P3D Re: Drawing Anaglyphs

[Larry Berlin <lberlin@xxxxxxxxx>]

>Date: Thu, 16 Apr 98 
>From: Jeff <JeffGin@xxxxxxxxxxxxx>
>..............
>
>Hello. I'm new to the list and also a stereo enthusiast.
>
>I'd like to know how to draw stereo pairs and anaglyphs.
>I have the book from Reel 3D about drawing anaglyphs on
>the phantogram perspective charts,  but with those you 
>have to view them from the side,  @ a 45 degree angle.  
>I want to create simple anaglphs that you can view at any
>angle,  (i.e...so you can see them on the computer screen,
>or a t-shirt)  I've seen many web sites with simple anaglyph
>designs,  such as a "3" in front of a "D".  How do they do that?
>
>Jeff Jones,
>Portland, Oregon.
>

There are two parts to the answer. One is about making anaglyphs, which is
just one of many presentation methods for stereo images. The other has to do
with drawing or otherwise creating stereo images. Both are relatively simple
to understand, but learning to draw in stereo extends the simple basics far
enough to become very complex.

Creating anaglyphs has been discussed many times before so review the
archives for more information. Simply put, you copy the Left eye's image to
the clipboard, then paste it into the Red channel of the Right eye's image.
Go back to RGB mode and you have an anaglyphic image.

To freeview anaglyphs, repeat the process but copy the Right eye's image to
the Left eye's view. Place this anaglyph next to the first anaglyph and
freeview. (see this URL for an example...
http://www.3dzine.simplenet.com/features/aniluzn2.html  ....)

Drawing in stereo is essentially a process of drawing two copies of anything
you draw. Then introduce horizontal parallax appropriate to your intended
depth placement. It's important to avoid vertical displacements. Be very
careful of edges and textures within your image.

A computer is kind of an ideal place to do this work since it allows you to
freely work with exact duplicates of anything. Selection tools are the best
for doing this. No selection tools available anywhere are as versatile or
easy to use as those in Aldus PhotoStyler 2.0. You can however do most of
the basics in just about any graphics program, they just lack the ability to
manipulate the selections as freely.

Learn freeviewing and you have the entry key to realtime 3D drawing using
today's basic computer. It's nice to have the other frills, but freeviewing
allows direct stereo work while in ordinary low-powered 2D environments.

Once you've drawn something, make analgyphs of the results, and hopefully
some JPS images too, for the internet.

All the texture patterns on my site are created by hand using this basic
method. It may not be drawing in the sense you want, but the process would
work for you too.

>such as a "3" in front of a "D".  How do they do that?

3  D          3  D          3   D          3    D          3     D 

Larry Berlin

Email: lberlin@xxxxxxxxx
http://www.sonic.net/~lberlin/
http://3dzine.simplenet.com/


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