5.1 Exploring a 3D-fractal[ looking for somebody to translate this section... ]
The German version of this section describes how you could do with "Fractint" what you can do with Quat now (>=0.92) in the "Object Editor" if you use the user interface version.
5.2 Examples for the effect of some parametersHere is described how a z-resolution that is too low can cause strange images and how antialiasing can reduce the Moire-effect. All images are low-quality-JPEGs.
5.3 Cross eyed view (for true 3D perception of an object)Perhaps you know from the "Magic Eye" books that special ways to look at something (without any additional equipment like 3d glasses) can produce very amazing three dimensional perceptions. The principle used by Quat is different from that of the "Magic Eye" books (Autostereograms), but in my opinion it is easier to learn and achieves great results!
The principle is as follows: Two images seen from two slightly different points are calculated and displayed next to each other. The image to the right is for the left eye, the image to the left for the right eye. (Thus the name "cross eyed"). If you hold your thumb in ca. 10 cm distance in front of your eyes and look at it as usual, you'll remark that you see the background twice. This is what the principle builds on.
Look at the example image above. Sit in front of the screen at the distance
you usually work at, and then hold your thumb between screen and your eyes
(nearer to the eyes than to the screen). You should sit straight in front
of the screen, not incline your head and not look from beside at the screen.
Now look at the thumb as usual. Pay attention to the images on the screen
(without looking at them directly, always look at the thumb!)
5.4 The initialization file(s)Initialization files are used to feed Quat with the parameters it needs for image generation.
Users of a version with user interface (Windows, X Window System): Though this paragraph also applies to these versions, most users probably do not need to read it. You can use the dialogs to enter parameters conveniently - but if you want, you can also use initialization files.
To start a calculation in the text only versions, a so-called "initialization
file" is needed, in which the object, the view, the colors and intersection
planes are defined. This file (and all that are "included", see below)
are simple text files, which can be written in any common text-editor,
(for example, "edit" with DOS, "notepad" with Windows, "vi" with Unix).
The syntax used is very simple, in every line there is a keyword with a
list of parameters following. (e.g., "viewpoint 0 0 1" defines the viewpoint)
Suggestion of how to separate the data in different files:
This concept may appear a little bit complicated on the first view, but it offers high flexibility. For example, it allows to give the fractal other colors very quickly, or to add some intersection planes without changing something on the object-definition itself: Only one line in the INI-file has to be changed. But for those who still think this to be too complicated: You can use all keywords in the initialization file, too.