRI are trademarks of Digial Reasearch Inc.
GFA and GFA Basic are trademarks of GFA Systemtechnik
QRT source and executable is Copyright 1988 Steve Koren.
QRT ST port by Robert Barnhardt.
Prism-Render is Copyright 1992 by Paul Dana
All other items mentioned are copyrighted by their respective owners.