Meant to be Seen

Hello, all. My name is Don. I was swept into this whole thing when I saw the "glasses free 3d gaming for $5" on youtube, after searching for a diy parallax barrier. This is indeed a complicated endeavor, so far. Here's the data I've come up with for my laptop screen (I have another monitor, don't worry, lol)

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MAIN DATA |
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Gateway NV52 LED LCD Display @ 1024 x 768 px. (Native 1366 x 768).

Under these circumstances, the following specifications have been provided.

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10.66 inches wide

07.99 inches tall

113.6356 + 63.8401 = 117.4757

square root of 117.4757 = 10.8386208 <-- (DIAGONAL SIZE)
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Display dimensions calculator: |
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1024 | |
768 | |
10.8386208 | |
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http://thirdculture.com/joel/shumi/comp ... icalc.html" onclick="window.open(this.href);return false; |
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Dot pitch (mm) = 0.2151

Dot pitch (in) = 0.0084685039370079

Dot pitch (in) times 1200 = 10.16220472440948

10.16220472440948 times 2 = 20.32440944881896

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PHOTOSHOP REQUIREMENTS 1|
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1.) File > New

2.) Width = 20.32440944881896 px

2a.) Height = 1 px

3.) Grayscale 8-bit

4.) Background Contents: White

5.) Resolution: 72 dpi

6.) Press "M" to select the Rectangular Marquee Tool.

7.) Press "Control"+"R" so show the rulers. Then right-click the ruler and select "Pixels".

8.) Select a 10.16220472440948px x 1px area on the left side of the image.

9.) Press "Alt"+"Delete" to fill it with black.

10.) Press "Control"+"D" to deselect the area.

11.) Click "Edit" -> "Define Pattern...".

12.) Name it something sensible like "10.16220472440948px barrier".

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PHOTOSHOP REQUIREMENTS 2|
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1.)File > New

2) Set the following options:

Width: 8.5 inches

Height: 11 inches

Resolution: 1200 ppi (must be the maximum dpi of your printer)

Color Mode: Grayscale 8-bit

Background Contents: White

3) Double-click the locked background layer and hit "Enter" to make it a new layer.

4) Click the "fx" button on the bottom of the layer window (or click "Layer" -> "Layer Style").

5) Hit the "Pattern Overlay" button.

6) Click the pattern thumbnail, then scroll down to the pattern you just created (if you hover over it for a second it will tell you the name).

7) Click OK.

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PRINTING THE BARRIER |
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1.) Set printer to maximum quality.

2.) Print onto an 8.5x11" transparency.






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Please note, I am using my school's printer for this (laser printer, thermal emboss... w/e), and it supports 1200x1200 dpi. I know this may be a small number, but keep in mind I'm only using a 10.8386208 inch screen @ 1024x768.

I am looking foreward to school tomorrow (that's a first), so I can print this pattern. I have my own 8.5 x 11 transparencies. What are your thoughts on this?

That sounds about right, except you want to make the document 11" x 8.5" and then print in "landscape" mode. Otherwise the lines are going to be the wrong way. They need to be vertical (up and down). You may have to adjust the pattern slightly, but what you did sounds like a good starting point for testing. Just don't expect it to work perfect on the first shot. A good method for testing different sizes to to make a document with smaller horizontal strips (for example 1 or 2 inches high) with different sized patterns on them. Then you just have to make 1 printout, but you can test 4 or 5 different sizes. That way you save of paper and ink.

Also, if you are totally inexperienced with 3D, you may want to try a pair of paper anaglyph glasses first. That way you can understand how the 3D drivers work and how its supposed to look. If you send me a PM with your address I can send you a free pair of glasses.

Sweet. This is actually my second try, but on a different monitor. I'll keep you posted.

EDIT: I'm not that new to 3d, lol. I've been into it for quite some time. I was first introduced to anaglyphs in around 2002...

looks like you aren't using your native resolution. if your screen is 1366x768, that's the resolution you'll have to use.

Really? Because I used a screen ruler to measure it at 1024x768. That is how I got that 10.whatever diagonal size (after of course running it through the pythagorean theorum).

yes, if set to display 1024x768 pixels, your display driver will stretch the image out to fit the panel. This blurs the image quite badly and stretches everything out horizontally. For the parallax to work, you'll have to use the native display resolution. Btw all monitors should always be used at their native resolution, because it will make things very much sharper and will display everything at the correct aspect ratio.

That's my point... It doesn't stretch it out to fit the panel. There is black around the sides.

oh, i see! sorry, my bad.

I've just noticed a mistake in the calculations though, 113+67 isn't 117 but, in fact, 180

by the way, it'd be better if you calculated the dot pitch directly using only the horizontal components(since they're the ones that matter), instead of first calculating the diagonal size.
just do 10.66/1024 and you're done - that's your horizontal dot pitch in inches.

Awesome. Thanks for the tip!

Anotehr technique (that I haven't tried yet, but might work) is to apply the pattern to an image with the size of the native resolution of the display (ie 1366x768). Then print it out scaled to the size of your monitor (ie 10.66" width). That may be much easier, but I haven't tested it yet.

Yup. lol. I should probably ask the school if I can print out another (due to my prior miscalculation). The thing is, I think they may be getting aggrevated at me using their printer. I don't know, maybe it's just me and my paranoia. Do you think perhaps a library my be able to help?

Sorry for any lack of grammatical coherence in this post... I just woke up.

-Don

The thing is, most place will not have printers with 1200dpi resolution. Even places like KINKO's only do 600dpi.