67 lines
2.8 KiB
Plaintext
67 lines
2.8 KiB
Plaintext
<!DOCTYPE html PUBLIC "-//IETF//DTD HTML 2.0//EN">
|
|
|
|
<HTML>
|
|
<HEAD>
|
|
<TITLE>Introduction to Procedural Textures</TITLE>
|
|
<LINK type="text/css" rel="stylesheet" href="../webdocs.css">
|
|
</HEAD>
|
|
|
|
<BODY>
|
|
<H1>Procedural Textures<IMG src="kawaii1.gif" align="right"
|
|
alt="anime girl"></H1>
|
|
|
|
<P>Procedural textures provide interesting visual effects by
|
|
modifying the color values of a texture in real time. Some
|
|
procedural textures can be controlled from APE, which can
|
|
greatly enhance the interactive feel of the game. For some
|
|
quick ideas on what procedural textures can do, load up map <B>
|
|
joeyproc</B> and look around.</P>
|
|
|
|
<H4>General Information</H4>
|
|
|
|
<P>All procedural texture are created through the use of text
|
|
scripts called Anachronox Texture Definition files. Definition
|
|
files have the extension <B>.atd</B> and are used as
|
|
replacements for normal textures. For example, if you use the
|
|
texture <B>water4.tga</B> in some area and you want to use a
|
|
procedural texture instead, just place <B>water4.atd</B> in the
|
|
same directory and move or rename the old image. This way, you
|
|
can easily replace textures for not only world brushes, but
|
|
also models and 2D interfaces! All texture definition files
|
|
must start with the four characters "ATD1" on the very first
|
|
line, you will see this string often in the documentation.</P>
|
|
|
|
<H4>ATD File Conventions</H4>
|
|
|
|
<P>Spaces aren't important, so you can format your files to
|
|
look nice. Comment lines must have <B>#</B> as the first
|
|
non-whitespace character in the line. End-of-line may be
|
|
indicated by LF or CRLF.</P>
|
|
|
|
<H4>Old vs. New</H4>
|
|
|
|
<P>This document describes how to implement procedural textures
|
|
on model and level geometry using the "new" method. The "old"
|
|
method, which involved creating a long and confusing string in
|
|
a level's worldspawn, was difficult to use and incurred a major
|
|
performance penalty. The new procedural texture code is easy to
|
|
use, flexible, and <I>fast</I>. Map joeyproc has over 4 MB of
|
|
textures visible at a time, many of them procedural, and it
|
|
still runs at 40 fps on our low-end voodoo 2 systems.</P>
|
|
|
|
<H4>Voodoo2 support</H4>
|
|
|
|
<P>Use of the 3fx mini-client driver is NOT recommended, since
|
|
bugs in that driver prevent the correct display of certain
|
|
procedural textures. Instead, use the metagl driver by adding
|
|
"+set gl_driver metagl" in your shortcut.</P>
|
|
|
|
<H4>Comments and questions</H4>
|
|
|
|
<P>This document and the code it describes was written by Joey. Therefore, any suggestions or
|
|
comments concerning this documentation or bug fixes/feature requests for procedural textures
|
|
should go to him.</P>
|
|
</BODY>
|
|
</HTML>
|
|
|