Author Topic: HeadTracking working but not 3D  (Read 8403 times)

Offline anitabill

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on: January 09, 2008, 02:24:56 PM
I have gotten the head tracking working great, but for the life of me I can not get the 3D working. Is there something I am doing wrong? Is the 3D effect only visible through a video camera? I have built my own IR glasses as well as tried it with the actual Wii censor bar. Iím using XP with a Compusa Bluetooth dongle. Iíve try the both Bluesoleil drivers as well as the Toshiba BT stack. Iím able to use all of the futures of the Wiimote at least I think I can. I used widApp and was able to turn on and off the LEDís make it rumble ectÖ Any help would be greatly appreciated.

By the way Johnny Thanks a ton. This was a great project.

If I get a few extra minutes tonight Iíll post a picture of my Frankenstein glasses and IR LED pen.

Bill



Offline Thunderstorm99

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Reply #1 on: January 09, 2008, 05:19:01 PM
Hey i know this doesnt help you but i have the same problem...
I havent tried it with IR LEDs on Glasses but i tried so with IR LEDs of my Remote Controls.
It was all right with the angle but no 3D. Thanks for help.
Greetz Thunderstorm

EDIT: there is another problem i cant change in the config.dat the entry "screenHieght(mm):508" to "screenHieght(mm):3000" its always crashing if i change it like that.
« Last Edit: January 09, 2008, 05:25:44 PM by Thunderstorm99 »



Offline MadManMike

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Reply #2 on: January 09, 2008, 09:39:20 PM
I also thought It was going to look 3d like in the video :(  But later figured out that it's  not going to look as good as when you see it through a camera.

Johnny posted this about how you could make it look better and it kind of explains why it looks better with the camera:

"Shutter/polarized glasses - if you are going to put something on your head covering your eyes for 3D, it is worth considering making shutter/polarized glasses which allows the computer to deliver a different image to each eye. This results in stereoscopic displays. Combined with head tracking, you get a DARPA grade 3D simulator. When just doing head tracking, the conflicting stereo depth cues weakens the illusion. I would love to do this, but it's quite a bit more hardware, and requires synchronization with the display refresh (or light polarization) which often isn't easy especially given the wide variety of display technologies out there."

So basically I think what he is saying is with just a camera it makes it look great because there is only one lens, and we have 2 eyes :) So to make it look good for our eyes you would have to have 2 images slightly offset from each other, and then use a shutter system for the glasses or maybe a Red lens/Green lens like the cheapo 3d movies.

This is just my understanding of it :)

-Mike



Offline gabort

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Reply #3 on: January 12, 2008, 03:57:07 PM
...

EDIT: there is another problem i cant change in the config.dat the entry "screenHieght(mm):508" to "screenHieght(mm):3000" its always crashing if i change it like that.

Let me get this right: You have a screen that is 3 meters high?



Offline cyberjobe

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Reply #4 on: January 15, 2008, 07:50:42 AM
Maybe he's getting the same error I got. I can't feel that Z axis is changing (targets growing and getting smaller). The targets do move as I move but little or no scale is done at all. That would cause the 3d effect.



Offline Jake of All Trades

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Reply #5 on: January 17, 2008, 07:17:17 PM
I'm afraid you've misunderstood what type of 3D we're talking about here.  This isn't about making images pop out or go deep like normal 3D glasses and the like, this is about something called "parallax"; or the way things seem to shift in relation to each other when you look at them from different angles.  Actually, calling them different types is a bit misleading--they're really two parts of a whole.  If you could combine this with the setup they have at IMAX theaters, it would be nearly indistinguishable from reality!

Anyway, try closing one eye.  This eliminates depth perception from the equation and allows the brain to be really "fooled" by what's happening on the screen.  With both eyes open your brain knows that even though the objects are shifting about like 3D things, but it can still tell that there is no depth and thus concludes that it's just a flat image.  With one eye shut, however, it has to rely solely on parallax to make this determination.  This is the main reason why it looks better on the video: cameras do not record in stereo.  I know closing an eye is pretty counterintuitive when trying to see 3D, but believe me; it makes a huge difference.



Offline anitabill

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Reply #6 on: January 18, 2008, 12:12:28 PM
Jake,

Thank you for your reply.

Am I understanding you correctlyÖIf I shut one eye then I should see the depth and the targets popping out of the screen like in Johnny video? Or are you saying that this can only be accomplished with the use of a camera.

Iím not home to try this.



Offline troy59

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Reply #7 on: January 19, 2008, 01:03:08 PM
yes, if you cover one eye, your brain doesn't really know if it is 3d or not because it has no depth perception, thats why the camera makes it look so 3d