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wardyboi
13-10-2004, 10:47 AM
Here's something some ppl may not have known.. It is possible to make simple and theoretically, more complex stereograms with CAD.
I've had a bash as this is something that interests me a lot.

I've found out that if you vary the distance between entities, it gives the illusion of depth. If you can do Magic eye type stereograms then try it!

Do a row of 10 rectangles.. 10x10mm for instance and put a 20mm space between each. Now below do a row of 9 or 10 rectangles with a spacing of 25mm. Now relax your eyes and you should see what I mean.. Lots of fun for little effort. (In my opinion its fun anyhow- GEEK ALERT!!)


By the way.. If anyone doesn't know how to see stereograms I can explain a method.

1. Put your index fingers in front of your face pointing upwards about 4cm apart..
2. adjust your eyes so that your fingers overlap.
3.Apply this technique to the repeating patterns in a stereogram and voila!

Hope this helps and/or interests someone.

VERYCIVILDRAFTER
13-10-2004, 11:25 PM
I feel like I’m riding around on wardy's coat tails, but he’s been so inspiring lately.

The image below is a Cross Eye image. If you cross your eye’s to where the left eye looks at the right image and the right eye looks left, the image becomes (booming voice) THREE DIMENSIONAL!!!

The easiest way to view this is to cut a square in a piece of paper about the 1/2 the size of the image. Then see the graphic below to understand because it takes to long to explain.

or read this http://www.vision3d.com/methd04.html

I made this drawing by setting up the right view port (with dview), I then copied the view port to the left, (using “dview” again) changed the camera angle and position on the target by about 2 degrees. 2 degrees is about the difference between your eyes at 2 meters. The more you change the camera position the greater the 3d effect but the harder it is to actually view.

Thank you AutoCAD R14 for your cool sample drawing. My drawing didn’t have any nice surfaces to render so I just used hide.

This is a pretty easy “at home” camera trick if you have a tri-pod. And the 3d effect is pretty fantastic with a real picture, but not so cool in acad wireframe.

wardyboi
14-10-2004, 12:48 PM
I couldn't do cross eyed method until i read that post.